A car covers first half of the distance between two places at a speed of 40 km/h and the second half at 60 km/h. What is the average speed of the car?

An object is represented by the dot on a motion map. What is the best description for the motion of this object? The object is moving with a constant speed. The object is moving with a constant acceleration. The object is standing still.

What is the purpose of a voltage source? A. It removes insulators in a circuit so electrical charges flow freely. B. It increases the potential energy of electrical charges to produce a current. C.

True or false a fuel resource can be replaced in an reasonably short time called a nonrenewable resource.

Jack and Jill have made up since the previous HW assignment, and are now playing on a 10 meter seesaw. Jill is sitting on one end of the seesaw, while Jack is some distance (d) from the fulcrum on the other side.

Which statement describes the relationship of resistance and current? 1. Resistance is directly proportional to current because R =. 2. Resistance is inversely proportional to current because R =. 3.

Katie runs 6 km in 0.6 hour, then 5 km in 0.5 hour. Katie's average speed is __ per hour.

A derived unit is a combination of fundamental units. Which of the following is an example of a derived unit? a) centimeter (used to measure distance) b) gram (used to measure mass) c) cubic centimeter (used to measure volume)

Technician A says that a heater core leak can be the result of the coolant wearing a hole through the core. Technician B says that a core leak can be caused by chemical action eating a hole through the core. Who is correct?

If the Coast Guard warns of a giant wave of water approaching the shore as a result of a major earthquake, they are warning of a. an aftershock. b. liquefaction. c. a tsunami. d. landslides.

What is the total number of atoms in the following formula? CaBr2 4 3 2 1