Answer:
Explanation:
For answer this we will use the law of the conservation of the angular momentum.
so:
where is the moment of inertia of the merry-go-round, is the initial angular velocity of the merry-go-round, is the moment of inertia of the merry-go-round and the child together and is the final angular velocity.
First, we will find the moment of inertia of the merry-go-round using:
I =
I =
I = 359.375 kg*m^2
Where is the mass and R is the radio of the merry-go-round
Second, we will change the initial angular velocity to rad/s as:
W = 0.520*2 rad/s
W = 3.2672 rad/s
Third, we will find the moment of inertia of both after the collision:
Finally we replace all the data:
Solving for :
Answer:
See in explanation
Explanation:
Scientific use: The Einstein's THEORY of relativity states that "Time Is Absolute".
Everyday use: Einstein's LAW of relativity says that time is not the same at all places and events.
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
I believe the right answer choice is letter B
<h2>→0.385 MC.←</h2>
Explanation:
Since 1 molecule of Hydrogen has 2 electrons , then 2 mole hydrogen gas will have 2× 2× 6.023 ×10^23. Therefore, the no. of megacoulomb charge present in 2.0 mol of neutral hydrogen gas is 385,472/10^6
= (answer is on the top)
CARRYINGTOLEARN
:)