Answer:
a. 0.98 J
b. -0.98 J
c. 306.25 J/m²
Explanation:
(a)
(b)
The increase in gravitational potential energy = decrease in elastic potential energy
Elastic potential energy = -0.980 J
(c) The spring constant can be calculated as follows:
Answer:
The answer to your question is 5.5 x 10¹² kg/km³
Explanation:
Data
density = rho = X
mass = 5.94 x 10²⁴ kg
volume = 1.08 x 10¹² km³
Process
To solve this problem use the density formula and simplify it to find the result.
Formula
density =
Substitution
density =
Simplification and result
density = 5.5 x 10¹² kg/km³
Answer:
B. Law of Conservation of Mass
Explanation:
In other words, the mass of any one element at the beginning of a reaction will equal the mass of that element at the end of the reaction. If we account for all reactants and products in a chemical reaction, the total mass will be the same at any point in time in any closed system.
The answer is true my dude
The new rotational speed of the combined system is 32 rad/s
<u>Explanation:</u>
Given-
Moment of Inertia, I = 8 kg m²
speed of rotation, ω = 4 rad/s
Mass of the lump = 1 kg
distance = 1 m
New rotational speed = ?
We know,
When the lump is dropped on the rotating disc then the angular momentum remains conserved.
Angular Momentum of the disc, Lₐ = Iω
Angular momentum of the lump, L ₓ = mvR
Since the angular momentum remains conserved,
Lₐ = Lₓ
8 X 4 = 1 X v X 1
New rotational speed, v = 32 rad/s
Therefore, the new rotational speed of the combined system is 32 rad/s.