Calculate the sound intensity level in decibels for a sound wave travelling in air at 0oC and having a pressure amplitude of 0.656Pa (ρ=1.29kg/m3; vw= 331m/s). (a) 74dB
(b) 87dB
(c) 80dB
(d) 36dB

An object weighs 40n in air, weighs 20n when submerged in water and 30n when submerged in a liquid of unknown density. what is the density of the liquid?

Choose the most likely outcome of this scenario: jen decided to go bike riding without a helmet. while no one is around during her ride, she is thrown from her bike when her wheel goes into a pothole. she is not injured, but she is terrified to get back on her bike. what happens next? a. her physical health is affected even though she wasn't hurt. b. her mental and emotional health are affected because she is afraid to get back on her bike. c. her social health is affected because she is worried her friends saw the fall. d. her overall health is not affected at all by her fall.

If a balloon is taken outside on a very cold day, what will occur?