Physics Principles with Application (Giancoli) Flashcards
Estimate the pressure needed to raise a column of water to the same height as a 46-m-tall pine tree.
4.5x10^5 Pa
Estimate the pressure exerted on a floor by (a) one pointed heel of and
(b) one wide heel of area 16 cm2.
The person wearing the shoes has a mass of 56 kg.
a. 6.1x10^6 N/m^2
b. 1.7x10^5 N/m^2
What is the difference in blood pressure (mm-Hg) between the top of the head and bottom of the feet of a 1.75-m-tall person standing vertically?
(a) Calculate the total force of the atmosphere acting on the top of a table that measures;
(b) What is
the total force acting upward on the underside of the table?
How high would the level be in an alcohol barometer at normal atmospheric pressure?
In a movie, Tarzan evades his captors by hiding under water for many minutes while breathing through a long, thin reed. Assuming the maximum pressure difference his lungs can manage and still breathe is calculate the deepest he could have been.
The maximum gauge pressure in a hydraulic lift is 17.0 atm. What is the largest-size vehicle (kg) it can lift if the diameter of the output line is 25.5 cm?
The gauge pressure in each of the four tires of an automobile is 240 kPa. If each tire has a “footprint” of (area touching the ground), estimate the mass of the car.
(a) Determine the total force and the absolute pressure on the bottom of a swimming pool 28.0 m by 8.5 m whose
uniform depth is 1.8 m.
(b) What will be the pressure against the side of the pool near the bottom?
A house at the bottom of a hill is fed by a full tank of water 6.0 m deep and connected to the house by a pipe that is 75 m long at an angle of 61° from the horizontal.
(a) Determine the water gauge pressure at
the house.
(b) How high could the water shoot if it came
vertically out of a broken pipe in front of the house?
Water and then oil (which don’t mix) are poured into a tube, open at both ends. They come to equilibrium. What is the density of the oil?
[Hint: Pressures at points a and b are equal. Why?]
How high would the atmosphere extend if it were of uniform density throughout, equal to half the present density at sea level?
Determine the minimum gauge pressure needed in the water pipe leading into a building if water is to come out of a faucet on the fourteenth floor, 44 m above that pipe.
A hydraulic press for compacting powdered samples has a large cylinder which is 10.0 cm in diameter, and a small cylinder with a diameter of 2.0 cm. A lever is attached to the small cylinder as shown. The sample, which is placed on the large cylinder, has an area
of What is the pressure on the sample if 320 N is applied to the lever?
An open-tube mercury manometer is used to measure the pressure in an oxygen tank. When the atmospheric pressure is 1040 mbar, what is the absolute pressure (in Pa)
in the tank if the height of the mercury in the open tube is
(a) 18.5 cm higher,
(b) 5.6 cm lower, than the mercury in the tube connected to the tank?
