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An electron follows a helical path in a uniform magnetic field of magnitude 0.642 T. The pitch of the path is 7.48 ?m, and the magnitude of the magnetic force on the electron is 1.77 × 10-15N. What is the electron's speed?
A hand grenade (m=580g) slides across the (essentially frictionless) floor at a speed of 0.86 m/s. determine the speed of the second fragment
Using a simply pulley/rope system, a crewman on an Arctic expedition is trying to lower a 5.52 kg crate to the bottom of a steep ravine of height 23.9 meters. At what speed will the crewman hit the bottom of the ravine
In a conversion from military to peacetime use, a missile with a maximum horizontal range of 160 km is being adapted for studying the upper atmosphere
The mass of a string is 1.00 10-3 kg, and it is stretched so the tension in it is 120 N. What is the length of the string
A centrifuge in a medical laboratory is switched on and rotates through 3900 revolutions. determine the final angular speed of the centrifuge
A thin uniform rod (length = 1.29 m, mass = 1.95 kg) is pivoted about a horizontal frictionless pin through one of its ends. What is the angular acceleration of the rod at the instant it is released
The chemical atomic mass of hydrogen, with the two stable isotopes 1H and 2H (deuterium), is 1.00798. Use m(H1) = 1.007825 u, determine the natural abundance of 2H isotope
A student is reading a lecture written on a blackboard. The lenses in her eyes have a refractive power of 68.80 diopters, If the writing on the blackboard is 5.70 cm high, what is the size of the image on her retina
A mass on a spring vibrates in simple harmonic motion at a frequency of 4.0 Hz and an amplitude of 8.0 cm. what is the displacement of the mass when t = 3.7s
When a clock reads 3 s, a cart's velocity in the positive x direction reads 5m/s, What is the magnitude in m/s^2 of the acceleration of the cart
A spherical metallic Christmas tree ornament has a diameter of 6.20 cm. If Saint Nicholas is by the fireplace, 1.41 m away, where will he see his reflection in the ornament
A large metal ring has a radius of 0.30 m and a mass (uniformly distributed) of 2.5 kg. The ring hangs from a nail as shown. What is the rotational inertia of this object
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