An egg rests at the bottom of a bowl filled with water. When salt is slowly added to the water the egg rises and floats, from which we conclude
A) salt water is denser than fresh water.
B) salt water is denser than an egg.
C) both of these
D) neither of these
Answer: C
You might also like to view...
A 2.4-kg ball falling vertically hits the floor with a speed of 2.5 m/s and rebounds with a speed of 1.5 m/s. What is the magnitude of the impulse exerted on the ball by the floor?
a. 9.6 N s b. 2.4 N s c. 6.4 N s d. 1.6 N s e. 1.0 N s
What role does entropy play in chemical reactions?
A) The entropy determines how much product will actually be produced. B) The entropy change determines whether the reaction will be exothermic or endothermic. C) The entropy change determines whether the reaction will occur spontaneously or not. D) The entropy change determines whether or not the chemical reaction is favorable.
A ray of light strikes a plane mirror perpendicular to the mirror. What is the angle of reflection?
A) 0° B) 90° C) 180° D) 360° E) 270°
If the diameter of a wire increases, its resistance
a. increases. b. decreases. c. does not change. d. will increase or decrease depending on the composition. e. will change in a way that can not be determined.