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yarga [219]
3 years ago
6

Many sophisticated cameras have zoom lenses. When you select the telephoto setting, the objects in front of you appear much clos

er. In this setting, (A) the focal length of the lens is shorter than normal. (B) the aperture of the lens is larger than normal. (C) the focal length of the lens is longer than normal. (D) the aperture of the lens is smaller than normal.
Physics
1 answer:
Vladimir79 [104]3 years ago
7 0

The amswer is a i think cuz it make semse

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Which of the following is a correct example of an action reaction pair?
nydimaria [60]

Answer:

its either d or a

Explanation:

imma say d looks pretty right though

3 0
3 years ago
How do altitude temperature and air pressure relate
kiruha [24]
They relate because the further up you go, the colder it gets, and the air pressure decreases the further up you go. The altitude temperature and the air pressure both decrease, and that is their relationship. Altitude temperature decreases, the higher you go, and air pressure also decreases, the higher up you go. Therefore, the lower down you go, the higher the air pressure, and the higher the altitude temperature.

Hope this helps and have a nice day:)
7 0
3 years ago
Read 2 more answers
How can force-time and force-displacement graphs be used to find the impulse or work done?
balandron [24]

Answer:

A. Area under force-time graph & Area under force-displacement graph

Explanation:

To find the impulse or work done the area under force-time graph and area under force-displacement graph will give us these respective values.

 Impulse  = Force x time

 Work done  = Force x displacement

When we plot a graph of force and time, the area under it is the impulse.

When a graph of force and displacement is plotted, the area under is the work done.

7 0
2 years ago
Consider a 3 m long string, clamped at both ends. The string has a mass of 60 g and waves travel at v = 100 m/s. The third harmo
PilotLPTM [1.2K]

Answer:

a) λ = 2 m

, c)  f = 50 Hz

Explanation:

When a string is fixed at the ends the wave is reflected at each end, giving rise to a standing wave.

Since we extract them are fixed we have nodes at these points, the wavelength in the string is

fundamental       λ = 2L

2nd harmonic      λ= 2L / 2

3 harmonica         λ= 2L / 3

a and b) from aui we can find the wavelength

             λ = 2 3/3

             λ = 2 m

c) the speed of the wave is related to the frequency and wavelength

          v = λ f

          f = v / λ

          f = 100/2

          f = 50 Hz

d) the acceleration can be found with the equations

         a = d²y / dt²

the standing wave equation is

          y = 2A sin kx cos wt

          a = -2A w² sin kx cos wt

the acceleration is maximum when the cosine is ±1

          A = 2A w² sin kx

the oscillatory part indicates that the wave moves, if we make this maximum vine, they relate it to

          a = 2A w²

          w = 2πf

          A = 0.2 cm = 0.002 m

         a = 2 0.002 (2π 50)²

         a = 98.7 m / s

8 0
3 years ago
? If you are not moving, Newton's First Law says you
Rama09 [41]

Newton's First Law states that when an object is not in motion, it will stay motionless until a force is acted upon it. In this case, you are not moving, so unless a force acts upon you, you will stay in place.

8 0
3 years ago
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