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1. The Hoover Dam hydroelectric power plant has 17 hydroelectric turbines that were installed between 1936 and 1961. Today, the hydroelectric power plant has a total rated capacity of 2,080 MW and generates 4.2 TWh of electricity annually. Assume the plant has an availability of 98%. What is the capacity factor of the hydroelectric power plant (%)?
2. The United States currently generates approximately 4100 TWh of electricity annually. By the year 2030, advocates of wind energy have proposed that at least 20% of the national electricity usage be generated by wind energy. Currently, the installed wind turbines in the US account for a total of 60,000 MW of rated capacity. Assume the average wind turbine has a rated capacity of 2 MW, a capacity factor of 25%, and occupies 0.2 km2 of land. How much electricity is currently generated by wind energy each year (MWh/yr)?2a.
Assuming energy usage remains the constant through 2030, what is the total rated capacity of wind energy needed to generate 20% of the electricity in the US (MW)?
You are supposed to make a Rube Goldberg machine that releases a block on an inclined plane that has a length of 2.50m and is supposed to take 15.5 seconds to travel that distance.
Assuming a mass density of 3.5 g/cm^3 for rock and 1 g/cm^3 for ice, calculate the radius of the rocky core for each of the galilean satellites with complete differentiation
A 2.0-kg mass moving at 5.0 m/s suddenly collides head-on with a 3.0-kg mass at rest. What is the speed of the masses just after the collision
A 3.00kg mass is pushed against a horizontal spring of force constant 23.0N/cm on a frictionless air table. What is the greatest acceleration of the mass
A 1200 kg frictionless roller coaster starts from rest at a height of 22 m. What is its kinetic energy when it goes over a hill that is 13 m high
The drawing shows four insulated wires overlapping one another, forming a square with 0.050-m sides. All four wires are much longer than the sides of the square. The net magnetic field at the center of the square is 72 μT directed into the drawing..
Block 1, of mass m_1 = 0.500 kg, is connected over an ideal (massless and frictionless) pulley to block 2, of mass m_2. Suppose that the blocks accelerate with an acceleration of magnitude a = 0.550 m/s^2 and that coefficient of kinetic friction b..
A sample containing beryllium (atomic mass 9 u), aluminum (27 u), and an unknown element is placed in a mass spectrometer. What is the mass of the unknown element
A converging lens with a diameter of 26.00 cm forms an image of a satellite passing overhead. The satellite has two green lights (wavelength 500 nm) spaced 1.24 m apart.
If a 68.3 kg person were travelling at 0.960c (where c is the speed of light), what would be the ratio of the person's actual kinetic energy to the person's classical kinetic energy
2 parallel straight wires are 9.0 cm apart and each caries a 10.0 a current in the same direction. one wire is securely
An unknown capacitor is charged by a 100-V source through a 1 M? resistor. determine the capacitance of the capacitor
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