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4 years ago

As light from air to water to glass, it will refract. The best explanation for this would be

Physics

2 answers:

oksano4ka [1.4K]4 years ago

8 0

The speed of a wave slows as it travels at different speed in different media. This is what causes the light to bend.

diamong [38]4 years ago

6 0

It d I took the test

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To test the quality of a tennis ball, you drop it onto the floor from a height of 4.00 m. It rebounds to a height of 2.00 m. If

arlik [135]

Answer:

Part a)

$a = 1260.3 m/s^2$

Part b)

Direction = upwards

Explanation:

When ball is dropped from height h = 4.0 m

then the speed of the ball just before it will strike the ground is given as

$v_f^2 - v_i^2 = 2 a d$

$v_1^2 - 0^2 = 2(9.81)(4.0)$

$v_1 = 8.86 m/s$

Now ball will rebound to height h = 2.00 m

so the velocity of ball just after it will rebound is given as

$v_f^2 - v_i^2 = 2 a d$

$0 - v_2^2 = 2(-9.81)(2.00)$

$v_2 = 6.26 m/s$

Part a)

Average acceleration is given as

$a = \frac{v_f - v_i}{\Delta t}$

$a = \frac{6.26 - (-8.86)}{12.0 \times 10^{-3}}$

$a = 1260.35 m/s^2$

Part B)

As we know that ball rebounds upwards after collision while before collision it is moving downwards

So the direction of the acceleration is vertically upwards

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3 years ago

1. An object has a mass of 10g and a volume of 50mL. What is the density?

Alona [7]

1. 0.2 g/mL

The relationship between mass, density and volume of an object is

$d=\frac{m}{V}$

where

d is the density

m is the mass

V is the volume

For the object in this problem, we have

m = 10 g

V = 50 mL

Substituting into the equation,

$d=\frac{10}{50}=0.2 g/mL$

2. 10 mL

In this exercise we know:

- The density of the object: d = 2 g/mL

- The mass of the object: m = 20 g

Therefore, we can re-arrange the previous equation to find the volume:

$V=\frac{m}{d}$

And substituting values into the equation, we find

$V=\frac{20}{2}=10 mL$

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3 years ago

You are most likely sitting in a room that is around 299 K. What is this temperature of the room in Celsius

Rom4ik [11]

Answer:

25.85 °C

Explanation:

To convert from ° C to K

SUBTRACT 273.15

299 - 273.15 = 25.85 °C

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2 years ago

What is a good way to study guys for a science test Im in need because I have a quiz tmrw

nikklg [1K]

Answer:

Space out your studying. Nate Kornell “definitely did cram” before big tests when he was a student. ...

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Mix it up. ...

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3 years ago

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Answer:

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3 years ago