for a freely falling object dropped from rest, what is the acceleration at the end of the fifth second of fall?
Which describes the difference between a bowling ball sitting in the rack waiting to be used and the bowling ball knocking pins down?
How long will it take take light moving at 300,000 km/s to reach us from the sun? The sun is 15,000,000 km from earth.
if we increase the distance traveled when doing work , and keep all other factors the same, what will happen?
Explain the advantages and disadvantages of using concentric circles in describing the solar system to an elementary school child.
If a magnet is attracted to a metal object what can you say about the pole of the magnet and the pole of a object ?
The vertical height of an ocean wave from a crest to a trough is 10 meters. What is the amplitude of the ocean wave?
Which of the following most likely has a fixed shape. Helium gas, solid iron, liquid octane, hydrogen plasma
Describe at least two ways that gravitational and strong nuclear forces are alike and two ways that they are different.
Olga is given a pure substance that reflects light. she has a mallet and a heat source. she will know if she has a metal if she?
a projectile is fired straight upward at 100m/s. how fast is it moving at the instant it reaches the top of its trajectory
What is the value of work done on an object when a 70 newton force moves it 9.0 meters in the same direction as the force
two forces A and B act on an object in opposite directions. A is bigger than B. What is the net force acting on an object?
The energy that is released in a chemical reaction is _____________ the energy in the bonds of the reactants.
a man drives Northward at the rate of 80 km/h and then back to his starting point at the rate of 60 km/hr. What is his average velocity?
Explain in detail how photosynthesis follows the law of conservation of mass AND the law of conservation of energy.
