The helium isotope \(^3_2He\)

The half-life of a radioactive substance is 2 seconds. Calculate the decay constant.

A particle of charge q and mass m moving with a velocity v enters a uniform magnetic field B in the direction of the field. The force on the particle is

When electrical power is transmitted over long distances, the voltage is stepped up so that

What is the coefficient of static friction between a load of mass 2kg and a horizontal surface, if the limiting frictional force is 10N? (g = 10 ms-2)

A gas occupies a certain volume at 27°C. At what temperature will its volume be twice times the original volume assuming that its pressure remains constant?

Which of the following is used in a nuclear reactor to slow down fast moving neutrons?

When a metal is heated to a high temperature, electrons are emitted from its surface. The process is known as

A piece of stone weights 180 N in air and 150 N in a beaker containing 160 N of methylated spirit. What is the up thrust exerted on the stone?