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A flash of lightning is seen due north 4.0 s before the sound of the thunder is heard. If the air temperature is 27oC, find how much longer the sound of the thunder would take to reach the listener if the wind were blowing from the south at 48 km/h.
A person standing 1.0 m from a sound source measures an intensity of 120 dB. What is the sound intensity (a) 10.0 m and (b) 100.0 m from the source? Illustrate your solution with a diagram.
A train in a station sounds its whistle at a frequency of 494 Hz while moving away from a stationary observer at 3 m/s. A stationary train sounds its 494 Hz whistle at the same time.
What is the beat frequency heard by the observer, assuming a sound speed of 343 m/s?
Did Kochheim's net income as a percent of sales increase, decrease, or remain unchanged over the 3-year period? Answer:
A 5.0- kg block oscillates with an amplitude of 0.090 m on a light spring of constant k = 28.0 N/m. What is the maximum value of the block's velocity
A point on the rim of a 0.30-m-radius fan blade has centripetal acceleration of 0.35 m/s2. Find the centripetal acceleration of a point 0.040 m from the center of the same wheel
The energy stored in a C-C bond is 348 kJ*mol-1 and its length is 0.154 nm. Calculate its tensile strength
An 800-N billboard worker stands on a 4.0-m scaffold supported byvertical ropes at each end. what is the tension in the ropenearest the worker
A solid, square pinewood raft measures 3.6m on a side and is 2.70 m thick. What is the total mass of swimmers that the raft can carry and float withits top surface at water level?
A horizontal 790-N merry-go-round of radius 1.30 m is started from rest by a constant horizontal force of 45 N applied tangentially to the merry-go-round. Find the kinetic energy (Joules) of the merry-go-round
How much space will it travel along the circle after it stops? In how much time will it stop? How many complete revolutions will the ball make before coming to a stop?
When a 2.75 kg fan, having blades 18.5 cm long, is turned off, its angular speed decreases uniformly from 10.0 rad/s to 6.30 rad/s in 5.00 s. (a) What is the magnitude of the angular acceleration of the fan?
The model airplane in Figure 5.7 is flying at a speed of 14.4 m/s on a horizontal circle of radius 17.2 m. What is the net work done on the plane
a block starts at rest and slides down a frictionless track. the acceleration of gravity is 9.81 ms2. it leaves the
Find A) its kinetic energy of rotation, and B) its new angular velocity if a mass of 10kg on the rim of the disc is suddenly fixed.
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