Thursday, 14 August 2014


                                                  Atmospheric pressure

1. Explain how rubber suckers could be used to help lift panes of glass safely.

2. If you wanted to hang from the ceiling using a rubber sucker how big would it have to be?

(Assume a perfect vacuum in the sucker. Take atmospheric pressure to be 100 000 Pa and use

your own weight in Newtons Take g for the Earth as 10 N/kg).

3. On of the windows in a plane flying at high altitude breaks. Explain what happens.

4. Water has a lower density than mercury. Is the column of liquid in a mercury barometer taller or

shorter than one in a barometer using water?

5. If the density of water is 1000 kg/m3

column of water in a perfect water barometer be. (Take g for the Earth as 10 N/kg)

6. Explain what would happen to an astronaut doing a space walk if their space suit was

7. What would happen to the mercury level in a mercury barometer if:

(a) the atmospheric pressure went down

(b) the atmospheric pressure went up

(c) a little air leaked into the tube above the mercury

(d) the barometer was taken up a high mountain

(e) the temperature of the room where the barometer was got higher

[Remember that mercury is a dangerous substance. It should not be used by pupils and you

 and atmospheric pressure is 100 000 Pa how high will the

8. A high altitude weather balloon is partly inflated on the ground. What would happen to it as it rose up through the air? Explain your answer using a diagram as well if you wish.

9.Explain what is meant by
(a) a millibar (b) an isobar (c) a cyclone (d) an anticyclone