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a boy pulls a 20 -kg box with a 50- n force at 37 degreeabove a horizontal surface the coefficient of kinetic
a 720-kg bungee jumper jumps from a bridge she istied to a bungee cord whose unstretched length is 120 m and fallsa
calculate the ph of a solution containing 035m lactic acid and 025m sodium lactate is this a buffered solution explain
a small particle with a mass of 2 kg carrying a charge of 2nc is at the surface of a charged spherical conductor of
the plates of a parallel plate capacitor are separated byd 10 cm the potential of the negative plate is 0 vand the
the gravitational forces of earth and the moon are attractive so there must be a point on a line joining their centers
calculate the ph of a solution containing 020m in hcn and 012m nacn is this a buffered
the dielectric strength of air is 30x106 vm and that of neoprene rubber is 12x107 vm a certainair-gap parallel-plate
given a solution of ammonium chloride what additional reagent or reagents are needed to prepare a buffer from the
a wheel 400 cm in diameteraccelerates uniformly from 200 rpm to385 rpm in 50 s how far will a point on the edge of the
1-consider the element with the electron configuration kr5s2 4d10 5p3 this element isa an alkali metal b a
a power supply that provides a voltage of 300vmiddotsin317middott where t is in seconds is connectedacross a resistor r
a mixture of the compounds sodium bromide and calcium oxide contains 234 g of calcium oxide and is 691 by mass calcium
a 70 kg box is raised from rest adistance of 10 m by a vertical forceof 120 na find the work done by the forcejb find
the drawing shows a point charge q 058microc and two locations a and b what is the electric potential differencevb -
describe how you would prepare 1000 l of 005m hepes buffer ph 745 in the lab you have pure hepes a ph meter 100 m hcl
the displacement vector for a 150 second interval of a jetairplanes flight is 215e3 -2430 ma what is the magnitude of
calculate the equilibrium constant for the weak base ch3nh2 if a solution of the base with an initial concentration of
when 150 ml of 0400 m h are mixed with 200 ml of 0500 m oh- the final temperature of the solution is 265degc what was
household bleach is an aqueous solution of sodium hypochlorite what is the molarity of a bleach solution that contains
a 16lb wooden crate sits on a wooden board inclined at 20degreesa whats the normal forceb what is the static friction
energy stored in electric and magnetic fields a magnetic field has a magnitude of 10 t what is the magnitude of an
a bullet of mass m is fired with speed vo toward a steel block of mass m which is hanging from a massless rod of length
the measured dipole for a binary molecule is 053 d with a bond length of 219 pm what is the separated charge in
at a temperature of 250k the molecules of an unknown gas z have an average velocity equal to that of hi at 500k what is