How much energy would be required to increase the temperature 9kg of aluminium (specific heat capacity = 899J/kg°C) by 64°C?

What is the mass of the same rock on the earth

At time t=0, a particle is located at the point (3,6,9). it travels in a straight line to the point (5,2,7), has speed 8 at (3,6,9) and constant acceleration 2i−4j−2k. find an equation for the position vector of the particle.

What are two different ways you could find the value of a? explain these methods.