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Two persons are trying to rip out a telephone pole with their bare hands. Looking aerially, Tommy is pulling on the telephone pole with 775 Newton of force at an angle of 110o. Pete is pulling on the telephone pole with an 875 Newton force at an angle of 250o. Find with what force is the telephone pole resisting, since it will be impossible for these two to pull the telephone pole out of the ground?
a plastic rod that has been charged to -15.0 nc touches a metal sphere. afterward the rods charge is -10.0 nc. what
A stationary railroad whistle is sounded. An echo is heard 5.0 seconds later by the train's engineer. If the speed of sound is 343 m/s, how far away is the reflecting surface
q1. damping is negligible for a 0.139 kg mass hanging from a light 7.00 nm spring. the system is driven by a force
An arrow is shot at an angle of θ=45° above the horizontal.
a solid metal sphere of radius 3.00 m carries a total charge of -3.00 microc. what is the magnitude of the electric
A typical incandescent lightbulb has a filament temperature of approximately 3191 K. At what wavelength is the intensity of the emitted light highest
on turning a corner ,a motorist rushing at 44m/s find a child on road 100m away. he applies the brakes so as to stop the motorcar within 1m of child. calculate the time required to stop.
A human being can be electrocuted if a current as small as 51 mA passes near the heart. An electrician working with sweaty hands makes good contact with the two conductors he is holding. If his resistance is 1600 Ω, what might the fatal voltage in vo..
The electric field midway between two equal but opposite point charges is 639 N/C, and the distance between the charges is 17.1 cm. What is the magnitude of the charge on each
A mass of 0.32 kg, attached to a spring with a spring constant of 73.0 N/m, is set into simple harmonic motion. What is the magnitude of the acceleration of the mass
A sanding disk with rotational inertia 2.0 multiply.gif 10-3 kg·m2 is attached to an electric drill whose motor delivers a torque of 8 N·m about the central axis of the disk. compute the angular momentum of the disk
a 3.45 g hockey puck rests on a flat smooth table.a horizontal net force of 85.0 n acts on it for 1.10 seconds. the
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