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Kisachek [45]
3 years ago
14

SUPER EASY!!!! WILL GIVE BRAINLIEST

Physics
1 answer:
julsineya [31]3 years ago
6 0

Answer:

A

Explanation:

don't mind that other guy... that was so rude the answer's A

you must be panicking lol last day of school today!

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The average human hair has a diameter of 100,000 nm. We can see individual hairs because hair has a diameter greater than the wa
sertanlavr [38]

B is the correct answer, since all others are not true or are based on assumption

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Lana71 [14]
Answer:

I’m pretty sure the answer is distance

Explanation:

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An object is placed 9.5 cm in front of a convex spherical mirror. Its image forms 3.2 cm behind the mirror. What is the radius o
o-na [289]

Using the mirror formula.

1/v + 1/u = 1/f

1/9.5 + 1/3.2 = 1/f

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4 years ago
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A hair dryer draws 11 A when it is connected to 120 V. If electrical energy costs $ 0.09/kW·h, what is the cost of using the hai
Papessa [141]

Answer:

The cost of using the hair dryer for 15 minutes is \$3.6\bar 6

Explanation:

The parameters given in the question are;

The electric current drawn by the the air dryer, I = 11 A

The voltage to which the hair dryer is connected, V = 120 V

The duration of usage of the hair dryer = 15 minutes = 60 minutes /4 = 1 hour/4 = 0.25 hour

The electrical energy costs $0.09/kW·h

The power consumed by the hair dryer = I × V = 11 × 120 = 1320 Watts = 1.32 kW

The energy used by the hair dryer in 15 minutes (0.25 hour) = 1.32 × 0.25 0.33 kW·h

The energy used by the hair dryer in 15 minutes (0.25 hour) = 0.33 kW·h

The energy cost = $0.09/(kW·h)

Therefore;

The cost of using the hair dryer for 15 minutes (0.25 hour) = 0.33 kW·h/($0.09/(kW·h)) = $33/9 = $3 2/3 = $3.6\bar 6.

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3 years ago
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