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2 years ago

12

Which statement is always true about objects which exert gravitational force on each other? A. They are a very large size. B. Th

ey exist only in outer space. C. They are a speed. D.They are a mass.

1 answer:

Keith_Richards [23]2 years ago

7 0

Answer:

The answer is D. They are a mass.

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A charged cloud system produces an electric field in the air near earth's surface. a particle of charge -2.0 × 10-9 c is acted o

defon

Part a)

Magnitude of electric field is given by force per unit charge

$E = \frac{F}{q}$

$E = \frac{4.3 * 10^{-6}}{2 * 10^{-9}}$

$E = 2150 N/C$

Part b)

Electrostatic force on the proton is given as

F = qE

$F = 1.6 * 10^{-19} * 2150$

$F = 3.44 * 10^{-16} N$

PART C)

Gravitational force is given by

$F_g = mg$

$F_g = 1.6 * 10^{-27}*9.8$

$F_g = 1.57 * 10^{-26} N$

PART d)

Ratio of electric force to weight

$\frac{F_e}{F_g} = \frac{3.44 * 10^{-16}}{1.57*10^{-26}}$

$\frac{F_e}{F_g} = 2.2 * 10^{10}$

7 0

3 years ago

Explain what happens to light when it is refracted at the surface of water.

stepan [7]

Light will make the object appear “broken” or in an irregular shape.

Refraction is the change in direction of waves.

6 0

3 years ago

Read 2 more answers

Why cable color codes are important ? what if we use three phase cables without color

Degger [83]

Answer:

Cable color codes are very important for example, If something is not wired properly, it can result in injuries, deaths, fires, and many other problems. This is why there are well-established wire color codes to ensure those working with an around this type of equipment can ensure everything is wired safely and effectively. If we used three phase cables without color code, this can lead too incorrect things that might be a hazard too get not fix and learning new color codes would be hard therefore we should stick too the same color codes for cables and it saves the hassle for needing too check every cable cord color then the original one signed too it.

4 0

2 years ago

What is surface tension? How does surface tension result from intermolecular forces? How is it related to the strength of interm

Bond [772]

Answer:

Surface tension is the tendency of liquid surfaces to shrink into the minimum surface area possible.

Surface tension is caused by effects of intermolecular forces at liquid interface.

Surface tension increases as intermolecular forces increases.

Explanation:

Surface tension is the tendency of liquid surfaces to shrink into the minimum surface area possible. It can also be seen as the energy required to increase the surface of a liquid by a unit amount.

Surface tension is caused by the mediating effects of intermolecular forces at the liquid interfaces. Example in water, surface tension is caused by the mediating effect of the force between hydrogen and oxygen molecules. Liquids tends to reduce their surface area because of inward attarction of the liquid molecules.

Surface tension increases as intermolecular forces increases. Also, surface tension decreases as intermolecular forces decreases.

3 0

3 years ago

Suppose that light from a laser with wavelength 633 nm is incident on a thin slit of width 0.500 mm. If the diffracted light pro

coldgirl [10]

Explanation:

It is given that,

Wavelength, $\lambda=633\ nm=633\times 10^{-9}\ m$

Slit width, $a=0.5\ mm=0.0005\ m$

Order, m = 2

If the diffracted light projects onto a screen at distance 1.50 m, L = 1.5 m

For the diffraction of light,

$y=\dfrac{m\lambda L}{a}$

$y=\dfrac{2\times 633\times 10^{-9}\times 1.5}{0.0005}$

y = 0.0037 m

So, the distance from the center of the diffraction pattern to the dark band is 0.0037 meters. Hence, this is the required solution.

3 0

3 years ago