A new unit of length is chosen such that the speed of light in vacuum is unity. What is the distance between the Sun and the Earth in terms of the new unit if light takes 8 min and 20 s to cover this distance ?

An element 'X' has bcc lattice as shown below: The unit cell length a is 306pm What is the distance between nearest neighbours?

If earth revolvesround the sun in one year. If the distance between them become double, the new period of revolution will be

Why is the distance between stars expressed in light years ? What do you understand by the statement that a star is eight light years away from the Earth ?

An athlete completes one round of a circular track of diameter 200m in 40s. What will be the distance covered and the displacement at the end of 2 min 20s?

Why is the distance between stars expressed in light years? What do you understand by the statement that a star is eight light years away from the earth?

Following is the con - version graph between kilometer and miles .The scale on x - axis represents unit length is equal to 2 miles and scale on y - axis represent 1 unit length is equal to 1.6 kilometers .Read the graph and answer the question . An athlete runs 6 miles . What is the distance in km .

The size of the image of an object,which is at infinity, as formed by a convex lens of focal length 30 cm is 2 cm. If a concave lens of focal length 20 cm is placed between the convex lens and the image at a distance of 26 cm from the convex lens, calculate the new size of the image