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A beam of electrons is moving through a region of space in which there is an electric field of intensity 3.4 x 104 V/m and a magnetic field of 2.0 x 10-3 T. The electric and magnetic fields are so oriented that the beam of electrons is not deflected. The velocity of the electrons is approximately:
a) 1.7 x 107 m/s
b) 6.8 x 106 m/s
c) 3.0 x 108 m/s
d) 6.0 x 10-9 m/s
When the power is turned off on a turntable spinning at 78 rpm, you find that it takes 10.5 revolutions for it to stop while slowing at a constant rate. What is the angular acceleration of the turntable
A constant horizontal force Fa pushes a 2 kg FedEx package across a frictionless floor on which an xy coordinate system has been drawn. It gives package's x and y velocity components versus time t. What is the magnitude of Fa.
question1a two kilogram block is dropped from a height of 0.45m above an incompressible spring. the spring has an
A crying baby emits sound with an intensity of 8 × 10-8 W/m2. What is the intensity level for a set of twins? The lowest detectable intensity is 10-12 W/m2
a block of mass M=46 kg slides down a frictionless inclined plane and collides elastically with another block of mass m=25.0 kg. what is the velocity of m after the collision
In a certain region, the earth's magnetic field has a magnitude of 4.7 x 10-5 T and is directed north at an angle of 42° below the horizontal. Determine the bullet's electric charge
A wire carries a current of 9.0 A in a direction that makes an angle of 35.0° with the direction of a magnetic field, Find the magnetic force on a 6.00 m length of the wire
A copper block is removed from a 310 degrees Celsius oven and dropped into 1.20kg of water at 20.5 degrees Celsius. The water quickly reaches 25.5 degrees Celsius and then remains at that temperature.
Bicyclists in the Tour de France do enormous amounts of work during a race. How much work does he do during a 177-km race in which his average speed is 12.7 m/s
Estimate the fractional error (%) on the left side and on the right side of the equation based on the precision of the available equipment in class: the pulling mass is measured by slotted weights with precision of 10 gram
Two converging lenses (f1 = 9.00 cm and f2 = 6.00 cm) are separated by 18.0 cm. The lens on the left has the longer focal length. Locate the final image relative to the lens on the right
A 77.0 kg man floats in fresh water with 3.00% of his volume above water when his lungs are empty, Calculate the volume of air he inhales--called his lung capacity--in liters
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