Answer:
Explanation:
You don't do the same amount of work. The work formula is F*d = W
W = work
F = force
d = the distance moved.
So you do more work when you move the 10N object because the Force (F) has doubled.
Answer:
Option C
Explanation:
The graph shows endothermic reaction because the reactants are lower in energy and the products are higher is energy. Endothermic reactions absorb energy having products with higher energy.
If you are using PLATO, which I'm sure you are cause I've had the same question, the answer it the following:
Transformers increase and decrease voltage as needed.
<span>0.373 seconds.
First, calculate the initial vertical velocity of the shell.
800sin(30) = 800*0.5 = 400 m/s
Now the formula for the distance traveled is
d = 400 m/s * T + 0.5A T^2
Substituting known values gives.
150 = 400 m/s * T + 0.5*9.80m/s^2 T^2
150 = 400 m/s * T + 4.9 m/s^2 T^2
Arrange as a quadratic formula
0 = 400 m/s * T + 4.9 m/s^2 T^2 - 150
4.9 m/s^2 T^2 + 400 m/s * T - 150 = 0
Now solve for T using the quadratic formula with a=4.9, b=400, and c=-150
The calculated value is 0.373 seconds.
Is this value reasonable? Let's check.
The initial downward velocity is 400 m/s. So 150/400 = 0.375 seconds. Since the actual time will be a bit less due to acceleration by gravity and since the total time is so short, there won't be much acceleration due to gravity, the value of 0.373 is quite reasonable.</span>
