1.) Law of Induction.
2.) Increase Winding Count
Answer:
548800J
Explanation:
Given parameters:
Mass of roller coaster = 800kg
Height of hill = 70m
Unknown:
Change in potential energy = ?
Solution:
The change in potential energy is the difference between the potential energy at the bottom and at the top.
Potential energy at the bottom is 0J
So;
Change in potential energy = mgh - 0
m is the mass, g is the acceleration, h is the height
Change in potential energy = 800 x 9.8 x 70 = 548800J
Answer: Wrestler C.
Explanation: Wrestler C has a mass of 77.6 kg. So it is the one who is highly affected by gravity.
W= mg
= 77.6 kg x 9.8 m/s²
= 760.48 N
Answer:
Gravity holds stars together and keeps us on the ground. The electromagnetic force ensures the stability of atoms and makes chemistry happen. The strong nuclear force holds the kernels of matter, atomic nuclei, together, and powers the burning of stars.
Explanation:
Answer:
(1/2)*n = .05 by the definition of half-life where n is the number of half-lives
n ln .5 = ln .05
n = ln .05 / ln .5 = 4.32 number of half-lives
So 4.32 * 20 = 86.4 years has passed
Actually, they only want the mass left. However, all that has changed is that
95% of the original radioactive atoms have changed to a different form of about the same amount of mass. The amount of mass remaining would be about the same. Also, one doesn't know the percentage of radioactive atoms
that formed the original mass.
