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The human lungs can function satisfactorily up to a limit where the pressure difference between the inside and outside of the lungs is 1/21 of an atmosphere. If a diver uses a snorkel for breathing, find how far below the water can she swim? Suppose the diver is in salt water whose density is 1057 kg/m3.
A car in stop-and-go traffic starts at rest, moves forward 19 in 8.0 , then comes to rest again. The velocity-versus-time plot for this car is given in the figure. What distance does the car cover in the first 4.0 seconds of it motion?
Compare and contrast the average kinetic energy of 0.5 L of coffee at 34°C, 0.5 L of coffee at 38°C, and 0.25 L of tea at 43°C. 4. Compare the thermal energy of 0.5 L of coffee at 38°C and 0.25 L of coffee at 38°C. 5.
A 2 kg mass passes through the origin (x=0) with initial velocity -3m/s to the left on a horizontal frictionless table, Find the values of x which the mass has zero acceleration
q1. an airtight box has a removable lid of area 1.00 10-2 m2 and negligible weight. the box is taken up a mountain
We have a hollow metallic sphere with charge -5.0 µC and radius 5.0 cm. We insert a +10-µC charge at the center of the sphere during a hole in the surface. What charge now rests on the outer surface of the sphere?
What should you report for the acceleration
A proton and an alpha particle are released from rest when they are 0.225nm {\rm nm} apart. Find the maximum speed of proton
During a rockslide, a 270kg rock slides from rest down ahillside that is 480m long and 300m high. How much mechanical energy is dissipated by the normal forceduring the slide down the hill
A person throws a rock straight up into the air. At the moment itleaves the person's hand it is going 33mph. When the rock reaches its peak, how fast is it going and whatis the magnitude and direction of its acceleration?
Explain what is the current in the cell during this period? Assume that the gold ions carry one elementary unit of positive charge.
a particle undergoes two displacements. the first has a magnitude of 128 cm and makes an angle of 113 degrees with the
Atmospheric pressure is about 1.0 105 Pa on average. What is the downward force of the air on a desktop with surface area 0.1 m2
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