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nikklg [1K]
3 years ago
14

Na + Cl2 → 2NaCl

Physics
1 answer:
Dmitrij [34]3 years ago
8 0

Answer:

what do u want to ask ????

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How long did it take for a message sent from earth to reach the first astronauts?
Sergeu [11.5K]

Time taken for a message to sent from earth to reach the first astronauts is  140 second.

It takes about three days for a spacecraft to reach the Moon. in the course of that time a spacecraft travels at the least 240,000 miles 386,400 km that is the space between Earth and the Moon. The specific distance depends at the specific path selected.

The distance from earth to moon is approximately3.84*108m

So, the distance from earth to the astronauts is3.84*108m - 10500*103m =3.735*108m

The speed of light c = 2.99792458*108m/s

So, divided the distance from earth to astronauts by the speed off light,

3.735*108m/2.99792458*108m/s ˜1.25seconds

Divided the Pluto-earth distance by speed of light:

Hence, 4.2*1010m/2.99792458*108m/s = 140seconds

Learn more about astronauts here:-brainly.com/question/24496270

#SPJ4

8 0
1 year ago
BEST ANSWER GETS BRAINLIEST!
wel

Answer:

Distance = 16.9 m

Explanation:

We are given;

Power; P = 70 W

Intensity; I = 0.0195 W/m²

Now, for a spherical sound wave, the intensity in the radial direction is expressed as a function of distance r from the center of the sphere and is given by the expression;

I = Power/Unit area = P/(4πr²)

where;

P is the sound power

r is the distance.

Thus;

Making r the subject, we have;

r² = P/4πI

r = √(P/4πI)

r = √(70/(4π*0.0195))

r = √285.6627

r = 16.9 m

8 0
3 years ago
Use the following terms in the same sentence: proton, neutron, and isotope.
Julli [10]
All atoms of the same element must have the same number if protons, however the number of neutrons can vary, giving different isotopes of the element.

I'm not quite sure what you were looking for but I hope that this helps.
4 0
3 years ago
In a lecture demonstration, a 3.0-m-long vertical string with ten bolts tied to it at equal intervals is dropped from the ceilin
sleet_krkn [62]
<span>First of all, the bolts wont hit the ground at equal time intervals because each bolt is constantly increasing. Therefore, the top will have different velocity with the bottom bolt at all times. this means that the bolts will speed up more as they are higher which will make the interval time shorter. therefore, the time will decrease</span>
8 0
4 years ago
A good conductor of electricity will also be a good conductor of heat because in both electricity and heat the conduction is via
almond37 [142]

Answer:Free-moving Electrons

Explanation:

In metals which are good conductor of heat and electricity metals are free to move.This facilitate the conduction of heat and electricity through them.In both case delocalised  electrons is responsible for conduction as they are not firmly attach to particular atom and are free to move.

Heat conduction is due to vibration of ions in the lattice, at heated end ions vibration is much more as compared to cold end and this vibration passed on to heat the metal.

3 0
3 years ago
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