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MArishka [77]
3 years ago
9

Two small spheres spaced 20.0 cm apart have equal charge. How many excess electrons must be present on each sphere if the magnit

ude of the force of repulsion between them is 4.57 x 10-21 N?
A. 562
B. 9.14 * 10^3
C. 1.01 * 10^6
D. 891
Physics
1 answer:
Pavlova-9 [17]3 years ago
3 0
I believe the answer is B9.14*10^3
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A small oil droplet is sprayed between the plates of a parallel plate capacitor. The droplet has a net charge equal to that of 3
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A wye-connected load has a voltage of 480v applied to it. What is the voltage drop across each phase
rodikova [14]

Answer:

Y_A=277.128 \angle 30v

Y_B=277.128 \angle (-150)v

Y_C=277.128 \angle (90)v

Explanation:

From the question we are told that

Voltage V_L_L =480v

Generally in a case of Y_connection V_p_ h is mathematical represented as

V_p_h=\frac{V_l_l}{\sqrt{3}} \angle (\phi-30)v

Generally voltage drop across phase A

Y_A=\frac{408}{\sqrt{3}} \angle -(0-30)

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Generally voltage drop across phase B

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Y_B=277.128 \angle (-150)v

Generally voltage drop across phase C

Y_C=277.128 \angle (-30+120)

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24. What does the atomic number tell you about an atom? What does the mass number tell you about
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Using local acceleration of gravity data from the Internet, de- termine the weight, in N, of a person whose mass is 80 kg living
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weight = 80 × 9.796 = 783.68 N

c)  Tokyo, Japan

acceleration due to gravity in cape town  = 9.798 m/s²

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d)  Chicago, IL

acceleration due to gravity in cape town  = 9.803 m/s²

weight = 80 × 9.803 = 784.24 N

e) Copenhagen, Denmark

acceleration due to gravity in cape town  = 9.815 m/s²

weight = 80 × 9.815 = 785.2 N

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4 years ago
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