What's the efficiency of a car that uses 400,000 J of energy from gasoline to make 48,000 J of kinetic

energy?

A 20.0 kg block of ice is sitting in a cooler. The temperature of the ice is 0.0_C when it is put into the cooler. As it melts, how much heat does the block of ice absorb? a. 8.68 X 10^4 J c. 2.36 X 10^4 J b. 6.68 X 10^6 J d. 3.68 X 10^6 J

A person runs at a constant speed around a 100m diameter circular track and completes each lap in 60 sec. What is the magnitude of the runner's average velocity for one fourth of a lap?

A wave has a wavelength of 10 mm and a frequency of 5 hertz. What is its speed? a. 50 mm/s b. 50 hertz's c. 2 mms d. 0 0.50 mms

Convert the filling metric measurements 59.97 Kg to g

Which of these forces could speed up a baseball? A) Applied and Frictional forces B) Applied and Gravitational forces C) Frictional and Gravitational forces

A closed container is filled with oxygen. the pressure in the container is 425 kpa. what is the pressure in millimeters of mercury? express the pressure numerically in millimeters of mercury.

Which do you think would be warmer on a winter day when there is no wind a thick forest or a grassy field? explain your answer

Which of the metals is the best conductor of heat? How do you know?

Which of the following is a balanced chemical equation?

An object is moving to the left with a constant speed. What can be concluded about the forces acting upon the object?