What allows objects that do not make their own light able to be seen?

At t=0 a ball, initially at rest, starts to roll down a ramp with constant acceleration. You notice it moves 1 foot between t=0 seconds and t = 1 second. 1) How far does it move between t = 1 second and t = 2 seconds?

The amount of force needed to keep a 0.5 kg football moving at a constant speed of 8 m/s on frictionless ice is

A child carries a 3N book at a constant velocity of 4 meters across a horizontal floor. What is the net work done? a) 0 J b) 7 J c) 10 J d) 12 J

Which of the following causes a current in an electrical circuit? A. resistance B. a current difference C. a voltage difference D. the shape of the electrical circuit

IF p is directly proportional to w does that mean p=kw

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

The difference between two numbers is 15. When twice the smaller number is subtracted from three times the larger number, the difference is 58. What is the larger number?