Which of the following is example of direct observation

As a roller coaster car starts down a slope, it's velocity is 4m/s. But 3 seconds later it's velocity is 22m/s in the same direction. What is its acceleration

Two forces, 80 N and 100 N, acting at an angle of 60 ° with each other, pull on an object. (a) What single force would replace the two forces? (b) What single force (called the equilibrant) would balance the two forces? Solve algebraically.

What would happen If a scuba tank heats up

If a 75 W lightbulb operates at a voltage of 120 V, what is the current in the bulb?* A. 1.6A B. 9000 A C. 195 A D. 0.63 A

On a transverse wave, the crest isa. the highest part of the wave. b. the lowest part of the wave. c. the resting position of the wave.

Analyze what happens to the air pressure as you increase in the altitude. How might this affect athletes who compete at higher altitudes?

Some windows are made with a single pane of glass. Other windows are made out of two panes that have a tiny pocket of air trapped between them.

Katrina inserts a key into her car ignition she turns the key putting her car into ignition mode. In thos mode energy is used to increase the temperature of the cars fuel this energy allows fuel to combust and the car to move.

Monochromatic light passes through two parallel narrow slits and forms an interference pattern on a screen. As the distance between the two slits is decreased, the distance between light bands in the pattern on the screen will a. decrease. b.

The voltage in a battery is 9 volts. The resistance is 3 ohms. What is the current?