Answer: It’s c
explaining: i guessed
Answer:
<em>The difference in pressure between the external air pressure, and the internal air pressure of the middle ear.</em>
Explanation:
First of all, we should note that pressure decreases with height and increases with depth. The air within the middle ear (between the ear drum and the Eustachian tube) adjusts itself to respond to the atmospheric pressure, or when we yawn. At a high altitude like on the hill, the air pressure in the middle ear, is fairly low (this is to balance the low air pressure at this height). While riding down the hill quickly, there is little time for the air pressure in the ear to readjust itself to the increasing external air pressure, causing the external air to push into the ear drum. Along the way, the air within the middle ear is adjusted by the opening of the Eustachian tube, allowing more air into the space in the middle ear to balance the external air pressure. This readjustment causes the ear to pop.
20 meters per second at 30 seconds.
Multiply 20 meters by the amount of seconds. 20*30 = 600 meters.
It’s mass is 100 kg, because if you divide both numbers, you get 100
Answer:
the magnitudes of the two forces are 45.N and 1.5 N
Explanation:
This in a problem of composition of forces, as the forces are on a single axis, East-West, we can work as a problem of a single dimension, write Newton's second law for each case n
• Two forces to the east
F1 + F2 = m a1
• One force to the east and the other to the west
F1 - F2 = m a2
We see that we have a system of two equations with two unknowns, we proceed to solve it
We add sides equations
F1 + F2 = m a1
F1 - F2 = m a2
2F1 = m (a1 + a2)
F1 = m (a1 + a2) / 2
F1 = 9.31 (0.626 +0.340) / 2
F1 = 4.5 N
We substitute in one of the two equations and find the other force
F1 + F2 = m a1
F2 = m a1 - F1
F2 = 9.31 0.646 - 4.5
F2 = 1.5 N
These are the magnitudes of the two forces 45.N and 1.5 N
