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
N76 [4]
2 years ago
14

A heater marked 2000W/3000W is switched on for 4 hours. For the first hour it is on the highest setting and for the last 3 hours

it is on the lowest setting
1.1 How much energy does it transfer to the room in kWh (9kWh)
​
Physics
1 answer:
Leni [432]2 years ago
3 0

Answer:

9 kW-hr

Explanation:

3000 W  = 3 kW          for 1 hr =    <u>3 kW - hr </u>

2000 W  = 2 kW          for 3 hr =  <u> 6 kW -hr</u>

<u />

total power =  <u> 3 + 6 = 9 kW-hr</u>

You might be interested in
A single polarizer will stop _____ of the incoming light.
True [87]
A single polarizer will stop 50% of the incoming light.
8 0
3 years ago
Read 2 more answers
Which statement correctly describes the relationship between the volume of a gas and its temperature, in Kelvin, assuming pressu
nekit [7.7K]

The relationship is directly proportional; as temperature increases, volume increases in the same way.

Charles's law states that at a constant pressure, the volume of fixed a mass of a gas is directly proportional to its absolute temperature or kelvin temperature.

Mathematically, this law can be written as follows;

V = kT\\\\where;\\k \ \ is \ a \ constant \\\\T \ is \ kelvin \ temperature\\\\V \ is \ the \ volume \ of \ the \ gas

This law explains the direct relationship between Volume of the gas and its Kelvin temperature. That is, as Temperature increases, the volume of the gas increases.

Thus, the correct statement is "The relationship is directly proportional; as temperature increases, volume increases in the same way".

Learn more here: brainly.com/question/16927784

5 0
3 years ago
Two security professionals - Jo and Chris - are discussing the contracting process.
UNO [17]
Eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee
5 0
3 years ago
Now far is it to the moon?
diamong [38]
<span>238,900 mi hope it helps :)</span>
8 0
3 years ago
Read 2 more answers
A car accelerates from rest at 3.00 m/second squared What is the velocity after 5 secs ? What is the displacement after 5 second
andrey2020 [161]

Explanation:

after 5 seconds, the velocity is (5s)(3m/s²) = 15m/s

The displacement after 5s is

x=vo + (1/2)at²

x = 0 + (1/2)(3m/s²)(5s)(5s)

x= 37.5 m

3 0
3 years ago
Other questions:
  • Spring balance measures weight, not the mass of a body.​
    9·1 answer
  • Niagara Falls is a set of very large waterfalls located on the border between New York and Ontario, Canada. Over 200,000 cubic f
    11·2 answers
  • Okay I better get a good answer for this guy I'm puttin' all my money on it.
    9·2 answers
  • Electromagnetic waves are not mechanical waves, which means they can<br> travel in a:
    13·1 answer
  • Why are many scientists concerned about humans adding large amounts of carbon to the atmosphere by burning fossil fuels (combust
    5·2 answers
  • A distant galaxy has a redshift z = 5.82 and a recessional velocity vr = 287,000 km/s (about 96% of the speed of light.) Notice
    10·1 answer
  • Can someone help me find the answer?
    11·2 answers
  • Calculate ine gravitational potential energy of the ball using pe=m×g×h.(use g=9.8 n/kg)
    15·1 answer
  • Hypothesis (5 points)
    8·1 answer
  • The __________________ is a network of cells and fibers that send messages to different parts of the body.
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!