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balu736 [363]
3 years ago
13

Do the two cars ever have the same velocity at one instant of time? If so, between which two frames? Check all that apply. Check

all that apply. Cars have the same velocity at one instant of time between dots 1 and 2. Cars have the same velocity at one instant of time between dots 2 and 3. Cars have the same velocity at one instant of time between dots 3 and 4. Cars have the same velocity at one instant of time between dots 4 and 5. Cars have the same velocity at one instant of time between dots 5 and 6. Cars never have the same velocity at one instant of time.

Physics
1 answer:
alexgriva [62]3 years ago
8 0

Answer:

Cars have the same velocity at one instant of time between dots 4 and 5.

Explanation:

after looking at the image it is visible that same distance is covered by both cars in the frame between 4 and 5

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Calculate the electric field intensity at a point 3 cm away from point charge of 3 x 10^-9 C.
lukranit [14]

Answer:

The electric field intensity is <u>30000 N/C.</u>

Explanation:

Given:

Magnitude of the point charge is, q=3\times 10^{-9}\ C

Distance of the given point from the point charge is, d=3\ cm=0.03\ m

Electric field intensity is directly proportional to the magnitude of point charge and inversely proportional to the square of the distance of the point and the given charge.

Therefore, electric field intensity 'E' at a distance of 'd' from a point charge 'q' is given as:

E=\frac{kq}{d^2}

Plug in k=9\times 10^9\ N\cdot m^2/C^2, q=3\times 10^{-9}\ C, d=0.03\ m. Solve for 'E'.

E=\frac{(9\times 10^9\ N\cdot m^2/C^2)(3\times 10^{-9}\ C)}{(0.03\ m)^2}\\\\E=\frac{27}{0.0009}\ N/C\\\\E=30000\ N/C

Therefore, the electric field intensity at a point 3 cm from the point charge is 30000 N/C.

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Answer:

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Explanation:

D is the most highest one so

the answer is D

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Which best explains how the diffraction pattern observed in young’s experiment supports the wave theory of light?.
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Answer: the airy pattern can only arise from wave propagation

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