The sound of 40 decibels is
A) twice as intense as the sound of 20 decibels.
B) four times as intense as the sound of 20 decibels.
C) 10 times as intense as the sound of 20 decibels.
D) 100 times as intense as the sound of 20 decibels.
E) 1000 times as intense as the sound of 20 decibels.
D
You might also like to view...
Two charges of 15 pC and ?40 pC are inside a cube with sides that are of 0.40-m length. Determine the net electric flux through the surface of the cube.
A. +2.8 N ? m2/C B. ?1.1 N ? m2/C C. +1.1 N ? m2/C D. ?2.8 N ? m2/C E. ?0.47 N ? m2/C
Discuss the observational phenomena that are associated with the existence of neutron stars
What will be an ideal response?
Which of the following explains why, a million years from now, Alpha Centauri will no longer be the nearest star system to our own?
A) Earth rotates once each day. B) Earth orbits the Sun once each year. C) The direction of Earth's axis in space precesses with a period of about 26,000 years. D) Stars appear to move randomly relative to our Sun in the local solar neighborhood. E) The universe is expanding.
Over time, the star-gas-star cycle leads the gas in the Milky Way to
A) have a greater abundance of heavy elements. B) have a lower abundance of heavy elements. C) become denser and have a greater abundance of heavy elements. D) become denser and hotter.