Physics Answers

What is dipole moment.

Explain central force and equation.

What is efficiency of refrigrator.

Explain carnot engine efficiency

If the stone in fig A enters the water at 41.6 ms^-1, and takes 0.6s to travel the 3 meters to the bottom of the pond, what is its average acceleration in the pond water?

The bird in fig A drops the stone from a height of 88 m above the water surface. Initially, the stone has zero vertical velocity. How long will it take the stone to reach the surface of the pond? (Assume air resistance is negligible.)

At what distance does a star have an apparent magnitude that is 5 magnitudes brighter (smaller) than its absolute magnitude?

Two stars differ by 8 absolute magnitude.what is the ratio of there luminosities?

star A is 4 magnitudes brighter than star B .how does the apparent brightness of star A compare with that of star B?

Write down the measurement and absolute uncertainty for:

36.9 °C temperature measured with a thermometer which has a quoted accuracy of: ‘± 0.1 °C (34 to 42 °C), rest of range ± 0.2 °C’.