A silver dollar, a quarter, and a penny (these are in order of decreasing diameter) lie at the bottom of a wishing well filled with water. The coin experiencing the largest downward force on its top surface due to the water pressure is the
A. silver dollar.
B. penny.
C. quarter.
D. All of these choices experience the same downward force
Answer: A
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A 20 cm long organ pipe is filled with air and is open at one end and closed at the other. The velocity of sound in air at 0
is 331 m/s. What is the wavelength of the fundamental mode?
A. 40 cm B. 60 cm C. 80 cm D. 43 cm E. 75 cm
Consider the following statement, and explain whether or not it is sensible: NASA hopes to build a new telescope that will allow us to see 100 million light-years into the past
What will be an ideal response?
An iron robot falls from rest at a great height. Neglecting air resistance, what is its speed after it has fallen for 3.5 seconds?
A. 34.3 m/s B. 9.8 m/s C. 13.3 m/s D. 9.8 m/s2
An earthquake emits both S-waves and P-waves which travel at different speeds through the Earth. A P-wave travels at 9 000 m/s and an S-wave travels at 5 000 m/s. If P-waves are received at a seismic station 1.00 minute before an S-wave arrives, how far away is the earthquake center?
a. 88.9 km b. 1 200 km c. 675 km d. 240 km e. 480 km