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4 years ago

State the difference between sensible heat and latent heat

Physics

1 answer:

Anna11 [10]4 years ago

6 0

<u>Latent hea</u>t is related to changes in phase between liquids ,gases and solids.

<u>Sensible heat</u> is related to changes in temperature of a gas or object with no change in phase.

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A negative slope on the velocity vs. time graph indicates that the object is not

Svetlanka [38]

Answer: False, I think

Explanation:

Well it depends. Its hard to say without a function of the graph. Given a velocity graph, the first derivative is the acceleration.

Negative slope on a velocity graph means you are going in the negative direction. And over time, your velocity per unit of time is also decreasing. That means we are accelerating in the negative direction

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3 years ago

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Which of the following does not represent a question that can be answered by science?a. How much energy is released in a given n

Nookie1986 [14]

Answer:

Explanation:

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3 years ago

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How is momentum conserved is a Newton's cradle when one steel ball hits the other

Vikentia [17]

Answer:

Newton's Cradle experiment perfectly demonstrates the law of conservation of momentum which states that in a closed system, momentum before the collision is equal to momentum after the collision of the system.

As the first ball swings in the air, it gains momentum. When it strikes the second ball, it loses momentum and second ball gains equal amount of momentum. The second ball transfers the momentum to third, then fourth and till the last. The last ball when gains the same momentum swings up in the air. This continues. This experiment is done in drag free condition. This means there is no loss of momentum or opposing forces present.

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3 years ago

The increase in potential that a transformer produces is due to: the constant magnetic field in the primary the difference in th

notsponge [240]

Answer: the difference in the number of turns in each coil

Explanation:

A transformer is a device which is used transfer electrical energy from one circuit to another. It uses coils - primary and secondary having different turns. The current passes through the primary coil which induces emf in the secondary coil. The increase in potential depends on the number of turns in the coil.

$\frac{V_{out}}{V_{in}}=\frac{N_s}{N_p}$

where V is the voltage and N is the number of turns.

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3 years ago

49W

Nikolay [14]

Answer:

Explanation:

The magnitude of the electrostatic force between two charged particles is given by

$F=\frac{kq_1 q_2}{r^2}$

where

k is the Coulomb's constant

q1, q2 are the charges of the two particles

r is the separation between the particles

In this problem, the initial force between the particles is F.

Later, the distance between the two particles is increased by four, so

r' = 4r

So, the new force between the particles will be

$F'=\frac{kq_1 q_2}{(4r)^2}=\frac{kq_1 q_2}{16r^2}=\frac{1}{16}F$

So, the new force decreases by a factor of 16.

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3 years ago