Answer:
I think its C
Answer:
D
Explanation:
If the temperature doesn't change but the mass of the object increases, the thermal energy in the object increases.
Imagine that the Earth's size shrunk by a factor of 5.70 from a radius of 1120 km to a radius of 6370 km. However, Earth's mass has remained the same at 5.98×1024 kg. If a person's mass is 80.7 kg, calculate their weight before and after Earth's shrinkage in Newtons and pounds
The weight of the person in the first case is 25759.44 N while in the second it is 790.86 N.
What is weight?Weight is the product of mass and acceleration due to gravity. We have to find the acceleration due to gravity in both cases.
g = GM/r^2
g1 = 6.67 × 10^−11 m3 kg−1 s−2 * 5.98×10^24 kg/(1120 * 10^3 m)^2
g1 = 3.99 * 10^14/1.25 * 10^12
g1 = 319.2 m/s^2
g2 = 6.67 × 10^−11 m3 kg−1 s−2 * 5.98×10^24 kg/( 6370 * 10^3 m)^2
g2 = 3.99 * 10^14/4.06 * 10^13
g2 = 9.8 m/s^2
The weight of the person in the first case is; 80.7 kg * 319.2 m/s^2
= 25759.44 N
The weight of the person in the second case is; 80.7 kg * 9.8 m/s^2
= 790.86 N
Learn more about weight:https://brainly.com/question/10069252
#SPJ1
The unknown quantities to be determined are (a) the capacitive reactance, (b) the maximum and the rms voltages from the source, and (c) the rms current in the capacitor.
Evaluate the capacitive or inductive reactance, XC or XL.
The unknown quantity to be determined in part (a) is the circuit's capacitive reactance
XC defined as
XC ≡ 1/2fC
,
where, in this problem, C = 4.48 F and the AC source frequency f must be determined.
What is the frequency f of the AC source?
The frequency f of the AC source is determined as 0.446 Xc.
Frequency of the AC sourceThe frequency of the AC source is calculated as follows;
Xc ≡ 1/2fC
where;
Xc is the capacitive reactancef is frequencyC is capacitancefC = 2Xc
f = 2Xc / C
f = (2Xc)/4.48
f = 0.446 Xc
Thus, the frequency f of the AC source is determined as 0.446 Xc.
Learn more about frequency here: https://brainly.com/question/10728818
#SPJ1
An object has a weight of 9 n when it is in air and 7.2 n when it is submerged into water. what is the specific gravity of the object’s material?
The specific gravity of the object’s material is 5.09.
To calculate the specific gravity of the object:Weight difference = 9 - 7.2 = 1.8 N = Buoyant force of water
Buoyant Force in water(Fb) = density of water x g x volume of the body(Vb)
1.8 = 1000 x 9.81 x Vb
Vb = 1.8/9810 cubic meter
Now, in the air;
Weight of body = mg = 9 N
Mass of body,m = 9/9.81 Kg
So,
Density of body = m/ Vb
= 9/9.81 ÷ 1.8/9810
= 5094.44 kg per cubic meter
The specific gravity of body = density of body ÷ density of water
= 5094.44 ÷ 1000
= 5.09
Therefore, Specific gravity of body = 5.09
Learn more about Specific gravity here:
https://brainly.com/question/13258933
#SPJ4
Traumatic brain injury such as concussion results when the head undergoes a very large acceleration. Generally, an acceleration less than 800 m/s2 lasting for any length of time will not cause injury, whereas an acceleration greater than 1,000 m/s2 lasting for at least 1 ms will cause injury. Suppose a small child rolls off a bed that is 0.56 m above the floor. If the floor is hardwood, the child's head is brought to rest in approximately 2.2 mm. If the floor is carpeted, this stopping distance is increased to about 1.3 cm. Calculate the magnitude and duration of the deceleration in both cases, to determine the risk of injury. Assume the child remains horizontal during the fall to the floor. Note that a more complicated fall could result in a head velocity greater or less than the speed you calculate. Answer the following:
1.hardwood floor magnitude
2.hardwood floor duration
3.carpeted floor magnitude
4.carpeted floor duration
This question is health related and seeks to compute the details surrounding a traumatic head injury. See the explanation below.
What is a traumatic head injury?Traumatic brain injury (TBI), a form of acquired brain injury, occurs when a sudden trauma causes damage to the brain.
TBI can result when the head suddenly and violently hits an object, or when an object pierces the skull and enters brain tissue
What are the details surrounding the head injury?Final velocity before hitting the ground
V² = 2g*0.56
V² = 2 * 9.8 * 0.56
V = √10.976
V = 3.312 m/s
*** Note that g which is the acceleration of gravity is about 9.8 meters.
1a) Where there is a hardwood floor
-u^2 = -2as
a = 3.312^2/2*0.0019
a = 1,042.08 m/s^2
1b) Duration
t = u/a
= 3.312/1,042.08
t = 3.18 ms
2a) Where there is a carpet on the floor
a = 3.312^2/2*0.013
a = 713.01 m/s^2
t = u/a
= 3.312/713.01
t = 4.65 ms
Learn more about head trauma at;
https://brainly.com/question/1445399
#SPJ1
Which action will cause the magnetic force to push two magnets closer together?
