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Maksim231197 [3]
2 years ago
12

Which best describes the surface of a concave mirror?

Physics
2 answers:
lina2011 [118]2 years ago
8 0
It curves inward is the answer
garik1379 [7]2 years ago
6 0

Answer:

It curves inward

Explanation:

Of the choices given it is the only one that makes sense

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The efficiency of a modern bicycle is 95% if you exert 200 Joules of input work pedaling a bicycle on level ground what is the u
Delvig [45]

Answer:

95 J

Explanation:

You can calculate efficiency by dividing useful output by total input, then multiplying it to 100.

So the foumula goes like:

Efficiency= (Useful output/Total input)x100

In this question,

Efficiency= 95%

Useful output= x

Total input= 200

Therefore;

95=(x/200)x100

0.95=x/100

x=0.95x100

x=95 Joules

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2 years ago
Please help me with the question below
vampirchik [111]

Answer:

a cold air mass and a warm air mass merge together

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A bungee cord has a spring constant of 82.5 N/m. After jumping, a person oscillates with a period of 7.50 s. What is the mass of
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Answer:

Explanation:

T = 2π √ (m/k)

T / 2π = √ (m/k)

T√k = 2π √m

(T√k) / 2π = √m

( (T√k) / 2π)^2 = m

m = ( (7.5√82.5) / 2π)^2

m = 117.66 Kg

3 0
2 years ago
The weather conditions
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How to find the solution
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To what I don’t see anything
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