The table shows the results of an experiment to stretch an elastic card. Copy and complete the table, and draw a graph to represent this data.

Load/N	Length/mm	Extension/mm
$0.0$	$50$	$0$
$1.0$	$54$
$2.0$	$58$
$3.0$	$62$
$4.0$	$66$
$5.0$	$70$
$6.0$	$73$
$7.0$	$75$
$8.0$	$76$

The results of an experiment to stretch a spring are shown in table. Use the results ti plot an extension-load graph. On your graph, mark the limit of proportionality and state the value of the load at that point.

Name an instrument that is used to measure:

Atmospheric pressure.

Name an instrument that is used to measure:

Differences in pressure.

The diagram shows two closed tanks, A and B. Each tank contains gas and is fitted with a manometer to show how the pressure compares with atmospheric pressure outside the tank.

In which tank is the gas pressure greater than atmospheric pressure$?$ Explain how you can tell.

The diagram shows two closed tanks, A and B. Each tank contains gas and is fitted with a manometer to show how the pressure compares with atmospheric pressure outside the tank.

What can you say about the pressure of the gas in the other tank$?$