A river does 6500 J of work on a water wheel every second. The wheels efficiency is 12%

A. How much worked in joules can the axle of the wheel do?

B. What is the power output of the wheel in 1s?

An example of an anaerobic exercise Question 10 options: a) sprinting b) marathon running c) walking d) long distance swimming

Which statement correctly describes variable stars? A) Variable stars with shorter periods have lower luminosities, so they can be observed when they are farther away.

A 75-n sack is dragged along the floor with a horizontal force of 100 n. the frictional force acting on the sack is 30 n. what is the value of the fg?

A student claims that water's polarity is the reason it has a high specific heat. What method could the student use to test his claim? Perform research to see if other polar molecules have high specific heat.

The electrical resistance of dry skin is 100 kΩ, but can be lowered to 20 Ω if electrode contact area is large and conducting gel is used on the skin. If Vmax of the defibrillatror 500 V and lasts 0.

What must be your car's average speed in order to travel 235km in 3.25 hours?

At a certain location, the horizontal component of the earth's magnetic field is 2.5 * 10-5 T, due north. A proton moves eastward with just the right speed for the magnetic force on it to balance its weight. Find the speed of the proton.

An acrobatic airplane performs a loop at an airshow. The centripetal acceleration the plane experiences is 14.7 m/s2. If it takes the pilot 45.

Which of the following was NOT an outcome of Bacon's rebellion? A. A more direct focus on the "Indian Problem" B. A more focused plain to isolate black slaves from white servants C.

A science class did an investigation to see how many breaths it took for each student to blow up a balloon. Jason blew up his balloon with the fewest breaths. Which of these might explain why Jason took fewer breaths to blow up his balloon? A.