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In a mall, a shopper rides up an escalator between floors. At the top of the escalator, the shopper turns right and walks 9.41 m to a store. The magnitude of the shopper's displacement from the bottom of the escalator to thestore is 16.0 m. The vertical distance between the floors is4.57 m. At what angle is the escalatorinclined above the horizontal?
Two wires are identical, except that one is silver (resistivity = 1.59×10-8 ?·m) and the other is platinum (resistivity = 1.06×10-7 ?·m). The silver wire has resistance of 1.56 m?. What is the resistance of the platinum wire?
A wheel of radius 30 cm is rotating at a rate of 2.0 revolutions every 0.080 s. What is the wheel's frequency of rotation
question1as at rest two trains has sirens that release a frequency of 300 hz. the trains travel toward one another and
A helium-neon laser emits light of wavelength 632.8 nm and has a power output of 2.0 mW. How many photons are emitted per second by this laser
Three resistors, 28, 48, and 80 ?, are connected in series, and a 0.53-A current passes through them. What is the potential difference across the three resistors
question1a 1201.0 n uniform boom of length l is supported by a cable. the boom is pivoted at the bottom the cable is
A generating station is producing 2.00 106 W of power that is to be sent to a small town located 8.0 km away. Find the power used to heat the wires if the power is transmitted at 1300 V
By how much will the earth slow down if its two ice caps melt. Find out how much water the two ice caps contain
A step-up transformer has 24 turns on the primary coil and 780 turns on the secondary coil. what input current and voltage are needed
A bird feeder in the shape of a 50-cm-diameter disk of mass 340 g, suspended by a wire with torsional constant 5.00N?m/rad, What is the mass of the birds, assuming they have the same mass
A positive charge of +q1 is located 5.35 m to the left of a negative charge -q2. The charges have different magnitudes. On the line through the charges, the net electric field is zero at a spot 2.95 m to the right of the negative charge. On this line..
An engineer is given the job of designing the water system for a tall building. He decides to locate the pumps at ground level and feed the entire building from there. what must the pressure be at pump level
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