Answer:
An experiment is conducted in which a cart travels across a horizontal surface and collides with a wall. Data collected from the experiment are used to create the graph of the cart's velocity as a function of time. All frictional forces are considered to be negligible. Which data from the graph should the student use to determine the direction of the net force exerted on the cart and the direction of the change in momentum of the cart from the time intervals of A to B?
Explanation:
As we know that
Force=dp/dt(Change in momentum/time)So
20N=dp/2dp=10N/sHence the speed of car will remain the same it won't affect the speedAs momentum from wall is more the ball will travel in opposite directionOption C is correct
A bird flies north 3 kilometers and then south 4 kilometers, what is the resultant displacement of the bird? Do not forget to include the direction
Answer: let north be+ and south be-
therefore, -1 km is the resultant displacement of the bird
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Answer:5 meters northeast
Explanation:
I just took the test.
n his Book of Questions, Gregory Stock asks, "If you could spend one year in perfect happiness but afterward would remember nothing of the experience, would you [spend a year that way]?" How would you answer Stock's question? Address either the psychological or philosophical issues raised by your response.
Answer:
1111111
Explanation:
Answer:
564356
Explanation:
Select the correct answer.
In which of these examples does chemical energy change to electrical energy
A. digesting food
B. photosynthesis
C. respiration
D. using a battery
Recet
Answer:
I think it would be using a battery recet
Explanation:
Answer: Using a battery
Explanation:
blank is the of matter in an object.
Answer:
mass
Explanation:
Explanation:
mass is the answer.......
What net force would be needed to accelerate a 2.95kg bowling ball at 6.25m/s^2?
The net force would be needed to accelerate a 2.95kg bowling ball at 6.25m/s^2 will be F = 18.4375 N
What is Newton's second law of motion ?Newton's second law of motion states that the time rate of change of the momentum of a body is equal in both magnitude and direction to the force imposed on it.
For a constant mass , force is equal to Force = mass * acceleration
given
mass(M) = 2.95 kg
acceleration(a) = 6.25 m/s^2
Force(F) = ?
Force(F) = mass(M) * acceleration(a) (from Newton's second law of motion )
F = 2.95 * 6.25
F = 18.4375 N
The net force would be needed to accelerate a 2.95kg bowling ball at 6.25m/s^2 will be F = 18.4375 N
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How is mass and weight alike?
What is the acceleration of a 20N wooden box moving to the right with a force of 8N? It’s on a flat surface (wood)
Explanation:
if question specifies g=10ms^-2 then use that or else use g =9.81
Mass of wooden box= 20/9.81 = 2.0387359.... kg
F=ma
a=F/m
a=8/2.0387
a=3.92 ms^-2 (3 s f)
pressure exerted by a liquid ______ with an increase in depth (increases/decreases)
Answer:
increases
Explanation:
as we know, that submarines need to be really really strong to go down in the ocean. That means that the more they go down in the water (liquid) then, they will face more pressure. That as we said, that the more down they go, the more pressure will be on them, which means that the pressure will keep on increasing as you go down and down in the ocean.
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An object was placed in 75 ml of water. When the object was then measured in the water, the new volume of the water with the object was 86 ml. What is the volume of the object?
Note: You only have to fill in the numerical answer.(no units)
Answer:
The answer is 11 mLExplanation:
To find the volume of the object we use the formula
volume of object = final volume of water - initial volume of water
From the question
final volume of water = 86 mL
initial volume of water = 75 mL
So we have
volume of object = 86 - 75
We have the final answer as
11 mLHope this helps you
A 22 g particle is moving to the left at 21 m/s . How much net work must be done on the particle to cause it to move to the right at 46 m/s
Answer:
18.425 Joules
Explanation:
To figure this out we can simply use the W=Change in Kinetic Energy,
W = 1/2*.022*46^2-1/2*.022*21^2 (Note we can ignore the direction of the particles as we need to take the square of the velocity)
W=18.425 (By simplifying the expression)
How can people in australia be held on earth when they are ""upside down""?.
Answer:
Gravity
Explanation:
Because gravity is pulling you toward the center of the Earth.
ES 1. How fast must a truck travel to stay beneath an airplane that is moving 105 km/hr at an angle of 25 degrees to the ground?
