The distance of the nearest star from the Sun is approx 4 × 1016 m. Our galaxy otherwise known as the Road

of Milk has a disk approximately in diameter

1021 m and thickness approximately 1019 m. Find the order of

the size of the number of stars in the Milky Way.

Suppose the distance between Dill and our neighbor

the closest is typical.

When a book falls from a shelf to the ground without anyone pushing on it, no work is done on the book. true or false

Why is a noble gas different from other elements?

Estimate the kinetic energy of the neptune with respect to the sun as the sum of the terms, that due to its daily rotation about its axis, and that due to its yearly revolution about the sun. [assume the neptune is a uniform sphere with mass = 1.0×1026 kg , radius = 2.5×1010 m , rotation period 16.1 h , orbital period 6.01×104 d and is 4.6×109 km from the sun.]