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A simple of helium gas occupies 5 liters at 22degree C and a gauge pressure of 200,000 pascals. What is the mass of the gas? (The gas constant for helium is 2.08 x 10third power J/kg-K.)
A single loop of copper wire moves at an unknown constant speed v into a region of uniform magnetic field B = 5.00 T. Calculate the induced current in the copper wire loop
As a tennis ball is struck, it departs from the racket horizontally with a speed of 27.3 m/s. The ball hits the court at a horizontal distance of 19.3 m from the racket. How far above the court is the tennis ball when it leaves the racket?
how come the formula: (change)v / (change)t = (change)x cannot be used for this exercise When a 58-g tennis ball is served, What is the magnitude of the net force acting on the ball
A tuning fork with a frequency of 440 Hz is held just above the top of a uniform glass tube containing water. What is the speed of sound in air
Under an outdoor area "yellow" [Na lamp] light, a fiber is placed between but at the edge of two 3 cm glass slides. How thick is the fiber
The nucleus of 8Be, which consists of 4 protons and 4 neutrons, is very unstable and spontaneously breaks into two alpha particles, What is the force between the two alpha particles
A frictionless pulley has the shape of a uniform solid disk of mass 2.1 and radius 10. A 1.10 stone is attached to a very light wire that is wrapped around rim of pulley and the system is released from rest.
find static friction between the chair and the floor.
The 2.0 kg, 20 cm diameter disk is spinning at 320 rpm. How much friction force must the brake apply to the rim to bring the disk to a halt in 2.0 s.
When a stone of weight W is suspended from a scale and submerged in water the scale reads 10 kg. what is the true weight W (in kg) of the stone
A 10.1-kg cannonball is fired from a 3,350 kg cannon with a velocity of 198 m/s. What is the speed of recoil of the cannon
A loudspeaker of mass 18.0 {rm kg} is suspended the distance of h = 1.20 {rm m} below the ceiling by two cables that make equal angles with the ceiling. Each cable has a length of l = 2.70 {rm m}. What is the tension T in each of the cables? Utili..
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