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A spherical balloon has a radius of 6.75m and is filled with helium. The density of helium is 0.179 kg/m3, and the density of air is 1.29 kg/m3. The skin and structure of the balloon has a mass of 960kg . Neglect the buoyant force on the cargo volume itself. Determine the largest mass of cargo the balloon can lift.
A man strides across a bed of embers. Assume the glowing charcoal is covered with a thin layer of ash 0.50 mm thick and is at a temperature of 650C. The thermal conductiviity of ash and charcoal is 1.5 W/ (mxK). (a) Estimate the heat transferred t..
If you place the box on a dolly of mass 4.7 and with coefficient of rolling friction 2.0×10−2, illustrate what horizontal acceleration would that 154 force provide?
explain the magnitude of the centripetal acceleration. At what two locations on the x-axis (xpositive, xnegative) is the potential zero.
An implanted pacemaker supplies the heart with 72 pulses per minute, each pulse providing 3.0 V for 0.95 ms, Find the current that flows during a pulse
a man is standing near a gate and a flag pole. The gate is 15 ft from the pole. If the pole is h=35 ft tall, how far is the man from the gate
A 200 kg communications satellite is placed into a circularorbit around the Earth with a radius of 4.23 x 107m(26,000 miles). Find the gravitational force on the satellite
A monatomic ideal gas expands slowly to twice its original volume doing 310 J of work in the process, Find the change in internal energy if process isobaric
A 117 kg fullback runs at the line of scrimmage. How fast was he running initially
A certain type of molecule has an excited energy states, plus the minimum energy ground state. what is the energy of the ground state
q1. the student now starts moving a box up a 10.0deg incline keeping her 142 n forces directed at 27.0deg above the
a ball is tossed directly upward at an initial speed of 5.7m/s and is caught when it falls back down to the throwers hand, how much total time is the ball airborne
A glass window pane has an area of 3.0m^2 and a thickness of .60 cm. how much heat flows through the window per hour
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