The action that will cause the magnetic force to push two magnets closer together: is that of attraction which happens when opposite poles of the magnets approach.
Meaning of magnetic forcemagnetic force can be defined as the effect that is felt by magnetic objects that causes attraction and repulsion.
A magnetic force attracts two magnets when they are in opposite poles and repels them if they are in the same pole.
In conclusion, The action that will cause the magnetic force to push two magnets closer together: is that of attraction which happens when opposite poles of the magnets approach.
Learn more about magnetic force: https://brainly.com/question/2279150
#SPJ1
What is the equivalent resistance of a circuit that contains three 10.0 Ω
resistors connected in series to a 6.0 V battery?
Ο A. 0.600 Ω
Ο Β. 60.0 Ω
Ο C. 16.0 Ω
Ο D. 30.0 Ω
Question :
What is the equivalent resistance of a circuit that contains three 10.0 Ω resistors connected in series to a 6.0 V battery?Options given :
A. 0.600 ΩΒ. 60.0 ΩC. 16.0 ΩD. 30.0 ΩSolution :
As we know that,
When a circuit is connected in series resistance is calculated by :
Rs = R1 + R2 + R3 .... RnHere,
R is resistanceAs a circuit contains three resistors. So R1 , R2 and R3 would be :
R1 = 10 ΩR2 = 10 ΩR3 = 10 ΩNow,
>> Rs = 10 + 10 + 10
>> Rs = 30 Ω
Therefore,
Option D is correct.The equivalent resistance in the circuit is 30.0 Ω. The correct option is D.
What is Ohm's law?Ohm's law is a fundamental principle of electric circuits that describes the relationship between electric current, voltage, and resistance. It states that the electric current flowing through a conductor between two points is directly proportional to the voltage across the two points, and inversely proportional to the resistance between them.
Mathematically,
V = IR
Where V = is the voltage across the conductor in volts (V),
I = is the electric current flowing through the conductor in amperes (A),
R =is the resistance of the conductor in ohms (Ω).
This relationship can also be expressed in terms of power, using the formula:
P = VI
Where P = is the power in watts (W),
V = is the voltage in volts (V),
I = is the current in amperes (A).
Ohm's law is named after the German physicist Georg Simon Ohm, who first published it in 1827 as a result of his experiments with electric circuits. Ohm's law is widely used in electrical engineering and is essential for understanding and designing electronic devices and circuits.
Here in this question,
The equivalent resistance of resistors in series is the sum of their individual resistances.
Now, the equivalent resistance of three 10.0 Ω resistors connected in series is:
Req = R1 + R2 + R3
Req= 10.0 Ω + 10.0 Ω + 10.0 Ω
Req= 30.0 Ω
Using Ohm's law, we can find the current flowing through the circuit:
I = V/R
= 6.0 V/30.0 Ω
I = 0.2 A
Therefore, the equivalent resistance of the circuit is 30.0 Ω (Option D).
To learn about capacitance click:
https://brainly.com/question/28445252
#SPJ5
Two balls of equal mass collide and stick together as shown in the figure. The initial velocity of ball B is twice that of ball A. a. Calculate the angle above the horizontal of the motion of mass A + B after the collision. b. What is the ratio of the final velocity of the mass A + B to the initial velocity of ball A, /? c. What is the ratio of the final energy of the system to the initial energy of the system, /? Is the collision elastic or inelastic?
The angle above the horizontal of the motion of mass A + B after the collision. as well as others are mathematically given as
[tex]\theta f = 26.3 \deg[/tex]vf/vA= 0.942vf^2 / 5vA^2 = 0.35What is Collison equilibrium?
According to the collision hypothesis of chemistry, chemical reactions happen when two molecules or atoms collide.
Generally, the equation for Collison equilibrium is mathematically given as
For horizontal motion
mvAx+m2vAx = 2mvfx
For vertical motion
-mvAy+m2vAy = 2mvfy
vfy = 1/2 vAy
[tex]\tan \theta f = vfy/vfx \\\\\tan \theta f = 1/3 vAy/vAx \\\\\tan \theta f = vAy/vAx \\\\\theta f = tan-1 ( 1/3 tan (56) )\\\\[/tex]
[tex]\theta f = 26.3 \deg[/tex]
(b)
[tex]v fy = vf sin \theta f\\\\vAy = vA sin theta i\\\\vf/vA = vfy/vAy sin( \theta i)/sin(\theta f)\\\\vf/vA = 1/2 sin(56)/sin(26.3) \\\\[/tex]
vf/vA= 0.94
(c)
[tex]Ef/Ei = \frac{(1/2 * (2m) * (vf)^2) }{ (1/2 * m * (vA)^2) + 1/2*m*(2vA)^2) ]}[/tex]
2vf^2 / 5vA^2 = 0.35
In conclusion, The angle above the horizontal of the motion of mass A + B after the collision. as well as others
[tex]\theta f = 26.3 \deg[/tex]
vf/vA= 0.94
2vf^2 / 5vA^2 = 0.35
Read more about collision theory
https://brainly.com/question/20628781
#SPJ1
An aircraft, initially stationary on a runway, takes off with a speed of 85 km h¹ in a distance of no
more than 1.20 km.
