If an object is traveling at the same constant speed AND
IN A STRAIGHT LINE, then it's demonstrating Newton's
1st and 2nd laws of motion.
If its speed or direction is changing, then it's demonstrating
Newton's 2nd law of motion.
This is a momentum problem, so let's find the velocity of the ball initially. It can be given by:
Let's plug in values and solve for a:
Now, we can multiply by time to get velocity:
We have all the information we need, so let's set up an equation to solve for the velocity of the wall after the collision:
Solve for velocity of wall finally:
Plug in all values:
So, the final velocity of the wall will be
10.98 m/s.
The KE in this problem initially was 110889 J (1/2mv^2). After the collision it was 52640.1 so, the
KE decreased.
Since there was no mashing of objects together, this was an
elastic collision.
Answer:
The amount of heat transfer is 21,000J .
Explanation:
The equation form of thermodynamics is,
ΔQ=ΔU+W
Here, ΔQ is the heat transferred, ΔU is the change in internal energy, and W is the work done.
Substitute 0 J for W and 0 J for ΔU
ΔQ = 0J+0J
ΔQ = 0J
The change in internal energy is equal to zero because the temperature changes of the house didn’t change. The work done is zero because the volume did not change
The heat transfer is,
ΔQ=Q (in
) −Q (out
)
Substitute 19000 J + 2000 J for Q(in) and 0 J for Q(out)
ΔQ=(19000J+2000J)−(0J)
=21,000J
Thus, the amount of heat transfer is 21,000J .
Answer:
Explanation:
Average speed is total distance traveled over the time needed to do so.
d = vt
v = (1.0(3.0) + 1.6(5.0) + 1.4(4.0) / (3.0 + 5.0 + 4.0)
v = 16.6 / 12
v = 1.383333333...
v = 1.4 m/s
The answer is Magnesium and Calcium. The components progress toward becoming cations with positive oxidation states is Calcium and Magnesium. Cation is a decidedly charged particle, i.e., one that would be pulled in to the cathode in electrolysis.