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3 years ago

Which statement is the best interpretation of the ray diagrem shown below

Physics

2 answers:

Allushta [10]3 years ago

8 0

Answer:

B...................

stepladder [879]3 years ago

6 0

Answer:

Option A is correct: "A concave mirror forming a larger, virtual image"

Explanation:

There are two types of mirror:

Concave (converging) mirrors: a concave mirror is a mirror that reflects the light inward

Convex (diverging) mirrors: a convex mirror is a mirror that reflects the light outward

The image formed by a mirror can also be of two types:

Real image: it is formed on the same side of the object, with respect to the mirror

Virtual image: it is formed on the opposite side of the object, with respect to the mirror

In the figure of this problem, we see that:

< The mirror reflects the light from the object inward --> so it is a concave mirror

< The image is formed on the other side of the mirror --> it is a virtual image

So the correct option is

A) A concave mirror forming a larger, virtual image 

 

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How long would it take an object to reach the ground from the top of a building that is 470 feet tall? Round to the nearest tent

Zinaida [17]

Answer:

It would take the object 5.4 s to reach the ground.

Explanation:

Hi there!

The equation of the height of a free-falling object at any given time, neglecting air resistance, is the following:

h = h0 + v0 · t + 1/2 · g · t²

Where:

h = height of the object at time t.

h0 = initial height.

v0 = initial velocity.

g = acceleration due to gravity (-32.2 ft/s² considering the upward direction as positive).

t = time

Let´s supose that the object is dropped and not thrown so that v0 = 0. Then:

h = h0 + 1/2 · g · t²

We have to find the time at which h = 0:

0 = 470 ft - 1/2 · 32.2 ft/s² · t²

Solving for t:

-470 ft = -16.1 ft/s² · t²

-470 ft / -16.1 ft/s² = t²

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