Answers created by Ed Hitchcock

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• Question #24009
  
• Question #a52b1
  
• Question #d0ea6
  
• How do atoms relate to molecules. How many atoms specify a molecule?
  
• How do you graph the line through point (-2,-3) and slope is undefined?
  
• Question #73eb1
  
• What does it mean to be "lactose" intolerant? What enzyme is lacking in these individuals?
  
• If the main purpose of cellular respiration is to make ATP, why do glycolysis and the Krebs Cycle only make 4 total ATP by the time glucose is converted to carbon dioxide?
  
• If an object with uniform acceleration (or deceleration) has a speed of #5 m/s# at #t=0# and moves a total of 15 m by #t=12#, what was the object's rate of acceleration?
  
• Why is it, when you see the earth from space, there are no stars in the background? What causes this, and why?
  
• How would you explain the photoelectric effect in terms of energy?
  
• What is a sea breeze?
  
• What percent of 33.5 is 21?
  
• Wavelengths of light from a distant galaxy are found to be 0.44% longer than the corresponding wavelengths measured in a terrestrial laboratory. What is the speed that the wave is approaching?
  
• What are stars that pulsate in and out called?
  
• How did scientists determine how fast earth's orbit is around the sun?
  
• How strong is the force of gravity on earth?
  
• Question #e170d
  
• How many atoms of oxygen are there on each side of the chemical equation #2Mg + O_2 -> 2MgO#?
  
• What were the contributions of Mendeleev to the periodic table?
  
• How many years after the Big Bang did the planets form?
  
• What is the furthest known star from our solar system?
  
• What is the distance between pluto and earth?
  
• Question #956d1
  
• Question #80170
  
• What is proof that evolution is true?
  
• A balanced lever has two weights on it, one with mass #8 kg# and one with mass #3 kg#. If the first weight is # 9 m# from the fulcrum, how far is the second weight from the fulcrum?
  
• How much work does it take to lift a #30 kg # weight #3/2 m #?
  
• If Josh pulls on a rope with a force of 45 N in the negative direction and Marissa pulls on the other end of the rope in the position direction with 56 N, what is the overall tension in the rope?
  
• A ball with a mass of #4 kg# moving at #6 m/s# hits a still ball with a mass of #9 kg#. If the first ball stops moving, how fast is the second ball moving? How much kinetic energy was lost as heat in the collision?
  
• Question #363c9
  
• Which reproductive system is more complex, a man's or a woman's?
  
• How many earth-like planets are thought to exist in the universe?
  
• If a #3/2 kg# object moving at #8 m/s# slows to a halt after moving #4 m#, what is the coefficient of kinetic friction of the surface that the object was moving over?
  
• What is our universe called?
  
• Brandy wants to buy a digital camera that costs $300. Suppose she saves $15 each week. In how many weeks will she have enough money for the camera?
  
• Which layer do you see when you look at a typical image of the sun?
  
• Question #bda95
  
• What does it mean to say that the gravity of the Earth is 9.8 m/s2?
  
• How long is an eon in years?
  
• What is the leading theory on how the moon formed? Are there any other theories? Does this theory explain why other planets in our solar might have satellites too? Or is it different for each planet?
  
• A charge of #8 C# is passing through points A and B on a circuit. If the charge's electric potential changes from #64 J# to #8 J#, what is the voltage between points A and B?
  
• Which object is at a greater distance from earth: Pluto, the sun, quasar or an asteroid?
  
• Question #978b1
  
• Question #2d616
  
• What is the size of the earth in comparison to the sun?
  
• What do transverse waves and longitudinal have in common?
  
• How much more intense is a 20-dB whisper than the threshold of human hearing?
  
• A man is loading a 172kg crate into a moving truck. The ramp makes an angle of 18° compared to the flat ground. What is the coefficient of kinetic friction between the crate and the ramp?
  
• What is the equation of a line with slope of #6/5# with a #y#-intercept of #8#?
  
• What is the life cycle of a star?
  
• How does cosmic background radiation affect earth?
  
