A gamma-ray burster emits a quantity of energy similar to that emitted in a ________
Fill in the blank(s) with correct word
supernova or supernova explosion.
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Which of the following best describes the current status of the evidence concerning whether life has ever existed on Mars?
A) Mars probably once had a habitable surface, but we do not know if it had life. B) Clear evidence strongly suggests that life once existed on Mars. C) Clear evidence indicates that Mars never had conditions favorable to life. D) Although current evidence is mixed, ongoing studies should ensure that we will have a definitive answer to the question of whether life ever existed on Mars within about five years.
Why aren't optical or radio telescopes used in particle astronomy, which studies cosmic waves and gravity waves? a. Cosmic and gravity waves are too dangerous to detect
b. Particle astronomy can only be studied in deep space. c. Cosmic and gravity waves are too large of particles for ground-based telescopes. d. Optical and radio telescopes can only detect electromagnetic radiation. e. Optical and radio telescopes are not technologically advanced enough to capture these particles.
Diffraction Gratings: A 17-mm-wide diffraction grating has rulings of 530 lines per millimeter. White light is incident normally on the grating. What is the longest wavelength that forms an intensity maximum in the fifth order?
A. 377 nm B. 352 nm C. 402 nm D. 427 nm E. 452 nm
A horizontal uniform meter stick supported at the 50-cm mark has a mass of 0.50 kg hanging from it at the 20-cm mark and a 0.30-kg mass hanging from it at the 60-cm mark. Determine the position on the meter stick at which one would hang a third mass of 0.60 kg to keep the meter stick balanced
a. 74 cm b. 70 cm c. 65 cm d. 86 cm e. 62 cm