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
Alenkinab [10]
3 years ago
14

A 0.70kW vacuum cleaner is used for 20 minutes. How much energy does it use? Give your answer in

Physics
2 answers:
sweet-ann [11.9K]3 years ago
7 0

20 minutes = 20/60 = 0.33 hr

0.7 kw * 0.33 hr = 0.231 kWh = 0.23 kWh

Plz mark as Brill

ad-work [718]3 years ago
4 0

Answer:

0.23kw

Explanation:

none

You might be interested in
A 100-kg block being released from rest from a height of 1.0 m. It then takes it 1.40 s to reach the floor. What is the mass m o
dimulka [17.4K]

Complete Question

The complete question is shown on the first uploaded image

Answer:

The mass of the other block is  m_1 = 81.14 \ kg

Explanation:

From the question we are told that

   Mass of the first block is  m_1 = 100 \  kg

   The height is  s =  1.0 \  m

   The time it takes it is  t = 1.40 \  s

 Generally from kinematic equation

       s =  ut + \frac{1}{2} at^2

Here u  is the initial velocity which zero given that it was at rest initially

So

     s =  0 * t + \frac{1}{2} at^2

=>  s =   \frac{1}{2} at^2

=> 1 =   \frac{1}{2}*  a *  (1.40 )^2

=>  a = 1.0204 \  m/s^2

Generally from the diagram the resultant force due to the weight of the first object and the tension on the string is  mathematically represented as

      mg - T = ma

=>   T  =  m g - ma

=>   T  =  m(g - a)

=>   T  =  877.96 \  N

Generally from the diagram the resultant force due to the weight of the second object and the tension on the string is  mathematically represented as  

     T - m_1g  =  m_1 a

=>   877.96  =  m_1 (a + g)

=>   877.96  =  m_1 (1.0204  + 9.8 )

=>   m_1 = 81.14 \ kg

5 0
3 years ago
A car engine changes chemical potential energy into the what energy so the car can move
yuradex [85]
It transforms it to mechanical
7 0
3 years ago
The two forces acting on a boat or some other floating object _______are and gravity​
lubasha [3.4K]

Answer:

The two forces acting on a boat or some other floating object are buoyancy and gravity

7 0
4 years ago
Read 2 more answers
An 8-inch dinner knife is sitting on a circular plate so that its ends are on the edge of the plate. if the minor arc that is in
Makovka662 [10]
When we form a right triangle connecting the edge of the knife to the center of the circle and the center of the knife to the center of the circle, the radius of the circle becomes the hypotenuse. Using the trigonometric function,
                                     sin 60° = opposite / hypotenuse = 4 / hypotenuse
The value of the hypotenuse is 4.62 inches. Then, the diameter is twice this value which is 9.24 inches.
5 0
4 years ago
What would be the weight of the moon if it were resting on the surface of the earth
Natali [406]
73.5 million million million metric tons. or 7.3477 x 10^22 kilograms
8 0
3 years ago
Other questions:
  • If you closely examine a wood screw, you will see that the threads on it form a long _________________ wrapped around a cylinder
    9·2 answers
  • (Will give brainliest) The values of the impulse and the time interval for various collisions are listed in the table. In which
    7·2 answers
  • A point charge of 4.0 µC is placed at a distance of 0.10 m from a hard rubber rod with an electric field of 1.0 × 103 . What is
    6·2 answers
  • A jogger runs the first 1000 meters of a race in 250 seconds. What is the joggers speed
    13·2 answers
  • Choose the letter of the answer that best completes
    5·2 answers
  • If the distance between two masses is doubled, the force between them will be
    14·2 answers
  • Find the weight of a 80 kg man on the surface of the moon? What should be his mass on the moon and the earth? (ge =9.8 m/s2, gm
    14·1 answer
  • When I first joined Brainly i had a problem with drinking​
    13·1 answer
  • person b does twice the work of person a, and in one-half of the time . how does the power output of person b compare to person
    6·1 answer
  • What is the electric field strength between two parallel plates 5cm apart with a potential difference of 25V across them?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!