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4 years ago

Which best describes what happens when light traveling through air enters water at an angle?

Physics

2 answers:

vovangra [49]4 years ago

3 0

I think it is "A'' 'It moves along straight lines in air and changes direction when it enters water.

galben [10]4 years ago

3 0

The correct choice is

A. It moves along straight lines in air and changes direction when it enters water.

This is because of phenomenon of refraction which a ray of light experience when it moves from one medium to another medium. The light ray bends away from the normal to the surface if it travels from denser to rarer medium. The light ray bends towards from the normal to the surface if it travels from rarer to denser medium.

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PLEASE HELP AS SOON AS POSSIBLE!!!

Brums [2.3K]

Answer:

h = 81.63 m

Explanation:

Given that,

The speed of the car, v = 40 m/s

We need to find the height when the car comes to rest. We can use the conservation of energy to find it i.e.

$mgh=\dfrac{1}{2}mv^2\\\\h=\dfrac{v^2}{2g}\\\\h=\dfrac{(40)^2}{2\times 9.8}\\\\h=81.63\ m$

So, it will reach to a height of 81.63 m and comes to rest.

7 0

3 years ago

What is the term that causes winds to curve

slava [35]

The Coriolis force causes the wind to curve.

5 0

3 years ago

If the mass of an object is 14 lbm, what is its weight, in lbf, at a location where g = 32.0 ft/s2?

mixas84 [53]

Using the formula:

w = m x g ....... eq1

here w is weight of the object.

m is mass of the object, and

g is the acceleration of gravity.

mass, m = 14 lbm (given)

acceleration of gravity, g= 32.0 ft/ $s^{2}$

Now, substituting the values in equation (1):

w = 14lbm x 32.0 ft/ $s^{2}$ = 448 lbm ft/ $s^{2}$

since, 1 lbf = 32.174 lbm ft/ $s^{2}$

so, w = 448 x $\frac{1}{32.174}$

w = 13.924lbf

Hence, the mass of an object is 13.924 lbf.

To know more about such questions, visit:

brainly.com/question/10936674

#SPJ4

3 0

2 years ago

Energy that does not involve the large-scale motion or position of objects in a system is called:

Artemon [7]

This type of energy is called non mechanical energy so the answer is C

8 0

3 years ago

A three-wheeled car moving along a straight section of road starts from rest, accelerating at 2.00 m/s2 until it reaches a speed

DiKsa [7]

Answer:

(a) Total time = 105.5 sec

(b)average speed = 31.26 m/sec

Explanation:

We have given that three-wheeled car starts from rest that initial velocity u = 0 m/sec

Final velocity = 35 m/sec

Acceleration $a=2m/sec^2$

According to first law of motion we know that v = u+at

So $35=0+2\times t$

t = 17.5 sec

After this car travels 83 sec at a constant speed and after that it takes 5 sec additional time to stop

(a) So total time in which car is in motion = 17.5+83+5 = 105.5 sec

(b) Total distance traveled during first 17.5 sec

$s=ut+\frac{1}{2}at^2=0\times 17.5+\frac{1}{2}\times 2\times 17.5^2=306.25m$

Distance traveled in 83 sec with with velocity of 35 m/sec = $35\times 83=2905m$

For next 5 second

Initial velocity u = 35 m/sec

Final velocity = 0 as finally car stops

So $a=\frac{v-u}{t}=\frac{0-35}{5}=-7m/sec^2$

Distance traveled $s=ut+\frac{1}{2}at^2=35\times 5+\frac{1}{2}\times -7\times 5^2=87.5m$

So total distance traveled = 306.25+2905+87.5 = 3298.75 m

Total time = 105.5 sec

So average speed $=\frac{total\ distance}{total\ time }=\frac{3298.75}{105.5}=31.26m/sec$

5 0

3 years ago