The speed of a note created by a flute will increase as the speed of sound increases. when a marching band goes outside on a cold day, what would you predict would happen to the note played on a flute?
a) it would decrease because the speed of sound and temperature are proportional.
b) it would increase because the speed of sound and temperature are proportional.
c) it would decrease because the speed of sound and temperature are inversely proportional.
d) it would increase because the speed of sound and temperature are inversely proportional.

If the chemical properties of a substance remain unchanged and appearance or shape of a substance changes it is called a ?

The astronauts on the space shuttle flights experienced an acceleration of 29 m/s2 (about 3 "g's") during lift-off. what upward force must the astronaut's seat apply to the astronaut in order to cause this acceleration? assume the astronaut's mass is 70 kg, and compute this force when the acceleration is near the earth's surface so their weight equals latex: mg m g .

Aflask with vinegar in it has a mass of 160 grams. a balloon with baking soda in it has a mass of 40 grams. the balloon is attached to the flask to seal the opening and the vinegar and baking soda mixes. the balloon inflates to a large volume. what will the total mass of the balloon and flask be after the balloon inflates? explain. a) less than 200 grams because the solid baking soda disappears. b) 200 grams, because all the atoms remain in the balloon or flask. c) more than 200 grams because the size of the balloon is so much larger. d) less than 200 grams because gases such as the one in the balloon are lighter than solids and liquids.