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SSSSS [86.1K]
4 years ago
14

What happens during evaporation? A liquid changes to a gas. A liquid changes to a solid. A gas changes to a liquid. A solid chan

ges to a liquid.
Physics
2 answers:
Dafna1 [17]4 years ago
8 0
A liquid changes to a gas
zimovet [89]4 years ago
6 0

Answer: Option (A) is the correct answer.

Explanation:

When a liquid state changes into gaseous state then this process is known as evaporation.

Since, molecules in a liquid are slightly away from each other as compared to molecules in a solid state. As molecules in a liquid state have more kinetic energy. But when heat is provided to a liquid then its molecules gain even more energy.

Thus, there occurs change in state from liquid to gas.

Hence, we can conclude that during evaporation a liquid changes to a gas.

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How does the orbital velocity of the earth compare to the of mercury?
zalisa [80]

After my ythorough researching, the orbital velocity of the Earth compare to the Mercury is relative to each other. In addition, Mercury orbits the Sun and it is within the Earth's orbit as its lesser or inferior. The correct answer to the following given statement above is relative to each other.

 

8 0
3 years ago
The surface charge density on an infinite charged plane is −1.70 x 10^−6 C/m^2 . A proton is shot straight away from the plane a
goldfiish [28.3K]

Answer:

Acceleration of proton will be -9.197\times 10^{12}m/sec^2

Explanation:

We have given surface charge density of an infinite charged plate \sigma = -1.70\times 10^{-6}C/m^2

Electric field due to infinite sheet charge is given by E=\frac{\sigma }{2\epsilon _0}=\frac{-1.7\times 10^{-6}}{2\times 8.85\times10^{-12}}=-0.096\times 10^6=-9.6\times 10^4N/C

Charge in proton is given by e=1.6\times 10^{-19}C

So force on proton F=qE=1.6\times 10^{-19}\times -9.6\times 10^4=-15.36\times 10^{-15}N

Mass of proton m=1.67\times 10^{-27}kg

According to newtons second law force F = mass × acceleration

So -15.36\times10^{-15}=1.67\times 10^{-27}a

a=-9.197\times 10^{12}m/sec^2

3 0
3 years ago
A small laser used as a pointer produces a beam of red light 5 mm in diameter, and has a power output of 5 milliwatts. What is t
Nata [24]

Answer:

434.0 V/m

Explanation:

The power output of the laser is:

P=5 mW = 0.005 W

while the radius of the beam is

r=\frac{5 mm}{2}=2.5 mm = 0.0025 m

so the cross-sectional area is

A=\pi r^2 = \pi (0.0025 m)^2=2.0\cdot 10^{-5} m^2

So the intensity of the laser beam is

I=\frac{P}{A}=\frac{0.005 W}{2.0\cdot 10^{-5} m^2}=250 W/m^2

The intensity of a laser beam is related to the magnitude of the electric field by

I=\frac{1}{2}c\epsilon_0 E^2

where

c is the speed of light

\epsilon_0 is the vacuum permittivity

Solving the formula for E, we find

E=\sqrt{\frac{2I}{c\epsilon_0}}=\sqrt{\frac{2(250 W/m^2)}{(3\cdot 10^8 m/s)(8.85\cdot 10^{-12} F/m)}}=434.0 V/m

4 0
3 years ago
What are the magnifications of the objective lenses
Anvisha [2.4K]

Answer:

Objective Lenses: Usually you find 3 or 4 objective lenses on a microscope. They almost always consist of 4x, 10x, 40x and 100x powers, when coupled with a 10x (most common) eyepiece lens, total magnification is 40x (4x times 10x) 100x, 400x and 1000x

Explanation:

Objective lenses come in various magnification powers, with the most common being 4x, 10x, 40x, and 100x, also known as scanning, low power, high power and typically oil immersion objectives, respectively

7 0
3 years ago
How much mili ampere is 2 ampere
Rasek [7]

Answer:

2000 mili ampere

Explanation:

1 ampere is = to 1000 miliampere so 2 x 1000 is equal to 2000 miliampere

8 0
3 years ago
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