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a ball of mass 110 kg moving with speed of 20 ms hits a wall and bounces back with the same speed in the opposite
calculate the molarity of a solution made by dissolving 0140 mol na2so4 in enough water to form exactly 800ml of
a 2 c negative charge is attracted to a large well-anchored positive charge how much kinetic energy does the negatively
write a balanced chemical equation showing the formation of the salt na3po4 from the reaction of the appropriate strong
the metal plates of a tv tube are parallel and 12 mm apart the potential difference between them is 12 kva find the
1 what are the sources of crude oil and some of its components2 why is cracking an important technological process3
dirk pushes on a packing box with a horizontal force of 520 n as he slides it along the floor the average friction
a 30 mw laser produces a beam of light with a diameter of 26 mm shines its light on a perfectly absorbing surfacewhat
a string with both ends held fixed is vibrating in its third harmonic the waves have a speed of 186 ms and a frequency
1 mole of liquid water at 0degc and 1 atm pressure is irreversibly converted into steam at 200degc and 3 atm assume the
graph and label the following two functions fx 2 - 9 gx 2 9 1 describe the domain and range for each of these
a copper storage tank containing dilute h2so4 at ph 01 is blanketed with hydrogen at 1 atm calculate the maximum cu2
two equally charged spheres are located 2 cm away from each other when they are released they accelerate at 643 ms2 if
zn is immersed in a solution of cucl2 what is the reaction and at what activity ratio of zn2 cu 2 will the reaction
one string of a certain musical instrument is 800cm long and has a mass of 872 g it is being played in a room where the
each of three tuning forks a b and c has a slightly different frequency when a and b are sounded together they produce
the emf of a cell made of a zn anode and hydrogen cathode immersed in 05m zncl2 is 0590v what is the ph of the
a 37 l volume of ideal neon gas monatomic is at a pressure of 29 atmospheres and a temperature of 330 k the atomic mass
what is the ph of a solution formed by dissolving 0100 mol of an acid with a ka of 1750x10 to the -5th and 0200 mol of
a ball is thrown horizontally from an elevation of 1400 m above ground with a speed of 200ms where is the ball after
a small ball is attached to one end of a spring that has an unstrained length of 0179 m the spring is held by the other
start with a liquid labeled 2000ml hcl aq you are able to reach equilibrium at ph 7000 through titration by adding 1425
in a large centrifuge used for training pilots and astronauts a small chamber is fixed at the end of a rigid arm that
a light ray is incident from air with n 1 on a material with n 15 as shown in the diagram below here 38degwhat is
a plank 200 cm thick and 130 cm wide is firmly attached to the railing of a ship by clamps so that the rest of the