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3 years ago

Let's discuss

Physics

1 answer:

vichka [17]3 years ago

3 0

Explanation:

This is not a new theory, it states that the entire universe will run out of dark matter that keeps the universe inflating,the entire universe succumbs to gravity and merges into a point and then big bang... you know the rest.

P.s I'm also in eighth grade, but don't think that my explanation is dumb or something..it is true fact

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When beavers inhabit an area, they cut down trees and construct beaver dams, which slow the flow of rivers or streams. Which of

Airida [17]

Answer: H

Explanation:

When beavers dam a stream they slow the movement of water. Behind the beaver dam, a pond of still water is formed. This pond is then colonized by animals and plants that typically live in lakes rather than streams.

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3 years ago

Which form of energy is due to an object's position or location

gavmur [86]

Answer:

Potential energy

Explanation:

Potential energy is the energy stored within an object, due to the object's position, arrangement or state. Potential energy is one of the two main forms of energy, along with kinetic energy.

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3 years ago

Read 2 more answers

2. Three charged particles are placed at the corners of an equilateral triangle of side 1.20 m. The charges are +7.0μC, -8.0 μC

Scorpion4ik [409]

Answer:

0.53 N, 25.6°

Explanation:

side of triangle, a = 1.2 m

q = 7 μC

q1 = - 8 μC

q2 = - 6 μC

Let F1 be the force between q and q1

By using the coulomb's law

$F_{1}=\frac{Kq_{1}q}{a^{2}}$

$F_{1}=\frac{9\times 10^{9}\times 7\times 10^{-6}\times 8\times 10^{-6}}{1.2^{2}}$

F1 = 0.35 N

Let F2 be the force between q and q2

By using the coulomb's law

$F_{2}=\frac{Kq_{2}q}{a^{2}}$

$F_{2}=\frac{9\times 10^{9}\times 7\times 10^{-6}\times 6\times 10^{-6}}{1.2^{2}}$

F2 = 0.26 N

Write the forces in the vector form

$\overrightarrow{F_{1}}=0.35\widehat{i}$

$\overrightarrow{F_{2}}=0.26\left ( Cos60 \widehat{i}+Sin60\widehat{j}\right )$

$\overrightarrow{F_{2}}=0.13 \widehat{i}+0.23\widehat{j}$

Net force

$\overrightarrow{F}=\overrightarrow{F_{1}}+\overrightarrow{F_{2}}$

$\overrightarrow{F}=0.48 \widehat{i}+0.23\widehat{j}$

Magnitude of the force

$F=\sqrt{0.48^{2}+0.23^{2}}$

F = 0.53 N

Direction of force with x axis

$tan\theta =\frac{0.23}{0.48}$

θ = 25.6°

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3 years ago

Please help wave number 3

ELEN [110]

Hello!

In Wave 3, there are 40 waves in the wave train. To find the Wavelength of the wave, you'll need to use a ruler to find the measure of the wave in centimeters (I can't really measure the wave because I would be measuring a picture and I wouldn't know if I was accurately measuring the wave), but I would estimate it to be about 2cm long. For the amplitude, I am not certain on what the amplitude would be. I could only manage to find the amount of wave sand the estimated length.

I hope this helps!

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3 years ago

Conversion: The weather report this morning stated there is a thick fog in

tangare [24]

Answer: 0.1524 km

Explanation:

We have to convert $500 ft$ to kilometers, and we can do it knowing $1 ft=0.30 48 m$ and $1 km=1000 m$ :