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maria [59]
3 years ago
10

An object moves 120 m in 15 seconds. Calculate the object's speed.

Physics
1 answer:
lions [1.4K]3 years ago
3 0

Answer:

8m/s

Explanation:

speed= distance/time

s= 120/15

= 8m/s

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Discuss how a photon (aka the light particle) can be affected by gravity despite being massless.
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As current increases in an electromagnet’s coil, the strength of the magnet field _______(increases, decreases, remains the same
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3 years ago
Two very large parallel metal plates, separated by 0.20 m, are connected across a 12-V source of potential. An electron is relea
Semmy [17]

Answer:

{\rm K} = 2.4\times 10^{-19}~J

Explanation:

The electric field inside a parallel plate capacitor is

E = \frac{Q}{2\epsilon_0 A}

where A is the area of one of the plates, and Q is the charge on the capacitor.

The electric force on the electron is

F = qE = \frac{qQ}{2\epsilon_0 A}

where q is the charge of the electron.

By definition the capacitance of the capacitor is given by

C = \epsilon_0\frac{A}{d} = \frac{Q}{V}\\\frac{Q}{\epsilon_0 A} = \frac{V}{d} = \frac{12}{0.20} = 60

Plugging this identity into the force equation above gives

F = \frac{qQ}{2\epsilon_0 A} = \frac{q}{2}(\frac{Q}{\epsilon_0 A}) = \frac{q}{2}60 = 30q

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Therefore, the kinetic energy is 2.4\times 10^{-19}

8 0
4 years ago
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