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NikAS [45]
3 years ago
6

8. A meter reader determines that a business has used 5000 kW.h of energy in 4 months. If

Physics
1 answer:
ladessa [460]3 years ago
7 0

Answer:

ENERGY AND COST. One kllowatt hour is 1,000 watts of power for one hour of time. ... Determine power: P = V XI ... Calculate the total kilowatt hours used. ... If the electric costs are 150 per kWh, how much does it cost to run the refrigerator in ... 8. A room was lighted with three 100-watt bulbs for 5 hours per day. If the cost of.

Explanation:

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5. Two charged spheres are separated by
soldier1979 [14.2K]

Answer:C

Explanation:

3 0
4 years ago
A weightlifter raises a 200-kg barbell with an acceleration of 3 m/s^2. How much force does the weightlifter use to raise the ba
lesya692 [45]

F = mass x acceleration

We have mass = 200kg

and acceleration = 3 m/s^2 so...

F = (200)(3)

F = 600 N

4 0
3 years ago
Describe the relationship between amperage, voltage, and, as well as resstance.
Nikolay [14]

Answer:

I=\frac{V}{R}

Explanation:

Ohms law says that the current in the conductor between the two points is directly related or directly proportional to the voltage by keeping a proportionality of constant which is called resistance.

Mathematically Ohms law can be written as,

I=\frac{V}{R}

Here, I is the current measure in ampere or amperage, V is voltage measure in voltage and R is resistance measure in Ohm.

Now the relation between the amperage, voltage and resistance will be,

I=\frac{V}{R}

Amperage=Voltage/Resistance

5 0
4 years ago
S Two astronauts (Fig. P 11.55 ), each having a mass M , are connected by a rope of length d having negligible mass. They are is
jek_recluse [69]

The new rotational energy of the system(RE) = mv^{2}

How this is calculated?

  • Distance of each astronaut from centre of mass(m)=d/2

  • Moment of inertia of system

          I=m(\frac{d}{2} )^{2}+ m(\frac{d}{2} )^{2}\\   I =\frac{md^{2} }{2}

  • Speed of astronauts=v

  • So, angular speed,ω =  \frac{v}{d/2}

                                         =\frac{2v}{d}

  • Rotational energy of system= \frac{1}{2}  I \omega^{2}

                where, ω= angular speed

               RE=\frac{1}{2} *\frac{md^{2} }{2}*(\frac{2v}{d})^{2} \\RE     =mv^{2}

What is rotational energy?

  • Rotational energy or angular kinetic energy is kinetic energy due to the rotation of an object and is part of its total kinetic energy.
  • Looking at rotational energy separately around an object's axis of rotation, the following dependence on the object's moment of inertia is observed

To know more about rotational energy , refer:

brainly.com/question/13623190

#SPJ4

7 0
2 years ago
A meteor is falling towards the earth. If the mass and the radius of the earth are 6×10^24kg and 6.4×10^3km respectively,find th
Klio2033 [76]

Answer:

h = 3600 km

Explanation:

Given,

The mass of the Earth, M = 6 x 10²⁴ km

The radius of the Earth, R = 6.4 x 10³ km

The acceleration of the meteor at height, x = 4 m/s²

The acceleration due to gravity at the surface of the Earth is given by the formula,

                                    g = GM/R²

At height 'h' acceleration is given by the formula,

                                     gₓ = GM/Rₓ²

                                    Rₓ² =  GM/gₓ

                                          = 6.673 x 10⁻¹¹ X 6 x 10²⁴ / 4

                                          = 1 x 10¹⁴

                                       Rₓ = 1 x 10⁷ m

Where,

                                  Rₓ = R + x

                                   x = Rₓ - R

                                        = 10000 km - 6400 km

                                        = 3600 km

Hence, the height of the meteor where its acceleration due to gravity is 4 m/s² is, h = 3600 km

4 0
4 years ago
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