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icang [17]
3 years ago
12

Which image CORRECTLY shows how light behaves when it travels from air through glass?

Physics
1 answer:
sammy [17]3 years ago
7 0
Option - C is the right answer.
------------------------------------------------

When light travels from one medium to another, it refracts and bends.
Here, light travels from rarer medium (air) to denser medium (glass) so the light ray bends towards the normal.
And when it travels out from glass that is from denser medium to rarer medium(air) it bends away from the normal
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If a child ran into the road 65 to 70 feet ahead of your vehicle, what is the highest speed from which you could stop with good
Vlad [161]
Given:
Stopping distance range is d = (65, 70) ft.

The stopping distance, d, obeys this formula.
d = v²/(2μg)
where
v = speed of the vehicle
μ = 0.8, coefficient of static friction under good road conditions
g =  acceleration due to gravity, 32.2 ft/s²

Therefore
v = √(2*0.8*32.2*d) = 7.178√d

Test d = 65 ft.
v = 7.178√(65) = 57.87 ft/s = (57.87/88)*60 = 39.5 mph

Test d = 70 ft.
v = 7.178√(70) = 60.05 ft/s = 40.9 mph

To be safe, the lower speed of 39.5 mph is preferred.

Answer: 40 mph
3 0
3 years ago
Based on the law of conservation of energy, which statement is false?
il63 [147K]

Answer:

A

A. Energy is lost when machines don't work right.

4 0
3 years ago
Energy that is associated with the position or composition of an object is called
Pani-rosa [81]
That is potential energy.
4 0
3 years ago
A 60.00-cm guitar string under a tension of 50.000 N has a mass per unit length of 0.100 00 g/cm chegg
Evgen [1.6K]

Fundamental frequency,

f=v2l=T/μ−−−−√2l

=(50)/0.1×10−3/10−22×0.6−−−−−−−−−−−−−−−−−−−√

=58.96Hz

Let, n th harmonic is the hightest frequency, then

(58.93)n = 20000

∴N=339.38

Hence, 339 is the highest frequency.

∴fmax=(339)(58.93)Hz=19977Hz.

<h3>What is frequency?</h3>

In physics, frequency is the number of waves that pass a given point in a unit of time as well as the number of cycles or vibrations that a body in periodic motion experiences in a unit of time. After moving through a sequence of situations or locations and then returning to its initial position, a body in periodic motion is said to have experienced one cycle or one vibration. See also simple harmonic motion and angular velocity.

learn more about frequency refer:

brainly.com/question/254161

#SPJ4

7 0
2 years ago
Using F=ma, explain why a train is more difficult to start moving and more difficult to bring to a stop than an average sized ca
seropon [69]

Answer:

M_Train>> m_car    a_train <a_car

Explanation:

To start the movement of the train or the car, the motorcycle applies a force on the wheels, which starts the acceleration in the case of the train, it has a much greater mass than that of the car, for which to obtain the same acceleration necessary a much greater force

         a = F / m

as the mass of the train is greater than that of the car.

         a_train <a_car

Something similar happens when the vehicles stop, the engine stops applying force forward and the brakes apply a force backward that creates a negative acceleration that slows down, again as the mass of the train is much greater than the of the car its negative acceleration is much less.

   

It is good to clarify that to compensate for this the trains have a braking system on all wheels

6 0
3 years ago
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