Larry's gravitational potential energy is 1870jas he sits 2.20
m above the ground in a sky diving airplane. what is larry's
gravitational potential energy when he begins tojump from the
airplane at an altitude of 923m?

Larry's  potential energy when he jump from the airplane = 784507.54 J

Explanation:

Potential Energy: This is the energy possessed by a person by virtue of it position. The S.I unit of Energy is Joules. Mathematically it is represented as,

Ep = mgh Equation 1

m = Ep/gh Equation 2

Where Ep = potential energy, m = mass of the body, g = acceleration due to gravity, h = height.

constant: g = 9.8 m/s²

When he sits 2.20 m above the ground,

Ep = 1870 J

m = 1870/(2.2×9.8)

m = 86.73 kg.

When he begins to jump from the airplane,

h = 923 m, g = 9.8 m/s² and m = 86.73 kg

Substituting these values into equation 1

Ep = 923×9.8×86.73

Ep = 784507.54 J

Therefore Larry's  potential energy when he jump from the airplane = 784507.54 J

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.

object 2 because all the other ones are wrong