A boy pushes on a parked car with a force of 200 n. the car does not move. how much work does the boy do on the car?

What are the kingdoms of eukaryotes?

Which of the following statements is true about magnetic fields. The earth's magnetic field is confined within the core of the earth. Magnetic fields are unreliable for use in navigation.

What is the mass of a dog if it accelerates at 15 m/s^2 and has a force of 50 N?

What percent of sample of AS-198 to decay to 1/8 its original

Based on what you've learned about heat energy, explain the factors that would determine how quickly a piece of meat cooked on a barbecue grill. Why would the amount of water in the meat affect the speed of cooking?

How are magnetic poles and electrical charges similar? A. Their same forces repel each other, and their opposite forces attract each other. B. Their same forces attract each other, and their opposite forces repel each other. C.

As part of his meal, a workman has a cup containing a hot drink. In order to keep the drink hot whilst he eats the rest of his meal, he covers the cup, as shown in the figure. Which sources of energy loss does this action reduce? Tick two boxes.

When energy is transformed, the amount of usable energy?

If an object weighs 39.2 n on earth, what is its mass

What happens when pressure is applied to a solid.