A ball is released from rest. The distance the ball falls and the time the ball takes to fall that distance are both measured. The percentage uncertainty in the measured distance is negligible. The percentage uncertainty in the measured time is 4%. The distance and the time are then used to calculate the acceleration of free fall. Air resistance is negligible. What is the percentage uncertainty in the calculated value of the acceleration of free fall?

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…