1) <span> What is heat? the answer is B because heat is a form of energy</span>
Answer:
The magnitude is 
The direction is the positive x axis
Explanation:
From the question we are told that
The electric field is E = 450 V/m in the negative y ‑direction
The speed of the proton is
in the positive z direction
Generally the overall force acting on the proton is mathematical represented as

Now for the beam of protons to continue un-deflected along its straight-line trajectory then 
So

=> 
Generally from unit vector cross product vector multiplication

So the direction of B (magnetic field must be in the positive x -axis )
So

=> 
=>
=>
=> 
=>
Answer:
the process of finding the age of fossils is called carbon dating because they use samples of carbon and compare it's characteristics to the samples of carbon from each set time
Answer:
B. The elasticity of demand is -0.126
Explanation:
% Change in Quality demand = -2.65% (negative because of drop)
% Change in price = 21%
Elasticity of demand is given by

The Elasticity of demand is -0.12619
Answer:
k=694.44
Explanation:
PE=1/2kx^2
5=1/2k*.12^2
5=1/2k(.0144)
divide both sides by .0144