_______________ is the most reflective object in the Solar System
Fill in the blank(s) with correct word
Enceladus
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An astronomical unit (AU) is equal to the average distance from the Earth to the sun, about 92.9 × 106 mi. A parsec (pc) is the distance at which 1 AU would subtend an angle of 1 second of arc. How many miles are there in a parsec?
What will be an ideal response?
Objects the size of the one that exploded over Chelyabinsk (Russia), causing significant damage and injuries to more than 1,000 people, probably hit Earth at least
A) once a century. B) once a year. C) once every 500,000 years. D) once every 100 million years.
A slab of material 1 rests on the surface of a slab of material 2 . A light ray in material 1 has an angle of incidence of 30° on the interface between the materials, while the ray in material 2 has an angle of refraction of 45°. What is the critical angle of incidence for total internal reflection for a ray of light going from material 2 to material 1?
a. 30° b. 45° c. In this case there is no critical angle. d. At least one of the indices of refraction or its equivalent is needed to solve this problem.
A helium-filled weather balloon has a 0.90-m radius at liftoff where air pressure is 1.0 atm and the temperature is 298 K. When airborne, the temperature is 210 K, and its radius expands to 3.5 m. What is the pressure at the airborne location?
a. 0.50 atm c. 0.019 atm b. 0.012 atm d. 0.38 atm