18) As planets interact with the Sun in our solar system, the force of gravity plays a role in their revolutionary orbit. Which
of these describes how the planets revolve around the sun due to its gravitational pull?
1)
A)
The planets have a linear path back and forth past the Sun.
B)
The planets have a circular path with the Sun at the center of the circle.
The Sun rotates around the planets, which are stationary in the solar
system.
The planets have an elliptical path with the Sun at one of the foci of the
ellipse.
)
D)

While studying chemical reactions and conservation of matter, sarah's class conducted a variety of experiments. sarah and her lab partner found the mass of a wax candle and placed the candle in a flask. the students lit the candle and let it burn to completion. all that was left was wax and charred candle wick. per their teacher's instructions, the students found the mass of the products. their data can be seen in the data table. formulate a hypothesis the students could test to explain why the experiment did not support the law of conservation of matter. a) the students could repeat the experiment using different candles; there might have been a flaw in the candle. b) the experiment should be repeatable. the students should run several trials and then take an average of the after mass in each trial. c) the students should have someone in the class check their measurement skills as they repeat the experiment. they may have made an error using the balance. d) the students should burn the candle in a container that has some type of lid so that any gas that is a product of the reaction can be contained and massed. submit

The electronic structure or chlorine is 2.8.7 what is the electronic structure of fluorine?

Aperson touches a large chunk of ice with their hand and remarks, “this is making me cold.” explain what this person is feeling. is the ice transferring “cold” to the person? is there a heat transfer occurring? explain.