Question

Hello Again! I need the following 3 questions answered straight away :)

1. Nuclear power plants generate electricity from

A.
Nuclear fusion

B.
Electrical repulsion

C.
Nuclear fission

D.
Combustion

2. Why is the actual mechanical advantage of a machine always less than its ideal mechanical advantage?

A.
The presence of friction results in the actual mechanical advantage of a machine always being more than its ideal mechanical advantage.

B.
The presence of friction results in the actual mechanical advantage of a machine always being less than its ideal mechanical advantage.

3. Calculate work output:

Work input = 52j

efficiency = 90%

(Thank you kindly for your smart excellent answers:))

Answer 1

Answer:

1. A. Nuclear fission.

2. B.The presence of friction results in the actual mechanical advantage of a machine always being less than its ideal mechanical advantage.

3. 46.8 J