You are alone in space and your tether brakes and you are floating motionless relative to your spaceship, which is located a frustrating 10 meters away. Your spacesuit has no jet pack and you have no air to spare. All you have is your wrench. How can you return to your ship?
Fill in the blank(s) with the appropriate word(s).
Throw the wrench in the opposite direction (utilizing the conservation of momentum). With a 1-lb (2.2 kg) wrench and a 30-mph (13 m/s) throw, you'll be back in a minute.
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Consider the person described in problem N3T.6. The person’s trajectory will look most like which of the following? (The dot shows the person’s position at t = 0 and east is to the right and north to the top.)
A. A
B. B
C. C
D. D
E. E
F. F
Energy in the Electric Field: A parallel-plate air-filled capacitor is made from two plates that are 0.070 m on each side and spaced 9.2 mm apart. What must the potential difference between the plates be to produce an energy density of 0.062 J/m3 in the region between them? (?0 = 8.85 × 10-12 C2/N ? m2)
Fill in the blank(s) with the appropriate word(s).
Which of the following terms describe lenses that are thinner at the center than at the edges? (There could be more than one correct choice.)
A) convex lenses B) diverging lenses C) converging lenses D) concave lenses
Coulomb's Law: Two tiny beads, each of mass 3.2 g, carry equal-magnitude charges. When they are placed 6.4 cm apart and released in outer space, they begin to accelerate toward each other at 538 m/s2. What is the magnitude of the charge on each bead? (k = 1/4??0 = 9.0 × 109 N ? m2/C2)
A. 510 nC B. 44 nC C. 1800 nC D. 890 nC E. 1300 nC