Based on their optical design, would an airline rather you bring your 8" Newtonian or Cassegrain to the next eclipse? Why?
What will be an ideal response?
Considering the restrictions on size and weight now, you would find your Cassegrain, with its folded optical design and compact size, more welcome.
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A swimmer swims 20 laps in a north-south facing pool in 7.00 minutes. Her first lap is toward the north. Her displacement and average velocity are
a. 0; 0. b. 0; 2.38 m/s, south. c. 0; 2.38 m/s, north. d. 1 000 m, south; 2.38 m/s, south. e. 1 000 m, north; 2.38 m/s, north.
When you look into a pool of water, the depth looks less than it actually is because of __________
Fill in the blank(s) with correct word
A bucket of water with total mass 24.0 kg is attached to a rope, which in turn, is wound around a 0.050-m radius cylinder at the top of a well. A crank with a turning radius of 0.35 m is attached to the end of the cylinder. What minimum force directed perpendicular to the crank handle is required to just raise the bucket? (Assume the rope's mass is negligible, that the cylinder turns on
frictionless bearings, and that g = 9.8 m/s2.) a. 1 600 N b. 3.4 N c. 34 N d. 670 N e. 4.1 N
Structure 1 with member BC of length L/2 has force P1 applied at joint C. Structure 2 with member BC of length L has force P2 applied at C. Both structures have constant flexural rigidity EI. The required ratio of the applied forces P1/P2 so that joint B reactions RB1 and RB2 are equal is approximately:
(A) 1
(B) 5/4
(C) 3/2
(D) 2
