4marks phy

. (a) Define specific heat capacity. A calorimeter at 15 ℃ contains 0. 1 kg of carbon. The calorimeter is made
of aluminum and its mass is 0.02 kg. When 892 J of heat is added to the calorimeter and carbon, the
temperature increases to 28 ℃ . Find the specific heat capacity of carbon. Assume that the specific heat
capacity for aluminum at said temperature range is 900 J kg-1 K-1. (3 marks )
(b) A radar antenna of a wave with frequency 1000 Hz and wavelength 0.5 m. (3 marks )

1. (a)The glancing angle of a ray incident on a plane mirror is 60° . Find the angle between the incident ray and
   the new reflected ray when the plane mirror is rotated(a) through 15° in the clockwise direction,(b)through
   30° in the anticlockwise direction. (3 marks )
   (b) A 60 kg woman is on a diet that provides her with 1.046 J daily . If this amount of heat is added to 60 kg
   of water at 37° C what will be the final temperature of the water? (3 marks )