Wednesday
May 22, 2013

# Posts by Brandon

Total # Posts: 883

Calculus
integral of cscx^(2/3)(cot^3)x i know that cot^2x is csc^2(x)-1, but i just don't understand how to solve the cscx^(2/3), any help? i also know that its trig integrals/substitution...

Chemistry
brOH

physics?
A body in vertical free fall covers half its total distance in the last second of its fall. The total time taken by the body to cover the entire (whole) path is A 1.414 s B 1.732 s C 2.414 s D 3.414 s

physics?
A falling rubber ball of mass m hits the ground with a speed of v and bounces straight up again after a 20% speed loss during the collision. The magnitude of the impulse it receives from the ground is A 0.2mv B 0.8mv C mv D 1.8mv

physics?
The minute hand of a bedside clock is 2.5 cm long. In order for the clock to keep proper time, the minute hand should maintain an average angular velocity of

Physics
A rectangular plank with mass m kilograms measures x metres wide by y metres high. It is clamped at its very left edge, one third of the way down from the top, as shown. To keep the plank level, the clamp must exert a torque of

physics?
A heavy steel ball S is suspended by a string from a block of wood W, as shown in the sketch. The entire system is dropped from a height. Neglecting air resistance, the tension in the string is equal to A zero B the weight of S C the difference of the masses of S and W D the d...

Physics
An unknown mass is suspended by a string from one end of an uniform stick which has a mass of 120 g. In order to balance the stick, it must be supported one third of its length away from the mass. the unknown mass is therefore?

Chemistry
A tank contains Ar at 1.33 atm and Kr at 3.59 atm. We add enough Xe to give a total pressure of 6.3 atm. What is the partial pressure of the Xe?

Chemistry
A 3.43 L flask is filled with carbon monoxide at 27 °C until the pressure is 8.31 atm. Calculate the total pressure after 2.09 moles of carbon dioxide has been added to the flask. (R=0.082 L-atm/K mol)

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