Suppose a car is moving in a straight line and steadily increases its speed. It moves from 35 km/h to 40 km/h the first second and from 40 km/h to 45 km/h the next second. What is the car acceleration?

True or False Temperature is the flow of heat energy from one object to another.

What connects our muscles to our bones?

A 200-kilogram wood crate is pushed across a wood floor How much force will be needed to move the box at a constant velocity of 0.5 m/s

Food has chemical potential energy, which is the energy stored in the bonds between two atoms. This energy is released when what occurs?

Which if the following choices defines energy in scientific terms? A. the motion of an object B. a force used in an object C. the ability to do work D. a change in temperature

If the resistance of a circuit increases, that means that the current has to

One watt is equal to which of these values? 1 joule/hour 1 joule-hour 1 joule/second 1 joule-second

What are some of the benefits of learned optimism that have been found in research? O A. Fewer health problems O O B. All of these C. Making more money O D. A lower divorce rate

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)