A child pulls a sled up a snow covered hill. The child does 405 J of work on the sled. If the child walks 15m up the hill, how large of a force must the child exert?

If the Earth were somehow moved twice as far from the Sun, what would happen to the time it would take to complete an orbit? A) Nothing would happen. B) It would be doubled. C) It would be nearly tripled. D) No answer text provided.

What form of energy is changed to sound energy when uou use a cd player?

In some plants, the pistils don't Form until a few days after the stamens do. How might this keep a plant from self pollinating

A step-down transformer providing electricity for a residential neighbor-hood has exactly 2680 turns in its primary. when the potential differenceacross the primary is 5850 v, the potential difference at the secondary is120 v.

If a wave travels 16 meters in 2 seconds, what is its wave speed?

Is momentum conserved in the collision?

Which of the following has more inertia: (a) a rubber ball and a stone of the same size? (b) a bicycle and a train? (c) a five-rupees coin and a one-rupee coin?

In a laboratory, you determine that the density of a certain solid is 5.23*10-6kg/mm3. Convert this density into kilograms per cubic meters.

List the solar objects in correct order from the Sun. Venus Earth Mercury Saturn Neptune Mars Jupiter Asteroid Belt The Sun Uranus

The power exerted by a muscle is the product of the force exerted and the velocity of contraction. The area of which of these shaded regions represents the power exerted while a weight is lifted at maximum speed?