A car travels from Boston to Hartford in 4 hours. The two cities are 240 kilometers apart. What was the average speed of the car during the trip?

A. 4 km/hour

B. 36 km/hour

C. 960 km/hour

D. 60 km/hour

Which best describes how the diagram illustrates both laws of thermodynamics? First law: High-temperature steam flows to an area of lower temperature in the turbines. Second law: Thermal energy is used to do work on the turbines.

The top priority in a lab setting is a. safety b. conducting a great experiment c. obtaining a good experimental result d. designing a well thought out experiment

Why is it important that radioisotopes used in diagnostic tests have short half-lives? 20 A) These radioisotopes have a greater activity so they B) This minimizes the harmful side effects of the radiation.

What cause air pressure? Why do aircraft need pressurized cabins?

If you looked at the frequently spectrums of two friends saying the word dog, would they look the same or different ?

The sun generates both mechanical and electromagnetic waves. Which statement about those waves is true? The mechanical waves reach Earth, while the electromagnetic waves do not.

A 3-kg mass is in free fall. What is the velocity of the mass after 7 seconds?

How does the role of blood protect the body

What is the objects velocity if the momentum is 6.0 kg•m/as

Which of the following scientists did not support the wave motion of light? A. Fresnel B. Maxwell C. Newton D. Arago