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yKpoI14uk [10]
4 years ago
8

When enough ____ is added to the substance, the solid reaches its ____ point and becomes a liquid

Physics
1 answer:
Ratling [72]4 years ago
8 0

Answer:  When enough __energy__ is added to the substance, the solid reaches its _melting_ point and becomes a liquid

Explanation: since energy is being added the substance changes phase into a liquid .

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Which of the following is the correctly abbreviated SI unit describing the mass of an object?
Aloiza [94]

The correct answer would be kg!

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3 years ago
An airplane flies 250.0 km at 300 m/s. How long does this take?​
givi [52]
Im not sure if this is physics or mathematics. but if 300 msec then per minute this will equal to 300 X 60 sec =18000 m per minute
3 0
3 years ago
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When a sound wave moves past a point inair, what happens to the density of air at thispoint?1.There is no change in the density
Westkost [7]

Answer:

2.The density of air increases and thendecreases as the sound wave passes.

Explanation:

Sound waves are mechanical waves, which consist of oscillation of the particles in the medium where the wave is transmitted through.

Sound waves are also longitudinal waves, which means that the direction of oscillations of the particles of the medium occurs in a direction parallel to the direction of motion of the wave (so, essentially back and forth).

Due to the nature of longitudinal waves, they create alternating regions of the medium where the density of particles are higher and lower. The former are called compressions, while the latter are called rarefactions.

Therefore, when a sound wave travels through the air, the density of one region of air continuously changes: compression first (high density), rarefaction then (lower density), then compression again, etc..

8 0
3 years ago
What do you guys know about emotional intelligence? And how is it used in the real world?
tester [92]
Emotional Intelligence is our own abilities of being able to identify and regulate our own emotions. This is used by individuals in the real world in order to regulate crying in front of everyone for example. Calming ourselves down by breathing is another good example of regulating emotion which plays into emotional intelligence.

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7 0
3 years ago
In order to cool 1 ton of water at 20°C in an insulated tank, a person pours 140 kg of ice at –5°C into the water. The specific
salantis [7]

Answer:

T = 6.31 ^0 C

Explanation:

1 ton = 907.2 kg

so here heat given by water = heat absorbed by the ice

so by energy balance we will have

Q_1 = Q_2

mL + ms\Delta T_1 + ms\Delta T_2 = ms\Delta T_3

so we have

140(2.11)(5) + 140(333.7) + 140(4.18)(T) = 907.2(4.18)(20 - T)

48195 + 585.2 T = 75841.9 - 3792.1 T

T = \frac{27646.92}{4377.3}

T = 6.31 ^0 C

7 0
3 years ago
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