Physics Force & Laws Of Motion Level: Misc Level
An airplane flies on a level path. There is a pressure difference of 520 Pa between the lower and upper surfaces of the wings.The area of each wing surface is about 170m2. The air moves below the wings at a speed of 80. 1 m/s. a) Estimate the weight of the plane. (b)Estimate the air speed above the wings.
Physics Properties Of Matter Level: Misc Level
An aluminum cylinder weighs 1.01 N. When this same cylinder is completely submerged in alcohol, the volume of the displaced alcohol is 3.90 10-5 m3. The apparent weight of the cylinder when completely submerged is 0.740 N. what is the specific gravity of the alcohol?
Physics Properties Of Matter Level: Misc Level
If the average volume flow of blood through the aorta is 9.4 10-5 m3/s and the cross- sectional area of the aorta is 3.2 10-4m2, what is the average speed of blood in the aorta?
Physics Properties Of Matter Level: Misc Level
The maximum pressure most organisms can survive is about 1000 times atmospheric pressure.Only small,simple organisms such as tadpoles and bacteria can survive such high pressures.What then is the maximum depth at which these organisms can live under the sea (assuming that density of seawater is 1021 kg/m3)?
Physics Properties Of Matter Level: Misc Level
At the surface of a freshwater lake the air pressure is 1.0 atm. At what depth under water in the lake is the water pressure 4.5 atm?
Physics Force & Laws Of Motion Level: Misc Level
A block of mass 5.00 kg rests on a horizontal surface where the coefficient of kinetic friction between the two is 0.200. A string attached to the block is pulled horizontally, resulting in 2.00 m/s^2 acceleration by the block.Find the tension in the string. (g=9.80 m/s^2)
Physics Force & Laws Of Motion Level: Misc Level
A 9.0 kg hanging weight is connected by a string over a pulley to a 5.0 kg block sliding on a flat table. If the coefficient of sliding friction is 0.20,find the tension in the string.
Physics Force & Laws Of Motion Level: Misc Level
A 70.0 kg man jumps 1.00 m down onto a concrete walkway. His downward motion stops in 0.0200 seconds. If he forgets to bend his knee, what force is transmitted to his leg bones?
Physics Properties Of Matter Level: Misc Level
Assume 3 moles of a diatomic gas has an internal energy of 10 kJ. Determine the temperature of the gas after it has reached equilibrium.
Physics Modern Physics Level: University
Mass Energy RelationshipA photon ( traveling in the +X direction) strikes a stationary electron and recoils back in the direction it came from ( -X). What direction must the electron be traveling in after the collision and why?
Physics Modern Physics Level: University
Mass Energy Relationship1 kg of gasoline when burned in oxygen will give off about 4 x 10^7 joules of heat. According to Einstein any mass has an equivalent energy of E = mc^2. How many kgs of gasoline would have to burn ( with oxygen) to make the same amount of energy that Einsteins theory predicts that a single kg is equivalent to?
Physics Modern Physics Level: University
Time DialationWhen people are traveling at different speeds their clocks appear to run at different rates from the perspective of the other person. If one person is on a stationary platform while the other is on a ship moving rapidly past the platform whose clock is running correctly?
Physics Modern Physics Level: University
Theory of relativityA nearby star is 4.3 light years away. If a rocket leaves for that star and travels at a speed of .98 times the speed of light ( the earth and star are stationary with respect to each other)
(a) Determine the time the trip from the earth to the star would appear to take from the perspective of both the person on earth and in the ship.
(b)Determine how far the ship will appear to have traveled during its trip from the perspective of both people. ( Hint- consider length contraction)
(c) Determine the apparent velocity of the ship from the perspective of both people.
Physics Current Electricity Level: University
MeasurementWrite nodal equation for the networks and is symmetry present.
Question Diagram
Physics Current Electricity Level: University
MeasurementApply nooal analysis to the network.
Question Diagram
