You are 15.0m from the source of a sound. at that distance, you hear it at a sound level of 20.0db. how close must you move to the sound to increase the sound level to 60db? i think its 45.0cm? 15.0cm 45.0cm 55.0cm 60.0cm 85.0cm

Which of the following represents an upside-down image? o a. +doo b. -doo c. +mo d.-m

Light from the sun reaches the earth in 8.3 minutes. the velocity is 3.00 x 10^8 m/s. how far is earth from the sun? i know how to get to d = (3 x 10^8 m/s)(498 sec). i just don't know how to get from there to the answer being 1.5 x 10^11 m.

The magnetic field inside a superconducting solenoid is 4.50 t. the solenoid has an inner diameter of 6.20 cm and a length of 26.0 cm. determine (a) the magnetic energy density in the field and (b) the energy stored in the magnetic field within the solenoid.