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chubhunter [2.5K]
2 years ago
8

As air rises, why do clouds form?

Physics
1 answer:
MissTica2 years ago
3 0

Answer:

C. the air cools to its dew-point temperature and condenses into liquid water

Explanation:

Clouds are formed when the air rises heated by terrestrial irradiation. As it warms, the air rises and rises until it reaches its dew point, which will be when the water vapor condenses on (dew) or ice crystals. These droplets, which have a spherical shape and measure between 0.004 and 0.1 mm, are in continuous motion when they are suspended in the air and when they are subjected to updrafts, so they collide with each other and group together. Depending on the atmospheric conditions, an increase in their thickness may occur so as to cause them to precipitate.

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How loudness of a sound wave depends on the intensity of the sound wave?
Anestetic [448]
Loudness of a sound wave is directly proportional to the intensity of the sound wave. In other words, when one increases, other also increases and vice-versa

Hope this helps!
3 0
3 years ago
A professor's office door is 0.91 m wide, 2.0 m high, and 4.0 cm thick; has a mass of 25 kg; and pivots on frictionless hinges.
olasank [31]

Answer:

F= 5.71 N

Explanation:

width of door= 0.91 m

door closer torque on door= 5.2 Nm

In order to hold the door in open position we need to exert an equal and opposite torque, to the door closer torque, on the door.

so wee need to exert 5.2 Nm torque on the door.

If we want to apply minimum force to exert the required torque we need to apply force perpendicularly on the door knob (end of door) so that to to greater moment arm.

T= r x F

T= r F sin∅

F= T/ (r * sin∅)

F= 5.2/ (0.91 * 1)

F= 5.71 N

5 0
3 years ago
A 72 kg skydiver can be modeled as a rectangular "box" with dimensions 21 cm × 41 cm × 170 cm . if he falls feet first, his drag
LuckyWell [14K]

Formula for terminal velocity is:


Vt = √(2mg/ρACd) 
<span>Vt = terminal velocity = ?
<span>m = mass of the falling object = 72 kg
<span>g = gravitational acceleration = 9.81 m/s^2
<span>Cd = drag coefficient = 0.80
<span>ρ = density of the fluid/gas = 1.2 kg/m^3</span>
<span>A = projected area of the object (feet first) = 0.21 m * 0.41 m = 0.0861 m^2

Therefore:</span></span></span></span></span>

Vt =  √(2 * 72 * 9.81 / 1.2 * 0.0861 * 0.80) 

<span>Vt = 130.73 m/s</span>

4 0
3 years ago
The density of 2 kilograms of iron on Earth's surface is
Eduardwww [97]

Answer:

B. The same on the moon.

Explanation:

The density of an object is the ratio of the mass contained by the object to the volume occupied by that mass.

Density = \frac{Mass}{Volume}

When the object is taken from the earth to anywhere in the universe, its mass remains constant. The dimensions of the object and hence its volume also remains constant anywhere in the universe.

Therefore, the density of the object will also remain the same as it depends upon the mass and the volume of the object.

So, the correct option is:

<u>B. The same on the moon.</u>

5 0
3 years ago
Help yall 13 points!!
Naya [18.7K]

Answer:

Explanation:

12.)

A. Opposite poles attract

B. Same poles repel

13.)

IDK

3 0
3 years ago
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