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3 years ago

If you hold your hand over a pot of boiling water, it feels hot. Explain how the boiling water is transforming heat to your hand

2 answers:

8 0

I don't no if this helps but the body heat from your hand causes the liquid to boil, which in turn makes the liquid evaporate, turning it to gas. The expanding gas pushes the liquid upwards and when you release your hand, equilibrium is re-established.

iragen [17]3 years ago

7 0

Answer:

Conduction

Explanation:

The boiling heat is transforming heat to my hand through conduction. Conduction is a mode of heat transfer which is the transfer of heat from one body to another without any actual movement of the bodies. It does not occur in vacuum.

In conduction, heat is transferred from a region of high temperature to a region of low temperature. This means that the temperature of the pot of boiling water is higher than that of the hand and as such heat will be transferred from the pot to the hand due to temperature gradient. Note that there is no need need for the bodies in question (pot and the hand) to move before the heat will be transferred.

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2 years ago

Light travels at the rate of 300,000 kilometers per second in a vacuum." Which of these statements is correct about this law? It

Zarrin [17]

Answer: It is an observation which cannot be explained.

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3 years ago

Which change will cause the gravitational force between a baseball and a soccer ball to increase? Select three options.

Sholpan [36]

moving the balls closer together

pumping more air into the soccer ball

putting the baseball in a plastic case

Explanation:

The gravitational force between the baseball and the soccer ball will increase if the moving balls are closer together, pumping more air into the soccer ball and putting the baseball in a plastic case.

According to Newton's law of universal gravitation "the force between two masses is proportional to the magnitude of their mass and inversely proportional the square of the distances between them". It is mathematically expressed as:

Fgravity = G $\frac{M_{1} M_{2} }{r^{2} }$

Where G is a constant called the universal gravitation constant.

M1 is the mass of particle 1

M2 is the mass of particle 2

r is the distance between them.

The force of gravity increases as their masses increase and also as the distance between the bodies reduce.

From the options:

Moving the balls closer together distance reducing

Pumping more air into the soccer ball mass increasing

Putting the baseball in a plastic case mass increasing

Learn more:

Universal Gravitation brainly.com/question/1724648

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2 years ago

In the context of the loop and junction rules for electrical circuits, a junction is: Group of answer choices where a wire is be

vitfil [10]

Answer:

In the context of the loop and junction rules for electrical circuits, a junction is where three or more wires are joined.

Explanation:

A point where at least three circuit paths meet i.e wires, is referred to as a junction.

Kirchhoff’s circuit laws are two(2) equations first published by Gustav Kirchhoff in 1845. Fundamentally, they address conservation of energy and charge in the context of electrical circuits. One of the laws known as Kirchoff's Current Law deals with the principle of application of conserved energy in electrical circuits. Kirchoff's Current Law states that the sum of all currents entering a junction must equal the sum of all currents leaving the junction.

This basically means, the algebraic sum of currents in a network of conductors(wires) meeting at a point is equal to zero

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3 years ago

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Does potential energy increase with temperature?

kogti [31]

-- The potential energy of a 12-lb bowling ball up on the shelf
doesn't have anything to do with the temperature of the ball or
the shelf.

-- The potential energy of a jar full of gas does depend on the
temperature of the gas. The warmer it is, the greater its pressure
is, and the more work it can do if you let it out through a little hole
in the jar. If it gets hot enough, it'll have enough potential energy
to blow the jar to smithereens.

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2 years ago

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