What are the Aten asteroids?
What will be an ideal response?
Asteroids staying very close to the Sun, with semimajor axes less than 1 A.U. and periods of less than a year. Most of the ones now known do have aphelions slightly outside our orbit.
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Which of the following statements is true of Sagittarius A*?
A) It is a powerful source of radio energy. B) It is the largest constellation in our sky. C) It is the smallest constellation in our sky. D) It has a mass of less than 2 million solar masses.
Deoxyribonucleic acid (DNA) automatically combines raw materials to form important chemical compounds. The building blocks of these molecules are _____
A) sugars B) amino acids C) lipids D) vitamins
A boat has an initial velocity of 2 m/s in the y direction on a stream which is moving in the x direction at 1 m/s. The boat is accelerating in its direction of motion at 1 m/s2. What is the acceleration of the boat (in m/s2) relative to the water?
A.
B.
C.
+ 
D.
? E.
Suppose current is flowing in a wire from right to left. Which way do the electrons in the wire move?
a. right to left b. left to right c. in circles d. It is impossible to tell.