A wave whose wavelength is 0.500 m is traveling down a 500-m long wire whose total mass is 25 kg and is under a tension of 2000 N. (a) What is the speed of the wave on the wire? (b) Find the frequency of this wave
What will be an ideal response?
(a) 200 m/s (b) 400 Hz
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About how many extrasolar planets have been discovered (as of 2008)?
A) tens B) hundreds C) thousands D) tens of thousands
What is the gauge pressure at a depth of 100 m. in water?
What will be an ideal response?
Which of these age ranges best describes the lunar maria?
A) 2.5 - 1.0 billion years B) 100 - 65 million years C) 8.6 - 6.0 billion years D) 3.9 - 3.2 billion years E) a few million years to present lava flows seen erupting
A possible means of spaceflight is to place a perfectly reflecting aluminized sheet into Earth orbit and use the light from the Sun to push this solar sail. If a huge sail of area 6.00 × 10^5 m2 and mass 6000 kg were placed into orbit and turned toward the Sun, what would be the force exerted on the sail? (Assume a solar intensity of 1380 W/m2.)