Physics Past Questions and Answers

A 500kV is applied across an X-ray tube. Calculate the maximum velocity of the electrons produced [Me = 9.1 x 10^-31kg, e = 1.6 x 10^-19C]

A radioactive substance of mass 768g has a half life of 3 years. After how many years does this substance leave only 6g undecayed?

Fusion is not usually used for generating electric power because

An atom \(^{234}_{91} P\) emits a gamma radiation. The resultant nuclide is

The diagram above shows the speed-time graph of a car.If the car covered a total distance of 600m in 25s, calculate its maximum speed