A horizontal force of 85.0 N is applied to move a 46.0-kg cart across a 4.0-m level surface. What work is done by the 85.0-N force?
a. 7.4E+0 J
b. 1.6E+4 J
c. 3.4E+2 J
d. 9.8E+2 J
e. 4.6E–1 J
c
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A 2.15 kg lightly damped harmonic oscillator has an angular oscillation frequency of 0.261 rad/s. If the maximum displacement of occurs when t = 0.00 s, and the damping constant b is 0.74 kg/s what is the object's displacement when t = 4.01 s?
A) 0.50 m B) 0.43 m C) 0.58 m D) 0.65 m
For radio transmission, which has the higher frequency?
A) carrier wave B) sound wave C) neither of these
A certain crying baby emits sound with an intensity of 8.0 × 10-8 W/m2
What is the intensity level due to a set of five such crying babies, all crying with the same intensity? You can neglect any absorption, reflection, or interference of the sound. The lowest detectable intensity is 1.0 × 10-12 W/m2. A) 79 dB B) 69 dB C) 56 dB D) 49 dB E) 36 dB
Methyl salicylate is an ester commonly called
a. glycerine. b. oil of wintergreen. c. heroin. d. chloroform. e. methamphetamine.