Physics Properties Of Matter Level: High School
Archimedes Principle
A uniform block of height 0.180 m , floats in turpentine of density 870.0 kg/m^3 . The bottom of the block is 0.170 m below the surface of the turpentine .(a) What is the density of the block ?
(b) Ethyl alcohol with a density of 791.0 kg/m^3 is poured slowly over the block until the block is totally immersed . Assume that the two liquids do not mix . How much does the depth to which the block immersed in the turpentine change ? For convention use positive as meaning more of the block is immersed in the turpentine and negative as less .
Physics Properties Of Matter Level: High School
Archimedes Principle
A recreational (open) hot air balloon (ie, P inside is approximately P outside) has a volume of 2339 m^3 when fully inflated . The total weight of the balloon , basket , ballast and pilot is 1852.2 N (417 lbs). By how much must the density of the air in the balloon be smaller than that of the surrounding atmosphere in order to keep the balloon floating level near the ground ?
Physics Properties Of Matter Level: High School
Archimedes Principle
An object with a density of 431.0 kg/m^3 and a mass of 859.0 kg is thrown into the ocean . Find the volume that sticks out of the water . (use P seawater = 1024 kg/m^3)
Physics Properties Of Matter Level: High School
Archimedes Principle
A geologist finds that a moon rock whose mass is 7.40 kg has an apparent mass of 4.20 kg when submerged in water . What is the density of the rock ?
Physics Properties Of Matter Level: High School
A fisherman and his young niece are in a boat on a small pond . Both are wearing life jackets . The niece is holding a large floating helium filled balloon by a string . Consider each action below independently and indicate whether the level of water in the pond , Rises , Falls , is Uncharged or Can’t tell .True or False – The niece finds a cup and bails some water out of the bottom of the boat .
True or False –The fisherman lowers the anchor and it hangs one foot above the bottom of the pond .
True or False – The fisherman lowers himself in the water and floats on his back .
True or False – The niece pops the balloon
True or False – The fisherman knocks the tackle box overboard and it sinks to the bottom .
True or False – The niece gets in the water and pops the floating helium balloon .
Physics Properties Of Matter Level: High School
Pressure
In a scuba diving , a regular is used so that pressure of the air the diver breathes is close to that of the ambient water . A reckless swimmer decides to use a hose sticking out of the surface to breathe underwater while diving in a lake . When the air pressure in the lungs is at a pressure of around 0.150 atmospheres below the ambient pressure , lung injury may occur . Find the depth at which the swimmer would experience such a pressure differential .
Physics Properties Of Matter Level: High School
Pascals Law
The maximum gauge pressure in a hydraulic lift is 17.7 atm . What is the largest size vehicle (kg) it can lift if the diameter of the output is 24.7 cm ?
Physics Properties Of Matter Level: High School
Pressure
An evacuated spherical diving bell containing a camera is in the ocean at a depth of 109 m. It has a flat , transparent , circular port with a diameter of 19.7 cm . Find the magnitude of the total port(Use r seawater) = 1025 kg/m^3) .
Physics Properties Of Matter Level: High School
Pressure
What is the difference in air pressure between the top and the bottom of the Chrysler Building in New York City ? It is 319 m tall and is located at sea level . Express your answer as a fraction of atmospheric pressure at sea level .
Physics Properties Of Matter Level: High School
Pressure
The four tires of an automobile are inflated to a gauge pressure of 2 .09E+5 Pa . Each tire has an area of 0.0233 m^2 in contact with the ground . Determine the weight of the automobile .
Physics Properties Of Matter Level: High School
Stoke’s Law
A patient is given an injection with a hypodermic needle 3.2 cm long and 0.28 mm in diameter . Assuming the solution being injected has the same density and viscosity as water at 20 degreeC , find the pressure difference needed to inject the solution at the rate of 1.3 g/s .
Physics Properties Of Matter Level: High School
Stoke’s Law
The pulmonary artery , which connects the heart to the lungs , has a inner radius of 2.1 mm , a length of 8.5 cm , and a pressure difference of 450 Pa over the length .(a) Find the rate at which blood flows through the pulmonary artery .
(b) If the radius of artery is reduced by 13% , what is the ratio of the reduced blood flow rate to the original flow rate ? Assume that all other properties of the artery remain unchanged .
Physics Properties Of Matter Level: High School
Bernailli’s theorem
On a vacation flight , you look out the window of the jet and wonder about the forces exerted on the window . Suppose the air outside the window moves with a speed of approximately 150 m/s shortly after takeoff , that the air inside the plane is at atmospheric pressure and that the density of the air inside and outside the plane is 1.29 kg/m3 .(a) Find the pressure differences between the inside and outside of the window
(b) If the window is 25 cm by 43 cm , find the force exerted on the window by air pressure .
Physics Properties Of Matter Level: High School
Bernailli’s theorem
Suppose that a man is able to exhale 1.3 liters of air through his mouth in 2 seconds .(a) If he blows air at this rate through a drinking straw with a diameter of 0.65 cm , What is the speed of air in the straw ?
(b)If the air from the straw in part (a) is directed horizontally across the upper end of a second straw that is vertical , to what height does water rise in the vertical straw ? (Take the density of air to be 1.29 kg/m3)
Physics Properties Of Matter Level: High School
Equation of Continuity
The buildup of plaque on the walls of an artery may decrease its diameter from 1.1 cm to 0.89 cm . The speed of blood flow was 17 cm/s before reaching the region of plaque buildup .(a) Find the speed of blood flow within the plaque region .
(b) Find the pressure drop within the plaque region. ( Assume that blood has the same density as water .)
