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A fish maintains its depth in fresh water by adjusting the air content of porous bone or air sacs to make its average density the same as that of the water. Suppose that with its air sacs collapsed, a fish has a density of 1.19 g/cm3. To what fraction of its expanded body volume must the fish inflate the air sacs to reduce its density to that of water?
An AC voltage source, with a peak output of 120V, results in dissipation of energy in a resistor at rate of 100W. What is the value of the resistance
Two masses m1 and m2 sit on a horizontal, frictionless table and are connected by a light string, Find the tension in each of the two strings
When a firecracker is placed inside a bowling ball, the momentum before the explosion is equal to the momentum after the explosion because
consider a collection of three point charges. two equal charges q1 q2 3.0 nc are on the x-axis at the points x 4.0
Calculate the rest energy of an electron in joules and Calculate the rest energy of an electron in MeV (1MeV=1.60×10?13J)
On a cold day, a heat pump absorbs heat from the outside air at 14°F (-10°C) and transfers it into a home at a temperature of 86°F (30°C)
in a diagnostic x-ray procedure 5x10^10 photons are absorbed by tissue with a mass of .6 kg. What is the equivalent radiation dose in mrem
n = 3.60 mol of Hydrogen gas is initially at T = 340 K temperature and pi = 3.32×105 Pa pressure, How much entropy did the gas emit
A dc motor is connected to a constant emf of 16.9 V. The resistance of its windings is 2.0 ?. At normal operating speed, the motor delivers 7.1 W of mechanical power. (a) What is the initial current drawn by the motor when it is first started up? (b)..
In an experiment, 200 g of aluminum (with a specific heat of 900 J/kg·K) at 100°C is mixed with 48.0 g of water (4186 J/kg·K) at 20°C, What is the entropy change of the aluminum
A 1500 kg car is headed directly for a brick wall when the driver realizes the danger and slams on the brakes. The car's initial speed is 32 m/s, Determine how far the car travels while skidding to a stop
A young person has a near point NP= 14.4cm and a far point FP = 3.54m. using a ideal near point 25cm, determine the proper corrective lens for this person
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