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An electron moves through a uniform magnetic field given by =Bx i +(2.40 Bx) j . At a particular instant, the electron has velocity =(1.92 i +4.61 j ) m/s and the magnetic force acting on it is (3.08 X 10-19 N) k. Find Bx.
Two thin beams are joined end-to-end as shown in the figure to make a single object. What is the gravitational torque on the object
The police at the scene of the accident observed that the point of impact is 120 m from the base of the cliff. Explain how fast was the car traveling when it went over the cliff?
Two wave sources, separatedby 6.00 cm, produce waves - in phase - described by y = 4sin(50πx - 120πt)m. (Assume that these are ripples on thesurface of a pond.) What will be the resultant disturbance (maximum? minimum? something in between?) at a ..
Suzanne observes two light pulses to be emitted from the same location, but separated in time by 2.70 µs. How fast is Mark moving relative to Suzanne
A farsighted person has a near point of 50-cm from her eyes. She wants glasses that would let her see objects at a distance of only 25.00 cm from her eyes. Determine out the focal length of the glasses needed if the glasses are 2 cm and 3 cm from ..
When 1g of natural gas is burned in a stove, about 56kJ ofheat is produced. How much mass is lost in the process
A hot-air balloon is ascending at the rate of 14 m/s and is 98 m above the ground when a package is dropped over the side. How long does the package take to reach the ground
question you are designing a motor cycle. to provide a smooth ride you want the bike to loose energy it acquires from
While a magnet is moved toward the end of a solenoid, avoltage differnce is induced between the two ends of the solenoid wire. The volatage difference would be larger if
Chromium is produced by reacting with its oxide with aluminium. If 304 g of Cr2O3 and 108 g of Al completely react to form 204 g of Al2O3 how many grams of Cr are formed.
Suppose the light bulb in the figure below is replaced with a short wire of zero resistance, and the resistance of the rails is negligible, What is the current in the rod
If John Glenn weighed 640N on Earth's surface, i) how much would he have weighed if his Mercury spacecraft had (hypothetically) remained at twice distance from the center of the Earth? ii) Why is it said that an astronaut is never truly weightless..
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