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The density of water is about 1000 kg/m3 and the density of air is about 1 kg/m3. Using only your own everyday knowledge quantified (and your personal measuring sticks), estimate the mass of blood that is pushed out of the heart in each heartbeat and the mass of air that is pushed out of your lungs with each breath. Be sure to carefully explain your reasoning and justify your estimations so that a reader can determine that it is plausible that you know the numbers you have come up with and that they can be trusted.
A massive starship with rest mass of 8x10^11 kg has a relavistic momentum of magnitude 5x10^20 kg m/s
A horizontal force of 750 N is needed to overcome the force of static friction between a level floor and a 250 kg crate. What is the acceleration of the crate if the 750 N forces is maintained after the crate begins to move and coefficient of kine..
On the planet Zardem, the standard unit of time is the Zarsec, or Zs, where 1 Zs = 2.2s. how fast is the runner traveling
At this time it has reached a height of 420 metres above launch pad and attained an upward velocity of 50 ms-1. From this time on, the rocket has constant upward acceleration -10 ms-2 (due to the effect of gravity alone).
An ac generator supplies a peak (not rms) voltage of 120.0 V at 60.0 Hz. What is the average power dissipated in the circuit
A bolt is dropped from a bridge under construction, falling 92m to the valley below the bridge. (a) How much time does it take to pass through the last 26 percent of its fall? What is its speed (b) when it begins that last 26 percent of its fall a..
A solenoid is wound with a single layer of insulated copper wire (of diameter 2.6 mm), What is the inductance per meter for the solenoid near its center
how fast the air flow over the upper surface of the wing. What is the coefficient of kinetic friction between the box and the floor.
A certain gyroscope consists of a uniform disk with a 48 cm radius mounted at the center of an axle that is 12 cm long, what is the precession rate
The pulley is frictionless and of negligible mass. The coefficient of kinetic friction between mass 1 and teh ramp is 0.25. Evaluate the change in kinetic energy of the 50 kg block as it moves from a to b, a distance of 20 m
A 4.80-m clothesline is hung between two poles that are 4.76 m apart
A ranger in a national park is driving at 44 km/h when a deer jumps onto the road 70 m ahead of the vehicle. After a reaction time of t s, the ranger applies the brakes to produce an acceleration of -3.00 m/s2.
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