PLEASE HELP WITH THOSE TWO QUESTIONS. 1) A 855 kg car pushes on the road with 5450 N of force. What is the magnitude of the force the road exerts back on the car, and what is the acceleration of the car?

2) A 68.0 kg baseball player throws a 145 g baseball directly east. He throws the baseball with a force of 4.40 N. What is the resulting acceleration of the player?

What do you think car designers do if the damage caused by a crash test is too severe?

An ice-making machine inside a refrigerator operates in a carnot cycle. it takes heat from liquid water at 0.0 degrees celsius and rejects heat to a room at a temperature of 19.2 degrees celsius. suppose that liquid water with a mass of 76.3kg at 0.0 degrees celsius is converted to ice at the same temperature. take the heat of fusion for water to be l_f = 3.34*10^5 j/kg.how much energy e must be supplied to the device? express your answer in joules.

Which best describes the first law of thermodynamics as compared to the second law of thermodynamics? a. the first law describes how thermal energy is conserved but not the direction it moves. b. the first law describes the direction thermal energy moves but not how it is conserved. c. the first law describes how thermal energy can be created but not how it can be destroyed. d. the first law describes how thermal energy can be destroyed but not how it can be created.