Number 6 part a and b 3 m2 m2) What is the work needed to lift 14.7 kg of water from a well 11.0 m deep. Assume the water has a constantupward acceleration of 0.700 m/s².3) The variation of a force with position is shown in the figure below. Find the work from (a) x = 0 to x =-A (b) x = +A to x = 0Fo4) When two 85-kg persons sit in a 1000-kg car, it is lowered by 2 cm. Estimate the spring constant of thesuspension. What simplifying assumptions do you need to make?5) A spring gun with k= 90.0 N/m is compressed by 5 cm. What is the exit speed of a 2.10-g projectile?6) (a) The United States, with a population of 2.2×10* people, consumes 5×10 1º J per year. What is the percapita consumption in watts? (b) The sun's radiation provides the earth with 1000 W/m². Assuming solarenergy can be converted to electrical energy with a 20% efficiency, how much area is needed to serve theenergy needs of each U.S. citizen?7) A 0.595-kg object is released from a height of 3.60 m and lands on the ground. Find: (a) the work ne bygravity; (b) the change in kinetic energy of the ball; (c) the speed just before it lands using energy metnods.Ignore air resistance.Homework #8

Question 6 Given population, P = 2.2× 108 Consume energy, E = 5×1019 per year Sun radiation…

6) (a) The United States, with a population of 2.2×10* people, consumes 5×10 1º J per year. What is the per capita consumption in watts? (b) The sun's radiation provides the earth with 1000 W/m². Assuming solar energy can be converted to electrical energy with a 20% efficiency, how much area is needed to serve the energy needs of each U.S. citizen?

6) (a) The United States, with a population of 2.2×10* people, consumes 5×10 1º J per year. What is the per capita consumption in watts? (b) The sun's radiation provides the earth with 1000 W/m². Assuming solar energy can be converted to electrical energy with a 20% efficiency, how much area is needed to serve the energy needs of each U.S. citizen?

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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