A spring is suspended from a fixed point and a force is applied. The position of a pointer attached to the bottom of the spring against a vertical ruler is recorded. Before the force is applied, the position of the pointer is (225 ± 2) mm. After the force is applied, the position of the pointer is (250 ± 2) mm. The extension of the spring is determined. What is the percentage uncertainty in the extension?

Four students measure a time interval that is known to be 1.734 s. The measurement recorded by each student is shown.…

The table shows some measurable quantities. Which row gives the correct order of magnitude of the measurable quantity…

A byte (b) comprises 8 bits. How many bits are there in 1 terabyte (1Tb)?

The incomplete nuclear equation for one possible reaction that takes place in the core of a nuclear reactor is ⁹²²³⁵U…

A person of mass 60 kg stands on accurate bathroom scales, placed on the floor of an elevator (lift) which operates i…

A particle is in a uniform field. The particle experiences a force in the opposite direction to the field. In which t…