How much heat is needed to melt a 3 kg block of cheddar cheese initially at room tmperature of 24 degrees c? (assume the melting point of cheddar cheese is 150 degrees c, the latent heat of fusion of cheese is 124 kj/kg and the specific heat of cheddar cheese is 2.08 kj/kg c)

You are driving to the grocery store at 20 m/s. you are 110m from an intersection when the traffic light turns red. assume that your reaction time is 0.50s and that your car brakes with constant acceleration. how far are you from the intersection when you begin to apply the brakes? what acceleration will bring you to rest right at the intersection? how long does it take you to stop after the light changes? the known values: vi=20m/s xi=110m t=.50s vf=0m/s xf=0m a=?