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An incident wave D=(2.0 cm) sin (4.5x-18t) (where x and t are in meters and seconds ) travels down a cord from a section with linear density 0.30 kg/m to one with density 0.10 kg/m. When the wave travels into the lighter density region, its wavelength becomes
a) 0.81m
b) 1.4m
c) 1.7m
d) 2.4m
A horse canters away from its trainer in a straight line, moving135 m away in 15.6 s. It then turns abruptly and gallops halfwayback in 6.20 s. Calculate its average speed for the entire trip, using "away fromthe trainer" as the positive direction.
A 28.4kg beam is attached to a wall with a hinge and its far end is supported by a cable. what is the horizontal component of the force exerted by the hinge on the beam
A 2.00 kg block is placed against a spring on a frictionless 26° incline. The spring, whose spring constant is 19.8N/cm, compute the elastic potential energy of the compressed spring
An aircraft with a mass of 889 kg accelerates from 0 to 95 m/s in 8.1 seconds, What is the kinetic energy of the aircraft when the aircraft launches
A spherical capacitor of inner radius 10 cm stores 10nC of charge when charged with 10V. Find s capacitance, its outer radius and the volume between the two spheres
A car is travelling with a velocity of + 88.0 km/h. It accelerates at a constant rate of 20 m/s2. If the acceleration lasts for 5.6s, what is the final velocity of the car.
A molecule of DNA (deoxyribonucleic acid) is 2.09 µm long. The ends of the molecule become singly ionized: negative on one end, compute the effective spring constant of the molecule
Two charges, qA and qB, are divided by a distance, d, and exert a force, F, on each other. Analyze Coulomb's law and answer the following questions.
Which of the following statements is true for an elastic collision?
Two 5.3cm x 5.3cm metal plates are separated by a 0.20--thick piece of Teflon. What is the maximum potential difference between the disks
A diving bell with interior air pressure equal to atmospheric pressure is submerged in Lake Michigan. At what depth is the diving bell
A 15-kg block rests on a level frictionless surface and is attached by a light string to a 5.0-kg hanging mass where the string passes over a massless frictionless pulley
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