MHT CET 2023 14th May Evening Shift | MHT CET Year Wise Previous Years Questions

A body (mass $$\mathrm{m}$$ ) starts its motion from rest from a point distant $$R_0\left(R_0>R\right)$$ from the centre of the earth. The velocity acquired by the body when it reaches the surface of earth will be ( $$\mathrm{G}=$$ universal constant of gravitation, $$\mathrm{M}=$$ mass of earth, $$\mathrm{R}$$ = radius of earth)

$$2 \mathrm{GM}\left(\frac{1}{\mathrm{R}}-\frac{1}{\mathrm{R}_0}\right)$$

$$\left[2 \mathrm{GM}\left(\frac{1}{\mathrm{R}}-\frac{1}{\mathrm{R}_0}\right)\right]^{\frac{1}{2}}$$

$$\mathrm{GM}\left(\frac{1}{\mathrm{R}}-\frac{1}{\mathrm{R}_0}\right)$$

$$2 \mathrm{GM}\left[\left(\frac{1}{\mathrm{R}}-\frac{1}{\mathrm{R}_0}\right)\right]^{\frac{1}{2}}$$

MHT CET 2023 14th May Evening Shift

MCQ (Single Correct Answer)

-0

An ideal refrigerator has freezer at a temperature of $$-13^{\circ} \mathrm{C}$$. The coefficient of performance of the engine is 5. The temperature of the air (to which heat is rejected) is

$$320^{\circ} \mathrm{C}$$

$$39^{\circ} \mathrm{C}$$

$$325 \mathrm{~K}$$

$$325^{\circ} \mathrm{C}$$

MHT CET 2023 14th May Evening Shift

MCQ (Single Correct Answer)

-0

1000 small water drops of equal size combine to form a big drop. The ratio of final surface energy to the total initial surface energy is

$$10: 1$$

$$1: 10$$

$$1000: 1$$

$$1: 1000$$