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NemiM [27]
3 years ago
14

What is f if you have an object 2.0 m from the concave mirror, and the image is 4.0 m from the mirror?

Physics
1 answer:
dezoksy [38]3 years ago
7 0

Answer:

the f is 1.3 m

Explanation:

Given that

An object 2.0m is from the concave mirror

And, the image is 4.0m from the mirror

We need to find out the f

So,

u = -2 m

v = -4 m

1 ÷ f = 1 ÷ v + 1 ÷ u

= (-1 ÷ 4) + (-1 ÷ 2)

= -3 ÷4

f = -4 ÷ 3

= |1.3| m

Hence, the f is 1.3 m

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Which best describes the type of lens that would help someone with one of these eye conditions? Concave lenses would help someon
s2008m [1.1K]

Answer:

The answer is "Option a".

Explanation:

The concave lenses are there for narrow-sighted people, convex for the far people. In eyewear, curved lenses are used to rectify visibility. Since in nearsighted individuals the width between the eye lens as well as the retina is larger than should be, these readers can't clearly distinguish distant things.

7 0
3 years ago
Read 2 more answers
A sound wave produced by a chime 515 m away is heard 1.50 s later. What is the speed of the sound in the air?
aliina [53]

Answer:

the speed of the sound in the air is 343.3 m/s

Explanation:

The computation of the speed of the sound in the air is shown below:

As we know that

Speed = Distance ÷ time

So, here speed be 515 m

And, the time is 1.50 seconds

So, the speed of the sound is

= 515 m ÷ 1.50 seconds

= 343.3 m/s

hence, the speed of the sound in the air is 343.3 m/s

6 0
3 years ago
As you drive away from a radio transmitter, the radio signal you receive from the station is shifted to longer wavelengths.
mylen [45]

Answer:

True

Explanation:

{Apparent}.wavelength = (True.wavelength)(1 +\frac{recession.velocity}{wave.speed})

As one drive away from the radio station, the recession velocity increases and causes the apparent wavelength to increase accordingly, which in turn causes the True wavelength received from the radio station to increase as well because of their direct relationship as shown in the equation above.

5 0
3 years ago
A roller coaster moving down a hill is an example of what kind of energy
GalinKa [24]
That would be kinetic energy
5 0
3 years ago
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If a honeybee is flying 7.0 m/s, what is the kinetic energy (Joules) if its mass is 0.1 g?
svetlana [45]

Answer:

KINETIC ENERGY=K.E=0.00245 Joules ≈ 0.003 Joules

Explanation:

mass=m=0.1g=0.0001kg

velocity=v=7.0m/s

kinetic energy=K.E.=?

as we know that

kinetic energy=\frac{1}{2}mv^2\\ putting values\\kinetic energy=\frac{1}{2}(0.0001kg)(7.0m/s)^2\\ kinetic energy=\frac{1}{2} 0.0049joules\\kinetic energy= 0.00245Newton meter or joules

hope it will help ^_^

5 0
3 years ago
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