Answer:
B= 34.6 m/s
C= 49 m/s
D= 28.3 m/s
the gravitational force produced between any two
objects kept at 2.5*10^km apart is 580N. at what distance
should they be kept so that the gravitational force becomes
half?
Answer:
The two objects should be kept at a distance of [tex]3.535\times 10^{4}[/tex] kilometers.
Explanation:
From Newton's Law of Gravitation, gravitational force ([tex]F[/tex]), measured in newtons, between two objects is inversely proportional to the square of distance ([tex]r[/tex]), measured in meters. That is:
[tex]F \propto \frac{1}{r^{2}}[/tex] (1)
[tex]F = \frac{k}{r^{2}}[/tex] (2)
Where [tex]k[/tex] is the proportionality ratio, measured in newtons-square meter.
Now we eliminate the proportionality by constructing the following relationship:
[tex]\frac{F_{2}}{F_{1}} = \left(\frac{r_{1}}{r_{2}}\right)^{2}[/tex] (3)
If we know that [tex]\frac{F_{2}}{F_{1}} = \frac{1}{2}[/tex] and [tex]r_{1} = 2.5\times 10^{7}\,m[/tex], then the distance between the two objects so that gravitational force becomes half is:
[tex]\frac{1}{2} = \frac{(2.5\times 10^{7}\,m)^{2}}{r_{2}^{2}}[/tex]
[tex]r_{2}^{2} = 1.25\times 10^{15}\,m^{2}[/tex]
[tex]r_{2} = 3.535\times 10^{7}\,m[/tex]
[tex]r_{2} = 3.535\times 10^{4}\,km[/tex]
The two objects should be kept at a distance of [tex]3.535\times 10^{4}[/tex] kilometers.
What are the factors of works?
Answer:
Explanation:
The seven factors are work load, family life, transportation, compensation policy and benefits, colleagues and supervisor, working environment and working condition and career growth.
1. Find the momentum of an object of mass 5 kg with a velocity of 2 m/s. *
a. 2.5 kg.m/s
O b. 10 kg.m/s
c. 0.25 kg.m/s
d. 20 kg.m/s
Answer:
10kgm/s
Explanation:
Momentum = Mass * Velocity (both in standard units)
Momentum = 5 * 2 = 10kgm/s
What is the acceleration of a 19 kg bike pushed with a force of 340 N? F = ma
A) 6460 m/s
B) 18 m/s2
C) 17.6 m/s2
Answer:
C
Explanation:
A. A person does 5415J of work in 4.5 minutes, how much power, expressed in watts, rounded to the tenths place, was generated?
B. Calculate the potential energy of an object whose mass is 56.90kg when dropped from a height of 2150.cm. Round your answer to the nearest tens place.
C. Calculate the kinetic energy of an object with a mass of 355g moving at a velocity of 7.73 m/s. Round your answer to the nearest tenths place.
D. What is the total energy of a system with KE = 1368 J and a PE = 5782J? Express your answer in kJ.
Answer: I only have the answer for A, but still, the answer is 20.07.
Explanation: Because the number ends in a 15, round to the nearest tenth which is 20. So now the number is 5420. To get the Watts (W) you have to take 5420 and divide it by the time in seconds. 4.5 minutes in seconds is 270, so 5420 divided by 270 equals 20.07. So 20.07 is the answer.The specific heat capacity of oxygen is 918 J/kg °C. That means that it takes 918 J of energy to raise _____ kg of oxygen by 1°C. What number completes the sentence?
Answer:
In this case, the specific heat capacity of oxygen is 918 J/kg °C. That means that it takes 918 J of energy to raise 1 kg of oxygen by 1°C.
Explanation:
Specific heat is the amount of heat required to raise the temperature of a unit mass of a substance by one degree. Specific heat is also known as specific heat capacity or specific heat capacity.
In other words, it is defined as the amount of energy that we must contribute to increase its temperature.
The specific heat or heat capacity of a certain body is called by the letter "c".
The expression to calculate the specific heat of a substance is:
c = Q / m.Δt
where Q represents the heat energy transfer between the system and its environment, m the mass of the system and Δt the temperature variation to which it is subjected.
In this case, the specific heat capacity of oxygen is 918 J/kg °C. That means that it takes 918 J of energy to raise 1 kg of oxygen by 1°C.
The number that completes the sentence is 1 kg
What is specific heat capacity?Specific heat capacity is the amount of heat required to raise 1kg of the substance by 1 °C or 1 K. The S.I unit of specific heat capacity is J/kg°C
The substance in question is oxygen.
From the question,
If the specific heat capacity of oxygen is 918 J/kg°C, It means that it takes 918 J of energy to raise 1 kg of oxygen by 1°C.
Hence, The number that completes the sentence is 1 kg.
