An ice cube with large air bubbles in it floats in a brim-full container of water. When the ice cube melts,
A) water spills over.
B) no change in water level occurs.
C) water level in the container goes down.
Answer: B
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What are the most likely sources of the methane gas detected in the Martian atmosphere by the Mars Express orbiter and the Curiosity rover?
A) biological activity only B) biological or geological activity C) comet impacts only D) geological activity only
A charged particle (q = ?8.0 mC), which moves in a region where the only force acting on the particle is an electric force, is released from rest at point A. At point B the kinetic energy of the particle is equal to 4.8 J. What is the electric potential difference VB?VA?
A. ?0.60 kV B. +0.60 kV C. +0.80 kV D. ?0.80 kV E. +0.48 kV
A bird, accelerating from rest at a constant rate, experiences a displacement of 22 m in 10 s. What is the average velocity?
a. 1.2 m/s b. 2.2 m/s c. 2.4 m/s d. 0 m/s e. 0.5 m/s
A mineral that looks glassy is said to have a(n) ______________ luster
Fill in the blank(s) with correct word