1. Among the four, the highest wavelength is of

2. The electromagnetic wave with the lowest frequency is

3. Potential energy and kinetic energy are types of

4. The mass of a car is 500 kg and it is lifted up by a crane to a height of 200 m. Given that gravity is 10 $Nkg^{-1}$, the gravitational kinetic energy $(E_{k})$ of the car is

5. The formula for the gravitational potential energy is

6. The SI unit for work done is

7. 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

8. A car uses a total energy of 2500 J and the output is 750 J. The efficiency of the car is

9. If there is an object of 50 grams and another object of 150 grams. The total mass would be

10. The SI unit of force is