Jeff’s father is installing a do-it-yourself security system at his house. he needs to get a device from his workshop that converts electric energy to sound energy. which device is jeff’s father looking for? a. switch b. motor c. buzzer d. bulb e. battery

C). Buzzer

Explanation:

In electric buzzer is a device which produce sound of high amplitude when electric current flows through it.

As per the concept of energy we know that the electrical energy when given to the buzzer then the electrical energy is converted into sound energy.

So here we can say that the correct answer here is

C).Buzzer

while in other options

B) Motor : Electrical energy is converted into mechanical energy

D) Bulb : electrical energy is converted into light energy

E) Battery : Chemical energy is converted into electrical energy

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.