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There is evidence that elephants communicate via infrasound,generating rumbling vocalizations as low as 14 hz that can travelup to 10 km. The intensity level of these sounds can reach98 dB, measured a distance of 4.5 m from the source. Determine the intensity levelof the infrasound 10 km from the source, assuming the sound energyradiates uniformly in all directions.
At a rock concert, the sound intensity 1.0m in front of the bank of loudspeakers is 0.10W/m^2. How much energy is transferred to each eardrum in one second
A 250-g object attched to a spring oscillates on a frictionless table with a frequency of 4 Hz and an amplitude of 20 cm. Calculate the maximum potential energy of the system
Three moles of an ideal monatomic gas are at a temperature of 345 K. What is the change in the internal energy of the gas
On an old-fashioned rotating piano stool, a woman sits holding a pair of dumbbells at a distance of 0.650m from the axis of rotation of the stool. What is the initial angular momentum of the system
a rocket is moving at 0.4c toward a rocket which is moving at 0.5c. what is the relative speed of one rocket as seen from the other
Water is at rest at the bottom of a well of depth h = 7.82 m. A pump lifts mass at a rate of dm/dt = 119 kg/minute from the well and ejects it with a speed v = 3.74. m/s. find P, the power (energy per time) needed to do this work
An L-C circuit consists of an inductor with an inductance of 65.0mH and a capacitor with a capacitance of 300 uF . The initial charge on the capacitor is 6.50 uC , and the initial current in the inductor is zero A.)What is the maximum voltage acro..
1 kilograms of water are changed from liquid water at 100°C into steam at 100°C. For each situation, determine the change in mass of the water
An object, of mass m = 2 kg, is located between two massless springs on a frictionless incline of 30o . Initially the object is held at a position where the lower spring (k1= 950 N/m), Determine the maximum compression of the upper spring
question 1two astronauts yuri and valentina are flying their rockets towards each other both at a speed of 09c as
Calculate the hydrostatic difference in blood pressure between the brain and the foot in a person of height 1.75 m
A 25.0 uf capacitor is charged to a potential difference of 850v . The terminals of the charged capacitor are then connected to those of an uncharged 11.0 uf capacitor. Compute the original charge of the system. Compute the final potential difference..
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