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how many square meters of pv would it take to provide 1 kw for a world population of 6 billion if these cells were
a person who weighs 605 n is riding a 98-n mountain bike suppose the entire weight of the rider and bike is supported
a solid concrete block weighs 150 n and is resting on the ground its dimensions are 0400 m 0200 m 0100 m a number of
a commercially available solar cell module puts out 3volts and 01 amp and measures 5cm by 8cm how large an array is
a gold prospector finds a solid rock that is composed solely of quartz and gold the mass and volume of the rock are
a weight w is supported by attaching it to a vertical uniform metal pole by a thin cord passing over a pulley having
if the solar cells use have an efficiency of 10 what area of land is needed to produce an output of 1000 mw assume that
a block of wood 10 cm by 10 cm by 40 cm with mass 32 kg and uniform density stands on its end on level ground in the
consider the arrangement of ideal massless cables and a 450cm long 10kg horizontal iron bar which are used to hang a
if a commiercial solar cell with a maximum output of 2 amps at 05v costs 30 what will be the cost of a photovoltaic
a right triangular plate with height 4 ft and a base of 6 ft is submerged vertically in water so that the top is 2 ft
a 90-tonne 1 t 1000kg spacecraft moving in the positive x-direction at 048 ms docks with a 75-tonne craft moving in
a 130g ball moving at 035 ms in the positive x-direction is subject to a 015 n force in the negative y-direction for 25
prove that any ray coming in parallel to the principal axis of a parabolic surface will reflect towards the focal point
an air-filled parallel-plate capacitor has a capacitance of 15 pf the separation of the plates is doubled and wax is
the space between two concentric conducting spherical shells of radii b 240 cm and a 120 cm is filled with a
two rigid rods are oriented parallel to each other and to the ground the rods carry the same current in the same
a 165 m length of wire is formed into a single-turn square loop in which there is a current of 12 a the loop is placed
a laser beam 6320 nm is incident on two slits 0280 mm apart how far apart are the bright interference fringes on a
a 111 10-3 microf capacitor has an initial charge of 0100 c when a resistor is connected across the capacitor plates
capacitors wont hold a charge indefinitely as time goes on charge gradually migrates from the positive to the negative
a capacitor constructed of two metal plates which are 160 cm long and 4 cm wide they are separated by a distance fo 02
a golfer driving a golf ball off the tee gives the ball a velocity of 31 ms the mass of the ball is 0045 kg and the
a piece of nichrome wire has a radius of 700 10-4 m it is used in a laboratory to make a heater that dissipates 300 102
a crate of mass m1 on a frictionless inclined plane is attached to another crate of mass m2 by a massless rope the rope