The part of the atom that accounts for electricity is the
1 answer:
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<u>Answer:</u>
In an <u>inelastic collision</u> the kinetic energy is not conserved, but <u>the total momentum of the system is conserved</u>.
In other words; the Initial momentum is equal to the Final Momentum
:
Then:
<h2>
This means that after the collision the kinetic energy is transformed (dissipated) into another type of energy (caloric energy, for example); and there may be deformation in the blocks.
Therefore, the sentence that best describes this situation is:
<h2>The total momentum is zero. </h2>
Answer:
20 N
Explanation:
There are two forces acting on the box:
- The force of push, F, forward, of magnitude F = 20 N
- The force of friction, , backward
So, the equation of motion for the box is
where
m = 5.0 kg is the mass of the box
a is its acceleration
The box is sliding at constant velocity: this means that its acceleration is zero
a = 0
So, the equation becomes
Therefore, we can find the magnitude of the force of friction:
The fundamental frequency of vibration of a string is given by
where
L is the length of the string
T is the tension
is the linear mass density, where m is the mass of the string
Let's start by calculating the mass density of the piano wire in the problem. Its mass is
and its length is L=0.600 m, so its mass density is
Therefore now we have everything to calculate the fundamental frequency of the piano wire. Using T=440 N and the first equation, we find:
where
L is the length of the string
T is the tension
Let's start by calculating the mass density of the piano wire in the problem. Its mass is
and its length is L=0.600 m, so its mass density is
Therefore now we have everything to calculate the fundamental frequency of the piano wire. Using T=440 N and the first equation, we find: