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A 75 kilogram person stands on a 6.0 meter long and 47 kilogram ladder. The ladder is tilted 60 degree above the horizontal. The coefficient of friction between the floor and the ladder is 0.42. The coefficient of friction between the wall and the ladder is zero. Find what distance d along the ladder can the person pass without the ladder slipping?
The partial pressure of oxygen in air is about 0.20 atm. (Air is 20% oxygen by volume.) In deep-sea diving, the composition of air the diver breathes must be changed to maintain this partial pressure. What must the oxygen content (in precent by volum..
You throw a ball toward a wall at speed 20 m/s and at angle theta=60 degrees above the horizontal. What is the angle when it hits the wall
The force exerted by the wind on the sails of a sailboat is Fsail = 480 N north. The water exerts a force of Fkeel = 190 N east. If the boat (including its crew) has a mass of 300 kg, what are the magnitude and direction of its acceleration?
A pipe is horizontal and carries oil that has a viscosity of 0.15 Pa · s. The volume flow rate of the oil is 4.6 10-5 m3/s. What is the absolute pressure at the input end
Some forms of cancer can be treated using proton therapy in which proton beams are accelerated to high energies, then directed tocollide into a tumor, killing the malignant cells. Suppose a protonaccelerator is 7.3 m long andmust accelerate proton..
a uniform sphere of mass 2kg is kept in a fixed position by two strings ab and cd. ab is horizontal and cd is inclined
you are moving into an apartment and take the elevator to the 6th floor. suppose your weight is 663 n and that of your
In the 1930’s acoustic detection systems able to detect anaircraft at a range of 40.0 km were developed in several countries.The aircraft engines generate a sound intensity level of 95.0 dB ata distance of 10.0 metres from the aircraft, what inten..
At standard pressure, what would the temperature of water molecules be if they had a root mean square (rms) of velocity of 5.87 m/s
You are climbing in the High Sierra where you suddenly find yourself at the edge of a fog-shrouded cliff, how high is the cliff if the speed of sound is 330 m/s
What is acceleration of an object sliding down to plane
A dipole consists of charges +eand -eseparated by0.76nm. It is in an electric fieldE=2.4× 104N/C. What is the torque on the dipole when it is perpendicular to the field
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