Question 6 A soccer player juggles a ball on his head by letting the ball bounce
continuously on his head. After the last bounce the ball leaves his head it
takes the ball 2,4 seconds to reach the ground
6.2 Calculate the maximum height, above the boy's head reached by the
ball. (0,63 m)
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leaves his head it

takes the ball 2,4 seconds to reach the ground

6.2 Calculate the maximum

Explanation:

r juggles a ball on his head by letting the ball bounce

continuously on his head. After the last bounce the ball leaves his h

c.is a substance that requires a small amount of energy per gram to raise its temperature; has strong cohesive forces between molecules.

explanation:

a colorless, transparent, odorless liquid that forms the seas, lakes, rivers, and rain and is the basis of the fluids of living organisms.

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.