Answer:
-26 m/s (backward)
Explanation:
We can solve this problem by using the law of conservation of momentum.
In fact, the total momentum momentum of the cannon + ball system must be conserved before and after the explosion.
Before the explosion, they are both at rest, so the total momentum is zero:
p = 0
After the explosion, the total momentum is:
where
M = 1.5 kg is the mass of the cannon
m = 0.52 kg is the mass of the ball
v = +75 m/s is the velocity of the ball
V is the velocity of the cannon
Since the momentum is conserved, we can equate the two expressions:
And solving, we find V:
where the negative sign means the direction is opposite to that of the ball.
An object has identity(each object is a distinct individual). An object has state(it has various properties, which might change). An object has behavior(it can do things and can have things done to it). This is a somewhat ordinary description of what an object is like.
Answer:
The electrons in an atom can only occupy certain allowed energy levels. ... Only certain energy levels are allowed, so only certain transitions are possible and hence specific wavelengths are emitted when an electron drops to a lower energy level.
Answer:
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In order to make any conclusive diagnosis, I would need to bring Jillian
into my office, and conduct a long, slow, complete, private examination.
Where was I ?
Oh, yes.
As I started to say: Your description of Jillian's behavior is consistent
with a diagnosis of OCD.
