Physics Properties Of Matter Level: Misc Level
Which of the following statements is true?
a. At any given point in the fluid, the velocity is constant in time.
b. Streamline flow occurs when there are sharp obstacles in the path of a fast- moving fluid.
c. Streamline flow is described by Pascal's principle.
d. Streamline flow is described by Archimedes, principle.
e. The velocity vectors are the same for all particles in the fluid.
Physics Properties Of Matter Level: Misc Level
A balloon is released from a tall building. The total mass of the balloon including the enclosed gas is 2.0 kg. Its volume is 5.0 m3. The density of air is 1.3 kg /m3. What is the average density oy the balloon?
Physics Properties Of Matter Level: Misc Level
A small sculpture made of brass (p brass = 847 kg/ m3 ) is believed to have a secret central cavity. The weight of the sculpture in air is 15.76 N. When it is submerged in water, the weight is 13.86 N. What is the volume of the secret cavity?
Physics Properties Of Matter Level: Misc Level
A balloon inflated with helium gas (density = 0. 2 kg \ m3 )has a volume 6 *10 -3 m3. If the density of air is 1.3 kg / m3 , what is the buoyant force exerted on the balloon?
Physics Properties Of Matter Level: Misc Level
The average density of the material in intergalactic space is approximately 2.5* 10-27 kg \m3. What is the volume of a gold sample, P= 19300 kg \ m3, that has the same as 8.0 * 1024 m3 of intergalactic space?
Physics Properties Of Matter Level: Misc Level
The density of mercury is 1.36 * 104 kg \ m3 . What is the mass of a 4. 00 * 104 -m3 sample of mercury?
Physics Properties Of Matter Level: Misc Level
You have probably observed that a steady stream of water flowing out of a faucet gets smaller the farther it gets from the faucet. Why does this happen?
Physics Properties Of Matter Level: Misc Level
High cholesterol in the blood can cause fatty deposits called plaques to from on the walls of the blood vessels.Suppose a plaque reduces the effective radius of an artery by 25 %. By what percentage does this partial blockage affect the speed of the blood through the artery ?
Physics Properties Of Matter Level: Misc Level
To stir a mixture of liquids consistently and gently, a biologist designs a simple mechanical system consisting of a horizontal spring attached to a beaker on the slippery Teflon surface. She pours two liquids with a total mass of 100 - g into the beaker, which has a mass of 50.0 -g. She then pulls on the beaker, stretching the spring. On releasing the beaker from rest ( t =0), she sets the system in motion with an amplitude of 5. 00- cm. To avoid spilling and to promote gentle mixing, the frequency is designed to be exactly 0.300 -Hz.
(a) What is the required spring constant?
(b) What is the displacement of the beaker from equilibrium at time t = 2.00 s?
Physics Properties Of Matter Level: Misc Level
A garage lift has input and output ( lift ) pistons with diameters of 10 - cm, respectively. The lift is used to hold up a car with a weight of 1.4 x 10 ^ 4 N.
(A) What force is applied to the top of the input piston?
(b) What is the pressure applied by the water column to the bottom of the input piston?
Physics Properties Of Matter Level: Misc Level
How high should the pressure head be if water is to come from a faucet at a speed of 7.33 m/s ? lgnore viscosity.
Physics Properties Of Matter Level: Misc Level
What force on the plunger would be needed to push fluid into a vein where the gauge pressure is 17.8 mm -Hg? Answer for the instant just before the fluid starts to move.
Physics Properties Of Matter Level: Misc Level
A 2.47 N force is applied to the plunger of a hypodermic needie. If the diameter of the plunger is 1.11 cm and that of the needle 0. 196 mm, with what force does the fluid leave the needle?
Physics Properties Of Matter Level: Misc Level
If wind blows at 27.8 m/s over your house, what is the net force on the roof if its area is 237 m^2?
Physics Properties Of Matter Level: Misc Level
A 2.70 kg piece of wood (specific gravity =0.50 ) floats on water. What minimum mass of lead, hung from it by a string, will cause it to sink?
