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Crossed magnetic and electric fields are established over a certain region. The magnetic field is .90 T vertically downward. The electric field is 7.0e6 V/m horizontally east. An electron, travelling horizontally northward experiences zero net force from these fields and so continues moving in a straight line. Find what is the electrons speed? Enter number in m/s.
Let us assume that the winter consists of 150 days in which the outside temperature is 0C. This will give the typical number of "heating degree days" observed in a winter along the northeastern US seaboard.
A spaceship is measured to be 186 m long while at rest relative to the observer. what length does the observer measure
A cars brakes can only accelerate the car by -10m/s^2. If the car is going 30m/s when the brakes are applied, how long would it take for the car to come to a stop.
After collision, the component of the total momentum parallel to the floor must remain zero, since the net external force acting on the plate has no component parallel to floor.find out the masses of pieces 1 and 2.
A ski jumper has 1.2 ´ 10 J of potential energy at the top of the ski jump. The friction on the jump slope is small, but not negligible. What can you end about the ski jumper's kinetic energy at the bottom of the jump.
An insulated thermos contains 138.0 cm3 of hot coffee at a temperature of 80.0 °C. You put in 11.0 g of ice cube at its melting point to cool the coffee. What is the temperature of the coffee once the ice has melted and the system is in thermal eq..
Two cylindrical artificial bones are made of the same material and length, one with twice the radius as the other. When the two have the same tension force applied, the larger bone stretches by what factor compared to the smaller bone?
Consider Rutherford’sexperiment. Would the estimated size of the nucleus be greater, smaller, or the same if he has used a more energetic source ofalpha particles – that is, a radioactive source in which the alpha particles are emitted withgreater..
On planet Zog, Mr. Spock measures that it takes 1.38 s for a mass of 0.30 kg to hit the ground when released from rest from a height of 2.85 m
Light in air is incident at the polarizing angle on a certain piece of glass. The angle of refraction is 32°. Evaluate the index of refraction of the glass
A dynamite blast at a quarry launches a rock straight upward, and2.5 s later it is rising at a rate of 18 m/s. Assuming airresistance has no effect on the rock, calculate its speed(a) at launch and (b)5.3 s afterlaunch
Katie and Emily are riding on a circular merry-go-round that has a radius of 5m. Katie is on a horse that is 2.5m from the center of merry-go-round and Emily is on a tiger that is 4.5 m from the center of the merry-go-round. What is Katie's tangen..
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