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wlad13 [49]
4 years ago
11

Latent heat of fusion definition and explanation

Physics
1 answer:
pogonyaev4 years ago
5 0

Answer:

The enthalpy of fusion of a substance, also known as heat of fusion, is the change in its enthalpy resulting from providing energy, typically heat, to a specific quantity of the substance to change its state from a solid to a liquid, at constant pressure. 

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The system of checks and balances is BEST illustrated by the power of __________. A) Congress to impeach one of its members. B)
Alona [7]

Answer: B) the President to veto a bill passed by Congress

Explanation: The principle of Checks and balances in government may be explained as an idea of power segmentation which allows each arm of a democratic government including the executive, the legislative and the judiciary to have a certain amount of power and control over policies, laws and reforms of a country. This idea is especially useful in checking the excesses of a certain arm of government and ensures that other arms are able to come in when a certain arm of government step beyond it's bounds.

The president could veto a bill passed by Congress, because, bills are made and passed by the legislative or congress, however, the executive arm has the power to enforce or veto the bills.

6 0
3 years ago
Which of the following diagrams best represents the gravitational force W. the frictional force f, and the normal force N that a
mojhsa [17]

It's D.

Weight always points downward.

The normal force always points perpendicular to the surface.

Friction opposes motion, so it points in the direction opposite the direction in which the block is moving.

3 0
3 years ago
The diagram below shows eight different positions of the moon around Earth.
KATRIN_1 [288]

Answer:

6 and 8

Explanation:

The different positions of the moon, as seen from Earth, reflect how much light is being reflected off the moon from the sun.

Position 1 indicates the 3rd Quarter.

Position 2 indicates the Waning Gibbous.

Position 3 indicates the Full Moon.

Position 4 indicates the Waxing Gibbous.

Position 5 indicates the 1st Quarter.

Position 6 indicates the Waxing Crescent.

Position 7 indicates the New Moon.

Position 8 indicates the Waning Crescent.

You would read the diagram counterclockwise, with positions 7 to 3 as the moon increases light and positions 3 to 7 as the moon decreases light.

Therefore, we see that our 2 choices where we have a crescent is positions 6 and 8.

6 0
4 years ago
The force of gravity follows an inverse square law, meaning that the strength of the force declines with the square of the dista
pickupchik [31]
The strength of gravity solely depends then on the product of their masses
from
F~Mm
5 0
4 years ago
An object of 4 cm length is placed at a distance of 18 cm in front of a convex mirror of radius of curvature 30 cm. Find the pos
erica [24]

Answer:

The position is 8.18cm from the mirror.

Nature is b=virtual

Size is 1.82cm

Explanation:

Note that for a convex mirror, the image distance and the focal length are negative;

Given

Object height H0 = 4cm

object distance u = 18cm

Radius of curvature R = 30cm

Since f = R/2

f = 30/2

f = -15cm

Recall that:

\frac{1}{f} =\frac{1}{u}+ \frac{1}{v}\\\frac{1}{-15}=\frac{1}{18}+\frac{1}{v}    \\\frac{1}{v} =\frac{1}{-15} -\frac{1}{18}\\ \frac{1}{v} = \frac{-18-15}{270}\\\frac{1}{v} = \frac{-33}{270}\\v=\frac{-270}{33}\\v=-8.18cm

Since the image distance is negative, this shows that the image is a virtual image.

To get the size:

\frac{H_1}{H_0}=\frac{v}{u}\\\frac{H_1}{4}=\frac{8.18}{18}\\18H_i=32.72\\H_i=\frac{32.72}{18}\\H_i= 1.82cm

3 0
3 years ago
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