Which of the above might best describe how soap behaves in a nonpolar solvent like turpentine?
A) a
B) b
C) c
D) d
E) none of the above
Answer: C
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A mass is attached to a vertical spring and bobs up and down between points A and B. Where is the mass located when its kinetic energy is a minimum?
A) midway between A or B B) at either A or B C) one-fourth of the way between A and B
A high-speed dart is shot from ground level with a speed of 150 m/s at an angle 30° above the horizontal. What is the vertical component of its velocity after 4.0 s if air effects can be neglected?
A) 150 m/s B) 36 m/s C) 130 m/s D) 75 m/s E) 38 m/s
Active galaxies are believed to be the product of collisions and interactions because ____
a. they are always seen in contact with another galaxy b. the transfer of matter would explain the black hole eruption c. the collision of individual stars would explain the black hole eruption d. central bulges are formed by collisions e. supermassive black holes are necessary for galactic collisions
At their closest approach, Venus and Earth are 4.20 × 1010 m apart. The mass of Venus is 4.87 × 1024 kg, the mass of Earth is 5.97 × 1024 kg, and G = 6.67 × 10-11 N ? m2/kg2
What is the magnitude of the gravitational force exerted by Venus on Earth at that point? A) 1.10 × 1018 N B) 4.62 × 1028 N C) 5.43 × 1026 N D) 6.30 × 1020 N E) 1.72 × 1019 N