Answer:
B
the earth's mass is more than the moon
the moon's mass is less than the
Explanation:
Using the formula;
2x = vt
x is the distance up from the ocean floor the submarine is
v is the speed of sound in water
t is the time
Given
t = 2.3s
v = 1490m/s
Required
how high (approx) up from the ocean floor is the submarine x
From the formula;
x = vt/2
x = 1490(2.3)/2
x = 745(2.3)
x = 1,713.5m
Hence the submarine is 1713.5m high up from the ocean floor
Dissipated energy is 1200 J
Explanation:
The dissipated energy is the difference between the initial gravitational potential energy (GPE) of the ball at the top of the hill and after the first rebound.
The GPE of an object is the energy possessed by the object due to its position in a gravitational field; it is given by
where
m is the mass of the object
is the acceleration due to gravity
h is the height of the object above the ground
For the ball in this problem,
m = 20 kg
At the top of the hill,
h = 10 m
So initial GPE is
After the first rebound
h = 4 m
So final GPE is
Therefore, dissipated energy is
Learn more about potential energy:
brainly.com/question/1198647
brainly.com/question/10770261
#LearnwithBrainly
Answer:
the first one is energy level
Explanation:
Answer:
carbon, hydrogen, nitrogen and oxygen