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Oduvanchick [21]
3 years ago
15

A 5kg goes from 4m/s to 20m/s determine the change in momentum

Physics
1 answer:
lukranit [14]3 years ago
5 0

Answer:

i might know the answer to this, so can you help me with my question too?

Explanation:

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Which statement is true about an object that sinks in water?
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*WILL MARK BRAINLIEST*
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1.52

Explanation:

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An inventor develops a stationary cycling device by which an individual, while pedaling, can convert all of the energy expended
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Answer:

Q=94185\ J

Explanation:

Given:

  • mass of water, m=0.3\ kg
  • initial temperature of water, T_i=20^{\circ}C
  • final temperature of water, T_f=95^{\circ}C
  • specific heat of water, c=4186\ J.kg^{-1}.K^{-1}

<u>Now the amount of heat energy required:</u>

Q=m.c.\Delta T

Q=0.3\times 4186\times (95-20)

Q=94185\ J

Since all of the mechanical energy is being converted into heat, therefore the same amount of mechanical energy is required.

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3 years ago
The magnetic field produced by the solenoid in a magnetic resonance imaging (MRI) system designed for measurements on whole huma
Vesna [10]

Answer:

Number of turns per unit length will be n=2.786\times 10^4turns/m

Explanation:

We have given that strength of the magnetic field produced by the solenoid B = 7 T

Current in the solenoid i = 200 A

Let the number of turns per unit length is n

Magnetic field due to solenoid is given as B=\mu ni here \mu is permeability of free space n is number of turns per unit length and i is current

So 7=4\pi \times 10^{-7}\times  n\times 200

n=2.786\times 10^4turns/m

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