5. Granite has a specific heat of 800.J/g °C. What mass of granite is needed to store 1.50 x 10 J of heat if the
temperature of the granite is to be increased by 15.5°C?

Spend time observing or thinking about events that involve matter and energy. which events can you explain? which events can’t you explain?

What is the magnitude of the resultant vector round your answer to the nearest tenth

The motor m applies a time-varying force of f (200 t) n, where t is in seconds. box b with mass 200 kg starts from rest, and the coefficients of kinetic and static friction are 0.2 and us 0.3 the acceleration due to gravity is g 9.8 m/s2 b 300 a) find the time ' when the box starts to move. b) calculate the speed of the crate at 3 s c) calculate the power delivered by the motor at t 3 s