6. A certain quantity of helium gas is at a temperature of 27°C and a pressure of 1.00
atm. What will the new temperature be if its volume is doubled at the same time
that its pressure is decreased to one-half its original value? (Hint: Three variables
have been given so what equation will you use?)
I

Calculate the frequency of a wave in a spring toy. the wave has a speed of 1.1 meters per second and a wavelength of 0.1 meters. *

Two metal blocks that have slightly different temperatures are placed next to one another. after five minutes, they both have lower but equal temperatures. according to the law of conservation of energy, what  most likelyhappened? energy was created inside the blocks. energy was destroyed inside the blocks. energy was absorbed into the blocks from outside the system. energy was transferred from the warmer block to the cooler block.

Which is an example of a reversible physical change?