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4 years ago

As a wave moves through a medium, particles are displaced and (2 points)

Physics

2 answers:

dolphi86 [110]4 years ago

7 0

Answer:A

Explanation:

Particles are displaced and return to their normal position after the wave passes

Eduardwww [97]4 years ago

5 0

Answer:

return to their normal position after the wave passes.

Explanation:

When a wave passes through a medium, it displaces particles. The position of maximum displacement is called the amplitude of the wave. How ever, a restoring force acts on the particle. This force is usually directed towards the mean rest position of the particle.

Hence after the wave passes, the particle is restored back to its mean rest position.

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A weightlifter lifts a weight of 500 N from the ground over her head, a distance of 1.8 m. How much work has been done to move t

Maksim231197 [3]

Answer is 900N

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3 years ago

A 200-kg object has a 50-Newton rightward net force being applied to it. What is the magnitude of the rightward acceleration on

katovenus [111]

The formula for acceleration is force divided by mass.

Force = 50 N

Mass = 200 kg

Acceleration = ???

$\frac{50}{200} = \frac{1}{4}$

$\frac{1}{4} = 0.25$

~~

Acceleration = 0.25 m/s²

~~

Next time use, f = ma in a triangle,

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I hope that helps you out!!

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4 years ago

Which of the following happens to an object in uniform circular motion?

podryga [215]

Answer:

As an object moves in a circle, it is constantly changing its direction. ... Accelerating objects are objects which are changing their velocity - either the speed (i.e., magnitude of the velocity vector) or the direction. An object undergoing uniform circular motion is moving with a constant speed.

5 0

4 years ago

A solid conducting sphere of radius 2 cm has a charge of 8microCoulomb. A conducting spherical shell of inner radius 4 cm andout

nika2105 [10]

Answer:

C) 7.35*10⁶ N/C radially outward

Explanation:

If we apply the Gauss'law, to a spherical gaussian surface with radius r=7 cm, due to the symmetry, the electric field must be normal to the surface, and equal at all points along it.
So, we can write the following equation:

$E*A = \frac{Q_{enc} }{\epsilon_{0}} (1)$

As the electric field must be zero inside the conducting spherical shell, this means that the charge enclosed by a spherical gaussian surface of a radius between 4 and 5 cm, must be zero too.
So, the +8 μC charge of the solid conducting sphere of radius 2cm, must be compensated by an equal and opposite charge on the inner surface of the conducting shell of total charge -4 μC.
So, on the outer surface of the shell there must be a charge that be the difference between them:

$Q_{enc} = - 4e-6 C - (-8e-6 C) = + 4 e-6 C$

Replacing in (1) A = 4*π*ε₀, and Qenc = +4 μC, we can find the value of E, as follows:

$E = \frac{1}{4*\pi*\epsilon_{0} } *\frac{Q_{enc} }{r^{2} } = \frac{9e9 N*m2/C2*4e-6C}{(0.07m)^{2} } = 7.35e6 N/C$

As the charge that produces this electric field is positive, and the electric field has the same direction as the one taken by a positive test charge under the influence of this field, the direction of the field is radially outward, away from the positive charge.

6 0

4 years ago

Which sound wave would travel at the fastest speed?.

n200080 [17]

Answer:

Solids

Explanation:

Sound travels fastest through solids. This is because molecules in a solid medium are much closer together than those in a liquid or gas, allowing sound waves to travel more quickly through it. In fact, sound waves travel over 17 times faster through steel than through air.

4 0

3 years ago