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A rock is thrown from the edge of a cliff to the ground 16.0 m below. The rock has an initial velocity of 18.5 m/s, directed 40.0° above the horizontal.
How long does it take the rock to reach the ground?How far from the base of the cliff does the rock strike the ground?Find the velocity/direction of the rock just before it strikes theground.
The two stars in a binary star system have masses 2.3x1030kg and 5.5x1030kg. They are separated by 1.5x1012m. What is the speed of the lightest star
Suppose that the current is used up as it moves through a resistor. The potential difference across the resistor is kept the same and V/I = R. how can the resistance of the resistor be constant
A solid metal sphere of radius a = 1.30 cm is surrounded by a concentric spherical metal shell of inner radius b = 1.90 cm and outer radius c = 2.40 cm. What is the surface charge density, sc, on the outer surface of the outer spherical conductor
A sprinter explodes out of the starting block with an acceleration of +3.9 m/s2, What is her velocity at the end of the race
Find the minimum initial speed of a projectile in order for it to reach a height of 1783 km above the surface of the earth
Particle X has a speed of 0.790 c and a momentum of 5.06×10-19 kgm/s. What is the mass of the particle? What is the rest energy of the particle
A cosmic-ray proton is moving at such a speed that it can travel from the Moon to Earth in 1.5s. At what fraction of the speed of light is the proton moving
Mary needs to row her boat across a 100-{rm m}-wide river that is flowing to the east at a speed of 1- {rm m/s}. Mary can row the boat with a speed of 2- {rm m/s} relative to the water.
A ballistic pendelum of mass 1kg is struck by a 0.003kg bullet moving at 600 m/s. How high does the pendulum swing
Announcers at a certain radio station say that they are at "95 FM on your dial," meaning that they transmit at a frequency of 95 MHz (95 megahertz, or 95 million cycles per second). What is the wavelength of the radio waves from this station?
A 300 DC power supply has fully charged a 15 mF capacitor. The charged capacitor is connected to a 20 mH inductor. find the magnetic energy in the inductor
A horizontal beam of electrons initially moving at 4.0x10^7 m/s is deflected vertically by the vertical electric feild between oppositely charged parallel plates. the magnitude of the field is 2x10^4N/C. What is the verticle deflection d of the el..
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