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Colt1911 [192]
3 years ago
6

What do all of the elements in group 13 have in common?

Physics
2 answers:
Neko [114]3 years ago
8 0
Each one of the elements in group 13 has three electrons in the outer shell of their nuclear structure
Dmitry_Shevchenko [17]3 years ago
7 0
They have three electrons in the outer shell
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a sound wave travels at 330 m/sec and has a wavelenght of 2meters. calcuate the frequency and period
Sergio039 [100]

The frequency of any wave is  (speed) / (wavelength).

 Frequency = (330 m/s) / (2m)  =  165 per second = <em>165 Hz</em>.

Period = 1 / frequency  =  1 / (165 per second) = <em>0.0061 second </em>


7 0
3 years ago
When the computer you are working on uses energy it also produces waste energy. What type of energy is this waste energy?
mihalych1998 [28]
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3 years ago
This is for physical science i don't understand (please help) i need an answer by 11:40
coldgirl [10]

Answer: 1.4mi/hr²

Explanation:

Blank 1: We know that acceleration is the change in velocity/change in time

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8 0
2 years ago
Jonah is trying to move his 22-kg desk by pushing on it with a force of 130 N, but his brother is leaning on it with a downward
Dafna11 [192]

Answer:

0.54

Explanation:

Draw a free body diagram.  There are 5 forces on the desk:

Weight force mg pulling down

Applied force 24 N pushing down

Normal force Fn pushing up

Applied force 130 N pushing right

Friction force Fnμ pushing left

Sum of the forces in the y direction:

∑F = ma

Fn − mg − 24 = 0

Fn = mg + 24

Fn = (22)(9.8) + 24

Fn = 240

Sum of the forces in the x direction:

∑F = ma

130 − Fnμ = 0

Fnμ = 130

μ = 130 / Fn

μ = 130 / 240

μ = 0.54

6 0
3 years ago
Question1 of 10
kakasveta [241]
I believe the answer is B because they are interfering and combining into something bigger and brighter
8 0
3 years ago
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