What is the minimum constant acceleration necessary for the aircraft?
A 0.23ms-²
B 0.46ms ²
C 3.0ms ²
D 6.0m
Answer:
A. 0.23 ms⁻²
Explanation:
Using the equation:
v² = u² + 2as
where:
v = final velocity (85 kmh⁻¹ = 85 x 0.278 = 23.6 ms⁻¹)
u = initial velocity (0 ms⁻¹)
a = acceleration (? ms⁻²)
s = displacement (1.20 km = 1.2 x 1000 = 1200 m),
[tex](23.6)^2 = (0)^2 + 2 (a) (1200)[/tex]
⇒ [tex]a = \frac{23.6^2}{2(1200)}[/tex]
⇒ a = 0.23 ms⁻²
Water is being heated in a closed pan on top of a range while being stirred by a paddle wheel.
During the process, 30 kJ of heat is transferred to the water, and 5 kJ of heat is lost to the
surrounding air. The paddle-wheel work amounts to 500 N · m. Determine the final energy of
the system if its initial energy is 10 kJ.
Heat transfer in a closed system is the addition of changes in internal energy and the total amount of work done by it. The final energy of the system is 35.5kJ.
What is heat transfer?Heat transfer is the transfer of heat energy due to temperature differences.
The paddle-wheel paintings are quantities of workdone, 500 N.m or 0.5kJ.
The preliminary (initial) power of the device is 10 kJ.
Total warmness transferred in the course of the method is 30 kJ
Total warmness misplaced in the course of the method to the encompassing air is 5 kJ.
The energy of the system is given as:
The energy of the system = Energy in - Energy out
The energy of the system = Initial energy + Energy transferred + Work done - Energy lost
Energy of the system = 10 + 30 + 0.5 - 5 kJ
Energy of the system = 35.5 kJ
Read more about energy:
https://brainly.com/question/13881533
#SPJ1
Drag each label to the correct location on the table sort the sentences based on weather thy are correct or incorrect
The statement that water boils at a temperature below 100 degrees in a pressure cooker is correct
What is freezing?The term freezing refers to the temperature at which a liquid is turned into a solid.
The following is the sorting of the statements into those that are correct and incorrect.
Water boils at a temperature below 100 degrees at high altitudes - correct
Water expands on freezing - correct
Water contracts on freezing - incorrect
Water boils at a temperature below 100 degrees in a pressure cooker - correct
Water boils at 100 degrees under normal pressure - correct
Learn more about freezing:https://brainly.com/question/3121416?
#SPJ1
If the coefficient of kinetic friction between a 24-kg crate and the floor is 0.25 what horizontal force is required to move the crate at a steady speed across the floor?
The horizontal force required to move the crate at a steady speed across the floor will be 58.86 N.
What is the friction force?
It is a type of opposition force acting on the surface of the body that tries to oppose the motion of the body. its unit is Newton (N).
The given data in the problem is;
Mass,m = 24 kg
The coefficient of kinetic friction, μ=0.25
The friction force is defined as the product of the coefficient of friction and normal reaction.
f=μN
If there is no other force, the horizontal force is equal to the friction force;
F=f
The horizontal force required to move the crate at a steady speed across the floor is found as;
F = μN
The normal reaction force is;
N=W
N=mg
F = μmg
F=0.25 × 24-kg × 9.81 m/s²
F = 58.86 N
Hence horizontal force is required to move the crate at a steady speed across the floor will be 58.86 N.
To learn more about the friction force, refer to the link;
https://brainly.com/question/1714663
#SPJ1
A boat moves through the water with two forces acting on it. One is a 1,800-N forward push by the water on the propeller, and the other is a 1,200-N resistive force due to the water around the bow.
(a) What is the acceleration of the 1,400-kg boat?
0.25
m/s 2
(b) If it starts from rest, how far will the boat move in 20.0 s?
m
(c) What will its velocity be at the end of that time?
m/s
(a)The acceleration of the 1,400-kg boat will be 0.425 m/sec²
(b) If it starts from rest, the distance through which the boat moves in 20.0 s will be 85 m.
(c)Velocity at the end of that time will be 8.5 m/sec.
What is velocity?The change of distance with respect to time is defined as speed. Speed is a scalar quantity. It is a time-based component. Its unit is m/sec.
