To someone moving horizontally at a speed of 0.99c past a vertical meter stick, the stick will appear to be 100 cm long.
a. true
b. false
Ans: a. true
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Why is Titan considered a good candidate for life?
A) It has lakes and rivers of liquid methane and ethane that could support life as water does on Earth. B) Cassini measurements suggest it has an ocean of liquid water beneath its surface. C) There is evidence for several volcanic cones that likely erupt liquid water that is below Titan's frozen crust. D) All of the above
Jane drove her car from Columbus, Ohio to
Cleveland, Ohio. She traveled a total distance of 140 mi in 2.8 hours. Her average speed was a) 50 mi/h b) 0.02 mi/h c) 56 mi/h d) 350 mi/h
How many turns should a 10-cm long ideal solenoid have if it is to generate a 1.5-mT magnetic field when 1.0 A of current runs through it? (?0 = 4? × 10-7 T ? m/A)
A) 120 B) 3200 C) 15 D) 12 E) 1200
A flute behaves like a tube open at both ends. If its length is 67.0 cm, and the speed of sound is 340 m/s, what is its fundamental frequency in Hz?
a. 127 Hz b. 168 Hz c. 670 Hz d. 254 Hz e. 507 Hz