12 (b) The apparatus is then set up as shown in Fig. 1.3.
The rule is at a small angle to the bench.
2
metre rule
hook
zero mark
bench
Fig. 1.3
A student measures the length of the stretched spring and obtains the result
12 = . 4.4 cm.
(i) He then places a metal block X with its centre at the 40.0 cm mark on the rule.
Explain briefly how the student can make sure that the block is in the correct
position. You may wish to use a diagram.

How do hydroponic plants differ from nonhydroponic plants? a.) hydroponic plants can grow in a dryer soil. nonhydroponic plants grow in moist soil. b.) hydroponic plants grow on other plants and are known as air plants. nonhydroponic plants do not grow on other plants. c.) hydroponic plants can only grow in rain forests. nonhydroponic plants cannot grow in rain forests. d.) hydroponic plants are grown without soil. nonhydroponic plants are grown in soil.

The slope of a velocity time graph over any interval of time gives the during that interval

Matter that emits no light at any wavelength is called