Given data;
Forwad force acting on the boat,v₁ = 1,800-N
Resistive force acting on the boat,v₂ = 1,200-N
The acceleration of the boat,a
Mass of boat,m = 1,400-kg
Initial velocity of boat,u= 0 m/sec
Distance travelled by boat,S = ?
Time for the boat travels,t = 20.0 s
Final velocity,V = ? m/sec
The net force on the boat;
F = F₁ - F₂
F = 1800 N - 1200 N
F = 600 N
From the defination of force;
F= ma
a = F / m
a = 600 N / 1400 kg
a = 0.425 m/sec²
b)
The distance through which the boat moves is 20.0 s;
[tex]\rm x_f = x_ 0 + v_0 t + \frac{1}{2} at^2 \\\\ x_f = \frac{1}{2}at^2 \\\\ x_f = 0+0 + \frac{1}{2} at^2 \\\\ x_f = \frac{1}{2}\times 0.425 \times (20 )^ 2 \\\\ x_f = 85 \ m[/tex]
c)
The velocity at the end of that time is found as;
[tex]\rm v_f = v_ 0 + at \\\\ v_f =- 0+ at \\\\ v_f = 8.5[/tex] m/sec
Hence the acceleration of the boat, the distance through which the boat moves in 20.0 s, and velocity at the end of that time will be 0.425 m/sec²,85 m, and 8.5 m/sec.
To learn more about the velocity, refer to the link: https://brainly.com/question/862972
#SPJ1
A person walks first at a constant speed of 5.00 m.s-1
along a straight line from point A to
point B and then back along the line from B to A at a constant speed of 3.00 m.s-1
.
(a) Calculate her average speed over the entire trip.
The average speed of the person over the entire trip is 3.75 m/s.
Average speed of the personAverage speed = total distance/total time
Average speed = (d + d)/(d/Va + d/Vb)
where;
d is the distance in a single tripVa is speed from point AVb is the speed from point BAverage speed = (2Vavb)/(Va + Vb)
Average speed = (2 x 5 x 3)/(5 + 3)
Average speed = 3.75 m/s
Thus, the average speed of the person over the entire trip is 3.75 m/s.
Learn more about average speed here: https://brainly.com/question/6504879
#SPJ1
a 600 g pool ball moving at 2.0m/s hits a second pool of the same mass at rest. the first ball moves off at 1.5m/s at an angle of 30 degrees from the original direction. assume the surface of the pool table to b frictionless find the angle at which the second ball moves off and the speed of the second ball after impact.
The speed of the second ball after impact is 1.43 m/s at 60.8⁰.
Speed of the second ballApply the principle of conservation of linear momentum;
in y direction0.6(2) = 0.6(1.5 sin30) + 0.6(vy)
1.2 = 0.45 + 0.6vy
0.6vy = 0.75
vy = 0.75/0.6
vy = 1.25 m/s
in x direction0.6(2) = 0.6(1.5 cos30) + 0.6(vx)
1.2 = 0.78 + 0.6vx
0.6vx = 0.42
vx = 0.42/0.6
vx = 0.7 m/s
Resultant speedv = √(vy² + vx²)
v = √(1.25² + 0.7²)
v = 1.43 m/s
Direction of second massθ = arc tan(vy/vx)
θ = arc tan (1.25/0.7)
θ = 60.8⁰
Thus, the speed of the second ball after impact is 1.43 m/s at 60.8⁰.
Learn more about speed after impact here: https://brainly.com/question/21208349
#SPJ1
How much time is required for a sound to travel 1 mile (5,280.0 ft) if the air temperature is 0°C?
The time is required for a sound to travel 1 mile (5,280.0 ft) if the air temperature is 0°C is 4.85 sec.
What is velocity?Velocity is largely a vector quantity. It is the fee of alternate distance. The speed of an item transferring can by no means be negative. The pace of a transferring item may be zero.
The velocity of sound waves at zero degrees Celsius is 1087 ft/sec.
Velocity = Distance/Time
Time= Distance/Velocity
The distance to be traveled by sound is 5280 ft
The velocity of sound is 1087 ft/sec
Time = 5280 ft/ 1087 ft/sec
Time = 4.85 sec.
The time required by sound to travel 1 mile at zero degrees Celsius is 4.85 sec.
Read more about the velocity :
https://brainly.com/question/25749514
#SPJ1
How is Behaviorism and Psychoanalysis theories are different?
Answer:
Behaviorists give prominence to the external behavior of individuals and believe that behavior is a response to external stimuli. On the other hand, psychoanalysis emphasizes the centrality of the human mind. They believe that the unconscious has the potential to motivate behavior.
Explanation:
Answer: Behaviorists give prominence to the external behavior of individuals and believe that behavior is a response to external stimuli. On the other hand, psychoanalysis emphasizes the centrality of the human mind. They believe that the unconscious has the potential to motivate behavior.
