Neon is generally used in sign boards. If is emits strongly at 616 nm, calculate:
distance travelled by this radiation in 30s.

A car accelerates uniformly from 18 km/h to 30 km/h in 5s. Calculate the distance covered by the car in that time.

The brakes applied to a car produce an acceleration of 6 ms^(-2) in the opposite direction to the motion. If the car takes 2 s to stop after the application of brakes, calculate the distance traveled during this time.

Infrared lamps are used in restaurants to keep the food warm. The infrared radiation is strongly absorbed by water, raising its temperature and that of the food. If the wavelength of infrared radiationis assumed to be 1500 nm, and the number of quanta of infrared radiation produced per second by an infrared lamp (that consumes enregy at the rate of 100 W and is 12% effcient only) is (xx10^(19) , then the value of x is : (Given: h= 6.665xx10^(-34)J-s)

An athelete completes one round of a circular travel diameter 49 m in 20s. Calculate the distance correct and displacement at the end of 30s.

A man whose mass is 50 kg climbs up 30 steps of a stair in 30 s. If each step is 20 cm high, calculate the power used in climbing stairs.