An F-type star would have a larger habitable zone that does our Sun
Indicate whether the statement is true or false
TRUE
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Physical Pendulum: A Christmas ornament made from a thin hollow glass sphere hangs from a small hook at its surface. It is observed to oscillate with a frequency of 2.50 Hz in a city where g = 9.80 m/s2. What is the radius of the ornament? The moment of inertia of a hollow sphere of mass M and radius R about a point on its edge is 5MR2/3.
A. 1.84 cm B. 3.68 cm C. 2.38 cm D. 3.98 cm E. 4.69 cm
If you set the cruise control of your car to a certain speed and take a turn, the speed of the car will remain the same. Is the car accelerating?
A) Yes B) No
Two very thin lenses, each with focal length 20. cm, are placed in contact. What is the focal length of this compound lens?
A) 15. cm B) 10. cm C) 30. cm D) 40. cm E) 20. cm
Which of the following best describes the situation according to Jackie?
A) She stays still, while Earth rushes away from her at 0.9999c and Vega rushes toward her at 0.9999c. Since Vega is 25 light-years away, she says it takes Vega about 25 years to reach her. B) She stays still, while Earth rushes away from her at 0.9999c and Vega rushes toward her at 0.9999c. She sees the distance from Earth to Vega shortened considerably from 25 light-years, and therefore it takes far less than 25 years for Vega to reach her. C) She says that the 25-light-year trip takes only a few months and therefore concludes that she is traveling faster than the speed of light. D) She's taking a trip that takes 25 years from Earth to Vega.