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A ball is thrown from the top of a cliff at an angle theta with respect to the horizontal direction with an initial speed of 10m/s. The kinetic energy of the ball when it strikes the ground willbe greatest when theta =1. 0 degrees;because 0 degrees means a horizontal launch so no speed is wastedin the vertical direction.2. 45 degrees; because 45 degrees gives the longest range for projectile motion and hence the greatest kinetic energy.3. 90 degrees; because 90 degrees is a vertical launch so novelocity is wasted on horizontal motion.4. all give the same kinetic energy; the overall vertical displacement is the same in all three cases so the change ingravitational energy is the same in all three cases.
An interferometer is used to measure the length of a bacterium. The wavelength of the light used is 650 nm. How long is the bacterium
a container has a large cylindrical lower part with a long thin cylindrical neck. the lower part of the container holds
a circuit consists of an ideal ac generator a 30 microf capacitor and an 75? resistor all connected in series. the
Two metal balls A and B of negligible radius, connected by a taut nonconducting thread of length 2.90 m, are floating at rest on Space Station Freedom between two metal bulkheads.
Suppose you hear a clap of thunder 15.80 s after seeing the associated lightning stroke. The speed of sound waves in air is 343-m/s, and the speed of light in air is 3.00x 10^8 m/s.
A 20.0 kg box is dragged across a rough floor by a horizontalforce of 85.0N (i). Starting from rest, the force acts for3.00 s and the box is displaced 5.90 m in the +x direction. Determine the coefficient of friction between the box and the floor.
A horizontal beam of positrons initially moving at 3.3 107 m/s is deflected vertically by the vertical electric field between oppositely charged parallel
Neglect air resistance and muscle atrophy and assume the same upward normal reaction force as on earth: how far could she long jump on the moon
calculate the conductance and the resistance of a 10 m length of 14 gauge copper wire which has a diameter of 1.63 mm.
Two identical parallel-plate capacitors, each with capacitance C, are charged to potential difference ?V and then disconnected from the battery. Find the total energy of the system of two capacitors before the plate separation is doubled
The ultrasonic transducer used in medical ultrasoundimaging, is a very thin disk ( m =0.10g) driven back and forth in SHM at 1.0 MHz by an electromagnetic coil.
a bucket of water of mass 14.7 is suspended by a rope wrapped around a windlass, that is a solid cylinder with diameter 0.280m with mass 11.6 kg. with what speed does the bucket strike the water
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