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A wire of nichrome of length 80cm has a resistance of 50 ohms. if the wire is four folded, find new resistance.
a tennis ball bouncing on a hard surface compresses and then rebounds. the details of the rebound are specified in
An ice-making machine operates in a Carnot cycle. It takes heat from water at 0.0°C and rejects heat to a room at 22.5°C. How much heat is discharged into the room
The center of mass for a 1 meter stick is at 49.7cm when placed on an fulcrum. Calculate the net clockwise torque on the meter stick
A thin glass (n = 1.47)converging lens for which the radii of curvatureare R1 = 15.0 cmand R2 = -13 cm. Determine the area of this image
The small piston of a hydraulic lift has a diameter of 8.70 cm , and its large piston has a diameter of 44.0 cm. Determine the pressure applied to the fluid in the lift
In one of the original Doppler experiments a tuba was played on a moving flat train car at a frequency of 75 hz, What beat frequency was heard if the train car approached the station at a soeed of 10m/s
A square conducting loop is in a region of uniform, constant magnetic field. Can the loop be rotated about an axis along one side and no emf be induced in the loop? Discuss, in terms of the orientation of the rotation axis relative to the magnetic..
A 540-W space heater is designed for operation in Germany, where household electric outlets supply 230 V (rms) service. What is the power output of the heater when plugged into a 120-V (rms) outlet in a house in the United States?
A helicopter is rising at 4.60 m/s when a bag of its cargo is dropped. The bag falls for 2.50 s. (suppose that the positive direction is upward.)
a block on a spring is pulled ot the right and released at t 0 s.it passes x 3.1cm at t 0.685s and it passes x
Three identical thin rods, each of length L and mass m, are welded perpendicular to one another as shown in the figure below. The assembly is rotated about an axis that passes through the end of one rod and is parallel to another. Determine the mom..
A toy car of mass 1.0 kg is stationary, and a child rolls a toy truck of mass 4.7 kg straight toward it with a speed of 3.2 m/s. What is the velocity of the center of mass of the system consisting of the two toys
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