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Two blocks of masses m1=1 kilogram and m2 = 2 kilogram are connected by a mass less cord passing over a mass less, frictionless pulley. The pulley is pulled up with a force f=50 Newton. Find the accelerations of two masses with respect to ground?
Suppose that the sound level of a conversation is initially at an angry 70 dB and then drops to a soothing 50 dB. determine the final sound wave amplitudes
gold which has a density of 19.32 gcm3 is the most ductile metal and can be pressed into a thin leaf or drawn out into
Two space stations are at rest relative to each other and are 6.0 × 107 m apart, as measured by observers on the stations. how long does it take to travel from one station to the other
A child on a sled reaches the bottom of a hill with a velocity of 11.0, what is the magnitude of the average retarding force on the sled on the horizontal straightaway
question a golf ball is hit and leaves the ground at 35 ms. if its speed is 23 ms at the peak of its path what is the
During a particular process, the pressure of the gas in a heat engine increases from 1.15×105 Pa to 2.37×105 Pa, What is the work associated with the process
A vertical scale on a spring balance reads from 0 to 160N . The scale has a length of 11.5cm from the 0 to 160N reading. what is the mass m of the fish
An air conditioner connected to a 120 V rms ac line is equivalent to a 14.9 ? resistance and a 1.39 ? inductive reactance in series. calculate the impedance of the air conditioner
Paper has a dielectric constant of K=3.7. Suppose that a typical sheet of paper has a thickness of .030 mm. Calculate the capacitance of this home-made capacitor
A tank holds a layer of oil, 1.58 m thick, which floats on a layer of syrup that is 0.66 m thick. Both liquids are clear and do not intermix. A ray, The index of refraction of the syrup is closest to:
at a mail sorting facility packages slide down a ramp but are stopped part way down the ramp so that they can be
A 1.5 kg crate falls from a height of 2.0 m onto a spring scale where the spring constant is 1.5 ´ 105 N/m. when you calculate the gravitational potential energy
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