The horizontal rows on the periodic table are called

Answer:

400N

Explanation:

[tex]F=k(l_1-l_2)[/tex]

[tex]10=5k[/tex]

[tex]k=2[/tex]

[tex]15=2*(30-l_2)[/tex]

[tex]15=60-2l_2[/tex]

[tex]2l_2=45[/tex]

[tex]l_2=22,5cm[/tex]

Answer:

Galileo Galilei developed the first ever telescope

Answer:

Gamma radiation

Explanation:

Gamma radiation is a decay emission of pure energy.

Answer:

It must return at the same velocity with which it was thrown or else there would be a preferred direction of motion leading to perpetual motion.

a = (v2 - v1) / t = (v2 - 0) / 2 = v2 / 2    for a falling object

v2 = 2 a = 2 sec * 9.8 m/sec^2 = 19.6 m/s

You can check with

H = V0 t - 1/2 g t^2      (V0 and g are in different directions)

H = 0

V0 = 1/2 g * 4 = 19.6 m/s

Answer:

the correct answer will be 6.82 %that is 7%

p(1.27)-q(0.83) =x=0.44

0.02+0.01 =0.03 (maximum uncertainty)

percentage uncertainty =0.03/0.44×100 %

=6.82%

=7%

Explanation: it was d on my end

Answer:

from spectral lines astronomers Can determine

The answer to the question are bulleted below

1. Nuclear fusion of hydrogen into helium occurs in the core.

2. Energy moves through the Sun's Convection Zone by means of the rising of hot gas and falling of cooler gas.

3. Nearly all the visible light we see from the Sun is emitted from the Photosphere.

4. Most of the Sun's ultraviolet light is emitted from the narrow layer called the Chromosphere where temperature increases with altitude.

5. We can see the Sun's Corona most easily during total solar eclipses.

6. The Radiation Zone is the layer of the Sun between its core and convection zone.

see more here  https://brainly.com/question/18767319

Answer:

Answer is 40m

Explanation:

The explanation is attached in the image below.

Answer: Is three times the height of Mt. Everest

Explanation:

Using the process of elimination we can rule out “D” Because its a volcano, C because it says we have visited mars 44 times not the volcano, B because in the passage is literally says “3 times the size of Mt. Everest”.

Answer:

"ac = v2/r"

This is the formula and is the main step to learning about how to figure out the centripetal acceleration and force from mass and radius.

Answer:

visible region

Explanation:

According to the procedure in section 2, in visible region the data collected on hydrogen and helium’s line spectra.

Electromagnetic spectrum are the wave which is form of energy and includes the waves such as radio waves, gamma waves, visible light waves etc.

An element’s line spectrum can include emissions at wavelengths throughout the electromagnetic spectrum including ultraviolet, visible, and infrared.

Types of electromagnetic spectrum-

The hydrogen line spectra fall between wavelength, 410 nm to 656 nm. The helium line spectra fall between wavelength, 400 nm to 781 nm.This two fall in the visible region of line spectra.

According to the procedure in section 2, in visible region the data collected on hydrogen and helium’s line spectra.

Learn more about the electromagnetic radiation here

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Answer:

metal and glass are very smooth and reflect light back more directly this is called specular reflection if you look into a lake on a wide windless day you will be able to see your reflection because of the smooth surface of the water is producing the specular reflection rather than diffuse reflection

Answer: https://www.fs.usda.gov/managing-land/urban-forests/ucf

Explanation:

if you go to this link it will give you some facts

Considering the change of units and rule of three, the number of tablets in the bottle is 2,000.

First of all, you know that each medicinal tablet has a mass of 250 mg, while the mass of all tablets is 0.5 kg. You can see that the measurements are in different units of measurement, so you must make a change of units so that they are in the same units.

So, knowing that 1 kg is equal to 1,000,000 mg, you can apply the following rule of three: if 1 kg is equal to 1,000,000 mg, 0.5 kg is equal to how many mg?

