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2 years ago

What happens to temperature of a substance during phase change

Physics

1 answer:

mrs_skeptik [129]2 years ago

5 0

Answer: Nothing

Explanation:

The supplied energy is used for phase transition, not molecule kinetic energy.

Example: ice cannot be heated above 0Cº when it is being melted. Heat is consumed for phase change during its transition from solid to liquid. Only after all ice has melted, the temperature will rise until the next phase transition - vapor.

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The standard measure used to compare sound intensities is the ______ .

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The answer is Decibels.

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3 years ago

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Suppose an automobile has 2000-joules of kinetic energy. when it moves at twice the speed, what will be its kinetic energy? what

NeX [460]

Answer:

K.Eₓ = 4 K.E

K.Eₓ = 9 K.E

Explanation:

Th formula for the kinetic energy of a body is given as follows:

$K.E = \frac{1}{2}mv^2\\$ ---------------equation (1)

where,

K.E = Kinetic Energy of Automobile

m = mass of automobile

v = speed of automobile

For twice speed:

vₓ = 2v

then,

$K.E_{x} = \frac{1}{2}mv_{x}^2\\K.E_{x} = \frac{1}{2}m(2v)^2\\K.E_{x} = 4\frac{1}{2}mv^2\\$

using equation (1):

K.Eₓ = 4 K.E

For thrice speed:

vₓ = 3v

then,

$K.E_{x} = \frac{1}{2}mv_{x}^2\\K.E_{x} = \frac{1}{2}m(3v)^2\\K.E_{x} = 9\frac{1}{2}mv^2\\$

using equation (1):

K.Eₓ = 9 K.E

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3 years ago

Four states of matter and describe the particles arrangement of each

frutty [35]

Answer:

There are four natural states of matter: Solids, liquids, gases and plasma.

Explanation:

The fifth state is the man-made Bose-Einstein condensates. In a solid, particles are packed tightly together so they don't move much.

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3 years ago

A one-piece cylinder has a core section protruding from the larger drum and is free to rotate around its central axis. A rope wr

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Answer:

The net torque is 0.4962 N m

Explanation:

please look at the solution in the attached Word file

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3 years ago

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The box of a well-known breakfast cereal states that one ounce of the cereal contains 113 Calories (1 food Calorie = 4186 J). If

mafiozo [28]

Answer:

$m=454.73 kg$

Explanation:

To convert the energy of the cereal to know the weight:

$m*g*h=Q'$

$Cal=0.0179*113 Cal=2.0227Cal$

$Q'=2.0227Cal*\frac{4186J}{1Cal}$

$m*g*h=8467.02J$

$m*g=\frac{Q'}{h}=\frac{8467.02J}{1.90m}$

$m*g=4456.33 N$

Supuse the gravity as a g=9.8m/s^2

$m=\frac{4456.33N}{9.8m/s^2}$

$m=454.73 kg$

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3 years ago

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