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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?
A football punter accelerates a football from rest to a speed of 11 m/s during the time in which his toe is in contact with the ball (about 0.24 s). what average force does the punter exert on the ball
Two train cars are on a straight, horizontal track. One car starts at rest and is put in motion with a constant acceleration of 1.80 m/s2. Where will the cars collide
The power stroke of the myosin protein on an actin filament that generates tension in a muscle appears to be a 10 nm displacement generated by about a 1 pN force. Each power stroke is accompanied by the splitting of one ATP molecule which releases..
A railroad flatcar is traveling to the right at a speed of 13.0 m/s relative to an observer standing on the ground. What is the velocity of the motor scooter relative to the flatcar if its velocity relative to the observer on the ground is zero
High power lasers in factories are used to cut through cloth and metal. One such laser has a beam diameter of 0.407 mm and generates an electric ?eld at the target having an amplitude 0.985 MV/m.
question1hold switch closed. place a magnetic field sensor between the turns of the slinky by its center. rotate the
A 1.00 Kg ball is shot out of a cannon inclined at 40 degrees, by a spring initially compressed by 0.500 m. Where does the ball land relative to the cannon
A cyclist is coasting at a steady speed of 16m/s but enters a muddy stretch where the effective coefficient of friction is 0.55. What will be his speed upon emerging
Electrons accelerated by a potential difference of 12.43 V pass through a gas of hydrogen atoms at room temperature. Calculate the wavelength of light emitted with the shortest possible wavelength
A galvanometer has an internal resistance of 30?and deflects full scale for a 60??A current, What is the magnitude of this resistor
A cube of copper with each edge having the dimension 12.7 mm, is put in a vise and squeezed by a force of 215 N exerted by either side of the vise. What is the stress in the copper cube
Suppose one bullet with M=5.12g moving to the right with a speed of 250 m/s directed at 21.3 degrees above the horizontal collides, What is the direction of their common velocity immediately after the collision? Measure this angle in degrees from t..
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