Which statement explains the first law of thermodynamics?

Heat is created, but not destroyed or transformed.

Heat is transformed, but not created or destroyed.

Heat is destroyed, but not created or transformed.

The right answer among the options is that: Heat is transformed, but not created or destroyed.

Explanation:

The First Law of Thermodynamics states that heat is a form of energy, and that thermodynamic processes are subject to the principle of conservation of energy.

This implies that heat energy cannot be created or destroyed. However, energy can be transferred from one location to another and converted to and from other forms of energy.

Thus, the right answer among the options is that:Heat is transformed, but not created or destroyed.

c)as speed changes, wavelength and frequency change.

everything changes!

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.