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A block is dropped onto a spring with k = 31 N/m. The block has a speed of 3.5 meter per second just before it strikes the spring. If the spring compresses an amount 0.14 meter before bringing the block to rest, evaluate what is the mass of the block?
two insulated charge cu spheres a and b of identical size have charge qa and -3qa when they are brought in contact with
A 69.0 kilogram base runner begins his slide into second base when he is moving at a speed of 3.9 m/s. Evaluate how far does he slide
suppose 4.00 g of hydrogen is separated into electrons and protons. suppose also the protons are placed at the earths
A 1.4kg block and a 2.7kg block are attached to opposite ends of a light rope. what is the acceleration of the lighter block
A block of mass 2.50 kilogram is pushed 2.80 meter along a frictionless horizontal table by a constant 14.0 Newton force directed 25.0 degree below the horizontal. Find the work done by the normal force exerted by the table
A particular heat engine has a useful power output of 4.40 kW and an efficiency of 30.0%. The engine expels 7200 J of exhaust energy in each cycle , Find the time interval for each cycle
An electron starts from rest 2.88 cm from the center of a uniformly charged sphere of radius 1.99 cm. how fast will the electron be moving when it reaches the surface of the sphere
In a certain organic molecule, the nuclei of two carbon atoms areseparated by a distance of 0.35 \rm nm. What is the magnitude of the electric force between them ?
The average distance from the earth to the sun is called the astronomical unit (AU). does it obey Kepler's third law
an observer that is standing 12m from a stereo sound speaker perceives the sound level from the speaker to be 60
A spaceship approaching Earth at 0.70 c fires a particle beam toward Earth, with speed 0.76 c relative to the ship
A resistor with R = 36.0 ohms and a capacitor with C = 1.20 x 10^-6 F are connected in series to a battery that has negligible internal resistance, What is the final charge on the capacitor, a long time after the circuit is completed
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