What are two ways you could alter the design of a baseball to make it travel faster from the pitcher's mound to home plate? Explain why.

What will be the amount of heat required to raise the temperature of 3 kg of paraffin by 10 degree C if 44000joules of heat energy is required to raise the temperature of 1 kg of paraffin by 20 degree C

Why does a wet towel spread out and hung outside on a windless day dry faster than a wet towel left rolled up in a plastic bag?

A force F = 94.9 N acts at an angle α = 35◦ with respect to the horizontal on a block of mass m = 29.3 kg, which is at rest on a horizontal plane. The acceleration of gravity is 9.81 m/s 2. If the static frictional coefficient is µs = 0.

How much force is needed to stop a 90-kg soccer player if he decelerates at 15 m/s²? A. 6 N B. 15 N C. 135 N D. 1350 N

A solution has a ph level of 8. Which best describes the solution? A strong acid A strong base A weak acid A weak base

An automobile steering wheel is shown. The ideal mechanical advantage of this wheel and axle is. If a driver must exert a force of 2 N to overcome an axle resistance of 16 N, the AMA of the steering wheel is and its efficiency is__ %.?

How does the law of conservation of energy apply to machines? -Machines create energy from scratch. -Machines consume energy until no energy remains. -Energy transferred to a machine equals energy transferred from it.

As you turn up the volume on your mp3 player you are increasing

Which event would lead to an overpopulation of a species within a food web A. The grass was eaten by the rabbits stopped growing B. The population of wolves who ate the rabbits decreased C. The grasshopper were affected by the diseased grass D.

Which of the following is true A) land heats less rapidly than water B) land heats more rapidly than water C) land reaches higher temperatures than water D) both b and c