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
Luda [366]
3 years ago
14

Which optical device can focus light to a point through reflection?

Physics
1 answer:
nekit [7.7K]3 years ago
6 0

Answer:

It is A

Explanation:

You might be interested in
List at least types of motion​
Firlakuza [10]

Answer:

These four are rotary, oscillating, linear and reciprocating. Each one moves in a slightly different way and each type of achieved using different mechanical means that help us understand linear motion and motion control.

(I got this off the web so credits to the rightful owner and I hope you have good day :)

5 0
3 years ago
Read 2 more answers
Which of the following BEST describes sports etiquette?
Svetlanka [38]

Answer:

Football

Explanation:

Its a American sport and mostly one of the toughest

8 0
4 years ago
Object A and Object B have the same volume of 10 cm³. Object A has a mass of 20 grams. Object B has a mass of 50 grams. Which ob
aniked [119]

Answer:

Object B has greater density

desity A=20/10=2 g cm^-3 . density B=50/10=5 g cm^-3

the object that has greater mass has the greater density because the volume of the those two objects are same

3 0
3 years ago
For communication to take place, there has to be:
aliya0001 [1]
Communication can be anything that transmits a message. 

Answer: <span>A. transmission of the message. </span>
6 0
3 years ago
The instantaneous speed of a particle moving along one straight line is v(t) = ate−6t, where the speed v is measured in meters p
beks73 [17]

Answer:

v_max = (1/6)e^-1 a

Explanation:

You have the following equation for the instantaneous speed of a particle:

v(t)=ate^{-6t}   (1)

To find the expression for the maximum speed in terms of the acceleration "a", you first derivative v(t) respect to time t:

\frac{dv(t)}{dt}=\frac{d}{dt}[ate^{-6t}]=a[(1)e^{-6t}+t(e^{-6t}(-6))]  (2)

where you have use the derivative of a product.

Next, you equal the expression (2) to zero in order to calculate t:

a[(1)e^{-6t}-6te^{-6t}]=0\\\\1-6t=0\\\\t=\frac{1}{6}

For t = 1/6 you obtain the maximum speed.

Then, you replace that value of t in the expression (1):

v_{max}=a(\frac{1}{6})e^{-6(\frac{1}{6})}=\frac{e^{-1}}{6}a

hence, the maximum speed is v_max = ((1/6)e^-1)a

5 0
3 years ago
Other questions:
  • Which of the following is true for projectile motion?
    13·2 answers
  • Someone who’s good at physics help please :)
    12·1 answer
  • How do I work this out
    8·1 answer
  • Graphs are ____ of relationships.
    9·1 answer
  • In nuclear fission, a nucleus of uranium-238, containing 92 protons, can divide into two smaller spheres, each having 46 protons
    6·1 answer
  • An 800-N woman stands on a scale in an elevator. What does the scale read when the elevator is...
    9·1 answer
  • Why are asteroids and comets important to our understanding of solar system history?
    5·1 answer
  • Consider a 2-kg bowling ball sits on top of a building that is 40 meters tall. It falls to the ground. Think about the amounts o
    11·1 answer
  • How do you convert 15000 Fg to mass in Kg?
    5·1 answer
  • A wave has a period of 2 seconds and a wavelength of 4 meters. Calculate its frequency and speed.
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!