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
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.
For radio transmission, which has the higher frequency?
A) carrier wave B) sound wave C) neither of these