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A 0.2 kg conductor of length 0.8 m carries 2 ampere current to the right in a magnetic field. What is the magnitude and the direction of the magnetic field acting on the conductor if the net force on the rod is zero? (Assume that the rod is hung by two insulating supports.)
The greatest ocean depths on the Earth are found in the Marianas Trench near the Philippines. Calculate the pressure due to the ocean at the bottom of this trench
for a piece of material the steady-state flow across its thickness is 0.345x10-3 kgm2 h on the low pressure surface
The net entropy changes when a 26g -ice cube initially at 0? C melts in a room. What is the net entropy change, if room temperature T1=12oC
Identify the action-reaction pairs of forces for the following situations. You step off a curb. You pat your tutor on the back. A wave hits a rocky shore.
A ship travels 50.0 mi on a course of 15 degrees south of east and then travels 85.5mi on a course 60.0 degrees west of south. Find the displacement from its starting point
A 50.0 g copper calorimeter contains 260 g of water at 22.0°C. How much steam ought to be condensed into the water if the final temperature of system is to reach 42.0°C.
The velocity-time graph of part of a cyclist's trip consists of a straight line between v = 24.0 m/s at t = 13.0 s and v = 0 at t = 25.0 s
A set of crash tests consists of running a test car moving at a speed of 11.8 m/s (26.4 mi/hr) into a solid wall. Calculate the size of the average force which acts on the dummy during that time
A mass spectrometer has an adjustable magnetic field. When themagnetic field is 7.000e-2 T, a singly ionized hydrogen atom (a proton) will strike the detector at a particular location. Suppose a triply-ionized carbon 12 atom, whose mass is by defi..
A simple pendulum has a length of 85 cm and a bob of mass 1.2 kg. When the string is at 20 degrees to the vertical. the bob has a speed of 3m/s. What is the maximum angle to the vertical
A factory worker pushes a 30.6kg crate a distance of 4.8m along a level floor at constant velocity by pushing downward at an angle of 31 degrees below the horizontal. What is the total work done on the crate
A 581-{\rm N} physics student stands on a bathroom scale in an 821-{\rm kg} (including the student) elevator that is supported by a cable. Find the magnitude of the acceleration of the elevator
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