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2 years ago

Each molecule of iron oxide is made up of how many iron stone

1 answer:

6 0

<span>The cosmetics industry uses the compound to create various pigments in make-up as well. Most oxide forms are non-toxic, water repellent, and do not run or bleed, making them an ideal additive to products like mascara, liquid and powder foundation, and eye shadow. Oxides can also be found in certain types of health products such as talcum powder, facial cream, and body cream. Some sunblock products contain it as well. Its structure is often thought to help block the sun’s harmful ultraviolet rays from damaging human skin.</span>

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Imagine that the ball on the left is given a nonzero initial velocity in the horizontal direction, while the ball on the right c

masya89 [10]

Answer:

vₓ = xg/2y

Explanation:

In this question, let us find the time it takes for the ball on the right that has zero initial velocity to reach the ground.

By newton equation of motion we know that

y = v₀ t - ½ g t²

t = 2y / g

This is the time it takes for the ball on the right to reach the ground; at this time the ball on the left travels a distance

vₓ = x/t

vₓ = xg/2y

Where we assume that x and y are known.

7 0

3 years ago

You are wearing earbuds or headphones to listen to your music but your family members can hear it as well. They tell you that it

allsm [11]

If it’s loud enough for your family to hear it, it’s best you turn it down. It could cause permanent damage to your ear drums if it’s loud enough and you could start to lose your hearing. So if your family were to tell you to turn it down, you should probably just turn it down!

5 0

3 years ago

1. Compare the speed that light waves travel in air to the speed that sound waves travel in the air. How many times faster do li

Vladimir79 [104]

Answer:

895522 times faster.

Explanation:

From the question given above, the following data were obtained:

Speed of sound in air (v) = 335 m/s

Speed of light in air (c) = 3×10⁸ m/s

How many times faster =.?

To obtain how many times faster light travels in air than sound, do the following

c : v => 3×10⁸ : 335

c/v = 3×10⁸ / 335

c/v = 895522

Cross multiply

c = 895522 × v

From the illustrations made above, we can see that the speed of the light in air (c) is 895522 times the speed of sound in air.

Thus, light travels 895522 times faster than sound in air.

6 0

2 years ago

Two parallel square metal plates that are 1.6 cm apart and 24 cm on each side carry equal but opposite charges uniformly spread

Fiesta28 [93]

The amount of extra electrons present on the negative surface is

57.2 x $10^{10}$ .

Distance =1.6 cm

Side = 24 cm

Electric field = 18000 N/C

Calculating the capacitance in the metal plates is necessary.

Using the capacitance formula

$C=\frac{e_{0}A }{d}$

Putting the value

C = 8.85 x $10^{-12}$ x (24 x $10^{-2}$ $)^{2}$ /1.6 x $10^{-2}$

C = 0.318 x $10^{-10}$ F

<h3>Calculation of potential</h3>

V = Ed

V = 18000 x 1.6 x $10^{-2}$ V

V = 288 V

<h3>Calculation of charge</h3>

Q = CV

Q = 0.318 x $10^{-10}$ x 288

Q = 91.54 x $10^{-10}$ C

Charge on the both the plates

Q = +91.54 x $10^{-10}$

Q = - 91.54 x $10^{-10}$

Calculation of excess electrons on the negative surface:

n = q/e

n = 91.54 x $10^{-10}$ / 1.6 x $10^{-19}$

n = 57.2 x $10^{10}$ electrons

Hence, the number of excess electrons on the negative surface is

57.2 x $10^{10}$ .

Learn more about capacitance here:

brainly.com/question/14746225

#SPJ4

8 0

8 months ago

Energy of fossil fuel is also derived from solar energy why

zzz [600]

Explanation:

All the energy in oil, gas, and coal originally came from the sun captured through photosynthesis. In the same way that we burn wood to release energy that trees capture from the sun, we burn fossil fuels to release the energy that ancient plants captured from the sun.

8 0

2 years ago