Question : One calorie of heat energy is equivalent to approximately ____________ joules of mechanical energy.

Option 1: 0.24

Option 2: 0.48

Option 3: 2.4

Option 4: 4.2

Question : Which of the following is the correct statement?

Option 1: Joule is the unit of work

Option 2: The unit of energy is the watt.

Option 3: Joule/ second is also a unit of energy.

Option 4: The unit of power is joule/newton.

Question : The fraction equivalent to $\frac{1}{5} \%$ is:

Option 1: $\frac{1}{125}$

Option 2: $\frac{1}{200}$

Option 3: $\frac{1}{40}$

Option 4: $\frac{1}{500}$

Question : If $W_{1}:W_{2}= 2:3$ and $W_{1}:W_{3}= 1:2$, then $W_{2}:W_{3}$ is:

Option 1: 3 : 4

Option 2: 4 : 3

Option 3: 2 : 3

Option 4: 4 : 5

Question : If $\sin \beta=\frac{1}{3},(\sec \beta-\tan \beta)^2$ is equal to:

Option 1: $\frac{3}{4}$

Option 2: $\frac{2}{3}$

Option 3: $\frac{1}{2}$

Option 4: $\frac{1}{3}$