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A bullet having a velocity of 680 m/s hits a target 510 m away. If the speed of sound is 340 m/s, how soon after the bullet hits the target does the sound of the shot reach the target ?
A bird is flying directly toward a stationary bird-watcher and emits a frequency of 1200 Hz. What is the speed of the bird
two resistors 54.6 and 83.9? are connected in parallel. the current through the 83.9-? resistor is 2.84a. a determine
Two blocks with different mass are attached to either end of a light rope that passes over a light, frictionless pulley that is suspended from the ceiling. what is the mass of each block
A jet engine emits sound uniformly in all directions, radiating an acoustic power of 3.23 × 102 kW. If the intensity of the sound at a distance of 40.3 m from the engine is 15.8 W/m^2 calculate the corresponding sound intensity level in dB
A 46.0-kg girl is standing on a 159-kg plank. Both originally at rest on a frozen lake that constitutes a frictionless, What is the velocity of the plank relative to the ice surface
A person of mass 75 kg stands at the center of a rotatingmerry-go-round platform of radius 2.5m and moment of inertia 1100 kgm2. Calculate the rotational kinetic energy of the system
which of the following are true about vector components for vectors in two dimensions. choose all that apply they are
A thin ring of radius R rotating with angular velocity ω isplaced flat on a horizontal table the coefficient of frictionbetween the ring and the table is μ. After what time will the ring stop spinning
A 8.51 -m ladder with a mass of 21.8 kg lies flat on the ground. A painter grabs the top end of the ladder and pulls straight upward with a force of 245 N. What is the net torque acting on the ladder
A company uses a process cost accounting system and the weighted average method for inventory costs. Calculate the equivalent units of production for direct labour for the year.
a 0.30 kg ball is tied to a 38 cm long string and released from a horizontal position. it swings down colliding with a
A series AC circuit contains a resistor, an inductor of 200 mH, a capacitor of 5.60 µF, and a source with ?Vmax = 240 V operating at 50.0 Hz. Calculate the inductive reactance
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