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2 years ago

7

The diagram shows a stone suspended under the surface of a liquid from a string. The stone experiences a pressure caused by the

liquid. liquid string stone.

1 answer:

Ivan2 years ago

6 0

Where is the diagram? What is the question?

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The critical angle for water is 49°. If a ray of light

Sonja [21]

Answer:

Snell's Law states

Ni sin i = Nr sin r

Judging from the question the source of the ray is in the water (directed up)

or NI = 1 / sin 49 Ni = 1.325 deg the critical angle

From inside the pond:

Nr = 1.325 * sin 45 / 1 = 94 deg

So refraction can occur outside the pond and you do not have total internal refection.

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3 years ago

You are discussing a material that has a strong resistance to the flow of electrons. This is a description of a(n)

cupoosta [38]

C. Insulator

It COULD be semi-insulator but i'm sure its C

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3 years ago

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Select the words that make the sentence a true statement.

ZanzabumX [31]

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1. force

2. greater

Explanation:

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3 years ago

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Graphs often permit scientists to make estimations for items when there is no data. Please select the best answer from the choic

Zinaida [17]

Answer:

no they don't but I think it's 8

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2 years ago

As an aid in working this problem, consult Interactive Solution 3.41. A soccer player kicks the ball toward a goal that is 20.0

alekssr [168]

Answer:

V=14.9 m/s

Explanation:

In order to solve this problem, we are going to use the formulas of parabolic motion.

The velocity X-component of the ball is given by:

$Vx=V*cos(\alpha)\\Vx=15.7*cos(31^o)=13.5m/s$

The motion on the X axis is a constant velocity motion so:

$t=\frac{d}{Vx}\\t=\frac{20.0}{13.5}=1.48s$

The whole trajectory of the ball takes 1.48 seconds

We know that:

$Vy=Voy+(a)*t\\Vy=15.7*sin(31^o)+(-9.8)*(1.48)=-6.42m/s$

Knowing the X and Y components of the velocity, we can calculate its magnitude by:

$V=\sqrt{Vx^2+Vy^2} \\V=\sqrt{(13.5)^2+(-6.42)^2}=14.9m/s$

6 0

3 years ago