Physics Properties Of Matter Level: High School
A bimetallic strip , consisting of metal G on the top and metal H on the bottom , is rigidly attached to a wall , The coefficient of liner thermal expansion for metal G is greater than that of metal H . If the strip is uniformly heated, it will .a) Curve upward
b) Curve downward
c) Remain horizontal , but get longer
d) Bend in the middle.
e) None of the above.
Physics Properties Of Matter Level: High School
Archimedes’s Principle
A 2.9 kg rectangular air mattress is 2.46 m long , 0.511 m wide , and 0.172 m thick . What mass can it support in water before sinking ? Answer in units of kg .
Physics Properties Of Matter Level: High School
A water bed is 3.47 m on each vertical side and 31.9 cm high . The acceleration of gravity is 9.8 m/s^2 . The density of water is 1000 kg/m^3 . Find its weight . Answer in units of N .b) Find the pressure exerted on the floor when the bed rests in its normal position . Assume that the entire lower surface of the bed makes contact with the floor . Answer in units of Pa .
Physics Properties Of Matter Level: High School
The Mariana Trench, in the Pacific Ocean , is about 11.0 km deep . The acceleration of gravity is 9.81 m/s^2 . If atmosphere pressure at sea level is 1.01 x 10^5 Pa and the density of sea water is 1.025 x 10^3 kg/m^3 . how much pressure would a submarine need to be able to withstand to reach this depth ? Answer in units of Pa .
Physics Properties Of Matter Level: High School
A 79 kg woman balances on one heel of a pair of high-heeled shoes . The acceleration of gravity is 9.8 m/s^2 , If the heel is circular with radius 0.438 cm , What pressure does she exert on the floor ? Answer in units of N/m^2 .
Physics Properties Of Matter Level: High School
An air bubble of 32.0 cm^3 is at the bottom of a lake 10.0 m deep where the temperature is 5.00 c . the bubble rises to the surface where the temp is 20.0 c . Find the volume of bubble just before it reaches the surface .
Physics Properties Of Matter Level: High School
Gases
The escape velocity from the earth is ve = 1.12*10^4 m/s . At what temperature is the rms speed equal to thid for hydrogen (h2) helium (he) nitrogen (N2) oxygen (O2) carbon dioxide CO2 and water vapor H2O from these results when can you infer about the earths atmosphere .
Physics Properties Of Matter Level: High School
Bernoulli’s law
Water is pumped through a pipe of diameter 15.0 cm from the Colorado River up to Grand Canyon Village , on the rim of the canyon . The river is at 564 m elevation and the village is at 2096 m .a) What minimum pressure must the water be pumped to arrive at the village ?
b) If 4500 m^3 are pumped per day , What is the speed of the water in the pipe ?
c) What additional pressure is necessary to deliver the flow ? (Note : You may assume that the freefall acceleration and the density of the air are constant over the given range of elevations . )
Physics Properties Of Matter Level: High School
Air is trapped above liquid ethyl alcohol in a rigid container . If the air pressure above the liquid is 1.10 atm , determine the pressure inside a bubble 4.0 m below the surface of the liquid .
Physics Properties Of Matter Level: High School
Archimede’s Principle
If the density of gold is 19.3 x 10^3 kg/m^3 , what buoyant force does a 0.60 kg gold crown experience when it is immersed in water ?
Physics Properties Of Matter Level: High School
A circular window of 30 cm diameter is a submarine can withstand a maximum net force of 5.20 x 10^5 N . What is the maximum depth in a fresh water lake to which the submarine can go without damaging the window .
Physics Properties Of Matter Level: High School
A plastic block of dimensions 2.00 cm x 3.00 cm x 4.00 cm . It has a density of 1.25 g/cm^3 ? What is the maximum pressure it can exert on a horizontal surface ?
Physics Properties Of Matter Level: High School
Bernoulli’s law
Examine the schematic of the tower . Water flows in at the top to balance the water flowing out through the holes , so the height of the water in the tower stays fixed . Take state 1 at the top of the water in the tower and state 2 in the water just as it flows out of the hole .a) What is the pressure at states 1 and 2 ? Explain .
b) The water speed at state 1 can be taken to be zero as the level of water in the tower is constant . Using Bernoulli’s equation find the speed of the fluid at state 2 as it comes out of the hole ( this is speed of efflux ) .
c) If the holes are at heights of 2.0 cm , 12 cm and 22 cm above the surface of the water in the lower basin , and the top hole is 2.0 cm below the top of the water in the tower , calculate the speed efflux for each hole .
d) Calculate the range you would expect for each jet of water if the bottom hole is 2.0 cm from the surface of the water in the basin. Which one goes farthest (top , middle or bottom ) ?
Physics Properties Of Matter Level: High School
Archimedes principle
Ice is less dense than water so it floats in water . But the densities of ice and water are close , so most of an iceberg is submerged , even in salt water which is denser than pure water .a) For the specific gravities of ice and water given in the table on the next page what fraction of the volume of the ice cube in a glass of pure water will be above the surface ? If you used salt water of specific gravity from the same table what fraction of volume of the ice cube would be above the surface ?
b)If the cube’s volume is (1.0 cm)^3 What is the weight of the cube ?
c) What is the weight of the part of the cube above water level in pure water ?
d) What is the weight of the part below water level in pure water ?
e) What is the weight of the pure water displaced by the sunken part of the cube ? How does this compare with your answer to part (b) ? Does this make sense ?
Physics Properties Of Matter Level: High School
What is the “specific gravity” of a substance ? If a substance has a specific gravity of 2.5 what is its density in kg/m^3 ? What is its density in grams/cc ?