34

SE

selenium

78.94

How many protons (atomic number) does the element shown contain in each of its atoms?

A)

68

B)

34

C)

17

D)

78.94

If a 375 mL sample of water was cooled from 37.5 C to 0 C how much heat wad lost in joules

A car accelerates at a rate of 3 m/s^2. If it's original speed is 8 m/s, how many seconds will it take the car to reach a final speed of 26 m/s?

A radio wave has a frequency of 5.5 * 10Ê hertz and travels at a speed of 3.0 * 10§ meters/second. What is its wavelength?

What is the speed of a car that travels 150km in 3.00 hrs?

Is sugar cane a renewable or non-renewable source of energy? And why?

Imagine that you replace the block in the video with a happy or sad ball identical to the one used as a pendulum, so that the sad ball strikes a sad ball and the happy ball strikes a happy ball.

Under what conditions will an object experience a gravitational force? Under what conditions will an object experience an electric force? Under what conditions will an object experience a magnetic force?

A basketball player pushes down with a force of 34 N on a basketball that is inflated to a gauge pressure of 9 x 104 Pa. What is the diameter of contact between the ball! and the floor?

Match these terms with their definitions: 1. unit of electrical resistance ampere 2. unit of electromotive force or electrical potential ohm 3. unit for measuring the strength of an electric current volt 4. unit of electrical power watt

In which is momentum conserved: an elastic collision or an inelastic collision?