When a warm air mass is trapped between two cooler air masses, it is called a/an

A. warm front

B. cold front

C. occluded front

D. stationary front

What are at least two reasons why some people claim the Pyramids of Giza were constructed by aliens?

Samantha pulls a wagon with her dog in it. The mass of the wagon and the dog together is 45kg. The wagon accelerates at a 0.85m/s2. What force is Molly pulling the wagon with.

What is the amplitude of a wave related to

Do covalent substances ionize while dissolving? yes no sometimes

A fixed mass of an ideal gas is heated from 50°C to 80°C (a) at constant volume and (b) at constant pressure. For which case do you think the energy required will be greater? Why?

Which force is the more dominant one in the hydrogen atom, the gravitational or the electrical? by what factor?

Name the elements from which nichrome can be made.

The power output of a typical large power plant is 1000 megawatts (MW). Express this result in W, kW, and GW

During an experiment, a toy car accelerates forward for a total time of 5s. Which procedures could a student use to determine the average net force exerted on the car during the 5s that the car accelerates?

What is the law of conversation of energy?