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andrew11 [14]
3 years ago
13

Isotopes have variable numbers of electrons. a. True b. False

Physics
1 answer:
allsm [11]3 years ago
4 0
Isotopes have the same number of valence electrons
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A 9.0 V battery is connected across two resistors in series. If the resistors have resistances of and what is the voltage drop a
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the answer to the question is known as D

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People cannot see certain types of light waves because:
enot [183]

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Light comes in different colors like radio, ultra violet, gamma-ray, etc, and they are invisible to the bare eye

Explanation:

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2 years ago
If a mass of .343 kg moves down a 5m ramp in 5.8 seconds, what is the velocity and KE developed by the moving mass
Soloha48 [4]

Velocity 0.86m/s

0.13J

Explanation:

Given parameters:

Mass = 0.343kg

distance = 5m

time taken = 5.8s

Unknown:

Velocity of mass = ?

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Solution:

Velocity is the rate of change of displacement with time. It is a vector quantity that shows magnitude and direction.

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  Velocity  = \frac{5}{5.8 } = 0.86m/s

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m is the mass

v is the velocity

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learn more:

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7 0
3 years ago
What is the Electromagnetic Spectrum? in your own words
Inessa05 [86]
The electromagnetic spectrum is the system of frequencies that show electromagnetic radiation, respective wavelengths, and photon energies. Some examples of frequencies found on the electromagnetic spectrum are radio waves, microwaves, infrared, optical, ultraviolet, X-rays, and gamma-rays.
5 0
3 years ago
A girl runs 40m due south in 40 seconds an d then 20m due north in 10 secondsCalculate.
m_a_m_a [10]

Answer:

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Average velocity = 0.4 m/s

Explanation:

Average speed = total distance/total time

Average speed = (40 + 20)/(40 + 10)

Average speed = 60/50

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Average velocity = displacement/time

Now, she ran 40 m south and ran 20 m back north which is in the direction of where she began the journey.

Thus;

Displacement = 40 - 20 = 20 m

Average velocity = 20/50 = 0.4 m/s

3 0
3 years ago
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