Answer:
The truck must travel at a speed of 98.6677 km/hr to stay beneath the airplane
Explanation:
The given parameters are;
The velocity of the airplane, v = 105 km/hr
The direction of the airplane, θ = 25 degrees to the ground = 25°
Therefore, we have that the horizontal component of the velocity of the plane, vₓ is given as follows;
vₓ = v × cos(θ) = 105 km/hr × cos(25) ≈ 98.6677 km/hr
The vertical component of the velocity of the plane, [tex]v_y[/tex], is given as follows;
[tex]v_y[/tex] = v × sin(θ) = 105 km/hr × sin(25) ≈ 44.37 km/hr
The truck only has to travel at a speed equal to the horizontal velocity of the airplane to stay beneath the airplane
Therefore, the travelling speed the truck must be vₓ which is 98.6677 km/hr to stay beneath the airplane.
2. The speed of truck is 39 m/s. How long does it take for the truck to travel 9,000 m?
Answer:
[tex]\boxed {\tt 230.769231 \ seconds}[/tex]
Explanation:
Time can be found by dividing the distance by the speed.
[tex]t=\frac{d}{s}[/tex]
The distance is 9,000 meters and the speed is 39 meters per second.
[tex]d= 9,000 \ s\\s=39 \ m/s[/tex]
Substitute the values into the formula.
[tex]t=\frac{9,000 \ m}{39 \ m/s}[/tex]
Divide. Note that the meters, or "m" will cancel out.
[tex]t=\frac{9,000}{39 \ s}[/tex]
[tex]t=230.769231 \ s[/tex]
It takes 230.769231 seconds for the truck to travel 9,000 meters at 39 meters per second.
If the object's initial velocity is 0 m/s , what is the velocity of an object at t = 8.0s
Answer:
0_8.0
8.0m/s
Explanation:
8.0m/s is the velocity of an object .
a force of 4.40 N is applied to a dart over a distance of 0.54 m. The dart has a mass in of 0.028 kg. Assuming no energy is lost due to friction. what will be the speed of the dart after it’s thrown.
The kinetic energy refers to energy in motion. The moving dart possesses kinetic energy. From the calculations, the speed of the dart after it is thrown is 13 m/s.
What is energy?The term energy refers to the ability to do work. We must note that work done is throwing the dart is equal to the kinetic energy of the moving dart once it is thrown.
If work done = kinetic energy = Fx
Where;
F = force
x = distance
W = 4.40 N * 0.54 m = 2.376 J
Now;
KE = 1/2 mv^2
m = mass of the dart
v = velocity of the dart
v = √2KE/m
v = √2 * 2.376/ 0.028
v =13 m/s
Learn more about kinetic energy: https://brainly.com/question/999862
C
The unit of force, newton is a derived unit.
derived unit
Answer:
Because
Explanation:
5he force is not fundamental physical unit
Once the ball reaches the very top it's velocity is ?
A) zero
B) negative
C) accelerating
D) positive
Which statement explains why a strip of sulfur is a better electrical insulator
than a strip of silicon?
A. Sulfur atoms have fewer protons than silicon atoms.
B. Sulfur atoms have more protons than silicon atoms.
C. Sulfur atoms allow more electrons to move between atoms than
silicon atoms do.
D. Sulfur atoms allow fewer electrons to move between atoms than
silicon atoms do.
Answer:
I think.d
(•‿•) bakalang tama
Answer:
d
Explanation:
because atoms fewer electrons to move between atoms than silicon atoms do
Which factor will not affect the speed of sound?
(size of the medium) or (elasticity of the medium)
Answer:
size of the medium
Explanation:
Calculate the weight of your 2kg physics book on earth
A.15 N
B.19.6 N
C.9.8 N
D.4.9 N
The Empire's space station is a long way from any star. It is circular and has a radius of 5. 10 km. The angular velocity that is needed to give the station an artificial gravity of 9. 80 ms2/ at its circumference is:___.
A) 4. 4 times 10^-2 rad/s.
B) 7. 0 times 10^-3 rad/s.
C) 0. 28 rad/s.
D) -0. 22 rad/s.
E) 1. 3 times 10^3 rad/s
Answer:
A
Explanation:
r= 5100m
acceleration of center=g= [tex]\frac{v^{2} }{r}[/tex]
v= rw, Which is angular velocity X radius
put this in acceleration of center equation
= [tex]\frac{(rw)^{2} }{r} =g[/tex]
= [tex]rw^{2} =g[/tex]
= [tex]5100 . w^{2} = 9.8[/tex]
[tex]w^{2} = 0.0019[/tex]
=[tex]\sqrt{0.0019} = 0.0438[/tex]
which is approximately A.
if we shake the branches of tree the fruits fall why
Answer:
Explanation:
when a tree is shaken it's fruits and leaves fall down due to the gravitational force exerted by earth.
All fruits and leaves do not fall when tree is shaken, mostly only those fruits and leaves are fallen that are ripped.
