Essential University Physics (3rd Edition)
3rd Edition
ISBN: 9780134202709
Author: Richard Wolfson
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Textbook Question
Chapter 29, Problem 66P
Your roommate’s father is CEO of a coal company, so your roommate is understandably skeptical of alternative energy proposals. He claims that there’s no future for solar energy, because the power in sunlight is insufficient to meet humankind’s energy demand. Is he right? To find out, compare the solar power incident on Earth with our human energy consumption rate of about 16 TW.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
In 2014 the Netherlands installed the world’s first solar bike path. Let’s compute the cost of mitigation relative to electricity from coal. Of course, the sidewalk probably wasn’t intended to be a cost-effective electricity option. It's designed for qualitative rather than quantitative value, to raise awareness. However, there are real proposals to scale up this kind of technology to large numbers of sidewalks and roadways, so cost analysis is relevant.
The project cost $3.75 million for ~30kW of installed capacity (based on typical 150W/m2 solar panels). Assume a CCF of 9%, and a utilization of 11% (probably generous for solar panels flat on the ground in the Netherlands). You may ignore all other costs.
Part 1. What is the levelized cost of electricity from the solar sidewalk?
$/kWh
Part 2. What is the cost of mitigation (in $/tCO2) relative to coal electricity at $0.09/kWh and 0.9 kg CO2/kWh. You may assume the solar sidewalk causes 0 kg CO2 emissions/kWh
Our Sun shines bright with a luminosity of 3.828 x 10^26 Watt. Her energy is responsible for many
processes and the habitable temperatures on the Earth that make our life possible.
(a) Calculate the amount of energy arriving on the Earth in a single day.
(b) To how many litres of heating oil (energy density: 37.3 x 10^6
J/litre) is this equivalent?
(c) The Earth reflects 30% of this energy: Determine the temperature on Earth’s surface.
(d) What other factors should be considered to get an even more precise temperature estimate?
Note: The Earth’s radius is 6370 km; the Sun’s radius is 696 x 10^3 km; 1 AU is 1.495 x 10^8 km.
Question 7: Certain areas in Arizona, Nevada, California and Texas can have up to 4000 sunny hours a
year. The fact that these vast lands are less populated and agriculturally not suitable makes them ideal
for solar power plants. Though most commercial solar panels have efficiencies from 15% to 20%,
researchers have now developed solar cells with efficiencies approaching 50%. If you are asked to plant
a solar energy system in these areas using the newest technology, how much land do you need to
produce enough energy for the US.
Make the conservative assumptions that the average light energy landing to the Earth' surface is 1.0
cal/(cm2 min).
An estimate for the US energy consumption by major sources is given below.
U.S. primary energy consumption by major sources, 1950-2019
quadrillion British thermal units
110
100
90
80
70
60
50
40
30
20
10
1950
1955
1960
1965
1970
1975
1980
1985
1990
1995
2000
2005
2010
2015
renewables
nuclear
petroleum
natural gas
coal
Chapter 29 Solutions
Essential University Physics (3rd Edition)
Ch. 29.2 - Would you expect to find a magnetic field between...Ch. 29.5 - Prob. 29.3GICh. 29.6 - Prob. 29.4GICh. 29.7 - Prob. 29.5GICh. 29.8 - Lasers 1 and 2 emit light of the same color, and...Ch. 29 - Why is Maxwells modification of Ampres law...Ch. 29 - Prob. 2FTDCh. 29 - Is there displacement current in an...Ch. 29 - Prob. 4FTDCh. 29 - Prob. 5FTD
Ch. 29 - When astronomers observe a supernova explosion in...Ch. 29 - Turning a TV antenna so its rods point vertically...Ch. 29 - The Sun emits about half of its...Ch. 29 - An LC circuit is made entirely from...Ch. 29 - Prob. 10FTDCh. 29 - The intensity of light drops as the inverse square...Ch. 29 - Electromagnetic waves dont readily penetrate...Ch. 29 - Prob. 13ECh. 29 - Prob. 14ECh. 29 - The fields of an electromagnetic wave are E = Ep...Ch. 29 - A radio waves electric field is given by the...Ch. 29 - A light-minute is the distance light travels in 1...Ch. 29 - Your intercontinental telephone call is carried by...Ch. 29 - An airplanes radar altimeter works by bouncing...Ch. 29 - Roughly how long does it take light to travel 1...Ch. 29 - If you speak via radio from Earth to an astronaut...Ch. 29 - What are the wavelengths of (a) a 100-MHz FM radio...Ch. 29 - A 60-Hz power line emits electromagnetic...Ch. 29 - Microwave ovens for consumers use operate at 2.45...Ch. 29 - Prob. 25ECh. 29 - Prob. 26ECh. 29 - Vertically polarized light passes through a...Ch. 29 - Prob. 28ECh. 29 - Prob. 29ECh. 29 - Estimate the peak electric field inside a 1.1-kW...Ch. 29 - Prob. 31ECh. 29 - Prob. 32ECh. 29 - Your university radio station has a 5.0-kW radio...Ch. 29 - Prob. 34PCh. 29 - Youre engineering a new cell phone, and youd like...Ch. 29 - Prob. 36PCh. 29 - The medical profession divides the ultraviolet...Ch. 29 - Prob. 38PCh. 29 - Prob. 39PCh. 29 - A polarizer blocks 75% of a polarized light beam....Ch. 29 - Prob. 41PCh. 29 - Unpolarized light of intensity S0 passes first...Ch. 29 - Prob. 43PCh. 29 - Prob. 44PCh. 29 - High microwave intensities can cause biological...Ch. 29 - Use the fact that sunlight intensity at Earths...Ch. 29 - A quasar 10 billion light-years from Earth appears...Ch. 29 - Prob. 48PCh. 29 - Prob. 49PCh. 29 - Find the peak electric and magnetic fields 1.5 m...Ch. 29 - A typical fluorescent lamp is a little more than 1...Ch. 29 - Prob. 52PCh. 29 - A laser produces an average power of 7.0 W in a...Ch. 29 - Prob. 54PCh. 29 - A 65-kg astronaut is floating in empty space. If...Ch. 29 - Prob. 56PCh. 29 - A white dwarf star is approximately the size of...Ch. 29 - Use appropriate data from Appendix E to calculate...Ch. 29 - Prob. 59PCh. 29 - Prob. 60PCh. 29 - In a stack of polarizing sheets, each sheet has...Ch. 29 - Prob. 62PCh. 29 - Prob. 63PCh. 29 - Maxwells equations in a dielectric resemble those...Ch. 29 - Prob. 65PCh. 29 - Your roommates father is CEO of a coal company, so...Ch. 29 - The Voyager I spacecraft is now beyond the outer...Ch. 29 - Prob. 68PCh. 29 - Prob. 69PCh. 29 - The table below shows the intensity of the radio...Ch. 29 - If a sunlight-powered sailing spacecraft...Ch. 29 - Prob. 72PPCh. 29 - A sail capable of propelling a spacecraft to the...Ch. 29 - Prob. 74PP
Additional Science Textbook Solutions
Find more solutions based on key concepts
EXERCISE H Return to the Chapter-Opening Question. page 18, and answer it again now.
Try to explain why you may...
Physics for Scientists and Engineers with Modern Physics
Unreasonable Results A surveyor 100 m from a long straight 200-kV DC power line suspects that its magnetic fiel...
College Physics
Choose the best answer to each of the following. Explain your reasoning. Which of these star clusters is younge...
The Cosmic Perspective Fundamentals (2nd Edition)
The Sun is approximately 6000 K at the surface and has an energy distribution that peaks at visible wavelengths...
Lecture- Tutorials for Introductory Astronomy
Calculate the average volume per molecule for an ideal gas at room temperature and atmospheric pressure. Then t...
An Introduction to Thermal Physics
The pV-diagram of the Carnot cycle.
Sears And Zemansky's University Physics With Modern Physics
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.Similar questions
- you are standing 2.5 m from a 150-W lightbulb. If the pupil of your eye is a circle 5.0 mm diameter, how much energy enters your eye per second? (assume 5.0% of the lightbulb's power is converted to light)arrow_forwardSuppose a battery operates a 2.25 W electric clock for 19.5 months. 1. What is the available energy content, in joules, of the battery? 2. How many years can a battery that supplies 7.75 × 104 J run a pocket calculator that consumes energy at the rate of 1.05 × 10-3 W?arrow_forwardOrbital plane change: A satellite is launched due east from the Kennedy Space Center (latitude 28.6º). Following orbit insertion and a circularizing second burn with no plane change, the satellite is in a circular orbit at an altitude of 540 km. Its final destination is a circular orbit at 15,000 km with an inclination of 0 degrees. a. Using two Hohmann transfers, what total Δv is required to move the satellite from the initial orbit to the higher circular at the same inclination? Include a sketch showing the initial orbit, the transfer orbit and the final orbit. Include the location(s) of the burn(s). b. Calculate the Δv required to change the orbital inclination from its initial value to zero degrees in both the initial circular orbit and the higher circular orbit. Where would you want to make the change to the orbital inclination?arrow_forward
- Consider a charge of size +3.8 x 10-4 C and mass 8 kg is traveling to the left towards a +1.7 x 10-4 C charge with speed 119 m/s. The +1.7 x 10-4 C charge is so massive that it does not recoil in response to the repulsion of the approaching charge. Calculate how close the two charges get, in m. Use k = 9 x 109 N m2 / kg2. (Please answer to the fourth decimal place - i.e 14.3225)arrow_forwardOur Sun shines bright with a luminosity of 3.828 x 1026 Watt. Her energy is responsible for many processes and the habitable temperatures on the Earth that make our life possible. (a) Calculate the amount of energy arriving on the Earth in a single day. (b) To how many litres of heating oil (energy density: 37.3 x 106 J/litre) is this equivalent?arrow_forwardOur atmosphere provides us with some degree of shielding from cosmic radiation. Suppose shielding efficiency is approximately proportional to the shield material’s density. What depth of water will provide the same shielding as the Earth’s atmosphere? (Hint: the pressure at the surface of the Earth is 1 atm.)arrow_forward
