6154

Physics Properties Of Matter Level: Misc Level

the height of the Eifel tower is 321 m during the summer when the temperature is 29.7 celcius. what is the magnitude of the change in the height of the tower, when the temperature cools down to-19.8 celcius during the winter? the coefficient of linear expansion of the towers material is 1.10*10^-5 1/celcius.(in cm)

a)1.75*10^1 b)2.32*10^1 c)3.09*10^1 d)4.11*10^1 e)5.47*10^1 f) 7.27*10^1 g) 9.67*10^1 h)1.29*10^2


6106

Physics Properties Of Matter Level: Misc Level

Why do metals exhibit the photoectric effect more easily than other materials ?


6099

Physics Properties Of Matter Level: Misc Level

Caculate the specific heat 12.7 g of an unknown metal whose temprature increased 25.0 Ceisius degrees when 80.0 J of heat energy was absorbed by the metal


6070

Physics Properties Of Matter Level: Misc Level

A bee of mass 1g lands on the end of a horizontal twig, which starts to oscillate up and down with a period of 1 s. Treat the twig as a massless spring, and estimate its force constant.


6000

Physics Properties Of Matter Level: Misc Level

 How tall must a column of mercury, p-1.36x 104 kg /m3, be to exert a pressure equal to the atmosphere?


5999

Physics Properties Of Matter Level: Misc Level

An iron bar 2.6 m long at room temperature (20%C).is heated uniformly along its length until its temperature reaches 1050%C. How much longer is the bar at the higher temperature?The coefficient of linear expansion of iron is 1.2x10-5(%C)~1.


5983

Physics Properties Of Matter Level: Misc Level

An incompressible fluid moves through a pipe from left to right as shown above . The pipe narrows from a diameter of 5 cm at" A" to a diameter of 3 cm at " B" (Assume non- viscous laminar flow) *equal to *morethan*less than-The amountof fluid that passes"A" in one second is ---the amount of fluid that passes"B"in one second.-The velocity of the fluid at "A" is the velocity of the fluid at "B"-Then density of the fluid at "A"is the density of the fluid at "B"-The pressure at "A" is -- the pressure at "B"


5981

Physics Properties Of Matter Level: Misc Level

The density of ice is 920 kg/m3, and that of sea water is 1030 kg/m3. Water fraction of the total volume of an iceberg is exposed?


5980

Physics Properties Of Matter Level: Misc Level

Water is to be pumped to the top of the Empire State Building ,which is 1200 ft high .What gauge pressure is needed in the water line at the base of the building to raise the water to this heigh?


5979

Physics Properties Of Matter Level: Misc Level

If 1.0 cubic meters of concrete weighs 5.00 E +4 N, what is the height of the tallest cylindrical concrete pillar that will not collapse under its own weight? The compression strength of concrete (the maximum pressure that can be exerted on the base of the structure)is 1.70 E+7 Pa.


5978

Physics Properties Of Matter Level: Misc Level

A stainless steel orthodontic wire is applied to a tooth, as shown in the figure above. The wire has an unstretched length of 2.9 cm and a diameter of 0.23 mm.The wire is stretched 0.1 mm.Young,s modulus for stainless steel is 1.80 E+11 Pa. What is the tension in the wire?-What is the magnitude of the force on the tooth due to the wires?Disregard the width of the tooth.


5977

Physics Properties Of Matter Level: Misc Level

For safety in climbing, a mountaineer uses a nylon rope that is 50 m long and 1 cm in diameter. When supporting a 84-kg climber, the rope elongates 1.1 m. Find its Young,s modulus.


5976

Physics Properties Of Matter Level: Misc Level

When water  freezes,it expands about 9%.What would be the pressure increase inside your automobile engine block if the water in it froze?( The bulk modulus of ice is 2.00E+9 N/2.)


5975

Physics Properties Of Matter Level: Misc Level

What is the buoyant force in N on a 5.7 m3 helium balloon in air at standard conditions? The density of air is 1.3 kg/m3.


5974

Physics Properties Of Matter Level: Misc Level

A tube carries  water on the level in a nonturbulent flow condittion .The flow, F, is 0.17. 10-4 m3/s. What is the velocity of the water in m/s when it crosses a part of the tube which has a diameter, D,of 5.3 cm?


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