What is the input of energy for a device that provides 50 units of useful energy and has an efficiency of 0.55?

How much force is required to accelerate a 50 kg with a mass at 4 m/s2?

A girl rides her bike at 2.52 m/s on the way to her friends how which is 628 m away. How long does it take the girl to get to her friends house?

The processes that are changing the earth today are the same as they were in the past. What is this called?

A wave has a wave length of 20mm and a frequency of 5 hertz. What is the speed?

A motorcycle accelerates from 10. m/s to 25 m/s in 5.0 seconds. What is the average acceleration of the bike? A. 3.0 m/s/s B. 5.0 m/s/s C. 15 m/s/s D. 25 m/s/s

Convert 1.5 radian into milliradians.

Whats the core of electromagnet made of?

Ultraviolet light emits a total of 2.5 * 10^-17 J of light at a wavelength of 9.8 * 10^-7 m. How many photons does this correspond to?

3. A ray of light incident on one face of an equilateral glass prism is refracted in such a way that it emerges from the opposite surface at an angle of 900 to the normal. Calculate the i. angle of incidence. ii.

What would happen to the stratosphere if humans were to increase the amount of ozone within it?