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If the PV cells have an efficiency of 10%, what area of land is needed to produce and electrical output of 1000 MW (megawatt)? Assume the average insolation (we learned this in a previous chapter) is 500 W/m2. Give your answer in square meters and square kilometers.
In a rear-end collision the automobile that is accelerated to a velocity V in 0.01 s. What is the minimum velocity at which there is danger of neck fracture from whiplash?
Take two containers, each with volume 0.1 m3, containing ideal gases of monatomic He at T= 104 K and diatomic N2 at T = 236 K, What is the change of dimensionless entropy solely due to the fact that the gases have more volume accessible
The oscillator of Problem 3-1 is set into motion by giving it an initial velocity of 1 cm/s at its equilibrium position. Calculate- The maximum displacement
A 3 kg block is set into motion up an inclined plane of 30 degrees with an initial speed of 8 m/s. what is the frictional force exerted on the block
A 3800kg truck is parked on a 12 degree slope. How big is the friction force on the truck
A spring is attached to an overhead beam. If you put a mass of 17 0 g on it, and it proceeds to stretch a distance of 7 cm, What is the magnitude of the downward acceleration
Two forces, F1 and F2, act at a point. F1 has a magnitude of 9.80 Newton and is directed at an angle of 60 degree above the negative x axis in the second quadrant. Determine what is the x component of the resultant force
A satellite has a mass of 95 kg and is located at 1.99 106 m above the surface of Earth. What is the magnitude of the gravitational force on the satellite
Compute the intrinsic carrier concentration for PbTe at room temperature.
A real battery is not just an emf. We can model a real 1.5v battery as a 1.5v emf in series with a resistor known as the "internal resistance", What is the potential difference between the terminals of the battery
Write the matrix, in the basis of the vectors |φ1φ2>, which represents the density operator p(0) corresponding to the ket |ψ(0) given in b. What is the density matrix p(t) at time t? Calculate, at the instant t = 0, the partial traces: Consider a sys..
A rocket is out in space, far away from any planet. At a certain time, it has a mass of 2.8 x 105 kg, most of which is fuel. what is the new mass of the rocket
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