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2 years ago

If the speed of light in a substance is 2.26 x 10^8 m/s, what is the index of refraction of that substance?

Physics

1 answer:

vladimir1956 [14]2 years ago

4 0

Answer:

1.33

Explanation:

speed of light in vacuum, c = 3 x 10^8 m/s

speed of light in medium, v = 2.26 x 10^8 m/s

The refractive index of the medium is given by

μ = speed of light in vacuum / speed of light in medium

μ = (3 x 10^8) / (2.26 x 10^8)

μ = 1.33

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The white ring seen here, within our solar system, is a(n) ________ belt.

Gelneren [198K]

Asteroid belt :-) hope it helped

3 0

2 years ago

Read 2 more answers

Two cars are traveling along perpendicular roads, car A at 40 mi/hr, car B at 60 mi/hr. At noon, when car A reaches the intersec

Serggg [28]

Answer:

$\frac{dD}{dt} = -4 miles/hour$

negative sign indicates that the distance is decreasing with time

Explanation:

Let at any time t after noon that is 12 p.m.

distance traveled by car A = 40t

distance traveled by car B = 90-60t

then distance between the two cars at time t

$D^2= (40t)^2+(90-60t)^2$ ............1

also, at time 1 p.m.

distance $D^2= (40\times1)^2+(90-60\times1)^2$

D=50 Km

differentiating equation 1 w.r.t. t we get

$2D\frac{dD}{dt}= 2\times40t\times40+2(90-60t)(-60)$

put t= 1 and D= 50 we get

$2\times50\frac{dD}{dt}= 3200\times1-3600\times1$

$\frac{dD}{dt} = -4 miles/hour$

3 0

2 years ago

How does something become charged using friction?

KonstantinChe [14]

Answer:

"Where friction or rubbing results in the transfer of electrons between particles, objects can become negatively or positively charged."

Explanation:

The motion resistance of one moving object with respect to another is called as "Friction". It isn't a basic force, like gravity or electromagnetism. Alternatively, scientists believe it is the product of the electromagnetic attraction in two touching surfaces between charged particles.

The friction have formula:

Friction force (f ) = coefficient of friction × normal force (N)

For an instances when one ride a bicycle, an example of rolling friction is the contact between the wheel and the way.

4 0

3 years ago

an airplane is moving with a constant velocity in level flight. compare the magnitude of the forward force by the engines to the

Iteru [2.4K]

The two forces are equal in magnitude

Explanation:

We can answer this question by applying Newton's second law of motion, which states that

$\sum F = ma$

where

$\sum F$ is the net force acting on an object

m is the mass of the object

a is its acceleration

In this problem, the airplane is moving with constant velocity, so its acceleration is zero:

a = 0

This means that the equation becomes

$\sum F = 0$

There are two forces acting on the airplane in the horizontal direction:

- The forward force exerted by the engine, F

- The frictional drag force, D, backward

So the net force on the plane along the horizontal direction is

$\sum F = F-D$

However we also said that

$\sum F = 0$

Combining the two equations, we find

$F-D=0 \rightarrow F=D$

So, the two forces have same magnitude.

Learn more about Newton's second law:

brainly.com/question/3820012

#LearnwithBrainly

5 0

2 years ago

How would the cost of operating a 30 watt bulb relate to the cost of operating a 60 watt bulb for a given amount of time?

never [62]

Utility companies charge based on consumption in kWh. Range of approximately 3 to 10 cents per kWh (rates vary by locale)

So consumption is directly proportional to watts of the load.

A 30 watt light bulb running for 100 hrs
would cost half of what a 60 watt bulb burning for the same time frame.

30 x 100= 3 KWh

60 x 100= 6 kWh

So use LED lights that give same lumens for much less watts of power

6 0

2 years ago