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3 years ago

What is the best description of a mechanical wave?

Physics

1 answer:

gizmo_the_mogwai [7]3 years ago

8 0

Answer:

A mechanical wave is a wave that is an oscillation of matter, and therefore transfers energy through a medium. While waves can move over long distances, the movement of the medium of transmission—the material—is limited. Therefore, the oscillating material does not move far from its initial equilibrium position.

Explanation:

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The figure shows the motion of electrons in a wire which is near the North pole of a magnet. The wire will be pushed:

zhuklara [117]

Answer:

D. upwards

Explanation:

The electron moves in the direction opposite to the current (by definition)

Since the field is out of the N pole the electron will be deflected DOWNWARD

If the direction is reversed then it will be deflected UPWARD

7 0

3 years ago

8 POINTS AND MARK BRAINIEST:

lesya692 [45]

The answer is A i just took the test.

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3 years ago

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A moving curling stone, A, collides head on with stationary stone, B. Stone B has a larger mass than stone A. If friction is neg

Kitty [74]

Answer:

The correct answer is option 'c': Smaller stone rebounds while as larger stone remains stationary.

Explanation:

Let the velocity and the mass of the smaller stone be 'm' and 'v' respectively

and the mass of big rock be 'M'

Initial momentum of the system equals

$p_i=mv+0=mv$

Now let after the collision the small stone move with a velocity v' and the big roch move with a velocity V'

Thus the final momentum of the system is

$p_f=mv'+MV'$

Equating initial and the final momenta we get

$mv=mv'+MV'\\\\m(v-v')=MV'.....i$

Now since the surface is frictionless thus the energy is also conserved thus

$E_i=\frac{1}{2}mv^2$

Similarly the final energy becomes

$E_f=\frac{1}{2}mv'^2+\frac{1}{2}MV'^2$ \

Equating initial and final energies we get

$\frac{1}{2}mv^2=\frac{1}{2}mv'^2+\frac{1}{2}MV'^2\\\\mv^2=mv'^2+MV'^2\\\\m(v^2-v'^2)=MV'^2\\\\m(v-v')(v+v')=MV'^2......(ii)$

Solving i and ii we get

$v+v'=V'$

Using this in equation i we get

$v'=\frac{v(m-M)}{(M-m)}=-v$

Thus putting v = -v' in equation i we get V' = 0

This implies Smaller stone rebounds while as larger stone remains stationary.

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3 years ago

3. When you graph the motion of an object, you put ____ on the horizontal axis and ____ on the axis. a. speed, time b. dis

Papessa [141]

The answer is B. distance , Time

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3 years ago

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What is a GOOD AND DETAILED introduction on a thermos. will be awarded 25 points im desperate

ANEK [815]

A thermos as another name - it's called the vacuum flask. It's used for<span> storing cryogens when it has certain boiling points that are much lower than the actual room temperature. Many people use thermoses as a cup for drinking, specifically coffee, teas, and other hot drinks.

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3 years ago