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at its closest approach mars is 56 million km from earth how long would it take to send a radio message from a space
a 0400-kg ball approaches a very massive wall at 200 ms perpediculat to wall and rebounds with 700 of its inital
where can be green brown or purple examine the three figures below representing equilibrium concentrations in this
a 120 kg ball and a 400 kg ball are connected by a 740 cm long massless rigid rod the structure rotates about its
a block of mass 0489 kg is placed on the end of a spring which has a stiffness of 337 nm it is pulled down 460 cm and
an ideal gas at 300k has a volume of 15 liters at 15atm calculate the final volume of the system the work done by the
ethylene glycol c2h4oh2 is a colorless liquid used as automobile antifreeze if the density at 20 degrees celsius of a
a block with a mass of m is resting on a 20 degree slope the block has coefficients of friction 081 and 055 with the
consider a wheatstone bridge suppose a resistance rx is istalled as the unknown and the bridge is balanced giving a
find the equilibrium partial pressures of a and b for each of the following different values of kpconsider the
the cell potential of the following electrochemical cell depends on the gold concentration in the cathode half-call
a sample of carbon monoxide co occupies a volume of 350 ml and exerts a pressure of 1020 torr at 25degc if the volume
a string that is under 470n of tension has linear density 580gm a sinusodial wave with amplitude 270cm and wavelength
a block of mass m 210 kg slides down a 300deg incline which is 360 m high at the bottom it strikes a block of mass m
two tugboats pull a disabled supertanker each tug exerts a constant force of 220times106 n one at an angle 120 west of
calculate the change in ph when 800ml of 0100m hclaq is added to 1000ml of a buffer solution that is 0100m in nh3aq and
a car moving with an initial speed v collides with a second stationary car that is one-third as massive after the
determine the molar mass of chloroform gas if a sample weighing 0389 g is collected in a flask with a volume of 102 cm3
a 70kg skateboarder comes over the top of a hill at 60ms and reaches 12ms at the bottom find the total work done on the
you slide a box of books at constant speed up a 30 degree ramp applying a force of 170n directed up the slope the
a mixture of he and ne at a total pressure of 095 atm is found to contain 032 mol of he and 056 mol of ne the partial
in a molecule of dihyroxyacetone phosphate what is the oxidation state of carbon number
a 1 kg mass initially at rest compresses a spring spring constant 2500 nm by 02 m and is released the mass slides along
what is the ph of aqueous solution consisting of 0006m of acetic acid and 0008m of sodium
a gas sample has a volume of 450 l when the temperature is 28 oc and the pressure is 100 atm what will be the new