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
8_murik_8 [283]
3 years ago
6

The ratio of output power to input power, in percent, is called?

Physics
2 answers:
mixer [17]3 years ago
8 0
EFFICIENCY  THATS THE ANSWER 
:)

Harrizon [31]3 years ago
4 0
That's efficiency. There's no law that it must be stated in percent.
You might be interested in
FIRST TO ANSWER CORRECTLY GETS BRAIBLIEST!!
WINSTONCH [101]
Brushes, battery terminals, commutator, armature, magnets
7 0
2 years ago
At some instant and location, the electric field associated with an electromagnetic wave in vacuum has the strength 71.9 V/m. Fi
kirza4 [7]

Answer:

a) Magnetic field strength, B = 2.397 * 10⁻⁷ T

b) Total energy density, U = 4.58 * 10⁻⁸ J/m³

c) Power flow per unit area, S = 13.71 W/m²

Explanation:

a) Electric field strength, E = 71.9 V/m

The relationship between the Electric field strength and the magnetic field strength in vacuum is:

E = Bc where c = 3.0 * 10⁸ m/s

71.9 = B * 3.0 * 10⁸

B = 71.9 / (3.0 * 10⁸)

B = 23.97 * 10⁻⁸

B = 2.397 * 10⁻⁷ T

b) Total Energy Density:

U = \frac{1}{2} \epsilon_0E^2 +  \frac{1}{2} \frac{B^2}{\mu_0} \\U = \frac{1}{2}* 8.85 * 10^{-12}*71.9^2 +  \frac{1}{2} \frac{(2.397*10^{-7})^2}{4\pi*10^{-7}}\\U = 2.29 * 10^{-8} + 2.29 * 10^{-8}\\U = 4.58 * 10^{-8} J/m^3

c)Power flow per unit area

S = \frac{1}{\mu_0} EB\\S = \frac{1}{4\pi * 10^{-7} } * 71.9 * 2.397 * 10^{-7}\\S = 13.71 W/m^2

6 0
3 years ago
An astronaut is in equilibrium when he is positioned 140 km from the center of asteroid C and 581 km from the center of asteroid
serg [7]

Answer:B

Explanation:

Given

Distance of astronaut From asteroid x is r_x=140 km

Distance of astronaut From asteroid Y is r_y=581 km

Suppose M,M_x,M_y be the masses of Astronaut , asteroid X and Y

If the astronaut is in equilibrium then net gravitational force on it is zero

F_x=F_y

\frac{GMM_x}{r_x^2}=\frac{GMM_y}{r_y^2}

cancel out the common terms we get

\frac{M_x}{r_x^2}=\frac{M_y}{r_y^2}

\frac{M_x}{M_y}=(\frac{r_x}{r_y})^2

\frac{M_x}{M_y}=(\frac{140}{581})^2

\frac{M_x}{M_y}=0.05806\approx 0.0581

8 0
3 years ago
Xplain the difference between aerobic and anaerobic exercise and give 1 example of each?
Lilit [14]

Answer:

The term "aerobic" refers to the body's ability to provide energy through the use of oxygen.  The term anaerobic refers to the body's ability to provide energy without the use of oxygen.

An example of an aerobic exercise is swimming. An example of an anaerobic exercise is sprinting.

Explanation:

6 0
3 years ago
Read 2 more answers
Different forms of the same element are called what​
solmaris [256]

Answer:

Allotropes

Explanation:

Because it is the same element the chemical conposition is the same i.e. The atoms that make the substances are identical. Allotropes can be crystalline or amorphous and sometimes they can be varied in properties.

4 0
3 years ago
Read 2 more answers
Other questions:
  • develop an equation with a proportionality constant that describes the relationship between the gravitational force the mass of
    5·1 answer
  • A nuclear power plant generates a total of 150mw of power and 45% of this power is wasted heat that is discharged on the cooling
    14·1 answer
  • When divided by △t, (vf - vi) is used to determine which characteristic? A.Speed B.Direction C. Displacement D.Acceleration
    10·1 answer
  • A car goes from 4.47 m/s to 17.9 m/s in 3 seconds. calculate the acceleration of the car
    11·2 answers
  • Which of these statements about ionising radiation are true:
    14·1 answer
  • A stone is thrown horizontally at 15 m/s from the top of a cliff 40 meters high. How far from the base does the stone hit the gr
    14·1 answer
  • The diagram shows a person using a piece of gym equipment to lift weights.
    6·2 answers
  • An electron is released from rest in a weak electric field given by E,--2.50 x 10.10 N/C j. After the electron has traveled a ve
    7·1 answer
  • Suppose an ice hockey puck strikes a hockey stick that lies flat on the ice and is free to move in any direction. Which
    14·1 answer
  • A golfer takes two putts to sink his ball in the hole. The first putt displaces the ball 6.50 m east, and the second putt displa
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!