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3 years ago

A good refrigerant must have a high boiling point. Question 5 options: True False

Physics

2 answers:

Liono4ka [1.6K]3 years ago

5 0

Answer:

true a good refrigiant needs a high boiling point

NeTakaya3 years ago

3 0

A good refrigerant must have a high boiling point is FALSE.

<u>Explanation: </u>

It has the low boiling point. It should have the ability to turn into gas in absorption of heat.

If the refrigerant need to be good and ideal must have the boiling point low and freezing point also low. The low boiling point makes the refrigerant to be good as it needs to boil when the temperature crosses the limit.

It has the high critical pressure and temperature in order to avoid the large power requirements of the compressor in the refrigerator.

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Degrees of loudness and softness in music are called.

andrey2020 [161]

Degrees of loudness and softness in music are called dynamics. I don’t really have an explanation for this, that’s just what they’re called. I know because I’m a violinist and learned it when I first started playing.

7 0

3 years ago

Type the correct answer in each box. Round your answers to the nearest hundredth.

sergey [27]

Hi there!

$\large\boxed{PE = 7.35 J, \text{ }v \approx 3.13 m/s}$

To find the potential energy of the ball at B, we can use the equation:

PE = mgh

Plug the given gravity, mass, and height:

PE = (1.5)(0.5)(9.8) = 7.35 J

At A, all of this potential energy is changed to kinetic energy, so we can use the following equation:

v = √2KE/m

Plug in the solved for energy and mass:

v = √2(7.35)/1.5

Solve:

v ≈ 3.13 m/s

7 0

3 years ago

The subfield of anthropology that describes, analyzes, interprets, and explains social and cultural similarities and differences

Makovka662 [10]

Answer:

cultural

Explanation:

Cultural anthropology studies the characteristics of the behavior learned in human societies, that is, science of human culture. In general, it is the science that studies the origin, development, structure, characteristics and variations of human culture in both past and present societies. Ethnography, ethnology, archeology, linguistics and physical anthropology are the disciplines on which cultural anthropology is founded.

6 0

3 years ago

A box is pushed toward the right across a classroom floor.The force of friction on the box is directed toward the

noname [10]

Left. Opposite of the direction the box is pushed.

4 0

3 years ago

A man walks 400 m in the direction 45° north of east. Represent this vector graphically by

Marrrta [24]

Answer:

Explanation:

Coordinate system is one that describe the location of an object in a given plane. It implies the use of axes (coordinates) and points.

Given that the man in the question walks 400 m due north of east. The cardinal points can be used in this case, with the north and east cardinals as the required axis.

scale = $\frac{length on drawing}{original length}$

= $\frac{10}{400}$

= $\frac{1}{40}$

scale = 1:40

This is a reduced scale which implies that 1 cm on the drawing is equal to 40 m on the original length.

The man's direction is $45^{o}$ north of east.

The graphical drawing of the vector is herewith attached to this answer.

5 0

3 years ago