A student drew this molecular model to represent liquid water at 10 C.
How should the student change the model to best represent the water at 20•F?
A) Show the water molecules packed more tightly together.
B) Show some of the chemical bonds in the water molecules breaking
C) Show some of the water molecules forming chemical bonds with each other.
D) Show the water molecules with longer arrows to represent an increase in motion
Answers: 2
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Your starship, the aimless wanderer, lands on the mysterious planet mongo. as chief scientist-engineer, you make the following measurements: a 2.50-kg stone thrown upward from the ground at 14.0 m/s returns to the ground in 5.70 s ; the circumference of mongo at the equator is 2.20×10^5 km ; and there is no appreciable atmosphere on mongo. (a) the starship commander, captain confusion, asks for the following information: what is the mass of mongo? (b) if the aimless wanderer goes into a circular orbit 2.20×10^4 km above the surface of mongo, how many hours will it take the ship to complete one orbit? (c) an unmanned spacecraft is in a circular orbit around the moon, observing the lunar surface from an altitude of 44.0 km . to the dismay of scientists on earth, an electrical fault causes an on-board thruster to fire, decreasing the speed of the spacecraft by 23.0 m/s . if nothing is done to correct its orbit, with what speed (in km/h) will the spacecraft crash into the lunar surface?
Answers: 1
A student drew this molecular model to represent liquid water at 10 C.
How should the student chan...
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