The longer coffee sits on a desk, the cooler it becomes.

True or False? The length of time on the desk is a function of the temperature of the coffee.

A.

True

B.

False

Which describes what happens when fuel is ignited in a heat engine? Chemical energy is converted into thermal energy. Thermal energy is converted into solar energy. Solar energy is converted into chemical energy.

An object is thrown vertically upward with an initial velocity of 50 m/s. Find a) the maximum height reached by the object. b) the time taken to reach this height. (neglect the effect of air resistance).

Do you have to take physics to graduate high school?

What is the advantage of designing a thermos so that it has a vacuum layer surrounding the area where hot liquids are stored?

Car A travels along a freeway at 110kmh-1 going east. Car B, travelling west at 120kmh-1 spins out of control and veers towards Car A (across the median strip) at an angle 30° off course. a. What is the velocity of Car B relative to Car A?

While playing with her 5 year old cousin, a Physics 135 student pushed him forward on his scooter. She pushes with a force of 50 Newtons for 3.5 seconds. If the boy and the scooter together have a mass of 30 kg, what is their final velocity? a. 2.

3. A 120.0 V generator supplies 3.0 kw of power. How much current ca the generator deliver?

An apple drops from a tree and hits the ground in 1.5s what is its speed just before it hits the ground?

Sound travels slow in cold air. Why does the speed of sound depend on air temperature?

A tow truck pulls a 500 kg car so that the car accelerates 2 m/s2. What is the net force on the car? 250 N 498 N 1000 N 502 N