During a race, a sprinter accelerated 1.8 m/s 2 in 2.5 seconds. The sprint increase with this amount of acceleration by 4.5 m/s.
What is acceleration?Acceleration is the time rate of change of velocity.
Acceleration a = velocity v / time t
1.8 = v/2.5
v = 4.5 m/s
The sprint increase with this amount of acceleration by 4.5 m/s.
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A tourist, who weighs 805 N, is walking through the woods and crosses a small horizontal bridge. The bridge rests on two concrete supports, one at each end. He stops one-fourth of the way along the bridge. Assume that the board of the bridge has negligible weight. What is the magnitude of the vertical force that a concrete support exerts on the bridge at the far end?
The magnitude of the vertical force that a concrete support exerts on the bridge at the far end is 201.25 N.
What is force?The force is an action of push or pull which makes a body to move or stop.
Given is the weight of tourist W = 805 N and L is the length of the bridge.
Let the reaction force at both the ends of the bridge is R1 and R2.
Taking the moments about point A,
R1 x 0 - W x L/4 +R2 x L =0
R2 = W/4
R2 = 805 /4
R2 = 201.25 N
Thus, the magnitude of the vertical force that a concrete support exerts on the bridge at the far end is 201.25 N.
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A model airplane heads due east at 1.50 meters per second, while the wind blows due north at 0.70 meter per second. The scaled diagram below represents these vector quantities.
A)1.7m/s
B)1.7m/s^2
C)2.2m/s
D)2.2m/s²
The resultant physical quantity, velocity is 1.7 m/s. The correct option is A.
What is triangle law of vector addition?When two vectors are represented by vectors, their resultant will be the closing side of the triangle.
A model airplane heads due east at 1.50 meters per second, while the wind blows due north at 0.70 meter per second.
The right angle triangle is formed from the two velocity vectors and its resultant will be its hypotenuse.
Then, from the Pythagoras theorem,
Vr ² = (0.70)² + (1.50)²
Vr = 1.65 m/s
Thus, the resultant velocity is approximately 1.7 m/s.
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Suppose you were to make a three-dimensional model of magnetic force
using magnetic field lines and a magnet. Which two characteristics might
your model have?
A. The field lines exist only at the top and the bottom of the magnet.
B. Arrows on the field lines point from the magnet's north pole to its
south pole.
C. The field lines near the magnet are far apart.
D. The field lines do not cross paths as they go from one pole of the
magnet to the other.
दा
Answer:
D. Po cguro pero I will study hard to get the correct answer and I will share to you pero I try mo Lang po Yan kac halos kami dito Yan po Yung nilagay namin na answer baka kac Tama po e Kaya tau mag aral po tau ng mabuti Para MAtopad natin Yung mga pangarap natin at making tau sa mga pamilya at guro Yung Lang po good bless
How many kg of ice at 0°C must be added to 0.6kg of water at 100°C in an insulated 0.1kg copper container and its contents to 30°C? The specific heats of water and copper are 4.2 and 0.39 kJ/kgK, respectively; the heat of fusion of ice is 335 kJ/kg.
Answer:
.389 kg of ice required
Explanation:
The heat absorbed by melting the ice and warming it to 30 C
must be equal to the heat lost by cooling the existing water and the copper from 100 to 30 C
First, melt the ice (this occurs at a constant temperature)
x * 335 kj/kg and warm this water x * 4.2 kj/kg-k * 30 k
(x = kg of ice required)
then cool the copper and the .6 kg water from 100 to 30 C (70 degrees)
.1 kg * .39 * 70 K + .6kg * 4.2 kj/kg-K * 70 K
then equate the two amounts of heat
x ( 335 + 4.2 *30) = .1 * .39 * 70 + .6 * 4.2 * 70
solve for x = .389 kg
Discuss why schizophrenia disorder interests you.
Describe how schizophrenia impacts someone on a daily basis.
Describe the labels and/or stigma associated schizophrenia. (i.e. “crazy,” “insane,” “get over it,” “psycho,” “neurotic,” etc).
Answer:
schizophrenia is a chronic disease meaning it doesn't go away. It affects a person mentally, and on a daily basis is hard to see who or what is reality or an illusion. People with schizophrenia have a hard time getting a job, because it's hard to focus.
Most stigmas people have with schizophrenia is paranoid, or insane. They think something or someone is following them because they see something that makes them uncomfortable all the time.
Explanation:
12. Humans are considered the best endurance runners because of the body’s ideal method of cooling called _________________, which allows the body to release heat and therefore cool itself continuously.
Answer:
Sweating
Explanation:
Sweating allows the body to release heat, causing the body to cool itself.
A rifle recoils while firing a bullet. The speed of the rifle's recoil is small because the
A rifle recoils while firing a bullet. The speed of the rifle's recoil is small because the rifle has more mass than the bullet.
