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An object can move in either direction along a horizontal line (the + position axis). Assume that friction is so small that it can be neglected. Which graph corresponds to the force applied to the object that would produce the motion described?
An electron moves in a circular path perpendicular to a constant magnetic field with a magnitude of 1.00 mT. Determine the radius of the circular path
a 4500 kg helicopter accelerates upward at 2.0m/s^2. what lift force is exerted by the air on the propellers
A model sailboat is slowly sailing west across a pond at 0.300 m/s. What is the sailboat's mass
An object of mass m attached to a spring of force constant k oscillates with simple harmonic motion. What is the object's velocity when its potential energy is 2/3 E
A rocket is launched at an angle of 57.0° above the horizontal with an initial speed of 99 m/s. The rocket moves for 3.00 s along its initial line of motion with an acceleration of 30.0 m/s2. At this time, its engines fail and the rocket proceeds ..
A radio antenna broadcasts a 1.0 MHz radio wave with 29kW of power. What is the wave's intensity 33km from the antenna
A lightning bolt might carry a current of 1.00 multiply.gif 10 4 A for a short time. What is the resulting magnetic field 80 m from the bolt? Presume that the bolt extends far above and below the point of observation.
In a sample of 600 rods taken from machine 2, 582 met the specifications. Machine 2 is more expensive to run, so it is decided that machine 1 will be used unless it can be convincingly shown that machine 2 produces a larger proportion of rods mee..
How far will the ball travel if the bat is 1 m in length if the instaneous linear velocity of the bat is 37.5 m/s at the moment of impact
A closed system is observed to have 51objects in it. Initially, the total energy of the system is 6024 J. After 8.8 hour has passed, calculate how much total energy will the system contain
The volume of a gas is halved during an adiabatic compression that increases the pressure by a factor of 2.5
Levitation by Light Pressure. Consider an isolated hydrogen atom of mass 1.66 x10^- 27 kg. Find the number of photons that must strike the atom per second, and the corresponding and optical power, for it not to fall under the effect of gravity, gi..
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