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The US military uses sonar with a loudness of 235 dB measured at 1 m. Say an unfortunate fish is swimming 0.5 m in front of the sound source. The fish's body tissue has a density of 1.06 g/cm3, and the speed of sound in its tissue is 1.6 X 105 cm/s. The seawater has a density of 1.0 g/cm3 and the speed of sound in this water is still 1.4 X 105 cm/s. Treat the fish as a sphere with a mass of 5 kg and a specific heat of 0.83 cal/g C. The fish's body tissues absord all of the sound energy that enters the body. At what rate would its temperature rise due to the absorbed sound energy if it sheds none of that heat to the environment? Ignore the void created by the air bladder.
a) 1.75 X 106 C/s
b) 7.49 X 106 C/s
c) 0.27 X 106 C/s
d) 5.91 X 106 C/s
e) 2.45 X 106 C/s
Two convex lens F1 and F2 with the focal length 40cm and 20cm respectively are separated by a distance 14cm. F2 is placed on the right side of the F1 and Object of height 4cm is placed in front(left side) of F1 in such a way that the distance between..
Friction and air resistance are negligible. Illustrate what speed does the ball have when the cable makes an angle of 30 degrees with respect to the vertical?
Four solid plastic cylinders all have radius 2.75 cm and length 6.42 cm. Find the charge of each cylinder given the following additional information about each one.
A 250g , 25-cm-diameter plastic disk is spun on an axle through its center by an electric motor. What torque must the motor supply
air passes steadily through a device from 20 psia and 80degf to 40 psia. during the process a work input of 24.2 btulb
Two particles each have a mass of 5.5 x 10-4 kg. One has a charge of +4.8 x 10-6 C, and the other has a charge of -4.8 x 10-6 C. How fast is each particle moving when the separation between them is one-third its initial value
An isolated conductor of arbitrary shape has a net charge of +1.30×10-5 C. Inside the conductor is a cavity within which is a point charge q = +3.25×10-6 C. What is the charge on the cavity wall
q1. 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
A hydrogen atom initially in the ground state absorbs a photon, which excites it to the n = 11.0 state. Determine the frequency of the photon
In the reference frame of the laboratory, a particle moves in the x-y plane with a velocity of 0.7c at an angle of 40 degrees with the x-axis. Find the velocity (magnitude and direction) of this particle
A large turntable rotates about a fixed vertical axis, makingone revolution in 8.00 s. What is theangular speed of the turntable when the child is 3.00 m from the center
The proton is deflected downward toward the earth. What is the direction of the magnetic field?
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