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a nitrogen molecule is initially in a large volume of calm air at stphow many collisions does the nitrogen molecule
what is the thermal kinetic energy in 1 kg of oxygen gas at 20degcwhat fraction of this energy is translationalwhat
a 500-g bullet is shot straight upward with a muzzle speed of 350 ms find the maximum height the bullet can reach by
an object slides down a 30o angle slope from rest at a height of 150 m the coefficient of kinetic friction between the
plane-polarized light passes through two polarizers whose axes are oriented at 350 degrees to each otherif the
a 20 kg 30-cm-diameter disk is spinning at 300 rpm how much friction force must the brake apply to the rim to stop it
a 300 hp car engine can deliver that maximum power at 6000 rpm what is the engines torque at that speed show your
a 250 hp water pump is pumping water from a well 120 m below ground how many liters of water can it lift to the ground
a 1000 kg roller coaster car starts from rest from a hilltop 800 m above the ground and moves without power down and
a 1600-kg car starts from rest to reach 600 milesh in 650 sa how much work is done by the engine during the
an elevator at the cn tower in toronto canada is able to lift 2000 kg including the load and the car to a height of 350
the force exerted to a robot arm from a motor is given as a function of position f 150 200 x2 nhow much work is done
a typical adult human lung contains about 310 million tiny cavities called alveoli estimate the average diameter of a
consider a car which weighs about 2000 kg and is parked at an elevation of 30 m above the bottom of a hill with a
a bicyclist is finishing his repair of a flat tire when a friend rides by with a constant speed of 323 ms three seconds
a disk of mass m is free to rotate about a fixed horizontal axis a string is wrapped around the rimof this disk and a
a spaceship passes you at a speed of 0950c you measure its length to be 502 m how long would it be when at
a doctor preparing to give a patient an injection squirts a small amount of liquid straight upward from a syringe if
four point charges have equal magnitudes three are positive and one is negative as the drawing shows they are fixed in
an intially uncharged 459-uf capacitor and a 663-kohm resistor are connected in series to a 150-v battery that has
you connect five identical resistors in series to a battery whose emf is 120 v and whose internal resistance is
the force of attraction between a -40 micro c and 108 microc charge is 4 n what is the separation between these two
a uniform electric field with a magnitude of 6106 nc is applied to a cube of edge length 01 m if the direction of the
a truck is removed from the mud by attaching a line between the truck and the tree when the angles are 20 degrees at
a molecule of dna deoxyribonucleic acid is 235 microm long the ends of the molecule become singly ionized negative on