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
klio [65]
2 years ago
9

A 12-inch object is placed 30 inches in front of a plane mirror. A ray of light from the object strikes the mirror at a 45-degre

e angle. How tall is the image produced by the mirror?
A) 12 inches
B) 30 inches
C) 24 inches
D) 45 inches
Physics
2 answers:
JulsSmile [24]2 years ago
4 0

Answer: A. 12inches

Explanation:

One of the characteristics of an object placed in front of a plane mirror is that the object distance(u) is equal to the image distance(v) no matter the position of the object from the mirror.

Since object distance is 30 inches, the image distance will be 30inches as will i.e u = v

Using the relationship to get the height of the image

v/u = h1/h0

Where h1 is image height and h0 is object height.

h0 = 12inches

Substituting the values given in the formula we have

30/30 = h1/12

h1 = 12inches.

This means that the image produce by the object is also 12inches tall.

gtnhenbr [62]2 years ago
3 0

I believe that it is C.24 inches

You might be interested in
Helpppppppp please !!!!
agasfer [191]

Answer:

second one is correct that is right

7 0
3 years ago
Dr. Matthews has submitted a proposal to the institutional review board (IRB) of a university. At this university, she intends t
OlgaM077 [116]
The IRB at the university will decide whether her study meets ethical guidelines before it is initiated. The importance of these codes of conduct is to safeguard research participants, the status of psychology and the researchers or psychologists themselves. Moral issues hardly yield a simple, unequivocal, right or wrong answer. It is consequently often a matter of judgment whether the research is justified or not. For instance, it might be that a study roots psychological or physical uneasiness to participants, maybe they agonize pain or maybe even come to solemn harm.
6 0
3 years ago
Consider heat transfer between two identical hot solid bodies and the air surrounding them. The first solid is being cooled by a
Nitella [24]

Answer:

The solution to the question above is explained below:

Explanation:

For which solid is the lumped system analysis more likely to be applicable?

<u>Answer</u>

The lumped system analysis is more likely to be applicable for the body cooled naturally.

<em>Question :Why?</em>

<u>Answer</u>

Biot number is proportional to the convection heat transfer coefficient, and it is proportional to the air velocity. When Biot no is less than 0.1 in  the case of natural convection, then lumped analysis can be applied.

<u>Further explanations:</u>

Heat is a form of energy.

Heat transfer describes the flow of heat across the boundary of a system due to temperature differences and the subsequent temperature distribution and changes. There are three different ways the heat can transfer: conduction, convection, or radiation.

Heat transfer  analysis which utilizes this idealization is known as the lumped system analysis.

The Biot number is a criterion dimensionless quantity used in heat transfer calculations which gives a direct indication of the relative importance of conduction and convection in determining the temperature history of a body being heated or cooled by convection at its surface. In heat transfer analysis, some bodies are observed to behave like a "lump" whose entire  body temperature remains essentially uniform at all times during a heat transfer process.

Conduction is the transfer of energy in the form of heat or electricity from one atom to another within an object and conduction of heat occurs when molecules increase in temperature.

Convection is a transfer of heat by the movement of a fluid. Convection occurs within liquids and gases between areas of different temperature.

7 0
3 years ago
Which of the following is not predicted by a higher inhibitory control during childhood
ololo11 [35]

-happiness

Explanation:

  • Happiness is a result of desires.
  • People are known to feel happy when some of their most important desires are fulfilled.
  • If desire is not important, people feel only greater or less satisfaction. But at one level, desires and happiness are excluded because when some desires are fulfilled they are extinguished, and only the feeling of happiness slowly fades.
  • Happiness should not be waited passively, it should not be expected that it will come from the outside through some happy event or that other people will make us happy through great love.

Learn more on

brainly.com/question/1041580

brainly.com/question/3492822

#learnwithBrainly

8 0
3 years ago
A 934 kg object at rest has what momentum ?
AlekseyPX

Answer:

0

Explanation:

An object that is at rest and not moving will always have 0 momentum!

I hope this helped!

6 0
2 years ago
Other questions:
  • A flare is launched from a life raft with an initial velocity of 192 ft/sec. How many seconds will it take for the flare to retu
    15·1 answer
  • What are the dark spots and light areas on the moon called
    5·1 answer
  • Na+/k+–atpase is considered to be an electrogenic pump because
    13·1 answer
  • A car traveled 80 kilometers in 4 hours. Its average speed was _________.
    7·2 answers
  • An old iron battery was discarded in this meadow. The iron in the battery is undergoing a ____ change as it rusts. The rusting i
    13·2 answers
  • An average human has a heart rate of 70 beats per minute. If someone's heart
    10·2 answers
  • Please PLEASE HELP ASAP
    6·1 answer
  • Why is it important to study electromagnetic waves?
    11·1 answer
  • Select the correct arrow.<br> Which arrow correctly shows the flow of heat?<br> Reset<br> Next
    9·2 answers
  • The hypothetical upper limit to the mass a star can be before it self-destructs due to the massive amount of fusion it would pro
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!