- I am confused as to why "A distance 2h/3 above the floor" is the answer. Did it use the law of conservation of energy: 1/2mvi^2+mgh+1/2kxi^2+Wnc=1/2mvf^2+mgh+1/2xf^2? I was somehow able to answer and come up with an answer: 2h/3 a distance 2h/3 above the floor. However, I am not sure if I did the right thing. mgh + Wnc = mghf mgh/3 + mgh = mghf 2mgh/3 =mghf 2h/3 = hfarrow_forwardYou are serving as an expert witness for the city council of a community. The council is exploring the concept of providing the electrical needs of the community by building a facility with photovoltaic cells to convert sunlight to electric potential energy. But they are facing resistance from members of the community, who claim that there is not enough open land in the community to build such a facility. The opposition is building toward a lawsuit, which the city council wants to avoid. The community requires 2.20 MW of power, and the best photovoltaic cells on the market at the time have an efficiency of 30.0%. In your community, an average intensity of sunlight during the day is 1,030 W/m2. The council members have no idea how much land is needed, so they have asked you to estimate the area of land (in m2) that must be found to construct this facility. (Assume the given average intensity of sunlight is only available for eight hours a day.)arrow_forwardYou are serving as an expert witness for the city council of a community. The council is exploring the concept of providing the electrical needs of the community by building a facility with photovoltaic cells to convert sunlight to electric potential energy. But they are facing resistance from members of the community, who claim that there is not enough open land in the community to build such a facility. The opposition is building toward a lawsuit, which the city council wants to avoid. The community requires 2.00 MW of power, and the best photovoltaic cells on the market at the time have an efficiency of 30.0%. In your community, an average intensity of sunlight during the day is 1,190 W/m2. The council members have no idea how much land is needed, so they have asked you to estimate the area of land (in m2) that must be found to construct this facility. (Assume the given average intensity of sunlight is only available for eight hours a day.) 5602.52 Remember that sunlight is not…arrow_forward
- Assume 1 serving of fried chicken is 320 calories. Consider that a food calorie is equal to about 4 kJ of energy, how much energy in a serving size of the fried chicken compares in other situations. For example, how does this compare to the amount of energy that's necessary to lift a fully-loaded pickup truck up three meters above the ground? Let's say the truck has a mass of 2500 kg. Create a Energy-Interaction Model, and determine how much energy is necessary to lift the truck.arrow_forwardUranium-238 (U238) has three more neutrons than uranium-235 (U235). Compared to the speed of sound in a bar of U235, is the speed of sound in a bar of U238 higher, lower, or the same? There are several factors that play a role. (a) Chemically, the atoms of these two isotopes behave in essentially identical ways, since the number of protons (92) is identical and the clouds of 92 electrons are nearly identical. The interatomic distance, and the effective "stiffness" of the interatomic bond, both depend on the chemical properties of the atoms. Therefore, which of the following statements are true? O The effective stiffness of the interatomic "spring" is the same in the two isotopes, since this "spring" is a model for the interactions of the outer electrons, which are the same for different isotopes of the same atom. V The effective stiffness of the interatomic "spring" is greater for U238 because the mass is greater. V The interatomic distance is the same for the two isotopes, because it…arrow_forwardOn Dec 5, 2022, scientific history was made at the Lawrence Livermore National Laboratory (LLNL) in Livermore, California when nuclear fusion was achieved when the 192 lasers deposited about 2 Megajoules (MJ) of energy into a frozen pea sized deuterium-tritium pellet and ignited the pellet through nuclear fusion to release 3 MJ of energy. The metric prefix mega means million (10^6). a) How much mass (kg) would be required to release 1 MJ of energy?arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- College PhysicsPhysicsISBN:9781305952300Author:Raymond A. Serway, Chris VuillePublisher:Cengage Learning
College Physics
Physics
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Cengage Learning
What Are Electromagnetic Wave Properties? | Physics in Motion; Author: GPB Education;https://www.youtube.com/watch?v=ftyxZBxBexI;License: Standard YouTube License, CC-BY