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belka [17]
3 years ago
11

5. What do you think? At a baseball game, when you are far from the batter, you might see the batter hit the ball before you hea

r the sound of the hit. Why do you think this
happens?
Physics
1 answer:
STatiana [176]3 years ago
5 0

Answer:

The speed of sound in air is lower compared to in solids and liquids.

Explanation:

Sound is a wave that can be generated by a vibrating body. Its speed through different media differs due to the nature of the media.

Since the molecules of solids are closely packed, sound can be easily transferred from one molecule to another at a faster rate. Thus, the high speed of sound in solids.

In liquids, the molecules are not as closely packed as solids. So that  the speed of sound though liquids is lower compared to that of solids. Gases has its molecules farther apart, thus making the speed of sound through it the lowest compared to solids and liquids.

Therefore the sound of the batter hitting the ball is heard latter, due to its lower speed through the air.

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A ball is thrown straight up into the air, with an initial speed of 18.2 m/. How far has it gone after 1.00 s?
dalvyx [7]
The distance that the ball was able to travel at a given time is calculated through the equation,

    d = Vot + (1/2)(g)(t²)

Then, we substitute the known values from the given above,

   d = (-18.2 m/s)(1 s) + 0.5(-9.8 m/s²)(1 s)²
     d= -23.1 m

Thus, the distance traveled by the ball after an hour is equal to 23.1 m

<em>ANSWER: 23.1 m</em>
6 0
3 years ago
A tennis ball is hit with an initial velocity of 15 m/s at an angle of
Murljashka [212]

Answer:

Horizontal acceleration is 0 in a projectile motion

Explanation:

first we have to find the horizontal velocity

15cos40 = 11.49ms^-1

and then use the following equation to find the distance

s  = ut +   \frac{1}{2} a {t}^{2}  \\ s = 11.49 \times 2 \\s = 22.98m

8 0
3 years ago
Anatomy and Phys PLEASE HELP
Alina [70]

         

                  least two STDs that are caused by different microorganisms (such as bacteria, viruses, and so on). Propose at least two ethical strategies for helping to prevent these STDs OTHER THAN abstinence and male and female condoms.

6 0
3 years ago
1. What is the momentum of a 0.15 kg arrow that is traveling at 120 m/s?
Korvikt [17]

For this case we have that by definition, the momentum equation is given by:

p = m * v

Where:

m: It is the mass

v: It is the velocity

According to the data we have:

m = 0.15 \ kg\\v = 120 \frac {m} {s}

Substituting:

p = 0.15 * 120\\p = 18 \frac {kg * m} {s}

On the other hand, if we clear the variable "mass" we have:

m = \frac {p} {v}

According to the data we have:

p = 250 \frac {kg * m} {s}\\v = 5 \frac {m} {s}\\m = \frac {250} {5}\\m = 50 \ kg

Thus, the mass is 50 \ kg

Answer:

p = 18 \frac {kg * m} {s}\\m = 50 \ kg

3 0
3 years ago
Look at the circuit diagram. <br><br> What type of circuit is shown?
Nimfa-mama [501]

Answer:

Its a parallel connection

Explanation:

The bulbs aren't in one line but two different parts, which makes it a parallel connection instead of a series connection.

7 0
4 years ago
Read 2 more answers
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