An engine can exert a force of 1,000 newtons. How fast can this engine
accelerate:
a. a 1,000-kg car?
b. a 2,000-kg car?

a. a 1,000-kg car

Explanation:

Q: F = ma

(a) F = 100n

    M = 1000vg

    A = ?

--> F = ma  

--> a = f/m

     a = 1000/1000                                                                                                                                        a= 1m/8*2                                                                                                                                           (b)   F = 1000N

      m = 2000 vg

       a = ?

--> F = ma

     a = f/m

     a = 1000/2000

     a = 0.5 m/8*2

when a device is used in a circuit in which the voltage is 81 v, the current flowing through the device is 3 a. what is the resistance of the device?

a. 27 ω

b. 40.5 a

c. 243 ω

d. 243 a

the correct answer is a. 27

as we know our atmosphere or air have different levels. every level has other gasses, and every gas has another permeability. when the light comes from lower permeability to higher permeability, it changes its direction. so that means that when the light comes from the moon to the earth, it changes it's direction many more times. it basically means that the shape of the light part of the moon is changed on the earth.

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