Chemistry Organic Chemistry Level: Misc Level
An unknown is either 2- methyl -2- propanol or 2-methyl-1 propanol. Addition of a few drops of dichromate solution (orange as a strong oxidizing agent) to the unknown results in a green solution(the color after it has been reduced).What is the identity of theunkown?Explain.
Chemistry Organic Chemistry Level: Misc Level
Caculate the pH of a solution that is 0.050 M in Carbonic acid 0.075 M in Potasiumhydrogencarbonate. Ka=4.45x10-7. Now add 0.0064 moles HCI. What is the new pH?
Chemistry Mole Concept Level: Misc Level
Compute the molarity of 15.0 mI of nitric acid solution that required 35.9 mI of 0.0480 M KOH for complete neutralization.
Chemistry Physical Chemistry Level: Misc Level
What volume of physiological saline (0.900% w/v NaCI) can be prepared from 90.0 mI of 2.75% w/v NaCI solution?
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
Physics Current Electricity Level: Misc Level
The turns ratio inside a transformer is 13:1 and is used with a 120V. If the transformer draws 0.350 A what is the voltage and current supplied from the transformer and how much power is delivered?
Physics Current Electricity Level: Misc Level
A resonant circuit in a radio receiver is tuned to a station when the inductor has a value of .200 mH and the capacitor has a value of 30.0 pF. Find frequency and wavelength sent out by the station.
Physics Current Electricity Level: Misc Level
In centain RLC circuit, the rms current is 6.0 A, rms voltage is 240 V and the current leads the voltage by 53 degrees. What is the total resistance of the circuit? Calculate the total reactance X(L)-X(C) and find the average power delivered to the circuit.
Physics Current Electricity Level: Misc Level
A 50 ohm resistor is connected in series to a 15.0 micro Farraday capacitor and a 60.0 herz, 120 v source.Find the current and value of the inductor that must be inserted in the circuit to reduce this same current to 1/2.
Physics Current Electricity Level: Misc Level
An ac voltage source has an output of delta V=150 sin 377t. Find the rms voltage output and frequency of the source.Find the voltage at t=1/120 sec. Find the maximum current in the circuit when the generator is connected to a 50.0 ohm resistor.
Physics Force & Laws Of Motion Level: Misc Level
(a) Calculate the momentum of a 2000 Kg elephant charging a hunter at a speed of 7.50 m/s.(b)Compare the elephant,s momentum with that of a 0.0400 Kg bullet fired at a speed of 600 m/s. (c) What is the momentum of the 90.0 Kg hunter running at 7.40 m/s affter missing the elephant?
Physics Force & Laws Of Motion Level: Misc Level
A cruise ship with a mass of 1.00x 10 to the 7 th power kg strikes a pier at a speed of 0.750 m/s, and comes to rest after traveling 6.00 m, damaging the ship, the pier, and the tugboat captain,s finances. Calculate the average force exerted on the pier using the concept of impulse.(Hint:Fist calculate the time it took to bring the ship to rest.)
Physics Force & Laws Of Motion Level: Misc Level
A bullet is accelerated down the barrel of a gun by hot gases prodouced in the combustion of gun power, What is the average force exerted on a 0.0300 kg bullet to accelerate it to a speed of 600 m/s in a time of 2.00 x10 to the negative 3s?
Physics Force & Laws Of Motion Level: Misc Level
A bowling ball is released with a velocity of 6 m/s but with no angular velocity as it touches the alley floor. Compute the distance traveled by the ball before it begins to roll without slipping. The coefficient of friction k between the ball and the floor is such that k*g=2 m/s/s. Give your answer in meters
Physics Circular Motion Level: Misc Level
The uniform 12-ft pole is hinged to the truck bed and released from the vertical position as the truck starts from rest with an acceleration of 3.8 ft/s/s. If the acceleration remains constant during the motion of the pole, calculate the angular velocity of the poleas it reaches the horizontal position .Assume g=32.2 ft/s/s. Give your answer in inverse seconds
