a passenger on cruise between San Juan, Puerto Rico and Miami, Florida accidentally drops a souvenir metal cube over the side of
1 answer:
Answer:
P = 84.1 MPa
Explanation:
- The pressure at the bottom of column of of salt water of height h, is given by the following expression:
where ρ = density of salt water (in Kg/m³),
g = acceleration due to gravity (in m/s²)
h = height of the column of water.
- Replacing by their values in (1):
- Neglecting the atmospheric pressure, the pressure on the cube at the bottom of Puerto Rico Trench is given by (2):
- P = 84.1 MPa.
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Answer:Changing Length
Explanation:
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Answer:
Cannonball b spends more time in the air than cannonball a.
Explanation:
Starting with the definition of acceleration, we have that:
Since both cannonballs will stop in their maximum height, their final velocity is zero. And since the acceleration in the y-axis is g, we have:
Now, this time interval is from the moment the cannonballs are launched to the moment of their maximum height, exactly the half of their time in the air. So their flying time t_f is (the minus sign is ignored since we are interested in the magnitudes only):
Then, we can see that the time the cannonballs spend in the air is proportional to the vertical component of the initial velocity. And we know that:
Finally, since and
, we can conclude that:
In words, the cannonball b spends more time in the air than cannonball a.