Learn more about specific heat capacity here: https://brainly.com/question/21406849
HELP PLEASE I NEED AN A FOR THIS TO PASS
Answer:
D: The velocity increases during the time periods labeled A and C
Explanation:
Since gravity pulls us down to Earth, it will pull down the ball faster when the ball is falling.
The athlete at point A runs 150m east, then 70m west and then 100m east. Determine the resultant displacement of the athlete relative to point A
Answer:
180m to the east
Explanation:
Displacement is the distance traveled in a specific direction. It is a vector quantity with both magnitude and direction. Therefore, the start and finish position is very paramount.
point A runs 150m east,
70m west
100m east
150m
--------------------------------------------------------→
70m
←---------------------
100m
-----------------------------------→
The displacement of the athlete = 150 - 80 + 100 = 180m to the east
According to the question,
Point A runs:
150 m (east)70 m (west)100 m (east)Now,
The displacement will be:
= [tex]150-80+100[/tex]
= [tex]250-80[/tex]
= [tex]170 \ m \ (east)[/tex]
Thus the answer above is correct.
Learn more about displacement here:
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Plz help 200 pts
In the movie Black Panther, Wakanda's economy focuses on the production and use of a fictional metal known as vibranium, which has amazing chemical and physical properties. If this metal actually existed, where do you think the metal would be placed in the periodic table? What would be the elemental symbol?
Answer:
We just know that the metal is called Vibranium.
to place something is the table we need to know its atomic number and its mass. so if we can get that we can ans it.
Explanation:
HELP PLS 100 POINTS TAKING TEST RN
WHEN you look at the speedometer in a moving car, you can see the car's.
A.instantaneous speed.
B.average speed.
C.instantaneous acceleration.
D.average acceleration.
E.average distance traveled.?
Answer:
I think he answer is C but I could be wrong
Explanation:
brainliest plz
Answer:
d mark brainlyest
Explanation:
What acceleration is produced by a force of 250 N acting on a mas
25 kg?
Answer:
10m/s2
Explanation:
f=ma
f/m= a
or,250/25=a
or,10 = a
therfore, acceleration is produced 10m/s2
What was the long-term effect of the Northwest Ordinance of 1787?
Answer:
Established a government for the Northwest Territory, outlined the process for admitting a new state to the Union, and guaranteed that newly created states would be equal to the original thirteen states
Explanation:
Goooogle, so I hope this helps somewhat
Also, isn't this a History question? You put physics lol
In 2010, scientists obtained an image of an asteroid that was dangerously close to Earth. Which technology did the scientists likely use to capture the image?
GPS, because it uses satellites that provide position and velocity data
radio telescope, because it captures radio waves from space
MRI, because it uses magnets to produce a picture
submarine communication, because it uses LF radio waves
Answer:
radio telescope, because it captures radio waves from space
Explanation:
The technology the scientists used to capture the image is likely to be a radio telescope. This telescope is able to produce images from electrical signals transmitted by the radio waves the trail of the asteroid generates.
Telescope are used to study very far and distant bodies. So, due to their special design, it is the best instrument to use for this kind of study. The radio telescope picks radio waves produced from astronomical bodies in space.Answer:
radio telescope, because it captures radio waves from space
Explanation:
Edge 2021
A 58 kg counterweight on a trebuchet is raised to a height of 3.1 meters. Calculate how much potential energy it has
Answer:
1762.04J
Explanation:
Given parameters:
Mass of counterweight = 58kg
Height = 3.1m
Unknown:
Amount of potential energy = ?
Solution:
The potential energy of a body is the energy due to the position of the body.
It is given as:
Potential energy = mass x acceleration due to gravity x height
So;
Potential energy = 58 x 9.8 x 3.1 = 1762.04J
someone help me! you get 27 points if you get it right
Answer:
1. D
2. D
3. A
The reason why your body goes right and the car car goes left is because your body tries to stay where it was, which is on the right. Your upper body doesn't feel a force and because of that continues in the same direction. Your lower half is pulled out from under you by seat friction to the left, leaving you leaning to the right.
HELPPPPP it’s due in 10 minutes
The structural layer of the sun are shown in the cross-sectional diagram.
which layer represents the chromosphere?
A. c
B. d
C. e
D. f
Answer:
A.c
Explanation:
The chromosphere is above the photosphere, the visible "surface" of the Sun. It lies below the solar corona, the Sun's upper atmosphere, which extends many thousands of kilometers above the chromosphere into space. The plasma (electrically charged gas) in the chromosphere has a very low density.
In basic terms it is the 2nd one out from the core.
Answer: It’s probably A.c. The guy above did a bit too much to explain. lol
Explanation:
Which electromagnetic waves have the shortest wavelength and the highest frequency?
waves
Answer: Gamma rays (violet) have the shortest wavelengths and the highest frequencies.
