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3 years ago

Explain the molecular concept of thermal energy.

Physics

1 answer:

MAVERICK [17]3 years ago

7 0

Answer:

The temperature of an object increases when the molecules that make up that object move faster. Thermal energy is energy possessed by an object or system due to the movement of particles within the object or the system.

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Which statement can be supported by using a position-time grap

Phoenix [80]

Answer:

A negative slope results when an individual is moving away

Explanation:

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3 years ago

A system undergoing a power cycle develops a steady power output of 0.3 kW while receiving energy input by heat transfer at a ra

uranmaximum [27]

Answer:

The thermal efficiency is 43%.

The total amount of energy developed by work is 397 kW in one year.

Explanation:

Given that,

Power output = 0.3 kW

Heat energy = 2400 Btu/h = 0.703 kW

We need to calculate the thermal efficiency

Using formula of efficiency

$\eta=\dfrac{out-put}{in-put}$

Put the value into the formula

$\eta=\dfrac{0.3}{0.703}$

$\eta=0.43\times100$

$\eta=43\%$

The thermal efficiency is 43%.

(b). We need to calculate the total amount of energy

Using formula of energy

$E=0.43\times0.703\times60\times60\times365$

$E=397209.06\ J$

$E=397\ kW$

Hence, The thermal efficiency is 43%.

The total amount of energy developed by work is 397 kW in one year.

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4 years ago

Scientific notation and graphing <br><br> 0.0004580 to scientific notation

Vlada [557]

Scientific Notation: 4.580 x 10^-4

Scientific e Notation: 4.580e-4

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3 years ago

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Which does a reference point provide? Select two options. a position from which to measure future distance a set of standard uni

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Answer:

hope this helps you :)

Explanation:

An object is in motion if its position changes relative to another object. To decide if you are moving, you can use your chair as a reference point. A reference point is a place or object used for comparison to determine if something is in motion.

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4 years ago

Damon purchased a pair of sunglasses that were advertised as being polarized. Describe how Damon could test the sunglasses to ve

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Answer:

To verify that they're polarized, he could hold the two lenses perpendicular (90 degrees) to each other, one lens in front of the other, and point it at a light source. If no light passes through then the lenses are polarized

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4 years ago