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kvv77 [185]
3 years ago
12

charge, q1 =5.00μC, is at the origin, a second charge, q2= -3μC, is on the x-axis 0.800m from the origin. find the electric fiel

d at a point on the y-axis 0.500m from the origin.
Physics
1 answer:
IRISSAK [1]3 years ago
3 0

Answer:

Explanation:

Electric field due to charge at origin

= k Q / r²

k is a constant , Q is charge and r is distance

= 9 x 10⁹ x 5 x 10⁻⁶ / .5²

= 180 x 10³ N /C

In vector form

E₁ = 180 x 10³ j

Electric field due to q₂ charge

= 9 x 10⁹ x 3 x 10⁻⁶ /.5² + .8²

= 30.33 x 10³ N / C

It will have negative slope θ with x axis

Tan θ = .5 / √.5² + .8²

= .5 / .94

θ = 28°

E₂ = 30.33 x 10³ cos 28 i - 30.33 x 10³ sin28j

= 26.78 x 10³ i - 14.24 x 10³ j

Total electric field

E = E₁  + E₂

= 180 x 10³ j +26.78 x 10³ i - 14.24 x 10³ j

= 26.78 x 10³ i + 165.76 X 10³ j

magnitude

= √(26.78² + 165.76² ) x 10³ N /C

= 167.8 x 10³  N / C .

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The waves that heat a cup of water in the microwave are an example of electromagnetic waves. True or False
Oksana_A [137]

That's true.

They're radio waves, at the frequency of 2.45 GHz (in all microwave appliances manufactured in the US).

5 0
3 years ago
A 15W fluorescent light bulb uses operates for 30 minutes and produces 20kJ of light energy, what is the percent efficiency of t
svlad2 [7]

Given that ;

Energy (work ) Produced by bulb =20 KJ = 20000 J

Input power = 15 KW

Output power given by the bulb  = Rate of doing work

                                                   = Work ÷ time

                                                   = 20000 ÷ 1800   <em>(since 1 min = 60 seconds)</em>

                                                   = 11.11 W

Noe, efficiency is the ratio of output power to input power

                                                   η = output power ÷ input power

                                                      = 11.11 ÷ 15

                                                      = 0.74

                                                      = 74%

<em>Efficiency of light bulb is 74%</em>

<em>If you liked the procedure, please give me brainliest</em>


8 0
3 years ago
Galileo was a contemporary of
kvasek [131]

Answer:

Galileo Galilei was contemporary to Johannes Kepler. they worked together for a while.

4 0
3 years ago
A brush fire is burning on a rock ledge on one side of a ravine that is 25 m wide. A fire truck sits on the opposite side of the
Ierofanga [76]

Answer:

v_o = 30.5 m/s

Explanation:

Height of the hose pipe is given as

y = 4.5 m

horizontal distance is given as

x = 25 m

angle of elevation is given as 35 degree with the horizontal

now we know that the horizontal distance moved is given as

x = (v_ocos35) t

y = 4.5 + (v_o sin35) t - \frac{1}{2}(9.8)t^2

now we have

25 = v_o(0.82)t

also we have

0 = 4.5 + 0.57 v_o t - 4.9 t^2

0 = 4.5 + (0.57)(0.82) - 4.9 t^2

t = 1.00 s

so we have

v_o = 30.5 m/s

8 0
3 years ago
Two very small 8.55-g spheres, 15.0 cm apart from center to center, are charged by adding equal numbers of electrons to each of
Leona [35]

Answer:

1.43 x 10¹⁷.

They will accelerate away from each other.

Explanation:

Force on each charged sphere F = mass x acceleration

= 8.55 x 10⁻³ x 25 x 9.8

= 2.095 N

Let Q be the charge on each sphere

F = \frac{9\times10^9\times Q^2}{(15\times10^{-2})^2}

2.095 =\frac{9\times10^9\times Q^2}{(15\times10^{-2})^2}

Q² =\frac{2.095\times(15)^2\times10^{-4}}{9\times10^9}

Q = 2.289 X 10⁻⁶

No of electrons = Charge / charge on a single electron

= \frac{2.289\times10^{-6}}{1.6\times10^{-19}}

=1.43 x 10¹³.

They will accelerate away from each other.

4 0
3 years ago
Read 2 more answers
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