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solniwko [45]
2 years ago
13

A lens of focal length 10.0 cm

Physics
1 answer:
fgiga [73]2 years ago
7 0

Answer:

30cm

Explanation:

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If the numbers on the plate are 6.0 cm apart, and the spy satellite is at an altitude of 160 km , what must be the diameter of t
Alexxx [7]

Answer:

The diameter of the camera aperture must be greater than or equal to 1.49m

Explanation:

Let the distance separating two objects, x = 6.0 cm = 0.06 m

The distance between the observer and the two objects, d = 160 km = 160000 m

Let ∅ = minimum angular separation between the two objects that the satellite can resolve

tan( ∅) = x/d

Since there is minimum angular separation, tan( ∅) ≈∅

∅ = x/d

∅ = 0.06/160000

∅ = 3.75 * 10⁻⁷rad

For the satellite to be able to resolve the objects,

D ≥ 1.22λ/∅

λ = 560 nm = 560 * 10⁻⁹

D  ≥ 1.22 *  (560 * 10⁻⁹)/(3.75 * 10⁻⁷)

D  ≥ 149.33 * 10⁻² m

D  ≥ 1.49 m

7 0
3 years ago
Describe at least two ways nuclear fission was used in the twentieth century
allsm [11]

Is there any options or just a type up answer?

3 0
3 years ago
What color do you think an object would be if it reflected all colors of the visible spectrum?
Lubov Fominskaja [6]
C) The object would be WHITE.

We call "white light" to the sunlight, but referred to the visible part of spectrum. If the object reflects all the light, it appears as a white object.
7 0
3 years ago
You are pulling a suitcase through the airport at a constant speed by exerting a force of 28.0 N at an angle 30.0° from the hori
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The force of friction that is acting on the suitcase is the force that opposes the motion of the suitcase.

<h3>What is friction?</h3>

The force that resists the motion between two bodies in contact. There are some materials that reduces friction such as oil in a car engine reduces friction. In this example, friction creates between the motion of suitcase and with the ground.

So we can conclude that the force of friction that is acting on the suitcase is the force that opposes the motion of the suitcase.

Learn more about force here: brainly.com/question/12970081

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8 0
2 years ago
When a metal sphere is dropped in to a tall cylinder containing liquid its acceleration is g/2 (gravity over 2). Shaow that : de
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Answer:

Fm is the net force down on the metal in air

Fm / 2 is the net force down on the metal in liquid

Fl is the buoyant force on the metal due to liquid

Fm - Fl = Fm / 2      equating upward and downward forces

Fm / 2 = Fl    

The specific gravity of the metal is twice that of the liquid

Note: F = M g = ρ V g     since ρ = M / V

4 0
1 year ago
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