A circular window 30 cm in diameter in a submarine can withstand a net maximum force of 5.20 × 105 N without damage
What is the maximum depth in a fresh-water lake to which the submarine can go without damaging the window? The density of fresh water is 1000 kg/m3. A) 680 m
B) 740 m
C) 1200 m
D) 750 m
D
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A large coal-fired electric generating plant burns about 1000 kg [one tonne] of coal every 10 seconds. About much of the tonne actually goes into producing electric energy?
A) 990 kg B) 400 kg C) 800 kg D) 100 kg E) 40 kg
A transverse periodic wave is represented by the equation y(x, t) = 2.50 cm cos(2,500 rad/s t - 15.0
x). What is the direction of the vibration of the wave?
A. the z direction B. the y direction C. the x direction
What evidence do we have that volcanism occurs on Io?
What will be an ideal response?
Projectile Motion: Shown below are the velocity and acceleration vectors for an object in several different types of motion. In which case is the object slowing down and turning to its right?
A. 
B. 
C. 
D. 
E. 