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n 464 mol of hydrogen gas is initially at t 343 k temperature and pi 201times105 pa pressure the gas is then
the electric motor of a model train accelerates the train from rest to 0820 ms in 185 ms the total mass of the train is
a 650 kg elevator starts from rest it moves upward for 450 s with constant acceleration until it reaches its cruising
the ultracentrifuge is an important tool for separating and analyzing proteins in biological research because of the
a 192-kg satellite is in circular orbit around the earth and moving at a speed of 455 kms how much work must be done
the radius of a black hole is the distance from the black holes center at which the escape speed is the speed of lighta
n 310 mol of hydrogen gas is initially at t 388 k temperature and pi 176times105 pa pressure the gas is then
you are asked to design a spring that will give a 1000 kg satellite a speed of 320 ms relative to an orbiting space
you are designing the section of a roller coaster ride shown in the figure previous sections of the ride give the train
a hardworking ant must supply 00500 n to pull a small piece of fruit at constant velocity over a distance of 800 cm up
a woman lies on a weightless board across two scales her feet are directly over the right scale how far above her feet
a weightlifter bench-presses a 1300 kg barbell from his chest to a height equal the length of his arms 0850 m how much
a harvest mouse can detect sounds as quiet as -10 suppose you are sitting in a field on a very quiet day while a
a block with mass m attached to a horizontal spring with force constant k is moving with simple harmonic motion having
a block is pushed up a 20 degree friction-less incline with an initial speed 120 msa how high up the plane does the
a light-dimmer circuit the intensity of a lightbulb with a resistance of 140 ohms is controlled by connecting it in
the point of the needle of a sewing machine moves in shm along the x-axis with a frequency of 25 hz at t0 its position
a 220-kg object attached to a spring moves without friction b 0 and is driven by an external force given by the
two charged particles q1 250times103 c and q2 3850e-3 c are separated by a distance of 500 cma what is the electric
a an l-r-c circuit operating at 60 hz has an inductor with an inductance of 153x10-3 h a capacitance of 167x10-2 f and
a spring with k 400 nm is at the base of a frictionless 300deg inclined plane a 050-kg object is pressed against the
a 19-kg chandelier is suspended from the ceiling by four vertical steel wires each wire has an unloaded length of 4 m
a 31 kg block slides down a frictionless ramp as shown in the figure the top of the ramp is 16 m above the ground the
a car with mass of 10000 kg accelerates from 0 ms to 400 ms in 110 s ignore air resistance the engine has a 22
a 746-kg bungee jumper jumps from a bridge she is tied to a bungee cord whose unstretched length is 118 m and falls a