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An enemy ship is on the east side of a mountain island, as shown in the figure. The enemy ship has maneuvered to within d1 = 2161 m of the h = 1490 m high mountain peak and can shoot projectiles with an initial speed of vi = 247 m/s. If the western shoreline is horizontally d2 = 240 m from the peak, what are the distances from the western shore at which a ship can be safe from the bombardment of the enemy ship?
An object is in front of a converging lens (f = 0.21 m). The magnification of the lens is m = 4.8. Through what distance should the object be moved
Gracie slides down a frictionless slide of length L that makes an angle (theta) with the ground. (A.) Gracie starts out at rest at the top of the slide.
a 142- baseball is dropped from a tree 12.0 above the ground. with what speed would it hit the ground if air resistance
A lighthouse sweeps its beam of light around in a circle once every 6.0 s. To an observer in a spaceship moving away from Earth, What is the speed of the spaceship relative to Earth
Radio astronomers often study the radiation emitted by a hydrogen atom from a transition between the two hyperfine levels associated with the ground state
When the temperature of a thin silver [? = 19 × 10-6 (C°)-1] rod is increased, the length of the rod increases by 3.7 × 10-3 cm. By how much does the length of the gold rod increase
What is the charge-conjugate reaction to K- + p ----> K-0 + n? Can a K-, p system be an eigenstate of the charge conjugation operator?
at three corners of a rectangle length 11.8 cm height 5.9 cm the following charges are located q1 upper left corner q2
Observer S detects two flashes of light. A big flash occurs at x1 = 1242 m and, 6.06 ?s later, a small flash occurs at x2 = 802 m. what is the time interval between the flashes
There are approximately 120 million TVs in the United States. Each uses, on average, 75 W of power, how much money is spent every day in keeping the TVs turned on
the springs of a 495 kg motorcycle have an effective force constant of 9130 nm. by what percent and in what direction
A sound wave with intensity 39 mW/m2 interferes constructively with a sound wave that has an intensity of 12 mW/m2. What is the intensity of the superposition of the two
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