The input work done on a pulley system is 450J. What is the efficiency of the pulley system if the output work is 375J

An object becomes positively charged when it loses electrons loses protons gains electrons gains neutrons It it a

What's the velocity of a bike ride taking 45 mins over a distance of 4km

This is the fundamental force which holds particles together to form protons and neutrons

Q3. A car is initially heading east at 55.0 km h when it turns a corner and heads N 55° Eat 65.0 km h - 1. Determine the change in the velocity of the car during this time.

A car engine burns gas at 495 K, and exhausts to the air at 293 K. If it ran at the highest possible efficiency, how much input heat would it take to do 10,000 J of work? (Unit=J)

Which of the following describes a conductor? A. a rubber shoe sole with electrons stuck to the bottom. B. Electrons moving freely through a copper wire. C. a balloon with a small region of negatively charged electrons. D.

An impala is an African antelope capable of a remarkable vertical leap. In one recorded leap, a 45 kg impala went into a deep crouch, pushed straight up for 0.21 s, and reached a height of 2.5 m above the ground.

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.