Increasing the air temperature inside an organ pipe, neglecting any expansion of the pipe, will ________ the frequency of the fundamental tone.
Fill in the blank(s) with the appropriate word(s).
increase
raise
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How many times does the Moon cross the ecliptic each month?
a. none b. once c. twice d. three times e. four times
A 5.0-kg object is pulled along a horizontal surface at a constant speed by a 15-N force acting 20° above the horizontal. How much work is done by this force as the object moves 6.0 m?
A. 78 J B. 82 J C. 85 J D. 74 J E. 43 J
If a satellite moves with constant speed in a perfectly circular orbit around the earth, what is the direction of the acceleration of the satellite?
A) in the forward direction B) in the backward direction C) outward away from the earth D) inward toward the earth E) The acceleration is zero because the speed is constant.
Account for the observation that ethyl alcohol, ImageImageOH, dissolves readily in water but dimethyl ether, CImageOCImage, which has the same number and kinds of atoms, does not
A) The hydrogens on the dimethyl ether surround the molecule, shielding the inner atoms from interacting with the water. B) Because the carbons arrange themselves in a straight line, the ethanol can interact more easily with more water molecules, thus increasing its solubility. C) The high electronegativity of the carbon-oxygen-carbon bond on dimethyl ether creates a strong dipole charge on the ends of the molecule, making it highly soluble in water. D) Because dimethyl ether lacks an -OH group, it is significantly less polar than is ethyl alcohol and is not readily soluble in water.