Explanation:
Animals change their feature according to their environment
What is the force between two balloons with a negative charge of 1.6 × 10−10 C if the balloons are 0.05 m apart?
Considering the Coulomb's Law, the force between the two ballons is 9.216×10⁻⁸ N.
Coulomb's LawCharged bodies experience a force of attraction or repulsion on approach.
From Coulomb's Law it is possible to predict what the electrostatic force of attraction or repulsion between two particles will be according to their electric charge and the distance between them.
From Coulomb's Law, the electric force with which two point charges at rest attract or repel each other is directly proportional to the product of the magnitude of both charges and inversely proportional to the square of the distance that separates them:
[tex]F=k\frac{Qq}{d^{2} }[/tex]
where:
F is the electrical force of attraction or repulsion. It is measured in Newtons (N).Q and q are the values of the two point charges. They are measured in Coulombs (C).d is the value of the distance that separates them. It is measured in meters (m).K is a constant of proportionality called the Coulomb's law constant. It depends on the medium in which the charges are located. Specifically for vacuum k is approximately 9×10⁹ [tex]\frac{Nm^{2} }{C^{2} }[/tex].The force is attractive if the charges are of opposite sign and repulsive if they are of the same sign.
Force between two balloonsIn this case, you know that two balloons have a negative charge of 1.6×10⁻¹⁰ C and the balloons are 0.05 m apart.
Replacing in the Coulomb's Law, you get:
[tex]F=9x10^{9} \frac{Nm^{2} }{C^{2} } \frac{(-1.6x10^{-10} C)x(-1.6x10^{-10} C)}{(0.05 m)^{2} }[/tex]
Solving:
[tex]F=9x10^{9} \frac{Nm^{2} }{C^{2} } \frac{2.56x10^{-20} C^{2} }{(0.05 m)^{2} }[/tex]
[tex]F=9x10^{9} \frac{Nm^{2} }{C^{2} } 1.024x10^{-17}\frac{ C^{2} }{m^{2} }[/tex]
F= 9.216×10⁻⁸ N
Finally, the force between the two ballons is 9.216×10⁻⁸ N.
Learn more about Coulomb's Law:
brainly.com/question/26892767
#SPJ1
By what percent does the braking distance of a car decrease, when the speed of the car is reduced by 10.3 percent? Braking distance is the distance a car travels from the point when the brakes are applied to when the car comes to a complete stop. (Hint: the answer is not 10.3 percent)
The percent of the braking distance is mathematically given as
P=91.5128%
What percent does the braking distance of a car decrease, when the speed of the car is reduced by 10.3 percent?Generally, the equation for is mathematically given as
V^2=U^2+2as
Therefore
V^2=u^2+2(-a)s
[tex]s=\frac{u^2}{-2a}[/tex]
Hence.
u'=u-u×0.103
u'=0.206u
v^2=u^2+2as
0=(0.206)^2+2(-a)s'
Hence
[tex]s'=\frac{0.042436u^2}{a}[/tex]
In conclusion,The reduction percentage is
[tex]P=\frac{s-s'}{s}*100\\\\P=\frac{(\frac{u^2}{-2a})-(\frac{0.042436u^2}{a} )}{ \frac{u^}{-2a}}*100\\\\P=\frac{(0.5-0.042436 )}{ 0.5}*100[/tex]
P=91.5128%
Read more about distance
https://brainly.com/question/15172156
#SPJ1
The speed of a bus is reduced uniformly from 20 m/s to 10 m/s while traveling 60 m. (a)
Compute the acceleration. (b) How much farther will the bus travel before coming to rest,
provided the acceleration remains constant? (c) Draw a diagram showing the motion from start to
finish of the bus.
The bus will travel a further 20 m before coming to rest.
What is acceleration?The term acceleration has to do with a change in velocity with time. Now we have;
u = 20 m/s
v = 10 m/s
s = 60 m
Now;
v^2 = u^2 -2as
v^2 - u^2 = -2as
(10)^2 - (20)^2 = - 2 * a * 60
a = (10)^2 - (20)^2/ - 2 * 60
a = 100 - 400/ - 2 * 60
a = 2.5 m/s^2
At that time;
v = 0 m/s
u = 20 m/s
a = 2.5 m/s^2
s = ?
Hence;
u^2 = 2as
s = u^2/2a
s = (20)^2/ 2 * 2.5
s = 400/5
s = 80 m
Hence, the bus will travel a further 20 m before coming to rest.
Learn more about acceleration:https://brainly.com/question/12550364
#SPJ1
During the 2020 general election, GOP incumbent Donald Trump is once again successful in his bid for the presidency. Mr. Trump amasses 307 electoral votes compared to the 231 electoral votes Beto O'Rourke, the Democratic candidate, received. Following a selective state recount of the presidential election results, poll workers discover that Green Party Candidate Jill Stein actually won the popular vote in Pennsylvania, Michigan and Wisconsin, resulting in a deduction of 47 electoral votes from the GOP incumbent Donald Trump’s total. As a result of the deduction Mr. Trump now possesses 260 electoral votes. The recount also reveals a loss of two electoral votes to O'Rourke due to the non-votes by two faithless electors in Florida. O'Rourke’s final number now rests at 229 electoral votes. What would be the next step(s) in deciding which candidate becomes the next President of the United States?
