The specific heat capacity of copper is 400j/kg/k. A piece if copper ball of mass 20g at 200 degrees Celcius is placed in a copper calorimeter of mass 60g containing 50g of water at 30degrees Celcius, ignoring heat losses, calculate the final steady temperature of the mixture. (Specific heat capacity of water =4.2j/g/k)

Which of the statements about waves is true? a. in longitudinal waves, particles move perpendicular to the direction the wave is traveling.b. both transverse and longitudinal waves can travel through water c. electromagnetic waves are a type of longitudinal waves.d. in a transverse wave, particles move parallel to the direction the wave is traveling.

The 20@kg wheel has a radius of gyration about its center g of kg = 300 mm. when it is subjected to a couple moment of m = 50 n # m, it rolls without slipping. determine the angular velocity of the wheel after its mass center g has traveled through a distance of sg = 20 m, starting from rest.

Jackson is designing a new heater, and he wants to experiment with different thermally conductive materials. which of these materials would be useful in conducting heat?