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777dan777 [17]
3 years ago
12

10. John has borrowed his parents car without permission and is driving without a license. He

Physics
1 answer:
Natasha2012 [34]3 years ago
4 0
Yes

Explanation:
John is driving at 25 meters per second and he has to drive 500 meters to get to his house.
I divided 500 by 25 to see how long it would take for John to get to his house
- 500/25= 20

Therefore, it will take John 20 seconds to reach his driveway, which is 25 seconds less than how long it will take his parents- so he will get to the driveway before them.
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The answer is letter c.

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You are driving at 40 miles per hour and you speed up to 60 miles per hour over the course of 20 miles. How long were
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4. An airplane maintains a constant acceleration of 4.0 m/s2 [E] as it speeds up from 16 m/s [E] to 28 m/s [E].
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The electric field strength in the space between two closely spaced parallel disks is 1.0 105 N/C. This field is the result of t
balu736 [363]

Answer:

D=2.996\times 10^{-2} m

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*Assume the parallel disks have equal diameters.

Given the electric strength as  1.0\times 10^5 N/C.  transferring 3.9\times 10^9 electrons, the disk's Area can be calculated using the formula:

E=\frac{\eta}{\epsilon_o}=\frac{Q}{A\epsilon_o}\\\\A=\frac{Q}{E\epsilon_o}\\\\=\frac{(3.9\times 10^9)\times (1.6\times10^{-19})}{(1.0\times 10^5 )\times (8.85\times10^{-12})}\\\\A=7.0508\times 10^{-4} \ m^2

#We now calculate the disks diameter:

A=\pi(D/2)^2\\\\2\sqrt{\frac{A}{\pi}}=D\\\\=2\sqrt{7.0508\times 10^{-4}/\pi}\\\\D=2.996\times 10^{-2} \ m

Hence, the diameter of the disks is D=2.996\times 10^{-2} m

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3 years ago
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Explanation: its common sense

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