Answer:
470.4N
Explanation:
Given parameters:
Mass of the skydiver = 48kg
Unknown:
Force she exerts as she is falling to the ground = ?
Solution:
The force she exerts while falling to the ground is her weight;
Weight = mass x acceleration due to gravity
Acceleration due to gravity = 9.8m/s²
Weight = 48 x 9.8 = 470.4N
Example problem circuit with a pair of parallel resitiors in series with another resistors. Figure 2 solution. We start by simplifying the parallel l...
Answer:
These are all the forces acting on the ball: friction, gravity, and a normal force.
Explanation:
If a star’s light is shifted to the red part of the light spectrum, that means
that the light waves we see when we look at that star are longer than
they SHOULD be ... longer than they were when they left the star.
Note:
The wavelengths are NOT "getting longer" while we sit there and look
at them. That doesn't happen. They ARE longer than they should be.
Right now, the only way we KNOW OF that can increase the wavelength
of light is if the source of the light is moving AWAY from us, and so we
mark that star down in our notebook, and next to it we write "This star is
moving away from us.". This is kind of what choice-C is trying to say.
The thing about this whole story that should blow our minds is this:
-- We observe a star or a galaxy.
-- The light we observe has wavelengths longer than they should be.
-- We say that the star or galaxy is moving away from us.
Now, my question to you is:
HOW do we know what the wavelengths SHOULD be ? ?
We only know what we see. How do we know what the
wavelength was when the light left the star or galaxy ?
Main sequence stars fuse hydrogen atoms to form helium atoms in their cores. About 90 percent of the stars in the universe, including the sun, are main sequence stars. These stars can range from about a tenth of the mass of the sun to up to 200 times as massive. Stars start their lives as clouds of dust and gas.