Which excited electron has the lowest energy?

The moon sun is directly overhead at the equator during (a solstice or an equinox) ?.

Calculate the centripetal force on the end of a 100 m wind turbine blade that is rotating once every 7 seconds. assume the mass is 4 kg.

It is desired that 7.7 mc of charge be stored on each plate of a 5.3 mf capacitor. what potential difference is required between the plates?

A tank having a volume of 0.85 m 3 initially contains water as a two-phase liquid-vapor mixture at 260 o C and a quality of 0.7.

To survive, humans need resources found on the Earth. Why is this true? A. Humans could not eat, drink, and breathe without the resources of plants, water, and air. B. Humans could not have cars without the resources of fuels and metals. C.

According to the concept of length contraction, what happens to the length of an object as it approaches the speed of light and then slows down, eventually coming to a stop? It is always observed as contracting.

If you could chooses between to nearly identical products the one that is free and the other you have to pay for which would you choose why

A bicyclist bikes the 56 mi to a city averaging a certain speed. The return trip is made at a speed that is 6 mph slower. Total time for the round trip is 11 hr. Find the bicyclist's average speed on each part of the trip.

You have two pendulums with cords that are exactly the same length. one is on earth (with an acceleration due to gravity of 9.81 meters/second2) and the other one is on the moon (with an acceleration due to gravity of 1.63 meters/second2).

A light-rail train going from one station to the next on a straight section of track accelerates from rest at 1.1 m/s2 for 20 s. It then proceeds at constant speed for 1100 m before slowing down at 2.2 m/s2 until it stops at the station.