The Allen Telescope Array is one of the many radio searches for extraterrestrial life
Indicate whether the statement is true or false
TRUE
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Which of the following best describes what would happen if a 1.5-solar-mass neutron star, with a diameter of a few kilometers, were suddenly (for unexplained reasons) to appear in your home town?
A) The entire Earth would end up as a thin layer, about 1 cm thick, over the surface of the neutron star. B) It would rapidly sink to the center of Earth. C) The combined mass of Earth and the neutron star would cause the neutron star to collapse into a black hole. D) It would crash into Earth, throwing vast amounts of dust into the atmosphere that, in turn, would cool Earth; this is probably what caused the extinction of the dinosaurs.
When a car goes around a curve at twice the speed, the centripetal force on the car doubles
a. True b. False Indicate whether the statement is true or false
Four 1.5-volt AA batteries in series power a transistor radio. If the batteries hold a total charge of 200 C, how long will they last if the radio has a resistance of 200 ??
a. 6.0 h b. 1.9 h c. 2.6 h d. 1.4 h e. 2.4 h
The Balmer series of emission lines from hydrogen lie in the ________ part of the EM spectrum
a. near infrared b. infrared c. visible d. ultraviolet