A red supergiant is observed in a globular cluster in another galaxy (located 150,000 light years away). It is predicted, based on its mass and age of the star that it will supernova in about 10,000 years
When will this supernova be visible on Earth? A) 10,000 years from now
B) 10,000 years ago
C) 150,000 years from now
D) 150,000 years ago
E) 160,000 years from now
A
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People can snorkel down to a depth of roughly one meter. This means that the additional pressure on the air in their lungs is roughly
A. 9800 N. B. 9800 Pa. C. 9800 ATM. D. 19,600 N. E. 19,600 N/m2.
Resolution: A camera lens having a 50-mm focal length is set to f/4.0. What is the minimum spacing of two objects located 12 m from the lens if the objects are just barely resolved in the image using light of wavelength 500 nm?
A. 1.66 mm B. 4.72 mm C. 0.024 mm D. 4.9 × 10-5 m E. 0.59 mm
A 0.28-kg stone you throw rises 34.3 m in the air. The impulse your hand receives from the stone while it throws the stone is
a. 2.7 N s, up. b. 2.7 N s, down. c. 7.3 N s, up. d. 7.3 N s, down. e. 9.6 N s, up.
A square loop of wire carrying a current in a clockwise direction lies in the plane of the paper. The magnetic field inside the loop is directed
A) out of the paper everywhere. B) out of the paper near the wire, but into the paper elsewhere. C) into the paper everywhere. D) into the paper near the wire but out of the paper elsewhere. E) not given