1. An electric current of 0.028 A flows through a vacuum tube. What is

a) the amount of charge

b) the number of electrons

passing through the tube in 75 s?

A ball of mass 0.16 kg is moving forwards at a speed of 0.50 m/s. A second ball of mass 0.10kg is stationary. The first ball strikes the second ball. The second ball moves forwards at a speed of 0.50 m/s.

What does the big bang theory explain? A. How the universe began B. How the universe will end C. How energy is created through fusion D. How our solar system formed

A driven gear with 60 teeth is driven by a driven gear of 30 teeth what is the VR of the gear

When the amplitude of a wave triples, the intensity changes by a factor of [blank] (1/3,1/9,3,9) When the amplitude of a wave is cut in half, the intensity changes by a factor of [blank] (1/4,1/2,2,4) When the distance between the source and your

What is the SI unit of pressure? A. g/cm3 B. the pascal C. the newton D. m/s2

A 111.6 g sample of iron was heated from 0°C to 20°C. It absorbed 1004 J of energy. What is the specific heat capacity of iron?

A car is driving towards a brick wall at a constant velocity (don't try this at home!) and the driver honks the horn of the car. the sound of the horn reflects from the wall and the echo is heard by the driver.

Mass number of an atom with 11 protons

Which of the following elements is the most reactive? Beryllium Calcium Magnesium Barium

A flash of white light containing all the colors of the visible spectrum in air shines straight down on the surface of a pool.