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

A solid body will float in a liquid if its

A moving car of mass 800 kg experiences a frictional force of 200N. If it accelerates 2 ms-2, calculate the magnitude of the force applied to the car

Uniform speed occurs when there is equal change of

Which of the following physical quantities are derived? i. Area ii. Thrust iii. Pressure iv. Mass

An object is said to undergo oscillatory motion when it moves

A body is rotating in a horizontal circle of radius 2.5m with an angular speed of 5 rad s-1. Calculate the magnitude of the radial acceleration of the body

Which of the following phenomena causes capillary of liquids in tubes of narrow bore?

A block of volume 3 x 105m3 and density 2.5 x 103 kg m-3 is suspended from a spring balance with \(\frac{2}{3}\) of its volume immersed in a liquid of densit...