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kirill [66]
3 years ago
15

Facts about Electricity and Magnetism: Stuff Id need to know for an exam

Physics
1 answer:
Georgia [21]3 years ago
4 0
You're in luck !  This is gonna be easy.  Listen to this:

On the exam, they're gonna put questions about all that same stuff
that they talked about IN the class all those times !  The exact same
material.  And if they didn't talk about it in class, then it won't be on
the exam !    How cool is that ? !

All that stuff you copied from the board, all those notes you wrote in
your notebook so you'd remember it, all those handouts they gave out
in class, all that homework you did ... THAT's what they'll put on the exam !

It's gonna be all stuff that you seen and heard and studied before.
No surprises.  It'll be a breeze, and you're totally gonna do fine. 
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the triceps muscle in the back of the upper arm extends the forearm. this muscle in a professional boxer exerts a force of 2.00×
Alexus [3.1K]

Answer: 0.512 kgm²

Explanation:

Given

Force, F = 2*10^3 N

Angular acceleration, α = 121 rad/s²

Lever arm, r(⊥) = 3.1 cm = 3.1*10^-2 m

τ = r(⊥) * F

Also,

τ = Iα

Using the first equation, we have

τ = r(⊥) * F

τ = 0.031 * 2*10^3

τ = 62 Nm

Now we calculate for the inertia using the second equation

τ = Iα, making I subject of formula, we have

I = τ / α, on substituting, we have

I = 62 / 121

I = 0.512 kgm²

Thus, the moment of inertia of the boxers forearm is 0.512 kgm²

5 0
4 years ago
What's the general relationship between mass and gravitational force ?
Hitman42 [59]

Answer:

Gravity is the attraction between two objects that have mass. The amount of gravity is directly proportional to the amount of mass of the objects and inversely proportional to the square of the distance between the objects. Gravity is a force that increases the velocity of falling objects - they accelerate.

Explanation:

3 0
3 years ago
When a sound wave passes from air into water, what properties of the wave will change?
Alja [10]
<span>both the speed of the wave and the wavelength
- The frequency does not change, but the speed does. If that is true, then the wavelength must also change.</span>
3 0
3 years ago
An empty can is floating in a large beaker of water. The volume of water displaced in the beaker is equal to _____.
Mandarinka [93]

The volume of water displaced in the beaker is equal to the volume of the submerged part of the can.

4 0
3 years ago
Compare and contrast the average kinetic energy of 0.5 L of coffee at 34°C,
Len [333]

Answer:hablas epsla ol

Explanation:

Hdeni

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