THE GEOCENTRIC MODEL Ancient scientists believed in the geocentric model, which stated that
Earth was the center of the solar system, as evidenced by the motion of
celestial bodies throughout the sky each day. However, as knowledge and
technology improved, other ideas began to emerge. With the advent of the
telescope, the path of the solar system's bodies could be more accurately
determined. New evidence began to emerge, and eventually a new theory,
the heliocentric, or Sun-centered, solar system, was developed.
Why did the knowledge about Earth's position in the solar system change?
A. Because scientists could not find enough evidence to support their original solar
system theories.
B. Because celestial bodies changed their positions in space and eventually Earth
orbited the Sun.
C. Because new technology gave scientists new evidence that changed their
interpretation of celestial movement.
D. Because new technology made it easier for scientists to think of more plausible
stories to describe natural events.

Problem #3 (ch. 1, problem 15)the ideal gas law provides one way to estimate the pressure exerted by a gas on a container. the law isí‘ťí‘ť=푛푛푛푛푛푛푉푉more accurate estimates can be made with the van der waals equationí‘ťí‘ť=푛푛푛푛푛푛푉푉â’푛푛푟푟â’푞푞푛푛2푉푉2where the term nb is a correction for the volume of the molecules and the term an2/v2is a correction for molecular attractions. the values of a and b depend on the type of gas. the gas constant is r, the absolutetemperature is t, the gas volume is v, and the number of moles of gas molecules is indicated by n. if n = 1 mol of an ideal gas were confined to a volume of v = 22.41 l at a temperature of 0â°c (273.2k), it would exert a pressure of 1 atm. in these units, r = 0.0826.for chlorine gas (cl2), a = 6.49 and b = 0.0562. compare the pressure estimates given by the ideal gas law and the van der waals equation for 1 mol of cl2 in 22.41 l at 273.2 k. what is the main cause of the difference in the two pressure estimates, the molecular volume or the molecular attractions?

Main expenses you plan on making payments on a new car too. you want to spend 15% of your monthly net pay on the car payment, insurance, registration, and taxes combined. what is your monthly car allowance? $149.46 $298.91 $448.37 $597.83

In which reaction is precipitation occurring?