Physics Electrostatics Level: Misc Level
Two large, parallel, conducting plates are 17 cm apart and have charges of equal magnitude and opposite sign on their facing surfaces. An electroststic force of 4.8 x 10-15 N acts on an electron placed anywhere between the two plates. ( Neglect fringing.) (a) Find the electric field at the position of the electron. (b) What is the potential differnce in volts between the plates
Physics Electrostatics Level: Misc Level
What are (a) the charge and (b) the charge density on the surface of a conducting sphere of 0.15 m whose potential is 180 V (with V=0 at infinty)?
Physics Modern Physics Level: Misc Level
Two electrons are fixed 2.5 cm apart.Another electron is shot from infinity and stops midway between the two. What was its initial speed in meter per second?
Physics Electrostatics Level: Misc Level
An infinite line of charge produces a field of magnitude 4.1 x 104 N/C at a distance of 1.5 m. Calculate the linear charge density
Physics Properties Of Matter Level: Misc Level
The air in a living room with a 4.0 m x 5.0 m floor and a 3.0 m high ceiling has a density of 1.20 kg/m3 and a pressure of 1 atm. Find:
(a) The weight of the air
(b) The total downward force on the surface of the floor due to air pressure.
Physics Properties Of Matter Level: Misc Level
Water enters a house through a pipe with an inside diameter of 2.0 cm at an absolute pressure of 4 atm.A 1.0 cm diameter pipe leads to the second floor bathroom 5.0 m above. When the flow speed at the inlet pipe is 1.5 m/s, find the flow speed, pressure and the volume flow rate in the bathroom.
Physics Kinematics Level: Misc Level
A cheetah can run at approximately 100 km/hr and a gazelle at 80.0 km/hr. If the Gazelle has a 70.0- m head start, how long in seconds until the cheetah catches the gazelle?
Physics Measurements Level: Misc Level
A 15-ft tall street -lamp shines out to an angle of 27 degrees from the vertical in all directions. What is the total area illuminated?
Physics Kinematics Level: Misc Level
A parachutist jumps out of an airplane and accelerates with gravity to a max imum speed of 58.8 m/s in 6.00 seconds. She then pulls the rip cord and, after a 4.00 second speed constant deceleration , descends at 10.0 seconds, reaching the ground, From what height did she jump?
Chemistry Mole Concept Level: Misc Level
Estimate the molecular weight of a polymer if a 100 mL solution of 6.5 g of polymer in toluene has osmotic pressure of 0.044 atm at 27 degree celcius.
Chemistry Inorganic Chemistry Level: Misc Level
Arrange the following in order of increasing melting points.Cs, BaCI, Cdiamond , H2, HF
Chemistry Physical Chemistry Level: Misc Level
Using the Clausius Clapeyron determine the vapor pressure of water at 50 degree celcuis. The molar heat of evaporation of water is 40.7 kJ/mol
Chemistry Physical Chemistry Level: Misc Level
How much heat is released when 40 g of steam at 250 degrees celcisus cools down and condenses to water at 30 degrees celcius? (Specific Heat of H2O (I)4. 18 J/g degree celcius, Specific Heat of H20 (g)= 2.03 J/g degree celcius, heat of evaporation of H2O (I) is 2.260 kJ/g)
Chemistry Inorganic Chemistry Level: Misc Level
A mixture of Ar CH4,H2, CO, and PCL5 is released in back of the classroom. Which gas reaches the front of the classroom first?
Physics Current Electricity Level: Misc Level
In the figure R1 =81 Q, R2=67 Q, and the ideal batteries have emfs E1 =8.0 V, E2 =5.0 V, and E3 =4.0 V. Find (a) the current in R1, (b) the current in R2, and (c) the potential difference between points a and b.
