Calculate the energy needed to heat 4 kg of water from 25°C to 45°C.

heat =

80 Kcal

100 Kcal

180 Kcal

280 Kcal

4. A latch holding a cart in place, hanging high above the ground, breaks and the cart falls. The cart started from rest and is in free fall until it hits the ground. a. What is the velocity after 3.2 s? b. How far has the cart fallen at 3.2 s?

What did galileo see when he observed venus through his telescope?

Willie's class found that the cart will move when pushed with 50 Newton's of force. When Willie pushes on the cart with 10 Newton's of force, why didn't the cart move?

One molecule of carbon monoxide contains 1 carbon atom and 1 oxygen atom. Which of these is the chemical formula for 4 molecules of carbon monoxide? A) CO4 B) 4CO C) CO4 D) C4O4

What are the two factors that determine the strength of the force of friction between two sliding objects?

Could a nucleus that has one proton but no neutrons exist?

Which physical quantities has the unit kg·m·s-1?

Can an object travel at the speed of light? Why or why not?

Determine the amount of potential energy of a 5 Newton's book that is moved to three different shelves on a bookcase. The height of the shelves is 1.0 meter, 1.5 meter, and 2.0 meter

Which atom is involved in giving your heart energy to beat? carbon gold oxygen iron