answer.
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
Xelga [282]
2 years ago
7

Which of the following devices would you expect to consume the most energy for each hour that it operates? a portable tape recor

der an electric space heater a desk lamp an electric can openerwhich of the following devices would you expect to consume the most energy for each hour that it operates? the answer is an electric space heater?
Physics
2 answers:
Alisiya [41]2 years ago
8 0

Answer: electric space heater

Explanation: The consumption of electrical energy per unit hour  is given by the power rating on the electrical appliance. The power rating depends on the electric current it withdraws to operate and the resistance of the appliance.

Portable tape recorder, a desk lamp and an electric can opener are small devices as compared to an electric space heater and with draw less current. thus, the power rating of the space heater is higher than other given appliances and it consumes more energy per hour.

Charra [1.4K]2 years ago
3 0
You are correct, the answer is an electric space heater.
The reason for this is because the heating element generates heat by resisting the flow of current. For this reason, other similar devices such as irons take up a large amount of energy as well.
You might be interested in
A wooden piece is made in different shapes take length (l) = radius (r) = 2m Calculate its volume as a:
In-s [12.5K]

This question deals with the volume of different shapes.

a) volume of the sphere is "33.51 m³".

b) volume of the cylinder is "25.13 m³".

a)

The volume of a sphere is given by the following formula:

Volume = \frac{4}{3}\pi r^3\\\\Volume = \frac{4}{3}\pi (2\ m)^3

<u>Volume = 33.51 m³</u>

<u />

b)

The volume of a cylinder is given by the following formula:

Volume = \pi r^2l\\\\Volume =\pi (2\ m)^2(2\ m)

<u>Volume = 25.13 m³</u>

<u />

Learn more about <em>volume </em>here:

brainly.com/question/16686115?referrer=searchResults

The attached picture shows the formulae of the <em>volume</em> of different shapes.

7 0
2 years ago
A balance accurate to one-hundredth of a gram measures the mass of a rock to be 56.10 grams. How many significant digits are in
natali 33 [55]
There are 3 significant didgits
3 0
2 years ago
Read 2 more answers
A 45-mH inductor is connected to an ac source of emf with a frequency of 250 Hz and a maximum emf of 20 V. If the voltage across
ruslelena [56]

Answer:

-20v

Explanation:

Data provided in the question as per the given situation

L = 45 mH

f = 250 Hz

V_o = 20V

Based on the above information, let us assume voltage across inductor be V at t

So,

V = 20 sin (2 \pi \times 250\times t + \frac{\pi}{2})

t = 2 ms

Now

The voltage at time t = 2.0 ms is

V_1 = 20 sin (500\times 2\times 10^{-1} \times \pi + \frac{\pi}{2})

= 20 sin(\pi + \frac{\pi}{2} )

= -20 volt

= -20v

We simply solved the above equation so that the correct voltage could come

5 0
2 years ago
a ball on a string makes 30.0 revolutions in 14.4s, in a circle of radius 0.340m. what is its period.(unit=s)
STALIN [3.7K]

Answer:

0.480 seconds

Explanation:

The period is the time for 1 revolution.  Writing a proportion:

14.4 s / 30.0 rev = t / 1 rev

t = 0.480 s

The period is 0.480 seconds.

7 0
2 years ago
You have been hired to check the technical correctness of an upcoming made-for-TV murder mystery that takes place in a space shu
AlladinOne [14]

Answer:

The astronaut who has a mass of 80 kg without the toolkit do survive with 40 seconds of remaining air

Explanation:

Due the astronaut throws the 10-kg tool kit away with a speed of 8 m/s, it gives a momentum equivalent but in the other direction, so I=mv=(10Kg)(8m/s)=80kg*m/s, then we can find the speed that the astronaut reaches due to its weight we get, v=\frac{I}{m} =\frac{80kg*m/s}{80Kg} =1m/s.

Finally, as the distance to the space shuttle is 200m, the time taken to the astronaut to reach it at the given speed will be t=\frac{d}{v}=\frac{200m}{1m/s}=200s, as the remaining air time is 4 min or 240 seconds, The astronaut who has a mass of 80 kg without the toolkit do survive with 40 seconds of remaining air.

5 0
2 years ago
Other questions:
  • A photon has an energy of 5.53 × 10–17 j. what is its frequency in s–1 (h = 6.63 × 10–34 j • s)?
    6·2 answers
  • A flattened combination of matter containing stars, gas, and dust in spiral galaxy can be identified as
    6·2 answers
  • on the surface of planet x a body with a mass of 10 kilograms weighs 40 newtons. The magnitude of the acceleration due to gravit
    10·2 answers
  • A baseball pitcher throws a ball at 90.0 mi/h in the horizontal direction. How far does the ball fall vertically by the time it
    7·1 answer
  • To hoist himself into a tree, a 72.0-kg man ties one end of a nylon rope around his waist and throws the other end over a branch
    14·1 answer
  • A child is riding a merry-go-round that has an instantaneous angular speed of 1.25 rad/s and an angular acceleration of 0.745 ra
    11·1 answer
  • The oscillating current in an electrical circuit is as follows, where I is measured in amperes and t is measured in seconds. I =
    15·1 answer
  • A person shooting at a target from a distance of 450 metres finds that the sound of the bullet hitting the target comes 1 / 2 se
    5·1 answer
  • Suppose that we are designing a cardiac pacemaker circuit. The circuit is required to deliver pulses of 1ms duration to the hear
    13·1 answer
  • a water heater has a power rating of 1 kW. how many seconds will this heater take to boil 1 liter of water?
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!