Substances that are _____ give up hydrogen ions when they dissolve in water
a. basic
b. acidic
c. neutral
d. hydrophobic
e. buffered
b
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A guitar string is fixed at both ends. If you tighten it to increase its tension
A) the frequencies of its vibrational modes will increase but its wavelengths will not be affected. B) the wavelength increases but the frequency is not affected. C) both the frequency and the wavelength increase.
What is the maximum value of the electric field E at 1.5 m from a 102-W light bulb radiating in all directions? (µ0 = 4? × 10^?7 T?m/A, c = 3.00 × 10^8 m/s)
a. 5.2E+1 V/m b. 4.1E+3 V/m c. 2.7E+3 V/m d. 8.5E+2 V/m e. 3.2E+2 V/m
As the rock in this figure falls after being dropped from a great height:
a. its speed increases until it reaches a constant value, but its acceleration decreases gradually to zero. b. its speed continues to increase while its acceleration goes to zero. c. both the speed and the acceleration increase. d. its speed decreases while its acceleration continues to increase. e. its speed slows to zero while its acceleration reaches a terminal value.
What layers of the Earth's structure are not present in the Moon's structure?
What will be an ideal response?