A scientist investigated how the maximum muscle power of humans varies with age and gender. The scientist asked volunteers to stand on a platform and to jump as high as they could.
Figure 4 shows a volunteer taking part in the experiment. Figure 4
An electronic timer measured the time that the volunteer was in the air.
The muscle power in watts per kg is calculated using the following equation:
muscle power = 9.8 × jump height time
One volunteer has a muscle power of 41 W/kg He was in the air for 0.12 s
0 3 . 1
Calculate his jump height.

c)as speed changes, wavelength and frequency change.

everything changes!

answer;

d. are made mostly of liquid

explanation;

-the general   composition and structure planets includes; they have a thick gas and liquid layer covering a small,solid core. mostly the gases are hydrogen and helium atmosphere and layers of liquid hydrogen. for instance neptune and uranus are examples of the outer planets, they have a core covered by ice and ammonia.

-neptune's atmosphere is hydrogen and helium with a bit of methane so there is no oxygen to breath and the interior is made up of frozen water and ammonia with a rock and iron core. thus, there is no liquid water or solid surface to survive.