Buoyant force is greatest on a submerged 1-cm3 block of
A) lead.
B) aluminum.
C) same on each
Answer: C
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What are some of the consequences that could happen if the average global temperature increases by 5 Kelvin, as predicted if the carbon dioxides continue to rise at the current rate?
What will be an ideal response?
A floating leaf oscillates up and down twice in 1 s as a water wave of wavelength 10 m passes by. What is the wave's speed?
A) 2 m/s B) 10 m/s C) 20 m/s D) 40 m/s E) more than 40 m/s
Imagine for a minute that the Moon is held in its orbit about the Earth by electrical forces rather than by gravitation. What electrical charges ?Q on the Earth and +Q on the Moon are necessary to hold the Moon in a circular orbit with a period of 27.3 days? The Earth-Moon distance is 384,000 km and the mass of the Moon is 7.35 × 10^22 kg
At the Earth's surface, approximately 1000 W/m2 is present due to solar radiation. If 1390 W are incident upon a 1.0 m x 1.5 m window in a vertical, south-facing wall at this time, what is the angle with respect to the vertical of the sun’s rays?
A. 
B. 
C. 
D. 
E. 
F. 