If the distance between earth and the sun were half of its present value then what would have the change been in the number of days in a year?

If the distance between the sun and the earth were half the present value, the span of a year would be of ……..days. [Fill in the blanks]

If the distance of the earth from the sun suddenly decreases to half its present value, then how many days will make a year ?

If the average distance between the sun and the earth decreases for some reason , then state whether the length of a year will increase or decrease. Give the reason for your answer .

A parallel plate 300 mu F capacitor is charged to 200 V, and is then disconnected from the source. If the distance between its plates is halved, what will be the potential difference between the plates and the change in energy stored in it?

A wheel with 8 metallic spokes each 50 cm long is rotated with a speed of 120 rev. "min"^(-1) in a plane normal to the horizontal component of the Earth's magnetic field. The Earth's magnetic field at the place in 0.4 G and the angle of dip is 60^(@) . Calculate the emf induced between the axle and the rim of the wheel. How will the value of emf be affected if the number of spokes were increased.

If the mass and the radius of the earth suddenly reduce to half their present values, (i) how many hours will be there in a day?

If the diameter of the earth becomes twice its present value but its mass remains unchanged, then how would be the weight of an object on the surface of the earth affected ?

It is said that elemental composition of living organisms and that of inanimate objects (like earth's crust ) are similar in the sense that all the major elements are present in both. Then what would be the difference between these two groups ? Choose a correct answer from the following.