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Neil A. Armstrong was the first person to walk on the moon. The distance between the earth and the moon is 3.85 108 m. Find the time it took for his voice to reach the earth via radio waves. s (b) Someday a person will walk on Mars, which is 5.6 1010 m from the earth at the point of closest approach. Determine the minimum time that will be required for a message from Mars to reach the earth via radio waves.
A volume of 1.8 L of neon gas (monatomic) is at a pressure of 3.4 atmospheres and a temperature of 370 K. The atomic mass of neon is 20.2 g / mol. Calculate the mass of neon gas in SI units.
steam with 88.6% quality and a flow rate of 750 kg/s enters a condenser operating @ 75 KPa. Saturated liquid leaves the condenser. How much heat is rejected to the cooling system.
Find the final state inside the tank, A tank contains 2kg of nitrogen at 10K with a quality of 50%.Through a volume flow meter and valve, 0.5kg is now removed while the temperature remains constant.
the potential at location a is 377 v. a positively charged particle is released there from rest and arrives at
a 60-kg woman holds a 9-kg package as she stands within an elevator which briefly accelerates upward at a rate of g4.
the light right-angle boom which supports the 400-kg cylinder is supported by three cables and a ball-and-socket joint
Neglecting the mass of the rod and the effect of friction, determine the radial and transverse components of the velocity of the collar when r = 0.5 m.
a student plays two notes on the piano keyboard simultaneously. the white key has a frequency of 352 hz and the black
an automobile tire with a volume of 0.5m3 is inflated to a gage pressure of 200 kpa. calculate the mass of air in the
hot water is pumped through a plate heat exchanger. the hot water side of the heat exchanger consists of 16 plates of
What tightening torque should be used if the connection is permanent and the fasteners are lubricated? What portion of the external load is taken by the bolts? By the members?
the critical resolved shear stress of a bcc metal is 7 mpa. a single crystal of this alloy is the 0 0 1 direction.
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