What is one of the most precious natural resources we have is a) crops b) soil c) trees

Explain why the aperture of the spherical mirror should be small compared to the radius of curvature of the mirror.

The table below shows the acceleration of gravity on different bodies in the solar system. on which body would a 10 kg lamp has the most gravitational potential energy when lifted to a height of 2 m? a. earth b. mars c. neptune d. uranus

What is the measurement of how fast an object moves relative to a reference point?