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An electron in a magnetic field has a cyclon frequency of 7.0 x 10^12 Hz. What is the magnetic field strength? the mass of an electron is 9.1 x 10^-31 kg, and the charge of an electron is 1.6 x 10^-19 C.
landing on the moon a spacecraft fires its rockets and comes to a complete stop just 16 meters above the lunar surface.
A cannonball launched with an initial velocity of 131 m/s at an angle of 40° follows a parabolic path and hits a balloon at the top of its trajectory.
What is magnitude of the gravitational attraction
A rope having a total mass of 0.4 kg and total length of 4 m has a 0.6 m of the rope hanging vertically down off a work bench. Explain how much work must be done to place all the rope on the bench?
An airplane traveling at half the speed of sound emits a sound of frequency 5.12 kHz. At what frequency does a stationary listener hear the sound
a rock group is playing in a bar. sound emerging from the door spreads uniformly in all directions. the intensity level
A gas molecule having a speed of 322 m/s collides elastically with another molecule of the same mass, which is initially at rest. Find the speed of each molecule after collision
a piece of copper wire is formed into a rectangle. The length of the rectangle is 3m and the width is 2m. what is the average electrical energy dissipated in the resistance of the wire
A 23kg child slides down a 4.0m -high playground slide. What is the change in the thermal energy of the slide and the seat of her pants
A wheel starts from rest and rotates about its axis with constant angular acceleration. After 7.4 seconds have elapsed, it has rotated through an angle of 23 radians. What is the angular velocity when t=7.4 seconds?
a sled is moving down an incline plane, the mass of the sled is 40 kg. the angle is 35 degrees, coefficient of kinetic friction is 0.3. Find acceleration of the sled
A 65 kg high jumper starts his push-off phase with his center of mass .45 m above groung and velocity of 0 m/s. How much work did the mat do on the high jumper
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