Questions

Any object rolls when there is no friction. So, Sliding to Rolling is correct.

Prime Minister Narendra Modi has launched a survey on the NaMo App, asking people to rate the performance of the government at the Centre and MPs and MLAs in their constituencies. He launched the initiative, to mark the completion of four years of the NDA government, which came to power at the Centre in 2014.

Adding the corresponding numbers in first and last figures gives the corresponding number in the middle figure.

i.e, 4 + 3 = 7

13 + 2 = 15

2 + 4 = 6

9 + 1 = 10

Japan's - Japan Aerospace Exploration Agency (JAXA) has successfully launched the world's smallest rocket with the ability to put a tiny satellite into orbit. Rocket -  SS-520 which was pnce failed in 2017 lifted off from the Space Center carrying a microsatellite TRICOM-1R, a three-unit CubeSat weighing about 3 kilograms. The CubeSat will now be used to collect images of the Earth's surface via multiple cameras.

Vitamins are essential nutrients found in foods. They perform specific and vital functions in a variety of body systems, and are crucial for maintaining optimal health.

The two different types of vitamins are fat-soluble vitamins and water-soluble vitamins.

Fat-soluble vitamins :

 Vitamins A, D, E and K — dissolve in fat before they are absorbed in the bloodstream to carry out their functions. Excesses of these vitamins are stored in the liver, and are not needed every day in the diet.

Water-soluble vitamins :

Vitamins dissolve in water and are not stored by the body. Since they are eliminated in urine, we require a continuous daily supply in our diet. The water-soluble vitamins include the vitamin B-complex group and vitamin C.

Water-soluble vitamins are easily destroyed or washed out during food storage or preparation.