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3 years ago

PLEASE HELP ASAP!!! CORRECT ANSWER ONLY PLEASE!!! What types of waves are Sound Waves?

Physics

1 answer:

Eduardwww [97]3 years ago

3 0

Your answer would be D. Mechanical and Pressure/Longitudinal. This is because a sound wave is usually a type of pressure wave caused by the vibration of an object in a conductive medium such as air. These waves are also mechanical because they require a medium to travel through. This is also why sound simply cannot travel through vacuums like space, because they have no mediums in which sound can travel through.

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X = 1/2 a t square <br> Help me please

S_A_V [24]

How can I help? What’s the question?

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3 years ago

8459299

sergeinik [125]

Answer:

Mechanical energy is the energy that is possessed by an object due to its motion or due to its position. Mechanical energy can be either kinetic energy (energy of motion) or potential energy

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3 years ago

You just calculated that the heat of fusion for chloromethane is 6400 J/mol. The heat of fusion for hydrogen is 120 J/mol. Which

makkiz [27]

Answer:

Chloromethane experiences dipole-dipole interactions.

Chloromethane has a higher molar mass than hydrogen.

Explanation:

The molar mass is directly proportional to the heat of fusion, since the heavier the molecules the more energy they need to separate. Intermolecular forces are also directly proportional to the heat of fusion, because the greater the interaction they experience, the more energy they require to separate. The dipole-dipole interactions experienced by chloromethane are stronger than the interactions that take place in hydrogen.

4 0

3 years ago

The total annual U.S. energy consumption is about 2×1020 joules. Part A What is the average power requirement for the United Sta

Ksivusya [100]

Answer:

6.34 × 10¹² W

Explanation:

Given:

Annual consumption of energy in U.S. (E) = 2 × 10²⁰ J

Average power requirement is, $P_{avg}=?$

Now, we are given annual energy consumption. So, this means that, the energy consumption in a year is given.

Now, let us calculate the number of seconds in a year.

We know that,

1 year = 365 days

1 day = 24 hours

1 hour = 60 min

1 min = 60 s

Therefore, 1 year = 365 × 24 × 60 × 60 = 31536000 s

Now, the average power requirement in a year is given by the formula:

$P_{avg}=\frac{Total\ energy\ consumed}{Total\ time\ taken}$

Plug in the values given and solve for average power. This gives,

$P_{avg}=\frac{2\times 10^{20}\ J}{31536000\ s}\\\\P_{avg}=6.34\times 10^{12}\ J/s\\\\P_{avg}=6.34\times 10^{12}\ W\ \ \ [1\ W=1\ J/s]$

Therefore, the average power requirement for the United States, in watts is 6.34 × 10¹² W

4 0

4 years ago

A delivery truck leaves a warehouse and travels 2.60 km north. The truck makes a left turn and travels 1.25 km west before makin

yulyashka [42]

Answer:

4.19 km and 107.35 degrees north of east

Explanation:

So in the end, the truck is (2.6 + 1.4 = 4km) north and 1.25 km west from the warehouse. We can use the Pythagorean formula to calculate the magnitude and direction α of the truck displacement from the warehouse:

$s = \sqrt{s_n^2 + s_w^2} = \sqrt{4^2 + 1.25^2} = \sqrt{16 + 1.5625} = \sqrt{17.5625} = 4.19$ km

$tan\alpha = \frac{s_n}{s_w} = \frac{4}{1.25} = 3.2$

$\alpha = tan^{-1}3.2 = 1.27 rad \approx 72.65 degrees$ north or west or (180 - 72.65) = 107.35 degrees north of east

3 0

3 years ago