A point object is placed at the centre of curvature of a spherical concave mirror. Which one among the fol- lowing would be the correct location of image formed?

Which one among the following is correct for a person suffering from myopia?

A vehicle starts moving along a straight line path from rest. In first t seconds it moves with an acceleration of 2 m/s² and then in next 10 seconds it moves with an acceleration of 5 m/s². The total distance travelled by the vehicle is 550 m. The value of time t is

A pumpkin weighs 7.5 N. On sub- merging it completely in water, $\frac{3}{4}$L of water gets displaced. The acceleration due to gravity at the place where the pumpkin was weighed is 10 m/s². Which one of the following is the correct value of the density of the pumpkin?