Explanation: The wavelength of the gamma rays is less than 0.01 nanometers. The frequency of a wave is inversely proportional to its wavelength. That means that waves with a high frequency have a short wavelength, while waves with a low frequency have a longer wavelength.
The electromagnetic waves have the shortest wavelength and the highest frequency is Gamma rays (violet).
What are gamma rays?Gamma radiation, from gamma rays (γ), is a type of electromagnetic radiation usually produced by radioactive elements. Gamma rays, due to their high energy, are able to penetrate matter more deeply than alpha or beta radiation.
Gamma ray is a type of high frequency electromagnetic radiation usually produced by radioactive elements.
See more about Gamma rays at brainly.com/question/23281551
Which of the following is not necessary for the creation of fossil fuels?
A. Organic matter
B Heat
C Pressure
D. Wind
m
Bcth drives cast at 30 , then slows to a stop at the red light. A graph of her velocity over time is shown below,
s
where castward is the positive velocity direction.
Velocity
30
A
20+
10+
MY
Pro
2
4
6
8
10
Time (s)
Pro
Теа
Which graph shows her acceleration over time?
Choose1
Answer:
question is not clear.......
During the previous year, Zach's weather station measured 0.8 yards of rain. Express this amount in cm.
Answer:
73.152cm
Explanation:
We have been given:
0.8yards of rain
Problem, convert to cm = ?
Solution:
The problem deals with the conversion from one length dimension to another.
So:
1 yard = 91.44 cm
So 0.8 yards = 0.8 x 9.44 = 73.152cm
The solution to this problem is 73.152cm
Your attitude has no influence on how regularly you exercise.
Answer:
False
Explanation:
Answer: False
Explanation:
correct on edge✅
is it possible for an object to be in motion without any external force applied? justify
Determine the change in velocity between 2.0 to 6.0 seconds. ____
Group of answer choices
-1.6 m/s
-2.1 m/s
-9.5 m/s
Answer:
-2.1 m/seconds velocity
2. If a spring has a spring constant of 400 N/m, how much elastic potential
energy is stored when the spring is stretched by 0.25 m?
Answer:
The kinetic energy of a spring is equal to its elastic potential energy.
The elastic potential energy is 12.5N-m or 12.5 Joules.
Explanation:
[tex] = \frac{1}{2} k {x}^{2} \\ = \frac{1}{2} (400)( {.25)}^{2} \\ = 12.5[/tex]
Calculate the horizontal force that must be applied to a 1,300 kg vehicle to give it an acceleration of 2.6 m/s² on a level road.
500 N
3,380 N
1,302.6 N
0.002 N
The horizontal force must be applied to a vehicle of mass 1300 kg and of acceleration of 2.6 m/s² will be 3380 N. Hence, option B is correct.
What is Acceleration?The rate of change in an object's velocity concerning time is known as acceleration in mechanics. The vector quantity of accelerations. The direction of the net force that is acting on an object determines its acceleration.
Since acceleration has both a magnitude and a direction, it is a vector quantity. Velocity is a vector quantity as well.
According to the question, the given values are :
Mass, m = 1300 kg
Acceleration, a = 2.6 m/s²
Force = 1300 × 2.6 m/s²
F = 3380 N.
So, the force applied will be, 3380 N.
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2. A sled with no initial velocity accelerates at a rate of 1.1 m/s down a hill. How
long does it take the sled to go 13 m to the bottom?
Answer:
Time, t = 4.862 seconds
Explanation:
Given the following data;
Initial velocity = 0
Acceleration = 1.1m/s²
Distance = 13m
To find the time, we would use the second equation of motion;
S = ut + ½at²
Substituting into the equation, we have;
13 = 0*t + ½*1.1*t²
13 = 0.55t²
t² = 13/0.55
t² = 23.64
Taking the square root of both sides, we have;
Time, t = 4.862 seconds
How much force is needed to accelerate a 70 kg rider and her 200 kg
motor scooter at 4 m/s/s? (Include measurement label) *
Answer: f= mass×acceleration
They said t1he scooter so 200× 4
=800N
Explanation:
I am not that sure
hello I wanna know what is the Newton first is also called the law
Answer:
What is another name for the first law of motion? Why is it given that name? Law of inertia. Page 2. It is given that name because inertia is the tendency of an object to resist any change in its motion until an unbalanced force acts on it.
Explanation:
A monkey increases its gravitational potential energy by climbing to the top of a tree. What happens to that potential energy if he climbs back down halfway?
Group of answer choices
It would decrease by three fourths.
It would double.
It would remain the same.
It would decrease by half.
Answer:
it would decrease by half.
Explanation:
14. Skeletal muscles always work in
what
Answer:
ur mom fr tho it does everywhere also in the nose thighs gutes and your whole body
Explanation: