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Leno4ka [110]
3 years ago
13

If the distance doubles, what happens to the force?

Physics
1 answer:
Alenkinab [10]3 years ago
3 0
I think that it is D
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A police car on the side of the road (at rest) uses a radar gun to catch speeders as they approach it. The frequency the radar g
oee [108]

Answer:

\Delta f = 1.49 \times 10^9 Hz

Explanation:

Apparent frequency that is received to the speeder is given as

f_1 = f_0\frac{v + v_o}{v}

f_1 = (8 \times 10^9)\frac{340 + v_o}{340}

here we know that

v_o = 65 mph = 29 m/s

now we have

f_1 = (8 \times 10^9)\frac{340 + 29}{340}

f_1 = 8.68 \times 10^9 Hz

now the frequency that is received back from the speeder is given as

f_2 = f_1\frac{v}{v- v_o}

f_2 = (8.68 \times 10^9}\frac{340}{340 - 29}

f_2 = 9.49 \times 10^9 Hz

So difference is the frequency is given as

\Delta f = 9.49 \times 10^9 - 8 \times 10^9

\Delta f = 1.49 \times 10^9 Hz

4 0
3 years ago
In electric motors and electric generators, which part is responsible for transferring current from the power source to the comm
laiz [17]
The BRUSH <span>In electric motors and electric generators is responsible for transferring current from the power source to the commutator or from the slip rings to where the electricity is needed</span>
5 0
4 years ago
Read 2 more answers
(a) When opening a door, you push on it perpendicularly with a force of 55.0 N at a distance of 0.850m from the hinges. What tor
nadezda [96]

Explanation:

Below is an attachment containing the solution.

7 0
3 years ago
John runs for 10 mins at a uniform speed 9kn/h. At what speed should he run for the next 20mins so that theaverage speed comes t
kolbaska11 [484]

Answer:

13.5 km/h

Explanation:

John runs for 10 min at 9 km/h, then 20 min at v.  He will have run a total of 30 min at 12 km/h.

Therefore:

(30 min) (12 km/h) = (10 min) (9 km/h) + (20 min) v

v = 13.5 km/h

4 0
3 years ago
The gravitational acceleration on Earth is 9. 8 m/s2. What is the weight of a car on Earth (to the nearest whole number) if it h
astraxan [27]

Hi there!

Recall the equation for weight.

W = Mg

W = Weight (N)

M = Mass (kg)
g = acceleration due to gravity (m/s²)


The weight of an object depends upon its MASS and the strength of the GRAVITATIONAL field. We can solve for weight:

W = 1360 * 9.8 = \boxed{13,328 N}

6 0
2 years ago
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