Complete the equation:
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During its early history, matter dominated the universe
Indicate whether the statement is true or false
Thanks to interferometry, a properly spaced set of 10-meter radio telescopes can achieve the angular resolution of a single, 100-kilometer radio telescope.
a. Yes, but with much lower sensitivity than a single, 100- kilometer telescope. b. Yes, and the resulting interferometer will have exactly the same properties as a single, 100-kilometer telescope. c. No, interferometry only works over much smaller distances. d. No, the blurring effects of Earth’s atmosphere limit the achievable angular resolution.
Jane plans to fly from Binghampton, New York, to Springfield, Massachusetts, about 280 km due east of Binghampton. She heads due east at 280 km/h for one hour but finds herself at Keene, which is 294 km from Binghampton in a direction 17.8 degrees north of due east. What was the wind velocity?
a. 14 km/h, E b. 14 km/h, W c. 14 km/h, N d. 90 km/h, S e. 90 km/h, N
The radiation from cell phones
A. does not cause cancer B. causes cancer, but not enough to worry C. causes over 1 % of the cancer in those who use them D. protects users from cosmic rays