Abird sitting high in a tree is an example of an object with what type of energy?

a. potential energy because it has the ability to do work.
b. kinetic energy because it has the ability to do work.
c. potential energy because it is doing work.
d. kinetic energy because it is doing work.

a. potential energy because it has the ability to do work.

Explanation:

Here when object is in motion then the energy stored in it is known as kinetic energy

while if an object is at rest at some height above the surface then the energy stored in it is known as gravitational potential energy

this energy is stored in the object and it shows the ability to do work

when the object is dropped from some height then this gravitational PE will convert into kinetic energy

so here correct answer will be

a. potential energy because it has the ability to do work.

b mirrors submit a iisner? e. for which optical devices does d sometimes have a positive value? o a a and b o b. a and c o c. b and d 0 d. b and cb

5 w for 1hr = 5x60x60 joules=300x60=3000x6=18,000j as total energy conversion. efficiency of bulb needed for radiant to thermal within 18000