For the multiplication of 7.443 m times 8.5 m, the result should be reported with how many significant figures?
a. Two
b. One
c. Three
d. Four
e. Seven
a
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A 0.20-kg block rests on a frictionless, level surface and is attached to a horizontally aligned spring with a spring constant of 80 N/m. The block is initially displaced 4.0 cm from the equilibrium point and then released to set up a simple harmonic motion. A frictional force of 0.3 N exists between the block and surface. What is the speed of the block when it passes through the equilibrium
point after being released from the 4.0-cm displacement point? a. 0.45 m/s c. 0.72 m/s b. 0.63 m/s d. 1.2 m/s
An object that has zero resistance is a semiconductor
Indicate whether the statement is true or false
Intensity of Sound: A certain glass window reduces the intensity level of the sound from 72 dB to 47 dB. By what factor is the acoustic power reduced by this glass window?
A. 3.2 × 10-3 B. 2.2 × 10-2 C. 5.6 × 10-2 D. 1.0 × 10-1 E. 1.5 × 10-1
A car starts out when the air temperature is 288 K and the absolute (total) air pressure in the tires is 500 kPa. After driving a while, the temperature of the air in the tires increases to 298 K
What is the pressure in the tires at that point, assuming their volume does not change? A) 129 kPa B) 483 kPa C) 507 kPa D) 517 kPa E) 532 kPa