Book edition 1st Edition

Author(s) Paul Peter Urone

Pages 1272 pages

ISBN 9781938168000

Answers without the blur.

Just sign up for free and you're in.

Short Answer

What is the cost of operating a 3.00-W electric clock for a year if the cost of electricity is $0.0900 kW.h?

The cost of operation electric clock for a year is $2.37.

See the step by step solution

Step by Step Solution

TABLE OF CONTENTS :

TABLE OF CONTENTS

Power

Power is defined as the rate at which energy is expended.

The power is defined as,

$P = \frac{E}{T}$ (1.1)

Here, E is the energy consumed and T is the time.

Rearranging equation (1.1) in order to get an expression for the energy consumption,

E=PT (1.2)

The commercial unit of energy is kilowatt-hour (kW.h).

Find the cost of operation electric clock for a year

The energy consumption of an 3.00-W electric clock in a year can be calculated using equation (1.2).

Putting all known values in equation (1.2),

$\begin{aligned}E &= \left( {3.00{\rm{ W}}} \right) \times \left( {1{\rm{ year}}} \right)\\ &= \left( {3.00{\rm{ W}}} \right) \times \left( {\frac{{1{\rm{ kW}}}}{{1000{\rm{ W}}}}} \right) \times \left( {1{\rm{ year}}} \right) \times \left( {\frac{{365{\rm{ day}}}}{{1{\rm{ year}}}}} \right) \times \left( {\frac{{24{\rm{ h}}}}{{1{\rm{ day}}}}} \right)\\ &= 26.28{\rm{ kW}} \cdot {\rm{h}} \end{aligned}$

Since, the cost of electricity is $0.0900 per kW.h. Therefore, cost of operation of an electric clock for a year is,

$\begin{aligned}{\rm{Cost}} = {\rm{Rate}} \times E \end{aligned}$

Putting all known values,

$\begin{aligned}{\rm{Cost}} &= \left( {\$ 0.0900{\rm{ per kW}} \cdot {\rm{h}}} \right) \times \left( {26.28{\rm{ kW}} \cdot {\rm{h}}}\right)\\\approx \$ 2.37\end{aligned}$

Therefore, the required cost of operation electric clock for a year is $2.37.

Find Study Materials for

Create Study Materials

Select your language

College Physics (Urone)

Answers without the blur.

Short Answer

What is the cost of operating a 3.00-W electric clock for a year if the cost of electricity is $0.0900 kW.h?

Step by Step Solution

Power

Find the cost of operation electric clock for a year

Most popular questions for Physics Textbooks

Want to see more solutions like these?

Recommended explanations on Physics Textbooks

Select your language

College Physics (Urone)

Answers without the blur.

Short Answer

What is the cost of operating a 3.00-W electric clock for a year if the cost of electricity is $0.0900 kW.h?

Step by Step Solution

Power

Find the cost of operation electric clock for a year

Most popular questions for Physics Textbooks

Want to see more solutions like these?

Recommended explanations on Physics Textbooks

Work Energy and Power

Radiation

Astrophysics

Physics of Motion

Scientific Method Physics

Fluids

Torque and Rotational Motion

Nuclear Physics

Fields in Physics

Measurements

Space Physics

Electricity

Physical Quantities and Units

Medical Physics

Electrostatics

Further Mechanics and Thermal Physics

Mechanics and Materials

Engineering Physics

Energy Physics

Force

Particle Model of Matter

Waves Physics

Magnetism

Modern Physics

Atoms and Radioactivity

Dynamics

Electricity and Magnetism

Conservation of Energy and Momentum

Fundamentals of Physics

Kinematics Physics

Circular Motion and Gravitation

Linear Momentum

Rotational Dynamics

Oscillations

Translational Dynamics

Geometrical and Physical Optics

Thermodynamics

Magnetism and Electromagnetic Induction

Electromagnetism

Electric Charge Field and Potential

Turning Points in Physics