Apipe open at both ends produces a fundamental frequency of 262 hz in air at 20°c. if the is filled with helium at the same temperature, what fundamental frequency does it produce? assume the speed of sound in helium is 972 m/s. assume the speed of sound in the air at 20°c is 343 m/s.
a. 972 hz
b. 430 hz
c. 741 hz
d. 1113 hz .

The energy released by a chemical reaction can be measured using a calorimeter. when barium hydroxide octahydrate crystals are reacted with dry ammonium chloride inside of a coffee cup calorimeter, the temperature of the 18.00 g of water in the calorimeter decreases from 30.0°c to 8.0°c. the equation for calculating energy absorbed or released by a reaction is: where q is the energy released or absorbed, m is the mass of water in the calorimeter, cp is the specific heat of water, and δt is the observed temperature change. if the specific heat of liquid water is 4.19 j/g·°c, how much energy was absorbed by the reaction?

Wavelength,frequency,and energy are related.what happens to a wave as it’s wavelength gets shorter?

Which notation is used to represent an alpha particle? a. b. c. d.