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A 70 kg person is at the top of a 10 m tall slide. Ignoring friction, what is his or her speed at the halfway point where he or she is 5 m from the bottom of the slide? What is his or her speed at the bottom of the slide?
Consider the Earth and a cloud layer 900 m above the planet to be the plates of a parallel-plate capacitor. what is the maximum charge the cloud can hold
One end of a rope is tied to a block of mass 3.4 kg and you pull straight up on the other end of the rope to lift the block up off of the ground with an acceleration of 3.6 m/s2. What force does the rope exert on the block
An 81 mm focal-length lens is used to focus an image on the film of a camera. How far ahead of the film should the lens be if the object to be photographed is 10.0m away
question a 2.88 mol sample of an ideal gas expands reversibly and isothermally at 286 k until its volume is doubled.
A rescue plane is flying at 300 m above the ground at 210 km/hr. It is going to drop a package of supplies to some survivors on the ground. how far from the survivors should it drop the package
A heat engine operating between 40oC and 380oC has an efficiency 60% of that of a Carnot engine operating between the same temperatures. at what rate does it exhaust heat
The horizontal rod OA rotates about a vertical shaft according to the relation ? = 10t, where ? and t are expressed in rad/s and seconds, respectively. A 0.5-lb collar B is held by a cord with a breaking strength of 4 lb. Neglecting friction, dete..
A wire 6.00m long with diameter of 2.20mm has a resistance of 0.0350ohm. Find the resistivity of the material of the wire
A clock has a second hand whose tip rubs against the inside of the glass cover. what is the minimum torque that must be applied to the second hand
Consider a beam of electrons passing through a region with crossed electric and magnetic fields. What is the speed (in m/s) of the electrons
A nonreflective coating (n = 1.31) covers the glass (n = 1.52) of a camera lens. determine the minimum nonzero thickness that the coating can have
A proton is propelled at 2 x 10^6 m/s perpendicular to a uniform magnetic field. If it experiences a magnetic force of 5.8 x 10^-11 N, find the strength of the megnetic field
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