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An enemy ship is on the east side of a mountainous island. The enemy ship can maneuver to within 2500 m of the 1800 m high mountain peak and can shoot projectiles with an initial speed of 250 meter per second. If western shoreline is horizontally 300 m from the peak, find what are the distances from the western shore at which a ship can be safe from the bombardment of the enemy ship?
In fair weather, over flat ground, there may be a downward electric field of 155 N/C. Calculate the charge density of the air
A parallel-plate capacitor is made of two flat metal plates pressed against a thin slab of dielectric material. What is the dielectric constant of the material that was initially used to fill the gap between the plates
A 2.30 kg mess kit sliding on a frictionless surface explodes into two 1.15 kg parts: 2.32 m/s, due north, and 5.90 m/s, What is the original speed of the mess kit
A light bulb is connected to a 120 V wall socket. The current in the bulb depends on the time t according to the relation I = (1.414 A) sin[ (125.6 Hz) t ]. What is the average power delivered to the light bulb
A long Cylindrical charge distribution of radius a = 5.0 cm has a uniform charge density of ρ = -36μC/m^3. Discover the electric field at a distance r = 6 cm from the cylinder's axis using Gauss' Law.
In a classic carnival ride, patrons stand against the wall in a cylindrically shaped room. Once the room gets spinning fast enough, the floor drops from the bottom of the room! What is the speed of a person "stuck" to the wall
The suspension system of a 2100 kg automobile "sags" 12 cm when the chassis is placed on it. Also, the oscillation amplitude decreases by 57% each cycle. Estimation the values of (a) the spring constant k and (b) the damping constant b for the spring..
A man pushing a mop across a floor causes it to undergo two displacements. The first has a magnitude of 158 cm and makes an angle of 116° with the positive x axis. The resultant displacement has a magnitude of 131 cm and is directed at an angle of 32..
at some instant the velocity components of an electron moving between two charged parallel plates are vx 1.10 x 105 ms
In space, an asteroid of mass 5,000 kg is hit by an object of mass 1000 kg and travelling at 1,000 m/s with respect to the asteroid. what will be the new speed of the asteroid
A space heater, operating from a 120V line, has a hot resistance of 14Ω. At what rate electrical energy transfered into heat
A converging lens of focal length 39 cm is placed next to a converging lens of length 55 cm. What is the effective focal length for this combination
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