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
KiRa [710]
3 years ago
7

A solar cooker, really a concave mirror pointed at the Sun, focuses the Sun's rays 13.8 cm in front of the mirror. Part A What i

s the radius of the spherical surface from which the mirror was made?
Physics
1 answer:
shepuryov [24]3 years ago
6 0

From the concept of optics on a curvature of a spherical mirror, the proportion for which the focal length is equivalent to half the radius of curvature is fulfilled. Mathematically this is

f = \frac{R}{2}

Here,

f = Focal Length

R = Radius

Rearranging to find the radius we have,

R = 2f

Replacing with our values,

R = 2(13.8cm)

R = 27.6cm

Therefore the radius of the spherical surface from which the mirror was made is 27.6cm

You might be interested in
"There are two types of error that can occur when making measurements: systematic and random error. How you correct the error de
Murljashka [212]

Answer:

Systematic error can be corrected using calibration of the measurement instrument, while random error can be corrected using an average measurement from a set of measurements.

Explanation:

Random errors lead to fluctuations around the true value as a result of difficulty taking measurements, whereas systematic errors lead to predictable and consistent departures from the true value due to problems with the calibration of your equipment.

Systematic error can be corrected, by calibration of the measurement instrument. Calibration is simply a procedure where the result of measurement recorded by an instrument is compared with the measurement result of a standard value.

Random error can be corrected using an average measurement from a set of measurements or by Increasing sample size.

8 0
3 years ago
The speed of a car is decreased uniformly from 30. meters per second to 10. meters per second in 4.0 seconds. What was the car's
masha68 [24]
Acceleration (magnitude anyway) = (change in speed) / (time for the change) .

Change in speed = (10 - 30) = -20 m/s

Time for the change = 4.0sec

Magnitude of acceleration = -20/4  =  <em>-5 m/s² </em>
3 0
3 years ago
Read 2 more answers
Which do you think changes the land more frozen water or flowing water?
Maksim231197 [3]
I believe flowing water changes the land because eventually frozen water has to melt to flowing water, right?
8 0
3 years ago
Read 2 more answers
What is the difference between landforms and landmarks
Anika [276]
A land form is a natural feature of earths surface and a land mark is can be man-made or natural and it is used to mark something significant. 
7 0
3 years ago
A car is being driven down a level track with no net force on it. This motion is best described as
Alex

A)Linear motion

If there is not net force on the car, then by the Newton Second Law, the acceleration is zero, and the only valid option for zero acceleration is A).

3 0
3 years ago
Other questions:
  • The outstretched hands and arms of a figure skater preparing for a spin can be considered a slender rod pivoting about an axis t
    15·1 answer
  • Define mechanical clock
    13·1 answer
  • A student performs a lab measuring the velocities of toy cars of different masses
    11·2 answers
  • Choose correct answer
    10·2 answers
  • A stationary 15 kg object is located in a table near the surface of the earth. The coefficient of static friction between the su
    8·1 answer
  • A railroad track and a road cross at right angles. An observer stands on the road and watches an eastbound train traveling at 60
    14·1 answer
  • 3. If a vector that is 1 cm long represents a
    15·1 answer
  • As part of his job, Warren attends seminars where he must listen to presentations given by experts in his field. When he is list
    5·1 answer
  • Which resource would be the best choice to learn more information about studying martial arts?
    10·1 answer
  • What voltage is required to move 6A through 5Ω?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!