The election would be given to the members of the House of Representatives who would be able to select either O'Rourke, or Trump only, because they were the only candidates who received more than 15% of the available electoral votes.
What is the role of house of representative?The house of representatives are those that has been given the authority to make and pass federal laws.
They are supposed to handle and mischief during elections that may affect the process on order to ascertain the rightful leader.
From the excerpt given, since a recount of the votes where made and the three parties involved had a miscount, the final decision should be made by the house of representatives.
This is because, the house of representatives has the authority to elect the president from the three presidential candidates that received the highest votes.
Learn more about election here:
https://brainly.com/question/25815264
#SPJ1
Discuss how oxygen is used in spacecraft in at least 2 paragraphs.
Oxygen is used in spacecraft by the persons for respiration.
Why do spaceships need oxygen?Rocket engines carry oxygen gas for combustion because combustion need oxygen. Rockets carry an liquid oxygen up to space with them as a fuel.
Astronauts sealed in a spacecraft that need a continuous supply of oxygen for respiration. Without this oxygen, no person can survive in the spacecraft.
So we can conclude that oxygen is used in spacecraft by the persons for respiration.
Learn more about oxygen here: https://brainly.com/question/26073928
#SPJ1
Oxygen is required in spacecrafts for the following:
Oxygen is mixed with fuel to power the engines,Oxygen is used in pressurized spacesuits for breathing.What is the importance of oxygen in spacecraft?Spacecraft refers to vehicles which are used to travel to space.
In space, their is little or no oxygen. Thus oxygen is used in the following ways:
Oxygen is mixed with fuel to power the engines,Oxygen is used in pressurized spacesuits for breathing.In conclusion, oxygen is important for combustion of fuel of the spacecraft engines as well as for breathing by the astronauts.
Learn more about oxygen at:
#SPJ1
a metal ion (x) with a charge of 3= is attracted to a normal ion (z) with a charge of 4- which of these formulas represents the resulting comppound
If the metal ion has a 3+ charge and the nonmetal ion has a 4- charge, the formula of the compound is X4Z3.
What is the formula of a compound?The formula of an ionic compound is determined by the charges of the ions that make up the compound. Recall that when the compound is formed, the ions exchange valences.
Hence, is the metal ion has a 3+ charge and the nonmetal ion has a 4- charge, the formula of the compound is X4Z3.
Missing parts:
A metal ion (X) with a charge of 3+ is attracted to a nonmetal ion (Z) with a charge of 4-. Which of these formulas represents the resulting compound.
A. 7XZ
B. X3Z4
C. X4Z3
D. 4X3Z
Learn more about ionic compounds:https://brainly.com/question/9167977
#SPJ1
A Skier starting from rest rolls down a 35.0 m ramp. When he arrives at the bottom of the ramp his speed is 10.43 m/s. (a) Determine the magnitude of his acceleration, assumed to be constant, (b) If the ramp is inclined at 60.0 degrees with respect to the ground, what is the component of his acceleration that is parallel to the ground. (c) Provide me with a free body diagram, one for the 35 m ramp situation. Also, provide a nice sketch of the skier.
We obtain the magnitude of the acceleration as 1.55 m/s^2 while its component parallel to the ground is 0.775 m/s^2.
What is acceleration?The acceleration refers to change of speed with time. From the question;
distance covered = 35.0 m final velocity = 10.43 m/sIt the follows that;
v^2 = u^2 + 2as
And;
u = 0m/s owing to the fact that motion started from rest
v^2 = 2as
a = v^2/2s
a = (10.43 m/s)^2/2 * 35.0 m
a = 1.55 m/s^2
For the acceleration component which is parallel to the ground;
ax = a sin θ
ax = 1.55 m/s^2 cos 60
ax = 0.775 m/s^2
Learn more about acceleration: brainly.com/question/12550364
#SPJ1
A uniform rod with a mass of m = 1.94 kg and a length of l = 2.10 m is attached to a horizontal surface with a hin ge. The rod can rotate around the hin ge without friction.
Initially the rod is held at rest at an angle of θ = 70.4° with respect to the horizontal surface. Then the rod is released.
1. What is the angular speed of the rod, when it lands on the horizontal surface?
2. What is the angular acceleration of the rod, just before it touches the horizontal surface?
Hello!
1.
To solve, we can use the work-energy theorem.
Initially, the rod is at rest. Its center of mass is some height above the surface, so it contains gravitational potential energy.
Finally, the rod has rotational kinetic energy.
