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Planar motion:An electron enters a magnetic field of 0.7 T, moving perpendicular to it with a speed of 5·105 m/s.
a.) Find the radius of the orbit it will make.
Helical motion:
If an electron were sent at the same speed, but at an angle of 70o to the magnetic field:
c.) What would be the radius of the helical motion?d.) How long would it take for the electron to travel 3 m along ("downstream" to) the magnetic field?
e.) The "pitch" of a helix is the forward distance it travels during one complete turn of the helix. What is the pitch of this helix?
In the figure below, the converging lens' focal length is 13 cm, d = 18 cm, and the diverging lens' focal length is -12.6 cm, How tall is the image formed by the diverging lens
A scaffold of mass 60 kg and length 6.5 m is supported in a horizontal position by a vertical cable at each end. What is the tension in the cable closer to the painter
2.50 kg block slides down the inclined plane at a 20.0degree angle as shown below. Calculte the work done by the force of friction
A plane is flying in the horizontal plane. At time t1 = 0 s with the components of its velocity are vx = 100 m/s and vy = 120 m/s. What was the change in the direction of the velocity
When a rubber band is stretched a distance x, it exerts a restoring force F = -2x + 5x^5. What is the work done in stretching this rubber band from x=0 to x=2.
A car is moving at a constant velocity for 3s until it is 3.0 m from a yellow light. It slows to a stop in 2.0s. It remains stopped for 50s and then speeds up for 2s.
What is an acceleration of the particle at the instant
Mike throws a ball upward & toward the east at a 10.0 angle with a speed of 57.0 m/s. find the ball's initial angle in Nancy's referance frame
Photons of wavelength 530 nm are incident on a metal. The most energetic electrons ejected from the metal are bent into a circular arc, compute the work function of the metal
A 0.180 kg baseball, travelling 32.0 m/s, strikes catcher's mitt that recoils 13.0 cm in bringing the ball to rest. What was an average force (in newtons) applied by the ball to the mitt.
For comparison, what is the magnitude of the acceleration a test tube would experience if dropped from a height of 1.0 m and stopped in a 2.0-ms-long encounter with a hard floor
After 1.86 days, the activity of a sample of an unknown type radioactive material has decreased to 88.8% of the initial activity
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