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CaHeK987 [17]
2 years ago
12

The density of a gas sample in a balloon is 1.50 g/l at 75°c. what is the density of this gas when the temperature is changed t

o 25°c at constant pressure?
Physics
1 answer:
maksim [4K]2 years ago
8 0

At 25°C, a gas sample's density in the balloon is 4.500 g/L.

When density decreases, temperature increases. When more temperature increases, density reduces. When the temperature decrease, density increases.

When a substance is heated, the molecules move faster and slightly farther apart, taking up more space and causing the density to drop. When something is cooled, the molecules slow down and get a little closer together, taking up less space and becoming denser.

The density of a gas sample in a balloon = 1.50 g/L

Temperature = 75°C

Temperature increased = 25°C

The density of a gas sample in the balloon at 25°C = (1.50 × 75)/ 25

                                                                                      = 4.500 g/L

Therefore, the density of a gas is 4.500 g/L.

Learn more about density here:

brainly.com/question/6838128

#SPJ4

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Answer:

a. Light pollution refers to light used for human activities that brightens the sky and hinders astronomical observations.

Explanation:

Light pollution is due to the excessive and misdirected use of artificial light. Light bulbs are often design in an incorrect way, since a great part of its light is not completely directed to the ground and an important percentage is emitted to the sky in where will be scattered and reflected back to ground by the particles in the atmosphere. That brings as an effect a sky glow, therefore the visibility of astronomical objects will be extremely reduce.  

Hence, professional astronomical research and amateur observations will be affected. Light pollution has a negative impact on bird migration at night and in the health of difference species, humans also.          

8 0
3 years ago
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A stationary siren emits sound of frequency 1000 Hz and wavelength 0.343 m. An observer who is moving toward the siren will meas
Ainat [17]

Answer:

f>1000Hz and wavelength=0.343 m

Explanation:

We are given that

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When a observer is moving towards the siren then the frequency increases.

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The wavelength depends upon the speed of source.

But we are given that siren is stationary.

Therefore, source is not moving and then the wavelength remains same.

f>1000Hz and wavelength=0.343 m

4 0
3 years ago
the light from andromeda galaxy takes about 2.6 million years to reach earth. which of these statements is correct about the and
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7 0
3 years ago
PLEASE HELP !!
kumpel [21]

Answer:

Movement Time

explanation:

5 0
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A student weighing 700 N climbs at constant speed to the top of an 8 m vertical rope in 10 s. The average power expended by the
Goshia [24]

To solve this problem we will use the concepts related to power, defined as the amount of energy applied over a period of time.

The energy in this case is the accumulated in the form of potential energy, over a period of time. Thus we will have that the mathematical expression of the power can be expressed as

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As the energy is equal to the potential Energy we have tat

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Therefore the correct answer is A.

8 0
3 years ago
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