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3 years ago

On heating from low temperature at 1 atm of pressure which substance is most likely to sublime rather than melt?

1 answer:

5 0

Since the choices are not given, I can't give an exact answer. Sublimation is the physical change occurring from solid to gas. This is very rare because the molecular arrangement of a solid and gas are opposite to each other. Thus, it depends on the properties of the substance. For example, napthalene could sublime at room temperature.

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A conservative force on a particle moving along the x axis is given by F = (3x^2-2x)i. Which of the following is a potential tha

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2 years ago

Little is known about much of earth’s early history because ____.

denis23 [38]

The correct answer is D

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4 years ago

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According to Care-stream's operating manual, what is the acceptable range of exposure indicators?

Aleks [24]

Answer:

correct option is C. 1700 - 2300

Explanation:

solution

according to Care stream, exposure indicators provide the technical adequancy incident radiations on the x ray

and we muse care stream formula that is

Exposure Index EI = 1000 × $log_{10} (mR)$ + 2000

here 1 mR = 2000 EI

and 2 mR = 2300 EI

and 3 mR = 1700 EI

so here acceptable range of exposure indicators is 1700 - 2300

correct option is C. 1700 - 2300

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3 years ago

If the light shining on the metal becomes brighter, will the number of electrons being emitted per second (the photo-current)inc

attashe74 [19]

Answer:

The given statement is correct.

When the light becomes brighter then the electron emitted per second increases.

when light is incident on the metal it delivers energy in the form of small energy packets.

these small energy packets is known as photons.

More the intensity of light more the photon will be emitted.

Electron gain kinetic energy after absorbing energy from the photon.

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3 years ago

Butter melts when you heat it on a pan on the stove.is this a chemical changes or physical changes?

Stells [14]

Answer:

No chemical bonds are broken or formed in melting butter, so it is not a chemical change. The melting process is only a physical change, the change of state from solid to liquid.

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4 years ago

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