Chemistry, 05.10.2019 01:20 davis52202
Which of the following has the greatest kinetic energy?
a
o
a 20 kg stone traveling at 10 m/s
o
a 40 kg ball traveling at 4 m/s
o
a 30 kg lead pipe traveling at 6 m/s
o
a 50 kg pillow traveling at 2 m/s
Answers: 1
Chemistry, 21.06.2019 22:30
Hot air balloons float in the air because of the difference in density between cold and hot air. in this problem, you will estimate the minimum temperature the gas inside the balloon needs to be, for it to take off. to do this, use the following variables and make these assumptions: the combined weight of the pilot basket together with that of the balloon fabric and other equipment is w. the volume of the hot air inside the balloon when it is inflated is v. the absolute temperature of the hot air at the bottom of the balloon is th (where th> tc). the absolute temperature of the cold air outside the balloon is tc and its density is ďc. the balloon is open at the bottom, so that the pressure inside and outside the balloon is the same. as always, treat air as an ideal gas. use g for the magnitude of the acceleration due to gravity.
Answers: 1
Chemistry, 22.06.2019 02:30
List four observations that indicate that a chemical reaction may be taking place
Answers: 1
Chemistry, 22.06.2019 18:50
Which of the following is a conclusion that resulted from ernest rutherford’s scattering experiment? (will mark brainliest) a. the nucleus is negatively charged b. the atom is a dense solid and is indivisible c. the mass is conserved when atoms react chemically d. the nucleus is very small and the atom is mostly empty space
Answers: 3
Which of the following has the greatest kinetic energy?
a
o
a 20 kg stone traveli...
a
o
a 20 kg stone traveli...
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