Answer:
A, and D are the answers
Explanation:
The pulley. It is located where the bicycle chain and gears are. The chain is wrapped around the pulley which turns and causes the wheel to turn on its axle.
Answer:
the maximum height of Joe's ball will be 4 times Bill's ball.
Explanation:
let bill's velocity be v then Joe's velocity is 2v.
and initial velocities of both bill and Joe are 0
for Bill
for Joe
thus we can write that
h'=4h
the maximum height of Joe's ball will be 4 times Bill's ball.
Answer:
After 5 half life the amount remains as 3.125 g
Explanation:
After each half life the quantity becomes half
so we know that initial amount is 100 g
so after 1st half life amount is half so it left as
m = 50 g
now after 2nd half life amount again becomes half
m = 25 g
after 3rd half life it is again half so remaining amount is
m = 12.5 g
after 4th half life the amount becomes half again
m = 6.25 g
Now after 5th half life the amount remains as
m = 3.125 g
The gas releases an amount of heat equal to -225 J
Explanation:
The change in internal energy of a diatomic gas is given by:
where
n is the number of moles
R is the gas constant
is the change in temperature
For this gas we have:
n = 0.235 mol
So, the change in internal energy of the gas is
Now we can use the 1st law of thermodynamics to find the heat absorbed/released by the gas:
where
Q is the heat absorbed by the gas
W is the work done by the gas
Here we have:
Solving for Q, we find:
Where the negative sign means the heat has been released by the gas.
Learn more about gases:
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