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
vaieri [72.5K]
3 years ago
12

Why is a device never 100% efficient? *

Physics
1 answer:
oksano4ka [1.4K]3 years ago
5 0
I think it’s c, friction
I’m not sure tho
You might be interested in
A car’s velocity changes from 35 m/s to stopped in 13 seconds. Calculate<br> acceleration.
padilas [110]

Answer:

Acceleration = 3m/s^2

Vf= 0  Vi =35m/s   t= 13s

Explanation:

Acceleration = \frac{Change in velocity}{Change in time}\\                      = \frac{35m/s}{13s}\\             a       =   2.69m/s^2\\             a       =    2.7m/s^2\\    a   = 3m/s^2

5 0
3 years ago
An object is falling downward at a rate of 25 m/s. Two seconds later, what is its acceleration?
zhenek [66]

acceleration times time falling

25*2

50 m*s^-1

6 0
4 years ago
PLEASE HELP 15 POINTSexplain properties and importance of light and how it separates into colors
Inessa05 [86]

Answer:

It is not a property of light. It is your eyes and brain.

Specifically, the three kinds of cone cells in our eye that are sensitive to different ranges of the electromagnetic spectrum. The fact that there are three means that color is three dimensional, and is the reason the pure colors form a circle even though the spectrum of wavelengths is linear.

Visible light is part of the electromagnetic spectrum; light waves of different frequencies and wavelengths are distinguished as colors by the human eye. A prism can separate the colors of white light (dispersion) because different frequencies of light have different refractive indices for a given material.

6 0
3 years ago
What was the name of charles lindbergh’s single winged airplane for his solo flight across the atlantic?
aev [14]

Answer:

Spirit of St. Louis

Explanation:

Charles Lindbergh was known as a prolific aviator during the early twentieth century. He is well known for the flight he took from Long Island, New York, to Paris, France. It was a continuous flight across the Atlantic Ocean.

The plane he used was the Spirit of St. Louis which took more than 33 hours to complete the journey. It was the first successful flight of this kind. The airplane flew from Long Island on May 20 and landed in Paris on May 21.

4 0
3 years ago
Classify each of the following chemical reactions. Upper S plus upper O Subscript 2 right arrow upper S upper O subscript 2. Upp
vodka [1.7K]

Check attached image.

4 0
3 years ago
Other questions:
  • A car comes to a bridge during a storm and finds the bridge washed out. The driver must get to the other side, so he decides to
    12·1 answer
  • If a bowling ball rolls 12 meters in 2.2 seconds what is the speed ?
    6·1 answer
  • Investigators studied the effect of temperature on the rate of biological enzyme action. The experimental data is summarized in
    7·2 answers
  • A copper wire of 1-m length and 1-mm radius has a resistance of 5.5 × 10 − 3 [Ω] and carries a current of 4 [A]. The number of f
    12·1 answer
  • Which of the following is a form of energy?
    8·2 answers
  • A modified Atwood machine is at rest. The hanging block has a mass of 3kg. The black on wheels has unknown mass M1. When release
    11·1 answer
  • A 205 kg log is pulled up a ramp by means of a rope that
    12·1 answer
  • Ingrid is moving a box from the ground into the back of a truck. She uses 20 N of force to move the box 5 meters. If she uses an
    11·1 answer
  • The graph below plots the temperature and luminosity of stars on the main sequence. (2 points)
    8·1 answer
  • Helpppppp please!!!!!
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!