It's because their tissues has become weak
A projectile is launched horizontally at off a 20m high position. It goes 60m
horizontally. What was its launch speed?
Acceleration is the change in the speed or direction of an object over time—in other words,acceleration is a change in an object's velocity over time. To determine the rate of acceleration, you usethe formula below. The unit for acceleration is meters per second per second ( m/s2). A positive value oracceleration shows speeding up, and negative value for acceleration shows slowing down. Slowingdown is also called deceleration
Explanation:
The acceleration of an object is equal to the rate of change of velocity. Its mathematical form is given by :
[tex]a=\dfrac{v-u}{t}[/tex]
Where
v is final velocity, u is initial velocity and t is time taken
The SI unit of velocity is m/s and that of time is s. The SI unit of acceleration is [tex]\dfrac{m/s}{s}=m/s^2[/tex]
If final velocity is more than the initial velocity, acceleration is positive.
If the final velocity is less than the initial velocity, the acceleration is negative. It is also known as deceleration.
Hence, all the statement is true.
Help!!!!!!! Plsss!! Plsss!
Answer:
A
Explanation:
D is non-metal, gas, insulator
C is also non-metal, insulator
B is a metalloid, semiconductor, still have low melting point
A is a metal, solid, good conductor, have high melting point.
Answer:
This is Hard
Explanation:
I recommend asking a teacher for help
PLEASE HELP ASAP !! I WILL MARK YOU BRAINLIEST!!
original question for context:
“Three identical metal spheres are used for an experiment.
Before the experiment begins the charges on the spheres
are as follows”
Sphere: A Charge: -4.0C
Sphere: B Charge: -8.0C
Sphere: C Charge: +9.0C
Total: -3C
By knowing that the total charge must remain constant, we will see that:
c)
Sphere A will have: -4.0 CSphere B will have: 0.5 CSphere C will have: 0.5 CTotal = -3.0 Cd)
Sphere A will have: -1.0 CSphere B will have: -1.0 CSphere C will have: -1.0 CTotal = -3.0 CWhat happens when we touch the charged spheres?
If these are conductor spheres, we can assume that the charge flows through the spheres.
So, when two touches, the charge tries to equilibrate.
When sphere B and sphere C touch, the total charge between them would be equally distributed between the two spheres.
Charge B = -8.0 C
Charge C = +9.0 C
Total = -8.0 C + 9.0 C = 1.0 C
half of that is 0.5 C
Then now both sphere B and sphere C will have 2.5C each.
And sphere A still has the -4.0 C
Then the total of the 3 spheres is:
0.5C + 0.5C - 4.0C = -3.0C
The total charge never changes in a closed system, remember that.
D) Similar to before, this time the total charge will be equally distributed among the 3 spheres.
The total charge is -3.0C
So:
Sphere A will have: -1.0 CSphere B will have: -1.0 CSphere C will have: -1.0 CAnd the total charge will be:
-1.0 C + -1.0 C + -1.0 C = -3.0C
If you want to learn more about charge conservation, you can read:
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A 70kg physics student is pushed with the force of 140 N , what will be the students acceleration ?
Answer:
The answer is 2 m/s²Explanation:
The acceleration of an object given it's mass and the force acting on it can be found by using the formula
[tex]a = \frac{f}{m} \\ [/tex]
where
f is the force
m is the mass
From the question
f = 140 N
m = 70 kg
We have
[tex]a = \frac{140}{70} = \frac{14}{7} \\ [/tex]
We have the final answer as
2 m/s²Hope this helps you
what is the relationship between applied force and displacement
Answer:
Force in the Direction of Displacement. The work done by a constant force is proportional to the force applied times the displacement of the object
This table shows the weights of four different objects that are sitting on the floor. A person tries to lift each object with a force of 18 N, upward. Which
statement is supported by the data in the table?
Answer:
C. Objects 1 and 2 will not move, and objects 3 and 4 will accelerate upward
Explanation:
I took the test
The bowling ball in the Figure below is whizzing down the bowling lane at 4.0 m/s. If the mass of the bowling ball is 7.0 kg, what is its kinetic energy?
The kinetic energy of the bowling ball is 56 J
What is kinetic energy?Kinetic energy is the energy possessed by an object is motion.
How to determine the kinetic energyFrom the question given above, the following data were obtained:
Velocity (v) = 4 m/sMass (m) = 7 KgKinetic energy (KE) =?KE = ½mv²
KE = ½ × 7 × 4²
KE = 3.5 × 16
KE = 56 J
Learn more about energy:
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