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alina1380 [7]
3 years ago
8

What medium is often used to transfer computer information? a. Air c. Glass b. Water d. Optic fibers Please select the best answ

er from the choices provided
Physics
1 answer:
Readme [11.4K]3 years ago
7 0
I would pick the only one that makes sense, D. optic fibers

Brainliest please
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In a pool game, the cue ball, which has an initial speed of 3.0 m/s, make an elastic collision with the eight ball, which is ini
zhenek [66]

Explanation:

Given

initial speed(u)=3 m/s

mass of each ball is m

Let the cue ball is moving in x direction initially

In elastic collision Energy and momentum is conserved

Let u be the initial velocity and v_1 , v_2 be the final velocity of 8 ball and cue ball respectively

\frac{mu^2}{2}+0=\frac{mv^2_1}{2}+\frac{mv^2_2}{2}

The angle after which cue ball is deflected is given by

\theta _1=90-40=50^{\circ}

Conserving momentum in x direction

mu=mv_1cos40+mv_2cos50

3=v_1cos40+v_2cos50

Along Y axis

0+0=v_1sin40-v_2sin50

v_1sin40=v_2sin50

substitute the value of v_1

we get v_2=1.912 m/s

v_1=2.27 m/s

5 0
3 years ago
Liz puts a 1 kg weight and a 10 kg on identical sleds. She then applies a 10N force to each sled. Which does not explain why the
Mariana [72]
Answer: C

Explanation:
The acceleration does not depend directly on the mass of the object.

Newton's Law is Force = Mass x Acceleration.
Therefore, Acceleration  = Force/Mass

The same force is applied in both cases.
Therefore acceleration is inversely proportional to mass.
As mass decreases, acceleration increases.

3 0
4 years ago
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A ball thrown vertically upward reaches a certain height and comes down again. What can you say about its kinetic energy at the
MrRissso [65]
The K.E. at the maximum height is zero, no matter what that height is.
4 0
3 years ago
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A thin, circular hoop with a radius of 0.22 m is hanging from its rim on a nail. When pulled to the side and released, the hoop
Alex73 [517]

Answer:

Period of oscillation = 1.33 seconds

Explanation:

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for I = 2MR² and L = R,

Given: L = 0.22m = R

T = 2π√[2R/g] 

T = 2 × 3.142 Sqrt[( 2 × 0.22)/ 9.8]

T = 6.284 Sqrt(0.44/9.8)

T = 6.284 Sqrt(0.0449)

T = 6.284 × 0.2119

T = 1.33 sec

6 0
4 years ago
Which properties can be used to determine whether a substance is a liquid or a plasma? Check all that apply.
lapo4ka [179]
Plasma is the state of mater after gases. Its where the gas forms ions. The state is made of charged particles. 
So, the best test for plasma is C and D.
    The charge of the substance's particles and 
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6 0
3 years ago
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