Compare the momentums of a 50 kg dolphin swimming at 16.4 m/s and a 4100 kg elephant walking 0.20 m/s?

Answer : The momentum is same for 50 kg dolphin and 4100 kg elephant.

Explanation :

Momentum : It is defined as the motion of a moving body. Or it is defined as the product of mass of velocity of an object.

Formula of momentum is:

where,  

p = momentum

m = mass

v = velocity

First we have to calculate the momentum for 50 kg dolphin swimming at 16.4 m/s.

Given:

m = 50 kg

v = 16.4 m/s

Now put all the given values in the above formula, we get:

Now we have to calculate the momentum for 4100 kg elephant walking 0.20 m/s.

Given:

m = 4100 kg

v = 0.20 m/s

Now put all the given values in the above formula, we get:

From this we conclude that, the momentum is same for 50 kg dolphin and 4100 kg elephant.

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