[tex]p_{1} =-p_2}[/tex]
[tex]m_{1} V_{1} =-M_{2} v_{2}[/tex]
Answer:
Explanation:
A rifle recoils while firing a bullet. The speed of the rifle's recoil is small and typically fast because the rifle has more mass than the bullet.
1. The object or point from which movement is determined is called a
of
Answer: reference point
Explanation: A reference point could be a put or question utilized for comparison to decide in case something is in movement.
A positive charge is fixed at point (−4,−3) and a negative charge − is fixed at point (−4,0). Determine the net electric force ⃗ net acting on a positive test charge + at the origin (0,0) in terms of the given quantities and physical constants, including the permittivity of free space 0. Express the force using unit vector notation. Enter precise fractions rather than entering their approximate numerical values.
The net electric force acting on a positive test charge at the origin is determined as ¹/₉(kq₁q₂).
Net electric force on the chargesThe net electric force on the charges is calculated as follows;
F = kq₁q₂/r²
where;
k is coulomb's constantq₁ and q₂ are the chargesr is the distance between the chargesDistance between the charges[tex]|r| = \sqrt{(x_2-x_1)^2+ (y_2-y_1)^2} \\\\|r| = \sqrt{(-4--4)^2+ (0--3)^2} \\\\|r| = \sqrt{(0)^2 + (3)^2} \\\\|r| = 3 \ units[/tex]
[tex]F_{net} = \frac{kq_1q_2}{3^2} \\\\F_{net} = \frac{1}{9} (kq_1q_2) , \ N[/tex]
Thus, the net electric force acting on a positive test charge at the origin is determined as ¹/₉(kq₁q₂).
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a circuit has two 11.4 volts batteries and a bulb with a resistance of 18.7 ohms calculate the current flowing through the circuit
Lab:Motion
Here you go if you need help!!!!!!
Mars had a mass of 6.38* 10^23 kg and a radius of 3,390,000meter what is the force of gravity experienced by a mars rover with a mass of 3.7 kg playing in the Martian surface
I hope its helps you . you can also write 1.44×10^3 it will be better
what are loops and its types
Answer:
A for loop is a loop that runs for a preset number of times. A while loop is a loop that is repeated as long as an expression is true. An expression is a statement that has value. A do while loop or repeat until loop repeats until an expression becomes false.
In which 120-V light bulb does the filament have greater resistance: a 60-W bulb or a 120-W bulb?
Answer:
60W
Explanation:
A higher watt bulb allows more electricity through, therefore the resistance must be lower.
An object moving at 15 m/s slows uniformly at a rate of 2.0 m/s each second for 5.0 s. What is its final speed?
(100 POINTS AND BRAINLIEST)
Atoms form chemical bonds using:
a. electrons in the innermost energy level
b. electrons in the outermost energy level
c. protons and electrons
Answer:
electron in the outermost
Explanation:
These are the electrons available for bonding or transfer
protons do are not involved in actual bonding
Answer:
b
Explanation:
Atoms form chemical bonds using electrons in the outermost energy level, otherwise known as valence electrons.
For atoms to bond, they must either gain or lose electrons.
By gaining electrons, the atom attains a negative charge.
By losing electrons, the atom attains a positive charge.
5. How far can a car travel in 14 hours while going at a speed of 75 miles per hour?
[tex]\qquad\qquad\huge\underline{{\sf Answer}}[/tex]
Here we go ~
Speed of the car is 75 miles per hour and it travels for 14 hours. so the distance travelled by it in the given period of time can be calculated using this formula ~
[tex]\qquad \sf \dashrightarrow \: d = v \sdot t[/tex]
[tex]\qquad \sf \dashrightarrow \: d = 75 \times 14[/tex]
[tex]\qquad \sf \dashrightarrow \: d = 1050 \: \: miles[/tex]
so, it can travel 1050 miles in 14 hours
Answer:
1050 miles
Explanation:
Simply:
d = 75 m/hr * 14 hr =1050 miles
( see how the 'hr' cancels and you are left with miles ?)
Water flowing through a garden hose of diameter 2.74 cm fills a 25.0-liter bucket in 2.50 min. What is the volumetric flow rate?
You are walking through the woods and cone acroos an old well thats 15 meters deep if the speed of sound and air is 340 m/s then how long would it take to hear echo
Answer:
.0882 s
Explanation:
Sound has to travel to the bottom (15 m) then back up (15m ) to hear the echo
(15 + 15 m) / 340 m/s = .0882 s
A roller coaster is moving at 10 m/s at the top of a hill and 22 m/s at the bottom of the hill two seconds later. What is the acceleration of the roller coaster?
