Answer:
25.95 m
Explanation:
m = mass of the bungee jumper = 50 kg
k = spring constant of the cord = 100 N/m
x = stretch of the cord
L = length of the cord = 10 m
h = height dropped by the bungee jumper = L + x = 10 + x
Using conservation of energy
Spring potential energy = gravitational potential energy
(0.5) k x² = mg h
(0.5) (100) x² = (50) (9.8) (10 + x)
x = 15.95 m
d = distance traveled below the bridge
d = L + x
d = 10 + 15.95
d = 25.95 m
Answer:
The age of the universe would be 9.9 billion years
Explanation:
We can calculate an estimate for the age of the Universe from Hubble's Law. Let's suppose the distance between two galaxies is D and the apparent velocity with which they are separating from each other is v. At some point, the galaxies were touching, and we can consider that time the moment of the Big Bang.
Thus, the time it has taken for the galaxies to reach their current separations is:
and from Hubble's Law:
Therefore:
With the given value for the Hubble's constant we have:
and thus,
Answer:
Electrons are negatively charged, and so are attracted to the positive end of a battery and repelled by the negative end. So when the battery is hooked up to something that lets the electrons flow through it, they flow from negative to positive.
Explanation:
The initial velocity of the stone is 0 ft/s. Given the initial velocity (Vi), final velocity (Vf), and acceleration due to gravity (g), the distance may be calculated through the equation,
d = ((Vf)² - (Vi)²) / 2g
Substituting the known values,
d = ((96 ft/s)² - 0))/ (2x32.2)
The value of d is 143.10 ft.
Answer:
earth's shadow covering the moon,thats lunar eclipse
