Which action might lead scientists to develop new explanations about the universe?
A. Making a guess about how many stars are in the Milky Way galaxy
B. Wondering whether other planets can support life and whether
that life would be similar to life on Earth
C. Discovering new planets orbiting a star by detecting a wobble in
the star's motion
D. Being familiar with different types of galaxies that exist in the
universe

Awind turbine is initially spinning at a constant angular speed. as the wind's strength gradually increases, the turbine experiences a constant angular acceleration 0.173 rad/s2. after making 2870 revolutions, its angular speed is 132 rad/s. (a) what is the initial angular velocity of the turbine? (b) how much time elapses while the turbine is speeding up?

Asher cycles 12 miles in 16 hours. what is his speed?

Consider the growth of a 20-nm-diameter silicon nanowire onto a silicon wafer. the temperature of the wafer surface is maintained at 2400 k. assume the thermal conductivity of the silicon nanowire is 20 wm-1k-1 and all its surfaces including the tip are subjected to convection heat transfer with the coefficient h = 1×105 wm-2k-1 and t∞ = 8000 k. when the nanowire grows to l = 300 nm, what is the temperature of the nanowire tip (t (x =