1. In a typical station, amid a series of energy transfers and conversions, about $70 \%$ of the energy input gets wasted in the form of thermal energy. The efficiency of such a power station is about

2. An object is lifted 5 m above the leveled ground, the mass of the object is 20 kg, and the gravitational pull is 10 $Nkg^{-2}$, the gravitational potential energy ($E_{p}$) of the object is

3. A pendulum bob of mass 0.5 kg moves at a speed of 2 $ms^{-1}$. Its gravitational kinetic energy $(E_{k})$ would be

4. The SI unit of force is

5. A state of equilibrium is when

6. The addition of two or more vectors to get a single vector is termed as

7. Volume is a

8. Electromagnetic waves that include light belong to

9. The electromagnetic wave with the lowest frequency is

10. Among the four, the highest wavelength is of