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If a jet engine produces at takeoff a 100 dB sound 100 m from the aircraft, at what distance should the sound's intensity level be 80 dB? Assume that the sound is not reflected or absorbed by the surroundings.
A caterpillar climbs up a one-meter wall. For every 3 cm it climbs up, it slides down 1 cm. It takes 10 minutes for the caterpillar to climb to the top. Compute the speed at which the caterpillar travels.
While a person is walking, his arms swing through approximately a 45.0^\circ angle in 0.520s. What is the acceleration of a 1.60 gram drop of blood in the fingertips at the bottom of the swing
A model rocket blasts off from the ground, rising straightupward with a constant acceleration thast has a magnitude of 86.0m/s2 for 1.70 seconds, at which point its fuel abrutlyruns out. Air resistance has no effect on its flight. What maximum altitu..
It again strikes the floor. Find (c) the time interval from when the ball was launched to when the ball strikes the floor and (d) the horizontal distance from the point where the ball was launched to the point where the ball strikes the floor.
a speed skater goes around a turn that has a radius of 26 m. the skater has a speed of 14 ms and experiences a
A uniform solid disk has a radius of R = 0.52 m and mass of M = 5.5 kg and is free to rotate about an axis through its center of mass. How many revolutions has the disk made at t = 8.2 seconds
An ordinary glass is filled to the brim with 334.0 mL of water at 100°C. If the temperature decreased to 12°C, how much water could be added to the glass
A steel ball of mass m1 = 1.1 kg and a cord of length of L = 1.9 m of negligible mass make up a simple pendulum that can pivot without friction about the point O, what is the velocity of the block just after impact
A parallel-plate capacitor has an area of 100 x 100?m^2. Calculate the capacitance values for two distances between the electrode plates: 1 and 0.5 µm. The medium is air. If the bias (voltage) in (a) is 3V, what is the attractive force?
A 4.60 g bullet moving at 616 m/s strikes a 670 g wooden block at rest on a frictionless surface. The bullet emerges, traveling in the same direction with its speed reduced to 432 m/s. What is the speed of the bullet-block center of mass
A resonant circuit in a radio receiver is tuned to a certain station when the inductor has a value of 1.50 µH and the capacitor has a value of 2.20 pF. Find the frequency of the radio station
A 4.30 kg box is sliding across the horizontal floor of an elevator. The coefficient of kinetic friction between the box and the floor is 0.310. Determine the kinetic frictional force that acts on the box for each of the following cases.
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