To find the initial energy, we have to find where the center of mass is. It is located at the midpoint of the rod, or l/2. To find its height above, though, we have to find its sine component with respect to the angle:
[tex]E_i = mg{\frac{l}{2}}}sin(\theta)[/tex]
Its final energy:
[tex]E_f = \frac{1}{2}I\omega^2[/tex]
About the pivot point, a rod's moment of inertia (I) is 1/3ml².
[tex]E_f = \frac{1}{2}(\frac{1}{3}ml^2) = \frac{1}{6}ml^2\omega^2[/tex]
Now, solving for angular speed:
[tex]E_i = E_f\\\\mg\frac{l}{2}sin\theta = \frac{1}{6}ml^2 \omega^2\\\\3gsin\theta = l\omega^2 \\\\\omega = \sqrt{\frac{3gsin\theta}{l}}[/tex]
Plugging in the values and solving:
[tex]\omega = \sqrt{\frac{3(9.8)sin(70.4)}{2.1}} = \boxed{3.63 rad/s}[/tex]
2.
Let's determine where to place our pivot point. To minimize the number of torques to take into account, let's put the pivot point at the base of the rod.
Now, the only torque we must consider is that produced by the force of gravity.
Recall the equation for torque:
[tex]\tau = r \times F[/tex]
This is a cross-product, where 'r' is the lever arm of the force. This is the perpendicular distance between the line of action of the force and the pivot point.
In this instance, based on our reference angle, this would be the COSINE.
[tex]\tau = rFcos\theta[/tex]
r = distance from pivot point to center of the rod (1.05 m)
F = Force of gravity, mg (19.03 N)
θ = angle of rod from horizontal
Using the rotational equivalent of Newton's Second Law:
[tex]I\alpha = rFcos\theta[/tex]
'I' is the rod's moment of inertia about the pivot point. For a uniform rod, its moment of inertia at its end is 1/3ml².
Therefore:
[tex]I = \frac{1}{3}(1.94)(2.1^2) = 2.85 kgm^2[/tex]
Now, we can solve for the function for angular acceleration.
[tex]\alpha(\theta) = \frac{rF}{I}cos\theta\\\\\alpha(\theta) = \frac{(1.05)(19.03)}{2.85}cos\theta = 7cos\theta[/tex]
This is the angular acceleration of the rod as a function of theta.
Substituting in θ = 0°:
[tex]\alpha(0) = 7cos(0) = \boxed{7 rad/s^2}[/tex]
**Note, we couldn't just use rotational kinematics because the angular acceleration is NOT constant.
How do hydrogen bonds affect boiling points?
Boiling points are raised by hydrogen bonds because they make different molecules desire to "attach" to one another, which requires more energy to do so. In water, for instance, the hydrogen proton is in a state that resembles ionization because the connections between oxygen and hydrogen, while covalent, are strongly polar. The oxygen also receives a partial negative charge. Therefore, hydrogen bonds are formed when the electro-positive H in one molecule is strongly electrostatically attracted to the electro-negative O in nearby molecules. Despite being weak links, they are powerful enough to significantly alter the liquid's characteristics.
Thanks!
>> ROR
How much did mary pay in social securty taxes
The amount that Mary will pay in social security taxes will be $1550.
How to compute the value?It should be noted that the current tax for the social security is 6.2% for the employer and 6.2% for the employee.
In this case, let's assume that the income for Mary is $25000, the amount that Mary will pay will be:
= 6.2% × $25000
= 0.062 × $25000
= $1550
Learn more social security taxes on:
brainly.com/question/1899088
#SPJ1
A block of mass M=10 kg is on a frictionless surface as shown in the photo attached. And it's attached to a wall by two springs of the same constant K= 250 N/m, then the block is pulled a distance A and released. What's the speed V and angular velocity w of the block as it passes through the equilibrium when the two springs are arranged in:
a) parallel
b) series
a.
i. the speed of the block of mass when the springs are connected in parallel is 7.07 A m/sii. the angular velocity when the two springs are in parallel is 7.07 rad/sb.
