Daily NEET MCQ- May 13, 2022 - NEET MCQ

According to Kepler’s law of orbit, every planet revolves around the sun in an elliptical orbit and the sun is at one of the foci.

According to Kepler’s law of area, a line segment joining a planet and the Sun sweeps out equal areas during equal intervals of time.
If it takes 36 hours to sweep an area of 1 million square km, it would take (36 + 36) hours to sweep an area of (1 + 1) million square km.
Therefore, the answer is 72 hours.

By observing the motion of Mars in the sky, Kepler inferred that the planets have elliptical orbits around the sun. Kepler discovered that a simple ellipse would clearly define the orbit of Mars and eliminate many complexities. It would also eliminate the need for epicycles.

Henry Cavendish used lead spheres in his experiment because lead was easily available at the time. Iron was also abundantly available. However, Henry Cavendish chose lead because it is denser than iron and the mass of lead is about 44% higher than that of iron for the same size of the sphere – this would lead to a larger gravitational force which is easier to measure.

Thermal power plants produce fly ash. Fly ash contains particles of silica, alumina, and oxides of iron, calcium, and magnesium, and toxic heavy metals like lead, cobalt, arsenic, and copper. The thermal power plants in India use bituminous coal and produce large quantities of ash.

Fuel obtained from plastic waste has high octane rating. It contains no lead and, therefore, is known as green fuel. Due to recent developments made in chemical and textile industries, clothes will be made from recycled plastic waste. These will be available soon in the global textile market.

Disposing of waste has huge environmental impacts as a certain type of wastecan be hazardous and can contaminate the environment if not handled properly. Some waste generates methane gas, which contributes to the greenhouse effect.

Aldosterone is the main mineralocorticoid in our body. It is mainly responsible for fluid regulation in the body and hence propagates reabsorption of sodium ions and excretion of phosphate ions.

The adrenal cortex mainly secretes hormones commonly known as corticoids. Aldosterone is the main mineralocorticoid in the body responsible for regulating osmotic pressure and body fluid levels.

• Islet of Langerhans consists of two major types of cells, namely, α-cells and β-cells.
• β-cells are responsible for the secretion of insulin, which is responsible for hyperglycaemia or high blood sugar.