The formula length x width x height is used to calculate the volume of a type of

Two particles of masses m and 2m are placed on a smooth horizontal table. a string, which joins these two masses, hangs over the edge supporting a pulley, which suspends a particle of mass 3m.the pulley has negligible mass. the two parts of the string on the table are parallel and perpendicular to the edge of the table. the hanging parts of the string are vertical. find the acceleration of the particle of mass 3m.

Name three different units of energy used to measure heat and describe what type of situations each is usually used.

Work out sian speed for the first 30 minutes of her journey. give your answer in km/h.