What does the index of refraction directly measure?

A heat engine operates at 30% of its maximum possible efficiency and needs to do 995 J of work. Its cold reservoir is at 22 ºC and its hot reservoir is at 610 ºC.

What happens to the orbit of earth when its velocity is halved

12. A space walker conducts a sound experiment on a space walk by striking a tuning fork with a mallet. Instrumentation is used to detect sound waves. Which explains the results of this experiment? A.

When a chemical change happens we sometimes see a colour change. What other observations tell you that a chemical change is happening?

A heart defibrillator is used to enable the heart to start beating if it has stopped. This is done by passing a large current of 12.0 A through the body at 25.0 V for a very short time, usually about 3.00 ms.

When unequal resistors are connected in parallel in a circuit,?

A piano tuner hears three beats per second when a tuning fork and a note are sounded together and six beats per second after the string is tightened. What should the tuner do next, tighten or loosen the string? Explain.

How much work is done? A Net Force of 9.0 N acts through a distance of 3.0 m in a time of 3.0 s. The answers are 3.0 J, 9.0 J, 27 J, 81 J.

Two capacitors are identical except that they have different insulators in the gap between the conductors. Capacitor A has an air filled gap while capacitor B uses a material with dielectric constant 3 to keep the conductors apart.

The intensity of the sun's radiation incident upon the earth is about i=1.4kw/m2. suppose this is the value for the intensity of sunlight incident upon the satellite's solar panels. what is the total solar power p absorbed by the panels?