Answer:
The acceleration is
Explanation:
Acceleration = final velocity - initial velocity
---------------------------------------
speed
Initial velocity = 10m/s
final velocity = 22m/s
speed = 2 secs
acceleration = 22 - 10
-----------
2
= 12/2
6 m/s^2
A 20 kg bike accelerates at 10 m/s2. what was the net force
Explanation:
Fnet = m.a
= (20)(10)
= 200N
A horizontal rectangular surface has dimensions 3.00 cm by 4.20 cm and is in a uniform magnetic field that is directed at an angle of 32.0 ∘ above the horizontal.
What must the magnitude of the magnetic field be to produce a flux of 3.60 × 10 −4 Wb through the surface?
Hi there!
Recall the equation for magnetic flux.
[tex]\Phi _B = \oint B \cdot dA[/tex]
We can also rewrite this as:
[tex]\Phi_B = B \cdot A = BAcos\phi[/tex]
B = Magnetic field strength (T)
A = Area of surface (m²)
φ = angle between the surface's area vector and magnetic field
Since the rectangular surface is horizontal, its perpendicular area vector points straight UP.
The magnetic field makes an angle of 32° with the surface but makes an angle complementary to this angle with the AREA VECTOR. (Think: the vertical)
Complementary of 32° ⇒ 90° - 32° = 58°
Now, we can rearrange the above equation to solve for the magnetic field.
[tex]\Phi_B = BA cos\phi \\\\B = \frac{\Phi_B}{Acos\phi}\\\\B = \frac{3.6 \times 10^{-4}}{(0.03 * 0.042)cos(58)} = \boxed{0.539 T}[/tex]
Do electrons flow easier with
HIGH resistance or LOW
resistance?
A. low
B.high
Answer:
low.
Explanation:
it makes the flow easier if its lower because, the resistance isn’t pushing as hard against the flow which means that the flow is easier.
Which of the following is an example of in-group bias? A. Avery, who loves to go to car shows B. Shelly, who thinks her cheerleading team is better than any other school's team C. Zoe, who likes to shop more than anything else D. Matt, who loves to watch his favorite team play football
Answer:
B because since SHE is in the team she is in group and it is bias because she treats the other teams as competition. Hope this helps!
Explanation:
If the number of turns in a primary coil is 200 and the voltage is 120 V, then how many turns are needed in a secondary coil of a transformer to produce an output voltage of 24,000 V?
Np/Ns = Vp/Vs
200/Ns=120/24000
Ns=40,000
The expression of x=4t+2t^2 Where x is distance and t=time What is displecement ?
Answer:
x = 4 t + 2 t^2
the displacement is x which is zero at t = 0 and then increases indefinitely as t increases indefinitely
Anujan and Piragavy are pulling on either side of a box with ropes. Anujan rope pulls with a force of 35 N [35° N of W], while Piragavy pulls with a force of 11 N [41° S of E]. There is a frictional force of 6 N [s] opposing the motion. Calculate the following: The Fnet and the acceleration of the object.
The net force on the block is 20.678 N. Force is defined as the product of mass and acceleration. Its unit is Newton.
What is force?Force is defined as the push or pull applied to the body. Sometimes it is used to change the shape, size, and direction of the body.
Anujan rope pulls with a force of 35 N [35° N of W]. The force is resolved in x and y direction as;
[tex]\rm F_{1x}= 35 cos 35^0 \\\\ F_{1y}=35 sin 35^0[/tex]
Piragavy pulls with a force of 11 N [41° S of E]. The force is resolved in x and y direction as;
[tex]\rm F_{2x}= 11 cos 41^0 \\\\ F_{2y}=11 sin 41^0[/tex]
The net force on the block is;
[tex]\rm F_{net}=F_{1x}-F_{2x}\\\\\ F_{net}=35 \ cos 35^0- 11 \cos 41^0 \\\\ F_{net}=20.678 \ N[/tex]
Hence,the net force on the block is 20.678 N.
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How much work is done on the object as it moves from 6.0m to 9.0m
Answer:
W = 3F
Explanation:
Work is defined as the inner product between force and displacement. The inner product picks out the force components which point in the same direction as the displacement. The vertical components do not matter in the horizontal displacement. I am assuming you're dealing with 1-dimensional motion? Then the work would be:
[tex]W=Fd[/tex]
The displacement is 3 meters. Therefore, the work is:
[tex]W=3F[/tex]
You haven't gave the force being applied to the object, so I cannot give an explicit answer. Just multiply the force by 3 to get the work.
There is an increasing use of LEDs for lighting. What does LED stand for?
Answer:
LED stands for light emitting diode. LED lighting products produce light up to 90% more efficiently than incandescent light bulbs.
A pendulum completes 3 cycles in 12 seconds. What is its period?
Answer:
[tex]period = 4s[/tex]
Explanation:
[tex]period = \frac{total \: time}{number \: of \: cycles} [/tex]
[tex]period = \frac{12}{3} [/tex]
[tex]period = 4s[/tex]