i. the speed of the block of mass when the springs are connected in series is 11.2 A m/sii. the angular velocity when the two springs are in series is 11.2 rad/sa. i. How to calculate the velocity of the mass when the springs are connected in parallel?Since k is the spring constant of both springs = 250 N/m. The equivalent spring constant in parallel is k' = k + k
= 2k
= 2 × 250 N/m
= 500 N/m
Now since A is the maximum distance the block is pulled from its equilibrium position, the total energy of the block is E = 1/2kA
Also, 1/2k'A² = 1/2k'x² + 1/2Mv² where
k' = equivalent spring constant in parallel = 500 N/m, A = maximum displacement of spring, x = equilibrium position = 0 m, M = mass of block = 10 kg and v = speed of block at equilibrium positionMaking v subject of the formula, we have
v = √[k'(A² - x²)/M]
Substituting the values of the variables into the equation, we have
v = √[k'(A² - x²)/M]
v = √[500 N/m(A² - (0)²)/10]
v = √[50 N/m(A² - 0)]
v = [√50]A m/s
v = [5√2] A m/s
v = 7.07 A m/s
So, the speed of the block of mass when the springs are connected in parallel is 7.07 A m/s
ii. The angular velocity of mass when the springs are in parallel
Since velocity of spring v = ω√(A² - x²) where
ω = angular velocity of spring, A = maximum displacement of spring and x = equilbrium position of spring = 0 mMaking ω subject of the formula, we have
ω = v/√(A² - x²)
Since v = 7.07 A m/s
Substituting the values of the other variables into the equation, we have
ω = v/√(A² - x²)
ω = 7.07 A m/s/√(A² - 0²)
ω = 7.07 A m/s/√(A² - 0)
ω = 7.07 A m/s/√A²
ω = 7.07 A m/s/A m
ω = 7.07 rad/s
So, the angular velocity when the two springs are in parallel is 7.07 rad/s
b. i. How to calculate the velocity of the mass when the springs are connected in series?Since k is the spring constant of both springs = 250 N/m. The equivalent spring constant in parallel is 1/k" = 1/k + 1/k
= 2/k
⇒ k" = k/2
k" = 250 N/m ÷ 2
= 125 N/m
Now since A is the maximum distance the block is pulled from its equilibrium position, the total energy of the block is E = 1/2kA
Also, 1/2k"A² = 1/2k"x² + 1/2Mv'² where
k" = equivalent spring constant in series = 125 N/m, A = maximum displacement of spring, x = equilibrium position = 0 m, M = mass of block = 10 kg and v' = speed of block at equilibrium positionMaking v subject of the formula, we have
v = √[k"(A² - x²)/M]
Substituting the values of the variables into the equation, we have
v = √[k"(A² - x²)/M]
v = √[125 N/m(A² - (0)²)/10]
v = √[125 N/m(A² - 0)]
v = [√125]A m/s
v = [5√5] A m/s
v = 11.2 A m/s
So, the speed of the block of mass when the springs are connected in series is 11.2 A m/s
ii. The angular velocity of the mass when the springs are in series
Since velocity of spring v = ω√(A² - x²) where
ω = angular velocity of spring, A = maximum displacement of spring and x = equilbrium position of spring = 0 mMaking ω subject of the formula, we have
ω = v/√(A² - x²)
Since v = 11.2 A m/s
Substituting the values of the other variables into the equation, we have
ω = v/√(A² - x²)
ω = 11.2 A m/s/√(A² - 0²)
ω = 11.2 A m/s/√(A² - 0)
ω = 11.2 A m/s/√A²
ω = 11.2 A m/s/A m
ω = 11.2 rad/s
So, the angular velocity when the two springs are in series is 11.2 rad/s
Learn more about speed of block of mass here:
https://brainly.com/question/21521118
#SPJ1
A charge of 5.4 C experiences a force of 25.0 in an electric field. What is the strength of electric field at that point ? If the 5.4 C is replaced by a charge of half the magnitude, 2.7 C, how much force would this charge experience at that point ? Remember to identity all of your data, write the equation, and show your work. (5 points)
The strength of the electric field at that point and the force would this charge experiences at that point will be 4.587 N/C and 12.38 N.
What is the electric field strength?The electric field strength is defined as the ratio of electric force to charge.
Given data;
q₁ = 5.4 C
F₁ is the electric force in case1
E is the electric field =?
F₂ is the electric force in case 2
q₂ is the charge 2
The strength of the electric field at that point is;
F₁=Eq₁
E₁=F/q₁
E₁=25.0 N / 5.4 C
E₁=4.587 N/C
The force would this charge experience at that point when the charge is 2.7 C;
F₂=Eq₂
F₂=4.587 N/C × 2.7 C
F₂ = 12.38 N
Hence the strength of the electric field at that point and the force would this charge experiences at that point will be 4.587 N/C and 12.38 N.
To learn more about the electric field strength, refer to the link;
https://brainly.com/question/4264413
#SPJ1
A car moves with an average speed of 75 kmh^-1 from town P to town Q in 2 hours. By using information, you may calculate the distance between two towns. state a derived quantity and its S.I unit
Answer:
patron
Explanation:
The patron is something or someone who defends some cause or point of view. In the art field, for example, the patron may be considered a sponsor, that is, someone who is known for defending a particular group of people or specific situation.
The patron is one who advocates, advises and directs. In the military, patrons are heroic figures who are chosen to defend a military unit, for example.
Explanation:
patron
Explanation:
The patron is something or someone who defends some cause or point of view. In the art field, for example, the patron may be considered a sponsor, that is, someone who is known for defending a particular group of people or specific situation.
The patron is one who advocates, advises and directs. In the military, patrons are heroic figures who are chosen to defend a military unit, for example.