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soldier1979 [14.2K]
3 years ago
11

According to the graph, how many students received an 90 for their first semester grade?

Physics
1 answer:
SCORPION-xisa [38]3 years ago
4 0

Answer:

B

Explanation:

B

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Which formula below correctly states Coulomb's Law?
katovenus [111]
<h2>QUESTION:- Which formula below correctly states Coulomb's Law?</h2>

<h2>OPTIONS:- </h2>

A.  \:  \:  \:  \: F = kqq/r^ 2 \\B.  \:  \:  \:  \: F = kqq/r \\C.  \:  \:  \:  \: F = qq/kr^ 2 \\D.  \:  \:  \:  \: F = kr^2 /qq \\

<h2>ANSWER:- </h2>

F is directly proportional to the product of the charges

F∝qq

F is inversely proportional to the square of the distance between them

F∝ \frac{1}{ {r}^{2} }

from above 2 equation:-

we get:-

F∝ \frac{qq}{ {r}^{2} }

To remove proportionality sign we use constant for this case we r using constant k

F =  \frac{Kqq}{ {r}^{2} }

So your answer is :-

OPTION A.

F =  \frac{Kqq}{ {r}^{2} }

3 0
3 years ago
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What is the wavelength of a wave?
Sunny_sXe [5.5K]
The wavelength is the spatial period of a periodic wave—the distance over which the wave's shape repeats.
6 0
3 years ago
A battery of constant voltage is connected to a variable resistor. As the resistance of the resistor increases, what happens to
vova2212 [387]

The electric current amount will vary according to the resistance value when connected to a voltage of a power supply. If resistance is reduced, current will increase. So, if the resistance is infinite (open circuit), the current could be considered zero, or infinitesimal small, if the resistance is zero (of infinitesimal small), the current will tend to be the maximum the power supply can provide. Here is the case of the power supply capability, input resistance, capacity to hold and regulate the output voltage to a certain maximum current, etc. Normally when you short circuit (zero ohms resi

4 0
3 years ago
A baseball is thrown directly upward from ground level with a velocity of +15 m/s. What are the two times when the ball is 10 m
erastovalidia [21]

Answer:

time is 0.5660 s

and time is - 3.62431  s

Explanation:

velocity u = 15 m/s

height s = 10 m

acceleration due to gravity g =  –9.8 m/s²

to find out

time

solution

we will apply here distance equation that is

s = ut - 1/2× gt²   ...........1

here put all these value and get time t

here s is height and g is -9.8

so

s = ut - 1/2× gt²

10 = 15t - 1/2× (-9.8)t²

10 = 15t + 4.9t²

solve it we get t

t = 0.56630 and -3.62431

so time is 0.5660 s

and time is - 3.62431  s

8 0
4 years ago
which of the following is not a property of an acid? reacts with metals bitter taste reacts with carbonate turns litmus paper re
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The property that does not describe an acid is that it has a bitter taste. Acids have a sour taste, Bases have a bitter taste.
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