An old man cannot see the object nearer than 150 cm if he wishes to see objects up to50 CM he should put answer me...please​

What is the order of the moon, earth, and sun in a lunar eclipse and a solar eclipse?

An automobile steering wheel is shown. what is the ideal mechanical advantage? if the ama is 8, what is the efficiency of the steering wheel?

In a system with only a single force acting upon a body, what is the relationship between the change in kinetic energy and the work done by the force? answers: work is equal to the change in kinetic energy.work depends on the square of the change in potential energy.work is equal to the negative of the change in kinetic energy.work is equal to the square of the change in kinetic energy