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?

Which explains how the ocean warms the air? A. The seawater absorbs heat from the sun and warms the air above it by convection. B. The seawater absorbs heat from the sun and warms the air above it by conduction. C.

Which of the following shows kinetic energy being converted into potential energy? A) a boulder rolling across the ground B) a rock being tossed high into the air C) a boulder falling off the edge of a cliff D) a rock sitting in the grass

A top-fuel dragster starts from rest and has a constant acceleration of 42.0 m/s2. What are (a) the final velocity of the dragster at the end of 1.8 s, (b) the final velocity of the dragster at the end of of twice this time, or 3.

Which variable goes on the x-axis? A. the controlled variable B. the independent variable (manipulated variable) C. the depenedent variable (responding variable)

If a ball is given an initial speed of 15 m/s on a horizontal, frictionless surface, how fast will the ball be rolling in 5 seconds?

The velocity of a roller coaster as it moves down a hill is where v0 is the initial velocity and h is the vertical drop in feet. An engineer wants a new coaster to have a velocity of 90 feet per second when it reaches the bottom of the hill.

What are sun spots?

Identify characteristics of objective personality tests. -self-report -scientific -paper-and-pencil -questions about behavior -objective -potentially biased answers Multiple Choice-Psychology

The Pony Express was a mail delivery system in the Old West that used a series of men on horseback to deliver mail from St. Joseph, MO to Sacramento, CA along a trail that was 2000 miles long.

In the virtual lab, calculations were made of the predicted diffraction angle, using the formula θ ≈ StartFraction lambda over L EndFraction.