1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
posledela
3 years ago
11

The image of a distant tree is virtual and very small when viewed in a curved mirror. The image appears to be 22.9 cm behind the

mirror. What kind of mirror is it?
What is its radius of curvature? (in cm)
Physics
2 answers:
lord [1]3 years ago
7 0

Answer:

45.8 cm

Explanation:

distance of object from the mirror is infinity

distance of image, v = 22.9 cm

The mirror is convex because it is used to see the distant objects and the image formed by the mirror is erect and small.

use mirror formula

Let f be the focal length of the mirror

1 / f = 1 / v + 1 / u

1 / f = 1 / 22.9  + 1 / ∞

f = 22.9 cm

radius of curvature = 2 x focal length

radius of curvature = 2 x 22.9 = 45.8 cm

Dovator [93]3 years ago
4 0

Answer:

<em>A. The mirror is a convex mirror</em>

<em>B.  The radius of curvature of the convex mirror is -45.8 cm</em>

Explanation:

A. Obtaining the focal length

The radius of curvature is twice the size of the focal length, the focal length is related to object and image distance with the expression below;

1 / f = 1 / v + 1 / u ...................1

f is the focal length

Since the image (v) is formed at the back of the mirror v = -22.9 cm

u is the distance of the object from the mirror  =  ∞

Substituting into equation 1

1 / f = 1 / [(-22.9)  + 1 / ∞]

1/f = 1/(-22.9)

f = -22.9

Since the focal length is negative, the mirror is  convex.

B The radius of curvature

The radius of curvature is twice the focal length of the mirror and expressed  thus;

radius of curvature = 2 x focal length

r = 2 x f

r = 2 x (-22.9 cm)

 = -45.8 cm

Therefore the radius of curvature of the convex mirror is -45.8 cm

You might be interested in
Mention one life application on density ​
kow [346]

One well-known application of density is determining whether or not an object will float on water. If the object's density is less than the density of water, it will float; if its density is less than that of water, it will sink.In fact, submarines dive below the surface of the water by emptying their ballast tanks

5 0
2 years ago
How does the matter and (solar) energy move through the sphere?
Tema [17]
When the Sun's energy moves through space, it reaches Earth's atmosphere and finally the surface. This radiant solar energy warms the atmosphere and becomes heat energy. This heat energy is transferred throughout the planet's systems in three ways: by radiation, conduction, and convection.
5 0
3 years ago
PLEASE help with this question!
Ainat [17]

Answer:

the answer might the number 2

Explanation:

6 0
2 years ago
If we keep on applying force on a material object, can it gain speed of light?
Xelga [282]

Answer:

As an object moves faster, its mass increases. ... Because masses approach infinity with increasing speed, it is impossible to accelerate a material object to (or past) the speed of light. To do so would require an infinite force.

8 0
3 years ago
Does water expand more as the temperature drops even more below 0 deg? I am worried about the coolant in my rad. as the temp.is
alex41 [277]
Water is, indeed, an exception. Normally when temperature drops, material shrinks. Water doesn't, water expands instead.
4 0
3 years ago
Other questions:
  • How does the electron-cloud model describe electrons?
    14·1 answer
  • A certain wire, 3 m long, stretches by 1.2 mm when under tension of 200 N. By how much does an equally thick wire 6 m long, made
    9·2 answers
  • Can someone please here me I’m confused
    9·1 answer
  • If the intensity of an electromagnetic wave is 80 MW/m2, what is the amplitude of the magnetic field of this wave
    14·1 answer
  • A straight 2.20 m wire carries a typical household current of 1.50 A (in one direction) at a location where the earth's magnetic
    11·1 answer
  • A 1200 kg truck is moving to the right at the speed of 30 m/s. It hit another identical truck that was at rest. The two trucks s
    10·1 answer
  • Two satellites A and B orbit the Earth in the same plane. Their masses are 5 m and 7 m, respectively, and their radii 4 r and 7
    5·1 answer
  • What are the prevailing winds from the west toward the east called?
    13·1 answer
  • A race car traveling at 44m/s slows at a constant rate to a velocity of 22m/s over 11 seconds , how far does it move during this
    12·1 answer
  • Letícia leaves the grocery store and walks 150. 0 m to the parking lot. Then, she turns 90° to the right and walks an additional
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!