• How do you write 0.00467 in scientific notation?
  
• I need to draw an energy pyramid for a five-step food chain. If 100% of the energy is available at the first trophic level, what percentage of the total energy is available at the highest trophic level?
  
• What is the relationship between stellar temperature, radius, and luminosity?
  
• Three consecutive integers have a sum of 84, how do you find the integers?
  
• If an object with a mass of #2 kg # changes speed from #14 m/s# to # 15m/s#, by how much does its kinetic energy change?
  
• When was the most recent visible supernova?
  
• Is the phenotype of an organism controlled by its genotype?
  
• How are pictures of the sun taken? For example, how do devices such as the Hubble Telescope take pictures of solar flares?
  
• Anew planet is discovered in a different solar system. The new planet is much like Earth. One difference is that the planet does not have tides. What does the planet lack that Earth has?
  
• If 8 ounces of canned pumpkin have 82 calories, how many calories are in one ounce?
  
• The question is below in the details section. its too big to be up here. adding a question mark as per regulations-?
  
• Question #78b0f
  
• How can carbon-14 be converted to carbon-12?
  
• What are the components of the vector between the origin and the polar coordinate #(-7, (5pi)/4)#?
  
• Has carbon 14 been found in fossils?
  
• Question #b8fe4
  
• How do you find the slope and intercept of #-2x - 3y = 1#?
  
• A projectile is shot at an angle of #pi/4 # and a velocity of # 5 m/s#. How far away will the projectile land?
  
• Question #931da
  
• What essential gas of today's modern atmosphere was absent from earth's early atmosphere?
  
• Why are Cepheid variable stars important to astronomers? How is the information they impart any more or less useful than using stellar parallax?
  
• What is the Moon's primary source of erosion? And why does the moon erode so much slower than earth?
  
• How do you convert 9π/8rad into degrees?
  
• Why are food chains sometimes short?
  
• What are the components of the vector between the origin and the polar coordinate #(1, (5pi)/4)#?
  
• How does a hurricane finally die down?
  
• Do plant cells contain mitochondria?
  
• In a marine ecosystem, phytoplankton perform photosynthesis. Krill eat the phytoplankton, and seals, whales, and sea birds feed on the krill. Finally, great white sharks hunt and eat the seals. Which of these organisms are consumers?
  
• A projectile is shot from the ground at an angle of #pi/8 # and a speed of #2 /7 m/s#. Factoring in both horizontal and vertical movement, what will the projectile's distance from the starting point be when it reaches its maximum height?
  
• If y varies directly with x, if x =9 when y = 18, how do you find x when y =24?
  
• How do you calculate half life of carbon 14?
  
• What does the gravity unit #m/s^2# stand for?
  
• What part of the cell membrane attracts water?
  
• How can only 20 amino acids form the amazing variety of proteins found in living organisms?
  
• Question #a16c1
  
• Can anyone explain Lenz's law with an example?
  
• How do you factor #x³+7x²+10x#?
  
• How do you solve #6 = a/4+2#?
  
• What is Carbon 14 radiocarbon dating?
  
• How do you find the slope and intercept of #3x + y = -2#?
  
• A projectile is shot from the ground at a velocity of #13 m/s# and at an angle of #(5pi)/12#. How long will it take for the projectile to land?
  
• A ball with a mass of #6 kg# moving at #3 m/s# hits a still ball with a mass of #8 kg#. If the first ball stops moving, how fast is the second ball moving?
  
• What is the force, in terms of Coulomb's constant, between two electrical charges of #18 C# and #-14 C# that are #15 m # apart?
  
• How much work does it take to raise a #4 kg # weight #9 m #?
  
• What is the difference between plate tectonics and continental drift?
  
• What is the equation of the parabola that has a vertex at # (9, -23) # and passes through point # (35,17) #?
  
• How do you solve the system of equations by graphing and then classify the system as consistent or inconsistent #5x-6y=-18# and #6y-5x=18#?
  
• What percent of 49 is 7?
  
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