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
vovangra [49]
3 years ago
12

A fan that is switched on for 1 minute uses 500 W usefully but also wastes 300 W through the emission of sound and heat. What's

the efficiency of the fan?
Physics
1 answer:
koban [17]3 years ago
6 0

Explanation:

Efficiency is defined as the ratio between the useful output over the total amount consumed. E = \frac{useful}{total}

The fan does 500W of useful work while wasting 300 W. The total power consumption is 800 W (500 + 300).

You might be interested in
A 60.0-kg child takes a ride on a Ferris wheel that rotates four times each minute and has a diameter of 20.0 m. (a) What is the
IrinaVladis [17]

Answer:

3 because

Explanation:

60÷20=3 ans is this

3 0
2 years ago
How to find wavelength
Andrews [41]
If the wavelength<span> is given, the energy can be determined by first using the wave equation (c = λ × ν) to </span>find<span> the frequency, then using Planck's equation to </span>calculate<span> energy. Use the equations above to answer the following questions. 1. Ultraviolet radiation has a frequency of 6.8 × 1015 1/s.</span>
4 0
3 years ago
What part of this equation represents the products? 2NH3 + 4O2?2NO + 3H2O
oee [108]
C.
remember
reactants ----> products
6 0
3 years ago
One of the longer sides of a kite is 39 feet. one of the shorter sides is 25 feet. half the length of the shorter diagonal is 15
pychu [463]
The area of a triangle is found by multiplying the height of the triangle by the length of the base and dividing them both by 2. The length of the shorter side in the equation is useless information, so just multiply 39 by 25 and divide that by 2. A=487.5 sq ft. Also, that's a pretty big kite. 
8 0
3 years ago
The first PCS technology used a form of time division multiplexing called ____.​ a. ​Time Division Multiple Access (TDMA) b. ​Gl
salantis [7]

Answer:

A. Time Division multiple Access (TDMA)

Explanation:

Time-division multiple access (TDMA) is a channel access method for shared-medium networks

It allows several users to share the same frequency channel by dividing the signal into different time slots. The users transmit in rapid succession, one after the other, each using its own time slot.

3 0
2 years ago
Other questions:
  • Formula for potassium phosphate
    14·1 answer
  • A long electric cable is suspended above the earth and carries a current of 345 A parallel to the surface of the earth. The eart
    12·1 answer
  • Which of the following describes a condition in which an individual would not hear an echo?
    12·2 answers
  • Please help me answer this question! Will appreciate help very much. a) Draw a circuit to show 3 lights in series b) Draw a circ
    7·1 answer
  • What Areas employ Forensic psychologists?
    6·1 answer
  • Using what you know about the periodic table, choose all of the correct answers,
    5·1 answer
  • A pulley is able to lift a mass of 25 kg 0.30 m with an applied force of 50 N over a distance of 1.5 m. What is the ideal mechan
    9·1 answer
  • Light____.
    15·2 answers
  • I feel death among us
    15·2 answers
  • A bat produces a sound at 17,250Hz and wavelength 0.019m. What is<br> the speed of the sound?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!