By William Shepherd, DAVID William Shepherd

How is the longer term global power call for to be met? The premiums of use of the fossil fuels — coal, oil and average fuel — are expanding world wide. the remainder shares are finite and aren't renewable. this crucial publication considers a number of the suggestions of renewable strength, together with water strength, wind strength and biomass, sun thermal and sunlight photovoltaic strength. and will the nuclear alternative stay open? The ebook examines the environmental implications and financial viability of all fossil and renewable assets, introduces extra far away destiny recommendations of geothermal power and nuclear fusion, and discusses a near-future power process.

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What is the kinetic energy of the motion? If a mass of 10 kg rotates around a circle of 1 m radius at 1800 rpm, what is its energy of motion? 8. 9. 10. 11. An imperial gallon of water is uniformly heated so that its temperature increases by 20◦ C. What is the rise of its heat energy content? Two equal masses of water are mixed in a container. What is the final temperature of the mixture if (a) the two initial temperatures Tin are equal, (b) one mass has an initial temperature twice that of the other?

C) Calculate the instantaneous velocity at the mid-height of the fall. Hint: Use energy balance. (d) Calculate the values of potential energy and kinetic energy at the midheight of the fall. 3. A force of 100 N acts on a mass of 100 kg. (a) What is the resulting linear acceleration? (b) If the steady-state velocity is 10 m/s, what are the values of the kinetic energy and momentum? 4. 5. 6. 7. A mass of 1 kg is rotated in a horizontal circle, at the end of a rigid tie-rod, with an angular velocity of 10 rad/s.

7. A mass of 1 kg is rotated in a horizontal circle, at the end of a rigid tie-rod, with an angular velocity of 10 rad/s. 5 m, what is the instantaneous linear velocity of the mass? Calculate the torque and angular acceleration if a force of 10 N is needed to maintain the rotation. Calculate the moment of inertia of the rotating mass in Qn. 4. 5 m about its fixed anchor point, with an angular velocity of 10 rad/s. What is the kinetic energy of the motion? If a mass of 10 kg rotates around a circle of 1 m radius at 1800 rpm, what is its energy of motion?

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