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.

is there supposed to be a picture?

answer: the correct answer is 1.

explanation: there are various process in which a radioactive nuclei decays:

1) alpha decay: in this process, a heavier nuclei decays into lighter nuclei by releasing alpha particle. the mass number is reduced by 4 units.

2) electron capture: in this decay process, a parent nuclei absorbs an electron and gets converted into a neutron. simply, a proton and an electron combines together to form a neutron. mass number does not change in this process.

3) gamma ray emission: it is a decay process in which an unstable nuclei gives excess energy by a spontaneous electromagnetic process. this decay releases . this process does not change the mass number.

4) positron emission: it is a type of decay process, in which a proton gets converted to neutron and an electron neutrino. this is also known as -decay. in this the mass number remains same.

from the above information, we see that only alpha-decay is producing a change in the mass number of the nucleus.

the current is 0.6

voltage ÷ resistance = current

so 12 ÷ 20 = 0.6

wavelength divides in half and speed stays the same.