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nikitadnepr [17]
3 years ago
11

How many stars can be seen without a telescope on earth

Physics
1 answer:
belka [17]3 years ago
5 0

There are only about 5,000 stars visible to the naked, average, human eye, . And, because the Earth itself gets in the way, you can only see about a half of those from where you stand.

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A uniform electric field exists everywhere in the x, y plane. This electric field has a magnitude of 4500 N/C and is directed in
Anton [14]

Answer with Explanation:

We are given that

E=4500 N/C

q=-5.5\times 10^{-9} C

a.x=-0.2 m

E'=\frac{Kq}{r^2}=\frac{9\times 10^9\times 5.5\times 10^{-9}}{(0.2)^2}=1237.5 N

Where k=9\times 10^9

Net electric field=E+E'=4500+1237.5=5737.5 N/C

b.x=0.20 m

Net electric field=E-E'=4500-1237.5=3262.5 N/C

c.y=0.20 m

E=1237.5 N/C

Net electric field=\sqrt{E^2+E'^2}=\sqrt{(4500)^2+(1237.5)^2}=4667.05 N/C

7 0
3 years ago
Which of the following is an engineering solution
Alona [7]
By "solution" it means a course of action that, once carried out, brings about some desired state of affairs. The use of engineer in this context is as a verb meaning "to arrange or bring about through skillful, artful contrivance."
5 0
4 years ago
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A lava lamp is a decorative item found in some homes. The lamp portion contains a waxy substance in a liquid medium. When the la
dangina [55]

Answer:

Conduction, convection, and radiation

Explanation:

Conduction is the process in which energy is transferred from a hot body to a cooler body. Convection is a process by which heat is transferred as a result of the movement of heated fluid in the form of air or water. Radiation refers to the transmission of energy through a material medium.

Based on the information provided, a lava lamp could be used to provide an example of conduction, convection, and radiation.

7 0
3 years ago
What is latent heat? Group of answer choices Energy released when water evaporates. Energy hidden in water vapor in the air. Ene
Andrews [41]

Answer:

Energy absorbed or hidden when water evaporates

Explanation:

The heat that is required to make a phase change is known as latent heat.

A phase change occurs when matter changes state. For example from solid to liquid, from liquid to gas, among others.

When changing from liquid to gas (for example when water evaporates), the heat necessary for this to happen is called latent heat of vaporization. The word latent means hidden, because a change in temperature is not perceived during the phase change, even when heat is being added, thus it is said that the heat is hidden or latent.

So the answer is:

  • Energy absorbed or hidden when water evaporates.

*Another type of latent heat is the latent heat of fusion, which is when a solid becomes liquid.

7 0
4 years ago
Help Quick!!!!
jarptica [38.1K]
I’m unsure of the answer, but it is not b.
8 0
3 years ago
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