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Rudik [331]
2 years ago
5

A student measured the volume of three rocks. The diagram above shows the

Physics
1 answer:
victus00 [196]2 years ago
4 0

Answer:

option B is right

...............

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What is the force of a lead ball that starts with a momentum of 7 kg*m/s and end with a momentum of 22 kg*m/s over a time of 31
Gwar [14]

Answer:

F = 0.483 N

Explanation:

Initial momentum, P_i= 7\ kg-m/s

Final momentum, P_f= 22\ kg-m/s

Time, t = 31 s

We need to find the force of a lead ball. We can use here the impulse momentum theorem.

\text{Change in momentum}=F\times t

F is force

P_f-P_i=Ft\\\\F=\dfrac{P_f-P_i}{t}\\\\F=\dfrac{22-7}{31}\\\\F=0.483\ N

So, the force is 0.483 N.

6 0
3 years ago
How long would it take for a car to travel 200 km if it has an average speed of 55 km hr?
Rainbow [258]

Answer:

3.63 hours or 3 and 37.5 minutes

Explanation:

200/55

Hope this helps :)

6 0
3 years ago
Why is the coefficient of friction independent of the mass?
Svet_ta [14]
Because the coefficient of friction depends on the surface
3 0
3 years ago
The amount of diffraction that a sound wave undergoes depends on
BigorU [14]
The amount of diffraction of sound waves depends on the medium the sound wave travels to and the frequency. Diffraction happens as soon as it has been out of the source.
5 0
2 years ago
A stone is thrown vertically up. What kind of energy did the stone have initially? What happens to this energy as the stone asce
Alex

Answer:

kinetic energy at first

Explanation:

kinetic turns to potential as it gains height

7 0
3 years ago
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