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
C. 80 cm
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Nuclear Reactions: A proton strikes an oxygen-18 nucleus, producing fluorine-18 and another particle X. What is the other particle X?
A. neutron B. positron C. alpha particle D. electron E. gamma ray
What types of stars end their lives with supernovae?
A) all stars that are yellow in color B) stars that are at least several times the mass of the Sun C) all stars that are red in color D) stars that are similar in mass to the Sun E) stars that have reached an age of 10 billion years
A race car traveling at 100 m/s enters an unbanked turn of 400 m radius. The coefficient of (static) friction between the tires and the track is 1.1 . The track has both an inner and an outer wall. Which statement is correct?
a. The race car will crash into the outer wall. b. The race car will crash into the inner wall. c. The car will stay in the center of the track. d. The car will stay in the center of the track if the driver speeds up. e. The car would stay in the center of the track if the radius were reduced to 200 m.
A hot pizza contains __________
Fill in the blank(s) with correct word