What are concave and convex mirrors?

Which definition is correct and uses only quantities rather than units? A. Density is mass per unit volume B. potential difference is energy per unit current C. Pressure is force per unit area D. speed is distance travelled per second

Wavelength is 625 nm what is the frequency?

How can sounds be vibrations?

The opposite poles of two magnets will do which of the following a. attract one another B. repeal one another c. attract or repel one another depending on orientation d. not interact with one another

If there are 400 N and there is a mass of 100 kg, what is acceleration?

Our 12 V car battery does not appear to be functioning correctly, so we measure the voltage with a volt meter and find that the voltage on the battery is only 9V.

A strong lightning bolt transfers about 27.88 C to Earth. How many electrons are transferred? The elemental charge is 1.602 * 10-19 C. The lightning bolt discharge lasts one millisecond.

What is the speed of a bobsled whose distance-time graph indicates that it traveled 121m in 26s? m/s

Which formula describes newton's second law of motion?

Which statements regarding the sun's nuclear fusion are true? select all that apply. a. nuclear fusion only occurs in the core. b. hydrogen fuses to form helium. c. fusion in the sun will continue for at least 1 trillion more years. d.