If you were standing on Earth's equator, where would you look to see the north celestial pole?
A) on your horizon due north
B) directly overhead
C) toward the ecliptic
D) due east
A) on your horizon due north
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Classify the following as element, compound, or mixture, and justify your classifications: table salt, stainless steel, table sugar, aluminum, ice
A) mixture; element; compound; element; element B) compound; mixture; compound element; compound C) mixture; compound; mixture; element; compound D) compound; element; compound; element; compound
The helium flash increases the star's luminosity
Indicate whether the statement is true or false
Two objects are in all respects identical except for the fact that one was coated with a substance that is an excellent reflector of light while the other was coated with a substance that is a perfect absorber of light
You place both objects at the same distance from a powerful light source so they both receive the same amount of energy U from the light. The linear momentum these objects will receive is such that: A) The reflecting objects receives a larger amount of momentum. B) Both objects receive the same amount of momentum. C) The reflecting object receives a smaller amount of momentum. D) None of the previous answers is correct.
An alpha particle is moving at a speed of 5 × 105 m/s in a direction perpendicular to a uniform magnetic field of strength 4 × 10-2 T
The charge on an alpha particle is 3.2 × 10-19 C and its mass is 6.6 × 10-27 kg. (a) As the alpha particle moves, its velocity is directed (b) The magnitude of the force on the alpha particle is