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An enemy ship is on the east side of a mountainous island. The enemy ship can maneuver to within 2500 meters of the 1800 meter high mountain peak and can shoot projectiles with an initial speed of 250m/sec. If western shoreline is horizontally 300 meters 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?
A car travels a straight road at 130 km/h for 30min then at 50 km/h for 10min . It then reverses and goes at 80 km/h for 20min . What is the average velocity for the entire trip? What is the average speed for the entire trip?
What additional experiment can help you decide between these two possibilities.
A small object of mass 0.0150kg & a charge of 3.1 uC hangs fromthe ceiling by a thread. determine the tension in the thread
During an earthquake, the floor of an apartment building is measured to oscillate in approximately simple harmonic motion with a period of 1.60 seconds and an amplitude of 9.00cm, Determine the maximum speed of the floor during this motion
In a simple model of the hydrogen atom an electron orbits a proton at 2.18 x 10^6 m/s in a circle radius 5.29 x 10^ -11 m. Find the magnitude of the electron's angular momentum
After thermal equilibrium has been reached, the system has a change in temperature measured as 0.020 oC. explain the entering speed of the bullet.
A block of mass 16.7 kg supported by a vertical massless cable is initially at rest. estimate the magnitude of the net force acting on the mass
A pilot having mass M(kg) flies a plane in a vertical loop with a radius of 800m at a constant speed of 500 km/h. Determine the force exerted on the pilot by the seat at both the top and bottom of the loop
A telescope can be used to enlarge the diameter of a laser beam and limit diffraction spreading. what is the minimum angular spread of the beam
Three point charges are on the x-axis. The first is located at -4 meters asn has a charge of -6 coulombs. What is the net force on the charge at the origin
An ideal gas is compressed at constant pressure to one-half its initial volume. find the initial volume of the gas
At its Ames Research Center, NASA uses its large "20-G" centrifuge to test the effects of very large accelerations ("hyper gravity") on test pilots and astronauts. In this device, an arm 8.84 {rm m} long rotates about one end in a horizontal plane..
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