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lilavasa [31]
3 years ago
12

Does light have mass?

Physics
2 answers:
Lapatulllka [165]3 years ago
5 0
No, light does not have mass because a photon does not way anything.  
marishachu [46]3 years ago
3 0
No lights do not have a mass
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Which element does not have the same number of electrons in its outermost shell as the other elements in its group?(1 point)
Setler79 [48]

Helium (He) does not have the same number of valence electrons as other elements in its group.

The periodic table is divided into groups with the last number of the group coinciding with the number of electrons that an element in the group has in its outermost or valence shell.

Helium is in group 18 which means that it should have the same number of valence electrons as :

  • Neon
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Yet Helium only has 2 valence electrons. We can therefore conclusively say that Helium does not have the same number of valence electrons as other elements in its group.

<em>More information is available at brainly.com/question/20944279. </em>

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3 years ago
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A wall (of thermal conductivity 0.98 W/m · ◦ C) of a building has dimensions of 3.7 m by 15 m. The average inside and outside
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Answer:

Answer:

the amount of energy flowing is 1.008x10⁹J

Explanation:

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ΔT=30-8=22°C

L=thickness=8cm=0.08m

t=time=16.9h=60840s

Replacing:

Explanation:

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2 years ago
A ladder 7.85 m long leans against the side of a building. If the ladder is inclined at an angle of 79.5° to the horizontal, wha
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3 years ago
What is the difference between current and voltage besides their units of measurement
kondor19780726 [428]
"Voltage" is the "pressure" that makes electrons want to leave where they are
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"Current" is the rate at which they all migrate in that direction.
8 0
3 years ago
Urgent need help 100 points
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Answer: The velocity with which the sand throw is 24.2 m/s.

Explanation:

Explanation:

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height, h = 75 m

final velocity, v = 0

Let the initial  velocity at the time of throw is u.

Use third equation of motion

The velocity with which the sand throw is 24.2 m/s.

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2 years ago
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