In order to move a bag of dog food across a 10 meter room, you apply 20 newtons of force. How much work was done?

2 joules

10 joules

30 joules

200 joules

3. Can there be forces acting on an object at rest? Explain why or why not.

how many joules of heay are needed to raise the temperature of 10.0 g of aluminum from 22°c to 55°c, if the specific heat of aluminium is 0.90J/g°c

The specialty of an athlete on the women's track team is the pole vault. She has a mass of 48 kg and her approach speed is 8.9 m/s. When she is directly above the bar, her speed is 1.6 m/s.

Earth has retained a lot of internal heat primarily because of its (a) distance from the Sun; (b) large iron core; (c) relatively large size.

If you were making a tool used to handle live electrical wires which class of materials would you most likely use?

Suppose a body has a mass of 60 kilograms and a velocity of 2 meters per second upward. What is the linear momentum?

Reflection and abssorption prevent some

Why is it important to change only one experimental variable at a time in an experiment?

A 0.0663 kg ingot of metal is heated to 241◦C and then is dropped into a beaker containing 0.395 kg of water initially at 25◦C. If the final equilibrium state of the mixed system is 27.4 ◦C, find the specific heat of the metal.

What does it mean when we say an atom has decayed?