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Crossed magnetic and electric fields are established over a certain region. The magnetic field is 0.40 T vertically downward. The electric field is 7.0 x 106 V/m horizontally east. An electron, traveling horizontally northward, experiences zero net force from these fields and so continues moving in a straight line. Find what is the electron speed?
m/s
A small object is placed to the left of a convex lens and on its optical axis. The object is 30 cm from the lens, which has a focal length of 48 cm. Describe the nature of this new image
Consider the mass spectrometer shown schematically in the figure below. The electric field between the plates of the velocity selector is 2100 V/m, Calculate the radius r of the path for a singly charged ion with mass m = 2.29 10-26 kg
A 2.5 kg block of ice at a temperature of 0.0 C and an initial speed of 5.7 m/s slides across a leveled floor. If 3.3 x 10^5 J are required to melt 1.0 kg of ice, how much ice melts, assuming that the initial kinetic energy of the ice block is entire..
Two metal plates are held together by two steel rivets, each of diameter 0.24 cm and length 1.3 cm. How much force must be applied parallel to the plates to shear off both rivets?
A light wave has a 670{\rm nm} wavelength in air. Its wavelength in a transparent solid is 420{\rm nm}. What is the light's frequency in the solid
The loaded car of a roller coaster has mass M = 320 kg. It goes over the highest hill with a speed v of 21.4 m/s. What is the force (N) that the track must exert on the car
The coyote starts 42.0 m from the brink of a cliff. The roadrunner zips past him at a speed of 18.0 m/s. What is the acceleration of the coyote
An RLC series circuit has L = 0.324 H and C = 6.93 ?F . The source has a peak voltage of 442 V. What is the peak voltage across the inductor at resonant frequency
If 5.0 moles of air is at 0.0 degrees Celsius and 1.0 atm pressure, what is the volume occupied by the gas in m^3
question a ball is tossed so that it bounces off the ground rises to a height of 1.30 m and then hits the ground again
An aluminum clock pendulum having a period of 1.00 s keeps perfect time at 20.0°C. How much time will it gain or lose every hour
a child attempts to kick a ball over a wall 5.0 m tall 30.0 m away. if the child kicks the ball with an inital velocity
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