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At the time of this book's printing, the U.S. national debt is about $10 trillion. Note: Before doing these calculations, try to guess at the answers. You may be very surprised.
(a) If payments were made at the rate of $2 000 per second, how many years would it take to pay off the debt, assuming no interest were charged?
(b) A dollar bill is about 15.5 cm long. How many dollar bills attached end to end would it take to reach the Moon? The Earth-Moon distance is 3.48*10^8 m.
Sit on a rotating chair. Slowly twist your body in one direction and after that rapidly twist it in the other. What is going to happen? Is angular momentum conserved and if not why.
Two geekie physics students with a combined mass of 133 kg jump into their old car to run out for some late night pizza. What is mass of the car
A sprinter crosses the finish line of a race. The roar of the crowd in front approaches her at a speed of 351 m/s. What is the sprinter's speed
The locomotive is moving at 25 km/h. The engineer of the high speed train immediately applies the brakes. What must be the magnitude of the resulting constant deceleration if a collision is to be just avoided.
A mass of 0.25 kg is attached to a horizontal spring with a spring constant of 4.0 N/m. Write an expression for the position of the mass as a function of time
A 55.6-kg ice skater is moving at 4.00 m/s when she grabs the loose end of a rope, Determine the force exerted by the horizontal rope on her arms
A block, mass m, slides down a ramp inclined 27 degrees above the horizontal. Calculate the speed of the block if it begins at rest
Time standards are now based on atomic clocks. A promising second standard is based on pulsars, which are rotating neutron stars (highly compact stars consisting only of neutrons).
When she stands 3.5m from you, what is the height of her image formed on the retina of your eye, What is the height of her image when she is 4.5 m from you
A 0.29 F capacitor is desired. What area must the plates have if they are to be separated by a 3.7 mm air gap
A stone is dropped from a high building which is 3630 cm. when the stone has fallen 20m, what the magnitude of the impulse the Earth received
High speed stroboscopic photographs show that the head of a 181 g golf club is traveling at 55.4 m/s, Find the speed of the golf ball just after impact
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