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3 years ago

Which describes one event that causes an eclipse?

Physics

1 answer:

Burka [1]3 years ago

3 0

Answer:

Earths shadow covering the moon would create a lunar eclipse.

Explanation:

because i just know

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A lens of focal length 15.0 cm is held 10.0 cm from a page (the object ). Find the magnification .

nevsk [136]

Answer:

Magnification, m = 3

Explanation:

It is given that,

Focal length of the lens, f = 15 cm

Object distance, u = -10 cm

Lens formula :

$\dfrac{1}{v}-\dfrac{1}{u}=\dfrac{1}{f}$

v is image distance

$\dfrac{1}{v}=\dfrac{1}{f}+\dfrac{1}{u}\\\\\dfrac{1}{v}=\dfrac{1}{15}+\dfrac{1}{(-10)}\\\\v=-30\ cm$

Magnification,

$m=\dfrac{v}{u}\\\\m=\dfrac{-30}{10}\\\\m=3$

So, the magnification of the lens is 3.

3 0

3 years ago

Why is velocity squared in kinetic energy and mass multiplied by 1/2?

maxonik [38]

Remember the definition of work done.
Work done is force(F) times displacement(x)
∴ W = F.Δx
According to Newton's 2nd law of motion,

F = ma
∴ W = ma.Δx ---- (i)
Using the kinematical equation v²-u² = 2ax,
aΔx = (v²-u²)/2

Plug this value in (i),

∴W = m[ $\frac{v^{2}-u^{2} }{2}$ ]
∴W = $\frac{mv^{2} }{2} - \frac{mu^{2} }{2}$

Which is nothing but change in kinetic energy.
That is how kinetic energy is derived

5 0

3 years ago

How did the ideas of einstein and freud contribute to a sense of uncertainty?

Ipatiy [6.2K]

Einstein's Theory of Relativity was a theory which carried about hesitation in Newton's gravity which was measured as an important part of science. Which brings one to query what we detect as being factual.
Freud's thoughts about the subliminal questions one's own mind to what we have faith in. Is a dream just a dream, or is it your subliminal trying to tell you a little? It brought about a feeling of being ignorant of what is going on in your own mind.
These and maybe other bring persons to doubt about the world about them and within themselves.

6 0

3 years ago

Electrical shock is more likely to be fatal when the path of current is through the

skad [1K]

Electrical shock is most likely to be fatal when the path of the current is through the heart.

4 0

3 years ago

What kind of conduction occurs when each section of the axolemma has to be depolarized to threshold in sequence along the entire

MArishka [77]

Answer:

Continuous conduction occurs when each section of the axolemma has to be depolarized to threshold in sequence along the entire axolemma for a current to spread down the length of the axon.

Explanation:

6 0

4 years ago