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alukav5142 [94]
3 years ago
15

The number line shows the starting and ending velocities for ball 1. What’s the change in velocity of ball 1? Calculate the valu

e mathematically, and check it using the number line.

Physics
2 answers:
gizmo_the_mogwai [7]3 years ago
6 0

Answer:

The starting velocity for ball 1 is 1.00 meter/second. Its ending velocity is -0.50 meter/second.

The change in velocity for ball 1 is -0.50 – 1.00 = -1.50 meters/second.

Explanation:

yee hope it helps

djverab [1.8K]3 years ago
5 0

Answer:

The starting velocity for ball 1 is 1.00 meter/second. Its ending velocity is 0.25 meter/second.

The change in velocity for ball 1 is 0.25 – 1.00 = -0.75 meter/seconds

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Tomtit [17]

Answer:

decrease the area in the second cylinder

Explanation:

In a two-cylinders pneumatic system, the pressure exerted on the first cylinder is equal to the pressure on the second cylinder:

p_1 = p_2

We can rewrite the pressure as product between force (F) and area (A) of the cylinder:

F_1 A_1 = F_2 A_2

In this system, the output force should be 4 times the input force:

F_2 = 4 F_1

Substituting into the previous equation, we get:

F_1 A_1 = 4 F_1 A_2\\A_2 = \frac{A_1}{4}

This means that the area of the second cylinder must be 1/4 of the area of the first cylinder, so the correct answer is

decrease the area in the second cylinder

8 0
3 years ago
a. A beam of light is incident from air on the surface of a liquid. If the angle of incidence is 26.7° and the angle of refracti
Diano4ka-milaya [45]

Answer:

(a). The critical angle for the liquid when surrounded by air is 44.37°

(b). The angle of refraction is 26.17°.

Explanation:

Given that,

Incidence angle = 26.7°

Refraction angle = 18.3°

(a). We need to calculate the refraction of liquid

Using Snell's law

n=\dfrac{\sin i}{\sin r}

Put the value into the formula

n=\dfrac{\sin 26.7}{\sin 18.3}

n=1.43

We need to critical angle for the liquid when surrounded by air

Using formula of critical angle

C=\sin^{-1}(\dfrac{1}{n})

Put the value into the formula

C=\sin^{-1}(\dfrac{1}{1.43})

C=44.37^{\circ}

(b). Given that,

Incidence angle = 37.5°

Speed of light in mineral v=2.17\times10^{8}\ m/s

We need to calculate the index of refraction

Using formula of index of refraction

n=\dfrac{c}{v}

Put the value into the formula

n=\dfrac{3\times10^{8}}{2.17\times10^{8}}

n=1.38

We need to calculate the angle of refraction

Using Snell's law

n=\dfrac{\sin i}{\sin r}

\sin r=\dfrac{\sin i}{n}

Put the value into the formula

\sin r=\dfrac{\sin 37.5}{1.38}

r=\sin^{-1}(\dfrac{\sin 37.5}{1.38})

r=26.17^{\circ}

Hence, (a). The critical angle for the liquid when surrounded by air is 44.37°

(b). The angle of refraction is 26.17°.

3 0
3 years ago
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jonny [76]
I might be wrong but I’d say the first one

Answer:
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Explanation:
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-YW!! <33
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3 years ago
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Answer:

Explanation:

A physical property is a characteristic of matter that is not associated with a change in its chemical composition. Familiar examples of physical properties include density, color, hardness, melting and boiling points, and electrical conductivity.

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alina1380 [7]

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8 0
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