Answer question 16 showing fully all the steps. Solution should be simplified and easy to understand as much as possible! 13. in the of but the usesii) oil is as a energy source.ii. Biomass and fossil fuels are all what is the origin of these resourcesBiomassi. What is Biomass?14. The power derived from a windmill is given by the equationer - generator is of diameter 0.6 m and given that the efficiency of the system is 25% at awind speed of 13.5 ms!P.o p is the average air density, A, the area of the blade and v, the speed of wind; one such1) Calculate the power output of the aero – generator. Assume that the average air density ja1.2 kgm311) Why is the efficiency of the system less than 40%?11) State and explain one environmental impact depletion of the ozone layer.iv) Name two greenhouse gases15. a) Distinguish between renewable and non - renewable energy sources, giving an example ofcachb) A solar panel delivers power at the rate of 2.0 kW, when the rays of the Sun fall normallyon it. If the solar constant is 1.2 x 10 Wm2 and its efficiency is only 40%. Calculate thearea of the solar panel?16. a) Explain why Cameroon cannot rely on solar energy for its energy needsb) Draw and energy flow diagram for a scheme for which wood is burnt to produce electricalenergy.17. i) A small ship called "THE ESPANGNOLA" needs to enter and berth the Kribi deep sea portin Cameroon. What does the ship captain and his crew need to know about the weather ofKribi?ii) Explain how weather forecasting can be done at a distance?18. a) Draw a cross-section of a hydro-electric power plant.b) Explain the energy changes that take place in the plant.19. Figure 1.11 is an example of a solar panel. Study the diagram carefully and answer thequestions that follow.Sun's RadiationsGlassBlackened PipesFigure 1.11Explain why the solar panel has the following features.a) The pipes are blackenedb) The top of the panel is covered with glass.c) The walls are highly insolated and blackened

Answer:- (13) Fossil fuels are uses to burn coal, gas and oil to produced heat and produce…

rene i1) Explain why oil is described as a non 13. Fossil fuels are used in the generation of electricity, but over hal Biomass i What is Biomass? ii. Biomass and fossil fuels are all energy resources, what is the origin of these resources windmill is given by the equation

rene i1) Explain why oil is described as a non 13. Fossil fuels are used in the generation of electricity, but over hal Biomass i What is Biomass? ii. Biomass and fossil fuels are all energy resources, what is the origin of these resources windmill is given by the equation

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter7: Conservation Of Energy

Section: Chapter Questions

Problem 42P

See similar textbooks

Similar questions

(a) How fast must a 3000-kg elephant move to have the same kinetic energy as a 65.0-kg sprinter running at 10.0 m/s? (b) Discuss how the larger energies needed for the movement of larger animals would relate to metabolic rates.
In Chapter 7, the work-kinetic energy theorem, W = K, was introduced. This equation states that work done on a system appears as a change in kinetic energy. It is a special-case equation, valid if there are no changes in any other type of energy such as potential or internal. Give two or three examples in which work is done on a system but the change in energy of the system is not a change in kinetic energy.
Ignoring details associated with friction, extra forces exerted by arm and leg muscles, and other factors, we can consider a pole vault as the conversion of an athlete’s running kinetic energy to gravitational potential energy. If an athlete is to lift his body 4.8 m during a vault, what speed must he have when he plants his pole?
Give an example of something think of as work in everyday circumstances that is not work in the scientific sense. Is energy transferred or changed in form in your example? If so, explain how this without doing work.
If you run down some stairs and stop, what happens to your kinetic energy and your initial gravitational potential energy?
What does work on a shuffleboard puck as it slides to rest? Why is the board dusted, and how does this affect work?
The person in Figure 7.33 does work on the lawn mower. Under what conditions would the mower gain energy? Under what conditions would it lose energy?
(a) How long will it take an 850-kg car with a useful power output of 40.0 hp (1hp=746W) to reach a speed of 15.0 m/s, neglecting friction? (b) How long will this acceleration take if the car also climbs a 3.00-m-high hill in the process?
A student has the idea that the total work done on an object is equal to its final kinetic energy. Is this idea true always, sometimes, or never? Ii it is sometimes true, under what circumstances? If it is always or never true, explain why.
What is the efficiency of a subject on a treadmill who puts out work at the rate of 100 W while consuming oxygen at the rate of 2.00 L/min? (Hint: See Table 7.5.)
During a stress test of the cardiovascular system, a patient walks and runs on a treadmill, (a) Is the energy expended by the patient equivalent to the energy of walking and running on the ground? Explain, (b) What effect, if any, does tilting the treadmill upward have? Discuss.
(a) Calculate the energy in kJ used by a 55.0-kg woman who does 50 deep knee bends in which her center of mass is lowered and raised 0.400 m. (She does work in both directions.) You may assume her efficiency is 20%. (b) What is the average power consumption rate in watts if she does this in 3.00 min?