Agasoline engine operates at a temperature of 270â°c and exhausts at 180â°c. calculate the maximum efficiency of this engine. (note that the celsius scale is used.) 83.0 % 33.3 % 17.0 % 16.6 %

Efficiency of gasoline engine is 16.6 %

Explanation:

It is given that,

A gasoline engine operates at a temperature of, T₁ = 270 C = (270 + 273) K = 543 K

It exhausts at a temperature, T₂ = 180 C = (180 + 273) K = 453 K

The efficiency of this engine is given by :

or

So, the efficiency of this engine is 16.6 %.Hence, the correct option is (d).

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.