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Sever21 [200]
3 years ago
7

If you are in an airplane. you look out the window and the clouds appear to be moving. what is your frame of reference?

Physics
1 answer:
-BARSIC- [3]3 years ago
5 0
Hello,

<span>You are in an airplane, you look out the window and the clouds appear to be moving, your frame of reference is the window. As the frame of reference can not be accelerating, clouds accelerate, and so does the airplane.

Faith xoxo</span>
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Find the magnitude and direction of an electric field that exerts a 4.80×10−17N westward force on an electron. (b) What magnitud
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Explanation:

(a) E = F/q

E = 4.8×10^-17/1.6×10^-19

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2 years ago
5. How much heat is generated when an
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Answer:

I HOPE THIS IS CORRECT

Explanation:

Power of water =2 kw=2000w

Mass of water =200kg

difference in temperature ΔT=70−10=60oC

Concept

energy required to heat the water = energy given by water in time t=pt

energy required to increase tempeature of water by 60oC,Q=msΔT

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or   t=25.2×103sec.

6 0
3 years ago
A voltage V is applied to the primary coil of a step-up transformer with a 3:1 ratio of turns between its primary and secondary
Snezhnost [94]

Explanation:

Let N_p\ and\ N_s are the number of turns in primary and secondary coil of the transformer such that,

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For a transformer, \dfrac{N_s}{N_p}=\dfrac{V_s}{V_p}

V_s=(\dfrac{N_s}{N_p})V_p

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100\ W=\dfrac{V_s^2}{R}

V_p^2=\dfrac{100R}{9}.............(2)

Let N_p'\ and\ N_s' are the new number of turns in primary and secondary coil of the transformer such that,

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New voltage is :

V_s'=(\dfrac{N_s'}{N_p'})V_p'

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So, new power dissipated is P_s'

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