Physics Force & Laws Of Motion Level: Misc Level
A 10 kg block is moving at a constant speed of 6 m/s horizontally on a rough surface. If the force of friction is 20 N, approx how far will the block travel before it stops?
Physics Current Electricity Level: Misc Level
What is the current in a 60.0 W bulb when connected to a 120- V emf?
Physics Current Electricity Level: Misc Level
What is the resistance between points A and B in the following?
Physics Electrostatics Level: Misc Level
Find the equivalent capacitance between points A and B for the three capacitors in parallel in the following?
Physics Current Electricity Level: Misc Level
An aluminum bus bar has the dimensions 0.50 cmx 2.0 cm x 20.0 m. What is the resistance at 20% C?
Physics Current Electricity Level: Misc Level
A silver wire of diameter 1.0 mm carries a current of 150 mA. The density of conduction electrons in silver is 5.8x 1028 m-3. How long (on average) does it take for a conduction electron to move 1.0 cm along the wire?
Physics Current Electricity Level: Misc Level
Two electrodes are placed in a calcium chloride solution and a potential difference is maintained between them. If 3.8x1016 Ca2+ and 6.2 x 1016 CI ions per second move in opposite directions through an imaginary area between the electrodes, what is the current in the solution?
Physics Heat & Thermodynamics Level: Misc Level
Zirconium tungstate is an unusual material as it,s volume shrinks with an increase in temperature for the temperature range 0.3 k to 1050 k (where it decomposes). The volumetric coefficent of thermal expansion is -26.4 x 10-6/k. What is the ratio v/v0 for the above temperature range (in percentage)?
Physics Heat & Thermodynamics Level: Misc Level
A metal rod 40.0000 cm long at 40%C is heated to 60% C. The length of the rod is then measured to be 40.0105 cm. What is the coefficient of linear expansion of the metal in units of /%C?
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.It,s volume is 5.0 m3.The density of the air is 1.3 kg/m3. will the balloon rise, fall, or remain stationary and why?
Physics Properties Of Matter Level: Misc Level
The density of ice is 0.92 g/cm3,and the density of seawater is 1.03 g/cm3. A large iceberg floats in the Arctic water. What fraction of the volume of the iceberg is exposed?
Physics Properties Of Matter Level: Misc Level
A ballon inflated with helium (density=0.2 kg/m3) has a volume of 6x10-3 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
A force of 250N is applied to a hydraulic jack that is 0.01 m in diameter. If the piston which supports the load has a diameter of 0.10 m, approx how much mass can be lifted by the load piston? Disregard any height differences between pistons.
Physics Properties Of Matter Level: Misc Level
The largest barometer built was oil- filled and had a height of 12.2 m.Assuming a pressure of 1.013 x 105 Pa, what was the density of the oil used in the barometer?
Physics Properties Of Matter Level: Misc Level
A submarine is operating at 100 m below the surface of the ocean.If the air inside is maintained at a pressure of 1.0 atmosphere, what is the magnitude of the force that acts on the regular hatch 2.0 m x 1.0 m on the deck of the submarine?
