Based on the wall of conservation of energy how can we reasonably improve a machines ability to do work?

After the ball reaches the top and begins its return back down, by how much does it speed increase each second?

A light aircraft travels 2 miles per hour less than twice the speed of a van. If the van can travel 171 miles in the same time it takes the aircraft to travel 336 miles, then what is the average speed of each?

How ocean currents effect temperature and the amount of moisture of the air mass above coastlines

A 120 volt refrigerator uses 650 watts. Calculate how much work is done by the refrigerator in one hour. A) 9.7 J B) 39,000 J C) 2,300,000 J D) 4,100,000 J

How can you separate a mixture containing a solid and a liquid? Adding another liquid to the mixture By condensing the liquid Adding more solid to the mixture By evaporating the liquid

The metric unit of force is the Newton (N), which is kg∙m/s^2. Convert 10 mg∙cm/s^2 to Newtons. Be careful when working with units. A. 1 x 10^-2 N B. 1 x 10^-5 N C. 1 x 10^-6 N D. 1 x 10^-7 N

Which of the following aspects of the environmental movement addresses the public's right to intervene in environmentally damaging activities on private land?

A mine elevator is supported by a single steel cable 0.0125 m in diameter. The total mass of the elevator cage and occupants is 6450 kg. By how much does the cable stretch when the elevator hangs by 362 m of cable? (Neglect the mass of the cable.

What scientific practice is this? 1) collecting data 2) asking a question 3) providing explanations 4) communicating results

The kinetic energy of an object depends on both the objects mass and velocity. a. True b. False