4)which of the following best refers to an air mass that forms over tropical land ?
a) tc
b)ac
c) te
d) pm

5) which of the following best defines a warm front ?

a) place where warm air sinks under cold air
b) place where warm air meets cold air and both stay still
c) place where warm air pushes down cold air
d) place where warm air rises over cold air.

8) a low pressure system usually brings clouds and rain
a) true
b) false

First, launch the video below. you will be asked to use your knowledge of physics to predict the outcome of an experiment. then, close the video window and answer the question at right. you can watch the video again at any point. part a as in the video, we apply a charge +q to the half-shell that carries the electroscope. this time, we also apply a charge –q to the other half-shell. when we bring the two halves together, we observe that the electroscope discharges, just as in the video. what does the electroscope needle do when you separate the two half-shells again? view available hint(s) as in the video, we apply a charge + to the half-shell that carries the electroscope. this time, we also apply a charge – to the other half-shell. when we bring the two halves together, we observe that the electroscope discharges, just as in the video. what does the electroscope needle do when you separate the two half-shells again? it deflects more than it did at the end of the video. it deflects the same amount as at end of the video. it does not deflect at all. it deflects less than it did at the end of the video. submit

In automobile steering wheel is shown what is the ideal mechanical advantage blank? if the ama is eight what is the efficiency of the steering wheel?

According to the image below, which season is about to begin in the southern hemisphere? a. summer b. autumn c. winter d. spring