Why is the spectrum of a star called an absorption spectrum?

How can potential energy be related to kinetic energy?

Which of the following is a complex machine? 1) piano 2) bottle opener 3) shoehorn 4) doorknob

What is the kinetic energy of a 74.0 kg skydiver falling at a terminal velocity of 52.0m/s?

an electrical iron box having power 400w is operated in 10hours. what will be the energy consumed by the device in commercial unit?

You are holding one end of an elastic cord that is fastened to a wall 3.0 m away. You begin shaking the end of the cord at 3.5 Hz, creating a continuous sinusoidal wave of wavelength 1.0 m.

If the Coast Guard warns of a giant wave of water approaching the shore as a result of a major earthquake, they are warning of a. an aftershock. b. liquefaction. c. a tsunami. d. landslides.

What is the total number of atoms in the following formula? CaBr2 4 3 2 1

Object A with a mass of 500 kilograms hits stationary object B with a mass of 920 kilograms. If the collision is elastic, what happens after the collision? A) Both object A and object B move forward but with different velocities.

A young man walks daily through a gridded city section to visit his girlfriend, who lives m blocks East and nblocks North of where the young man resides.

Aliens from planet Moby have three alleles for skin color: R (red) W (white) and B (Blue). If all of these alleles are codominant and aliens on planet moby can only inherit two alleles for a gene, what are the six possible genotypes for skin color