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A cubic meter of atomic hydrogen at 27 degree celsius and at atmospheric contains pressure contains 2.7*10^24 atoms. Find the number of these atoms in their first excited state of 27 degree celsius?
A uniform magnetic field of 1.5 T points due north. A proton is moving die west in this field at the speed of 2.0 x 107 m/s. Obtain the magnitude and direction of the magnetic force on the proton
A neuron is stimulated with an electric pulse. The action potential is detected at a point 3.20cm down the axon 0.0053s later, What is the speed of the electric pulse along the axon
Calculate what is the speed of a particle whose kinetic energy is equivalent to one-half its own rest energy
An aircraft flying at 100 mph TAS at 5000 ft pressure altitude on a standard day experiences a clogged static port. What is the average velocity around the cockpit
A 54 N crate is suspended from the left end of a plank. The plank weighs 21N, but it is not uniform, so its center of gravity does not lie halfway between the two ends. The system is balanced by a support that is 0.3m from the left end of the plan..
A sky diver of mass 81.0 kg jumps from a slow-moving aircraft and reaches a terminal speed of 51.5 m/s. What is the acceleration of the sky diver when her speed is 30.0 m/s
A certain force gives an object of mass m1 an acceleration of 12.0 m/s2 and an object of mass wt2 ?rr acceleration of 3.30 m/s2. What acceleration would the force give to an object of mass?
A roller coaster has 8 cars, each of mass of 95.0 kg. The ride begins 47.5 m above the ground. What is the speed of the train
a bicyclist is traveling at a speed of 20m/s as he approaches the bottom of a hill. He decides to coast up the hill and stops upon reaching the top. determine the vertical height of the hill
Find the work done on the object by the force from t = 0 to t = 2.7 s.
if the radius of curvature of the concave mirror is 15 cm, what is the position,nature and magnification of the image
A loudspeaker of mass 23-{rm kg} is suspended a distance of h = 1.80- {rm m} below the ceiling by two cables that make equal angles with the ceiling. Each cable has a length of l = 3.10- {rm m}. What is the tension T in each of cables.
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