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brilliants [131]
2 years ago
13

A positive force on the balance indicates a downward force on the silver sphere while a negative force on the balance indicates

an upward force on the silver sphere.With that in mind, do the two spheres have like charges or opposite charges? Give your answer as a CER.
Physics
1 answer:
anastassius [24]2 years ago
7 0

The two spheres have opposite charges.

<h3 /><h3 /><h3>What are types charge?</h3>
  • A charge can be negatively charged or positively charged.
  • When two charges have opposite signs, that is positive and negative signs, the two charges will attract each other.
  • When the two charges have the same sign, it causes repulsion.

When a positive charge points downwards ↓ and the negative charge points upwards ↑, this causes attraction and shows that the two charges are different.

Thus, we can conclude that the two spheres have opposite charges.

Learn more about attraction and repulsion of charges here: brainly.com/question/2396080

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Answer:

f_o=860\ Hz

Explanation:

Given:

  • original frequency of sound wave, f=860\ Hz
  • speed of the sound source, v_s=20\ m.s^{-1}
  • original speed of sound wave from the source, s=343\ m.s^{-1}

<u>According to the Doppler's effect:</u>

\frac{f_s}{f_o} =\frac{s+v_s}{s-v_o}

The sound is reflected from the wall and the source is moving towards the wall and observer is also riding the same source.

The velocity of the observer, v_o=-20\ m.s^{-1}

\frac{860}{f_o} =\frac{s+20}{s-(-20)}

f_o=860\ Hz

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Which represents a correct match between ideas related to the formation of the universe? Select the two correct answers. (1 poin
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The frequency of the musical note F#3 is 1.85x102 hertz. What is its period?
g100num [7]

The period of the musical note is \text { 5. } 4 \times 10^{-3} seconds.

Answer: Option A

<u>Explanation:</u>

The frequency is defined as the number of oscillations or a complete cycle of wave occurred in a given time interval. So the frequency is inversely proportional to the time period. Thus the mathematical representation of frequency with time period is

               \text {Frequency}=\frac{1}{\text {Time period }}

As the frequency is given as 1.85 \times 10^{2} \mathrm{Hz}, the time period can be found as

               \text { Time period }=\frac{1}{\text { Frequency }}

Thus,

               \text { Time period }=\frac{1}{1.85 \times 10^{2}}=5.4 \times 10^{-3} \mathrm{s}

Thus the time period for the frequency of the musical note is \text { 5. } 4 \times 10^{-3} seconds.

5 0
3 years ago
Before beginning an experiment Mrs. Wilson warns her science class not to drop the bar magnets on the floor what is the most lik
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Answer:

They could lose their magnetism if they are dropped too hard or banging against something (the ground)

Explanation:

the domains may bump out of alignment. hope this helps ! :)

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