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Ivahew [28]
3 years ago
15

Which two parameters can both be measured in meters

Physics
2 answers:
MatroZZZ [7]3 years ago
5 0
The Correct answer is A
Lera25 [3.4K]3 years ago
3 0
I believe the answer is A.

Explanation:
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UP TO four inches but usually a little slower than that

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A constant electric field of magnitude E = 148 V/m points in the positive x-direction. How much work (in J) does it take to move
DochEvi [55]

Answer:

W=-2.1405\times 10^9\,J

Explanation:

Given:

electric field, E=148\,V.m^{-1}

charge, Q=-13\,\mu C=-13\times 10^{-6}\,C

initial position coordinates, p1 =(-18,-131)

final position coordinates,   p2 =(107,76)

We find the distance through which the charge has been moved:

d=\sqrt{(x1-x2)^2+(y1-y2)^2}

Where we have (x1,y1) & (x2,y2) as the initial and final coordinates of the points.

d=\sqrt{(107-(-81))^2+(76-(-131))^2}

d= 279.63\,m

Now we need the angle through which displacement is made with respect to the direction of electric field.

tan\,\theta= \frac{y2-y1}{x2-x1}

\theta= tan^{-1}[\frac{76-(-131)}{107-(-81)} ]

\theta= 47.75^{\circ}

Now from the relation between the change in potential difference:

\Delta V= E.d.cos\,\theta

\Delta V= 148\times 279.63\times cos\,47.75^{\circ}

\Delta V= 27826.06 V

∵The change in voltage is defined as the work done per unit charge.

∴\Delta V=\frac{W}{Q}

W=\frac{\Delta V}{Q}

Putting the respective values

W=\frac{27826.06 }{-13\times 10^{-6}}

W=-2.1405\times 10^9\,J

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3 years ago
If three balls of different materials were dropped at the same time from the same height, which would hit the ground first? (Ass
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It depends of the mass and weight of each of the materials

Explanation:

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You want to photograph a circular diffraction pattern whose central maximum has a diameter of 1.0 cm . You have a helium-neon la
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Answer:

71 cm

Explanation:

The formula to apply here is θ = 1.22λ/D,

diameter of central maximum =1.0 cm

wavelength,   λ= 633 nm

Diameter of pinhole = 0.11 mm

where θ = arc length/distance = s/R

s/R = 1.22λ/D

(.005)/R = (1.22)(633 X 10^-9)/(1.1 X 10^-4)

R = .71 m   which is 71 cm

6 0
3 years ago
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