2 years ago

The atomic number of magnesium is 12. This means that its nucleus must contain

Physics

1 answer:

nasty-shy [4]2 years ago

5 0

12 protons in the nucleus

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A violin string E vibrates faster then another violin string G when bowed. Which string produced a sound with higher frequency?

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Violin string E

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2 years ago

1. Two planes are leaving from the same runway at the same time. One plane is going South while the other plane is going North.

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Answer:.

Explanation:

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3 years ago

Pls hurry!! which organisms have no consumers to feed on them?

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Explanation:

All living organisms metabolize. That is the definition of life. So jr answer is no animal or organism that does not consume food.

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3 years ago

Matt and Anna Killian are frequent fliers on Fast-n-Go Airlines. They often fly between two cities that are a distance of 1575

marin [14]

Answer:

Speed of wind = 50mi/hr, Speed of plane in still air = 400mi/hr

Explanation:

Let the speed of the wind = Vw,

Speed of the plane in still air = Vsa,

The first trip the average speed of the plane = 1575mi/4.5hours = 350mi/hr

The coming trip the wind behind = 1575mi/3.5hrs = 450

Write the motion in equation form

First trip ( the plane flew into the wind)

Vaverage = Vsa - Vw

350 = Vsa - Vw

Second trip the wind was behind

450 = Vsa +Vw

Adding the two equation

800 = 2Vas

Vas = 800/2 = 400mi/hr

Substitute for Vas into equation 1

350mi/hr = 400mi/hr - Vw

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6 0

2 years ago

If the index of refraction for a certain glass is 1.5, and the angle of refraction is 15 degrees for a ray of light

LiRa [457]

Answer:

$\theta_i = 23^o$

Explanation:

The refractive index of a medium is given by the following formula:

$\eta = \frac{Sin\theta_i}{Sin\theta_r}$

where,

η = refractive index = 1.5

$\theta_i$ = angle of incidence = ?

$\theta_r$ = angle of refraction = 15°

Therefore,

$1.5 = \frac{Sin\theta_i}{Sin15^o}\\\\Sin\theta_i=(1.5)Sin15^o\\\\\theta_i = Sin^{-1}(0.388)\\\\$

$\theta_i = 23^o$

4 0

3 years ago