Cbse class 12 Energy of photoelectrons emitted from a photosensitive light surface is 1.56eV. If its threshold wavelength is 2500Å find the wavelength of incident light.

Write short note on the following ; collision theory, rotation angle and angular velocity, centripetal acceleration, coriolis force, and newton's law of gravitation.

A1000-kg weather rocket is launched straight up. the rocket motor provides a constant acceleration for 16-s, then the motor stops. the rocket altitude 20-s after launch is 510-m. you can ignore any effects of air resistance. a. what was the rocket’s acceleration during the first 16-s? b. what is the rocket’s speed as it passes through a cloud 5100-m above the ground?

Why is it important always to use horizontal bars in unit fractions when performing unit conversions?