A student uses the volume of a metal coin in order to determine the density of the metal. What is not needed in order to determine an estimate of the volume of the coin?
estimate of the diameter
estimate of the mass
estimate of the thickness
use of the formula for the volume of a cylinder
A student wishes to measure a distance of about 10 cm to a precision of 0.01 cm. Which measuring instrument should be used?
metre rule
micrometer
tape measure
vernier calipers
What is not a statement of one of Newton’s laws of motion?
If body X exerts a force on body Y, body Y exerts an equal and opposite force on body X.
If no resultant force acts on a body it has constant velocity.
The rate of change of momentum of a body is proportional to the resultant force acting on it and takes place in the direction of the force.
The total momentum of a system of interacting bodies is constant if there is no external force.
A ball is thrown vertically upwards. Air resistance is negligible. Which statement is correct?
By the principle of conservation of energy, the total energy of the ball is constant throughout its motion.
By the principle of conservation of momentum, the momentum of the ball is constant throughout its motion.
The kinetic energy of the ball is greatest at the greatest height attained.
The potential energy of the ball increases at a constant rate during its ascent.
Light of a single frequency is incident on a diffraction grating. Seven bright spots are observed on a screen. Which change will result in an increase in the number of bright spots observed?
Increase the distance between the grating and the screen.
Increase the frequency of the incident light.
Increase the intensity of the incident light.
Increase the number of lines per metre in the grating.
What is a conclusion from the alpha-particle scattering experiment?
Protons and electrons have equal but opposite charges.
Protons have a much larger mass than electrons.
The nucleus contains most of the mass of the atom.
The nucleus of an atom contains protons and neutrons.
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