If earth be at half of its present distance from the sun, how many days will there be in a year?

If the radius of earth becomes half of it's present radius how many times decrease in a day.

When the earth shrinks to half of its radius, without reducing its mass, what change will be there in the duration of a day?

If the radius of a circle is doubled,by how many times will its area be increased?.

A planet's year is 11 times the earth's year. Calculate the distance of this planet from the sun if the distance of the earth is 1.50xx10^8 km from the sun.

If the earth suddenly contracts to one third of its present radius, how much would the day be shortened ?

A sum is taken for one year at 16% p.a. if interest is compounded after every three months, how many times interest will be charged in one year.

Find the equation to the locus of a point whose distance from the X-axis is double its distance from the Y-axis.

In a Young's double slit experiment, the distance between slit is halfed and distance of screen is made three times. How will the frige width change?

Calculate the half-life of a first order reaction from their rate constants given below: 4 years^-1