1 kg ⇒ 1,000,000 mg

0.5 kg ⇒ x mg

So: [tex]x=\frac{0.5 kgx1,000,000 mg}{1 kg}[/tex]

x= 500,000 mg

Then, you know that each medicinal tablet has a mass of 250 mg, while the mass of all tablets is 500,000 mg. Now that the values ​​are in the same units, to calculate the number of medicinal tablets you must apply the following rule of three: if 1 tablet has a mass of 250 mg, how many tablets have a mass of 500,000 mg?

[tex]number of medicinal tablets=\frac{500,000 mgx1 tablet}{250 mg}[/tex]

number of medicinal tablets= 2,000

Finally, the number of tablets in the bottle is 2,000.

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You can't see anything if time would stop:

This is in fact true...if time stops then photons will also stop and they will unable to reach your eyes, so would your metabolism and cellular activity. Thus you won't be able to see anything.

Hope this helped you- have a good day bro cya)

Answer:

You can't see anything if time stop..

Explanation:

IG

Answer:

Traveled north = 18 blocks

Traveled east = 10 blocks

Traveled south = 16 blocks

So total distance = (18+10+16) blocks = 44 blocks

as north and south are opposite

so traveled displacement from up to down is = (18-16) blocks = 2 blocks

and starting to east distance is 10 blocks

so using pythagoras theorem the displacement

= [tex]\sqrt{10^{2}+2^{2} }[/tex] blocks

= [tex]\sqrt{104}[/tex] blocks

= [tex]2\sqrt{26}[/tex] blocks

= 10.198 blocks (approx.)

ANS: distance=44 blocks, displacement=10.198 blocks (approx.)

Explanation:

Answer:

foot ball.

Explanation:

exercise is the specific method which helps one's own health both physical and mental health. Mental hygienic is purely rely on the physical health well-being. playing the football needs to run from one station or position to another positiin. in the due process, the flow of blood of the individual circulate faster than other rest days as a result of this, fats in the arteries are burnt down.Blood pressure remains constant as always. Diabetes will be free for the people who plays football because carbohydrates are also burnt down into simpler form of the substance thereby releasing the required amount of energy.

Explanation:

the object has constant velocity for 2 seconds and it get a constant accelration (2ms-2)

Answer:250J

Explanation:

160*t=1000

40* 1000/160= 250

Answer:

5

Explanation:

Formula for Mass (for this question)

[tex]mass=\frac{Force}{Acceleration}[/tex]

mass= 1000N/200[tex]m^{2}[/tex]=5

(pls do correct me if I have any mistakes it would rlly help others!)

Answer:

Surface tension is the result of water molecules pulling inward with a strong attractive force. This attractive force brings the molecules on the surface of the water close together and causes the surface of the water to be drawn toward the water molecules beneath the surface. Since there are no water molecules above the surface, there are uneven forces. This causes surface tension, allowing the coin to float on the water’s surface.

Explanation:

Brainliest pls

Answer:

50 [m/s].

Explanation:

1) formula is: V-V₀=g*t, where V₀ - final velocity (it is 0), V - required initial velocity, g≈10 [m/s²] and t - elapsed time.

2) according to the formula above:

V=g*t; ⇒ V=5*10=50 [m/s].

Answer: a tadpole is the first or second step into the evolution for a frog

Explanation: a frog starts with the egg then it becomes a tadpole for 6 to 12 weeks before it can start going out the water.

Answer:

Tadpoles are baby frogs. The tadpole looks like a frog with a tail and becomes a froglet around 12 weeks after hatching. The tadpole becomes an adult frog around 13 to 16 weeks after hatching.

Explanation:

I also attached a photo for you

Brainliest or rating please and thank you

Answer:

First you calculate the distance covered in First 3hrs then calculate the time for the remaining distance then add the total time

Answer:

7.644 feet

Explanation:

Free fall means that an object is falling freely with no forces acting upon it except gravity, a defined constant, g = -9.8 m/s2. The distance the object falls, or height, h, is 1/2 gravity x the square of the time falling.