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two ships are 335 m aparts from each other are shooting cannons at each other both ships cannons are 30 m above the
you spray your sister with water from a garden hose the water is supplied to the hose at a rate of 0147 liters per
bowling balls can be made from a variety of substances and are required to have a circumference of roughly 278 inches
determine the density and atomic radius of tungsten w if it crystallizes in a face centered cubic arrangement with cell
a 9 kg mass slides to the right on a surface having a coefficient of friction 037 as shown in the figure the mass has a
a railroad car fo mass m2000kg and speed v0 850ms collides and couples to another car of equal mass and initially at
calculate the ph of a buffer containing 0030 m hc2h3o2 and 0050 m nac2h3o2 the ka of hc2h3o2 is 175 x
in the reaction 2a x y the initial concentrations are all 0600 m if the equilibrium constant is 120 x 106 what are
calculate the activation energy of a reaction whose rate constant is 422 x 104 ssup1 at 25degc and 454 x 104ssup1 at
a wheel rotates with a constant angular acceleration of 310 rads2 assume the angular speed of the wheel is 155 rads at
a certain reaction has a h of -213 kjmol and a s of -270 jmolk at 625degc determine the free energy change in the
determine the molality of a solution that is 725 m nano3aq and has a density of 137
in one of the neutron-induced fission reactions of u-235atomic mass 235043922 the products are ba -140 and kr-93 a
you observe that a solid cube of some material floats on the surface of an oil puddle at a service station with 763 of
a gas occupies 678 ml at 0935 atm and 70 f what will its volume be at 1078 atm and 70
a car approaches the top of a hill that is shaped like a vertical circle with radias r550m what is the fastest speed a
a swimmer who is able to swim a speed of 14ms in still water starts to swim southward directly across a 28km wide river
a rocket-powered hockey puck has a thrust of 150n and a total mass of 140kg it is released from rest on a frictionless
a 180 kg rubber ball is dropped from a height of 350 m and bounces off the floor if the ball does not lose any energy
how much work is done by pressure in forcing 66 m3 of water through a 130 mm internal diameter pipe if the difference
an air conditioner connected to a 150 v rms ac line is equivalent to a 98 resistance and a 197 inductive reactance in
the string in a yo-yo is wound around an axle of radius 0547 cm the yo-yo has both rotational and translational motion
an airtight box having a lid with an area of 139 in2 8968 cm2 is partially evacuated if a force of 1050 lb 46706 n
a river 240 m wide and 50 m deep drains a 30000 km2 land area in which the average precipitation is 48 cmyear
in a rotor-ride at a carnival people rotate in a vertical cylindrically walled room pt a if the room radius was 52 and