Question

1) According to Einstein's theory of general Relativity, The Earth orbits around the sun because

A) The gravitational force emanating from the Sun causes the Earth to accelerate away from a straight line path and curve towards the Sun
b) The structure of space-time in the region of the Earth has been altered by the presence of the Sun in such a way that its orbit, although curved, is the shortest path in space-time.
c) The particles having mass in the Sun give off gravitons which interact with the particles having mass in the Earth causing changes in the motion of the Earth which cause it to follow its elliptical orbit

Question 2

In Newton's theory of Gravitation, gravity manifests itself as

Question 2 options:

	Small particles called gravitons being transmitted between massive objects
	An attractive force that acts at a distance
	The curvature of space-time in the neighborhood of massive objects.
	None of the above

Question 7 (1 point)

The predominant mode of heat transfer than carries heat away from a tongue which is in contact with cold metal is

Question 7 options:

	Radiation
	Conduction
	Convection
	No heat would be transferred in the situation described

Question 8 (1 point)

Which mode of heat transfer is constantly being experienced by every object in the universe ?

Question 8 options:

	Conduction
	Convection
	Radiation

Question 9 (1 point)

An atom of a given element can change to an atom of a different type of element ( alchemy! ) if and only if...

Question 9 options:

	The number of neutrons in the nucleus has changed
	The number of nucleons in the nucleus has changed
	The number of electrons orbiting the nucleus has changed
	The number of protons in the nucleus has changed

Answer 1

1. Correct option B. Because the bend in space time curvature allows Sun to revile around it.

2. Correct option B. It acts as an attractive force which is inversely proportional to the distance.

3.Correct option B. Because conduction takes place only in the solid objects.

4.Correct option C. In the universe maximum mode of heat transfer is radiation

5 Correct option D. When proton number changed the element is also get changed