The estimated lifetime of a resource is longer for exponential than static growth
What will be an ideal response?
Not so. The exponential lifetime takes account of the growth in use with time,
whereas the static lifetime does not. Therefore, the lifetime is shorter for exponential growth
(see Table 10.3).
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The acceleration of a ball as it rolls down a ramp is 4 m/s2 . The ball is referred to 2 s after it starts to roll. The velocity acquired after starting from rest in m/s is
a. 0. b. 2. c. 4. d. 8. e. 16.
A thin uniform rod (length = 1.2 m, mass = 2.0 kg) is pivoted about a horizontal, frictionless pin through one end of the rod. (The moment of inertia of the rod about this axis is ML2/3.) The rod is released when it makes an angle of 37° with the horizontal. What is the angular acceleration of the rod at the instant it is released?
a. 9.8 rad/s2 b. 7.4 rad/s2 c. 8.4 rad/s2 d. 5.9 rad/s2 e. 6.5 rad/s2
In which of the following types of galaxies would you expect to find active star formation?
a. elliptical galaxies only b. elliptical and spiral galaxies c. spiral galaxies only d. elliptical and irregular galaxies e. spiral and irregular galaxies
What is the solar wind?
A) a stream of charged particles flowing outward from the surface of the Sun B) the uppermost layer of the Sun, which lies just above the corona C) the strong wind that blows sunspots around on the surface of the Sun D) the wind that causes huge arcs of gas to rise above the Sun's surface