When astronomer vera rubin began to measure the rotation curves of spiral galaxies in the 1960s, she found?

Why aren't renewable resources used for everything that we use energy for?

What types of friction occur when you ride a bike through a puddle

Which of the following is a consequence of abuse only? Dangerous and can have many serious consequences. Develops into a physical and/or psychological need for a substance. Inappropriate use of drugs due to ignorance.

Batteries can supply a steady flow of electrons. True False

Define the following terms: Internal energy Specific heat Entropy Temperature

Your car travels 600 miles in 6 hours. You stop the car for lunch for 1 hour and then you continue on your trip for another 14 miles and finish the entire trip in 8 hours. What was your car's average speed while you were driving?

Speed is a vector quantity

The observation location A is located at m. The conventional current running through the wire is 7.5 amperes. In this exercise you will calculate the magnetic field at the observation location due only to segment 4 of the wire.

The wavelength of a light wave can be used to measure which of the following? A. The direction the wave is traveling B. How many photons the wave contains C. How much energy the wave has D. How high the top of the wave is

Sound 1 has an intensity of 38 W/m2. Sound 2 has an intensity level that is 2.5 dB greater than the intensity level of sound 1. What is the intensity of sound 2?