An airplane pilot experiences weightlessness as she passes over the top of a loop-the-loop maneuver. If her speed is 200 m/s at the time, find the radius of the loop.
What will be an ideal response?
4080 m
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Jasper takes two books of mass m1 and m2 off the floor and places them on a shelf at height h. The change in potential energy of the book with mass m1 is four times that of the book with mass m2 . What is the relationship between m1 and m2?
a. m1 = 0.25m2 b. m1 = 0.5m2 c. m1 = 2m2 d. m1 = 4m2
Which of the following stick structures could describe pentane (C5H12)?
A) a B) b C) c D) d E) none of the above
What are the standard candles used to determine that the universe is accelerating?
A: spiral galaxies B: elliptical galaxies C: Type Ia supernovae D: light bulbs E: Type II supernovae formed from the death of massive stars
In Millikan's oil drop experiment, if the electric field between the plates was of just the right magnitude, it would exactly balance the weight of the drop. Suppose a tiny spherical oil droplet of radius 1.3 × 10^?4 cm carries a charge equivalent to one electron. What electric field is required to balance the weight? (The density of oil is 0.85 g/cm3, e = 1.6 × 10^?19 C.)
a. 3.8E+6 N/C b. 6.0E+4 N/C c. 9.4E+2 N/C d. 4.8E+5 N/C e. 1.3E+7 N/C