Halfway though a cross-country meet, a runner's speed is 4m/s. In the last stretch, she increases her speed to 7m/s. What is her change in speed?

What factors affect how strong the electric force is between two charged objects

A wheel on a watermill turns halfway every 4.0 s. What is the wheel's angular velocity? A. 0.39 rad/s B. 2.5 rad/s C. 3.1 rad/s D. 0.79 rad/s E. 13 rad/s

When water condenses onto the grass in the early morning when the air is clear

Xander was traveling at a velocity of 4.5 m/s and 3.5 seconds. Finley was traveling at a velocity of 3.6 m/s for 4.2 seconds. Max was traveling at a velocity of 7.3 m/s for 1.2 seconds. They all started at the same location.

Name two instruments that are based on the law of flotation

A ball of mass 200 g rolls along the ground at a speed of 5.2m/s. calculate the kinetic energy of the ball. Give answer to one decimal place.

A light bulb that is connected to a 120 V source drawers 1.7 A. What is the resistance of the light bulb? A. 14 B. 71 C. 200 D. 0.014 E. 0.0

Which of the following is an example of heat transfer through radiation? A. A pot of soup warming on a hot burner. B. A crayon melting on a hot sidewalk. C. Beach sand getting warmed by the sun. D. An egg getting cooked in a pot of boiling water.

Which of the following best describes each particle? A. Protons are negative, neutrons are neutral, and electrons are positive. B. Protons are neutral, neutrons are positive, and electrons are negative. C.

During World War II, both the Allied and Axis powers used propaganda to A. weaken public support for the war. B. downplay public opinion. C. manipulate the public through the use of humor. D. shape public support of the war