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A swimming pool has dimensions 29 m x 34 m and a flat bottom, what is the total force due to the water on the bottom
Determine the pH and pOH for each of the following solutions: a)[OH^-]=1.0x10^-7 M b)[H3O^+]=4.2x10^-3 M c)[H3O^+]=.0001 M d)[OH^-]= 8.5x10^-9 M
The rate of flow of water through a horizontal pipe is 1.98 m3/min. Determine the speed of flow in m/s at a point
Iodine molecules dissociates into atoms after absorbing light of 4500 A.If one quantum of radiation is absorbed by each molecule, Find the KE of the iodine atoms
A ball of mass m=0.5 kg and radius r=0.02m is pushed against a spring of force constant 200N/m, What is the speed of the rolling ball when it leaves the spring
Are polar covalent single bonds generally stronger than pure covalent single bonds. Explain why.
High-speed photos of a 200?g flea jumping vertically show that the jump lasts 1.5ms and involves an average vertical acceleration of 110 g, What's the change in the flea's momentum during its jump
in the blood plasma, pH is maintained by the carbonic acid-bicarbonate buffer system. a)how is pH maintained when acid is added to the buffer system? b)how is pH maintained when base is added to the
What is the potential diffrence between two infinte parallel plates seperated by a distance d with uniform surface charge densities +s and -s, what is the voltage at positive infinity
adding a few drops of a strong acid to water will lower the pH appreciably. however, adding the same number of drops to a buffer does not appreciably alter the pH. why
A long coaxial cable length of L consists of a cylindrical metal sheath of radioys b surrounding a solid conducting wire with radious a. defining voltage to be zero at infinity
What is the minimal external voltage one must supply in order to perform the electrolysis of molten CaCl2 in the above question. Suggest a means for supplying this energy.
Compare the pH of a H2CO3 buffer that contains .10 M H2CO3 and .10 M NaHCO3 with another H2cO3 buffer that contains .15 M H2CO3 and .050 M NaHCO3.
A blue puck with a mass of 3.60×10?2kg , sliding with a speed of 0.180m/s on a frictionless, horizontal air table, makes a perfectly elastic, head-on collision with a red puck with mass m, Fin
An essential amino acid is one that you cannot make at a rate consistent with the normal growth and maintenance, which of the following sets consists of only essential amino acids
The motion of a 25.0 kg mass on the end of a string is uniform circular motion. The magnitude of the tangential velocity of the mass is 5.0 m/s, Calculate the angular momentum of the mass
acetic acid has a Ka of 1.8x10^-5. what is the pH of a buffer solution containing .15 M CH3COOH(acetic acid) and .15 M CH3COO^-?
A 250g steel ball and a 500g steel ball each hang from 3.0-m-long strings. At rest, the balls hang side by side, barely touching. To What angle does each ball rebound
A flywheel with a radius of 0.310m starts from rest and accelerates with a constant angular acceleration of 0.660rad/s2, Compute the magnitude of the tangential acceleration, the radial acceleration
A playground swing at its highest point during a child's play is 3.0 meters above the ground, Determine the torque exerted by gravity on a child on the swing when the swing is at the highest point of
Consider purchasing a new tire with a warranty of 6.4 x 10^7 meters. Calculate the thickness of the tread that will be worn away with each revolution of the tire
The patient has a deficiency of argininosuccinate lyase and has very high concentrations of blood glutamine and ammonium ion.
Two resistors, 80.0 and 64.0 , are connected in parallel. The current through the second resistor is 4.30 A, What is the total power supplied to the two resistors
what is the purpose of a buffer system? b)what is the purpose of NaNO2 in the buffer? c)how does the buffer react when some H3O^+ is added? d)how does the buffer react when some OH^- is added?
when the concentration of epinephrine or glucagon is high, they bind to receptors on adipose cell membrane and all of the following can be expected to occur