Answers created by Nam D.

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• The center of the moon is approximately 384000km from the center of the earth and orbits from the earth in 27,3 days . If a moon has a mass of 7,35×10^22 kg. what is the magnitude of its momentum?
  
• What is the moment of inertia of a pendulum with a mass of #9 kg# that is #10 m# from the pivot?
  
• How do you use the trapezoidal rule with n=4 to approximate the area between the curve #x ln(x+1)# from 0 to 2?
  
• The sum of two consecutive even integers is -34. What is the smaller integer?
  
• What is radioactivity?
  
• What does phosphorylation do to a molecule?
  
• What are some examples of quantum numbers?
  
• One half liter of lemonade concentrate is added to 3 liters of water. How many #1/3#-liter servings of lemonade are made?
  
• B) Calculate the energy required to heat up 50 kg of aluminium from 200C to 3000C. The specific heat capacity is 913 J/kg K. ?
  
• Are enzymes consumed during a chemical reaction?
  
• What is cell biology?
  
• How do you solve #log_10 root3(10)=x#?
  
• What is the derivative of the kinetic energy function?
  
• Is #x=y^2-2# a function?
  
• Josh pushes on a 70 kg box in the positive direction with a force of 50 N. Marissa pushes on the box in the negative direction with a force of 35 N. If the force of friction is 2N, what is the acceleration of the box?
  
• How many amino acids are coded for by a structural gene of 900 nucleotides?
  
• What is the correct name for this compound: #Ba_3P_2#?
  
• How many electron would have to ejected from a body to descrease its mass by 0.03 milligrams. The mass of one electron is 9.1*10 the minus 31kg?
  
• Why does calcium hydroxide raise soil pH?
  
• How to start studying biology?
  
• How do you solve the following with the quadratic formula?: #sqrt2x² - x - 3sqrt(2) =0#
  
• If a rocket with a mass of 3900 tons vertically accelerates at a rate of # 7/8 m/s^2#, how much power will the rocket have to exert to maintain its acceleration at 5 seconds?
  
• What is Haber process?
  
• How do you solve compound Inequality #2/5x<6# and # -1/2x <= -10#?
  
• How do physics and chemistry relate?
  
• How are fats absorbed and transported by the body?
  
• Which of the following correctly describes an oxidation-reduction reaction?
  
• C) If a train accelerates at 1.5 m/s2 calculate the time taken to increase its velocity from rest to 50 km/h and the distance travelled in this time. ?
  
• What are single bonds?
  
• How do you graph #(x+4)^2+(y-1)^2=9#?
  
• The specific heat of ice is 0.492 cal/(g × °C). How many calories of heat are required to raise 100.0 g of ice from -20.0 °C to -0.5 °C?
  
• How do you simplify #\frac{1}{3}x+2=\frac{1}{2}x-1#?
  
• How do you solve the inequality: #15c — 4 <= 12c + 5#?
  
• B) A pump is to raise 100 litre of water a height of 1.2 m in 10s. Calculate the power required assuming 1 litre of water has a mass of 1 kg?.
  
• Would you classify the synthesis of a protein from amino acids as anabolic or catabolic?
  
• How do you find the decimal notation 3%?
  
• What change will slow the rate of a chemical reaction?
  
• An insurance company paid $320 to Heather in compensation for her stolen camera. If this was 80% of its value, what was Heather's camera worth?
  
• What is the structure of a cell membrane?
  
• How do you condense #log_4(xy)^3-log_4(xy)#?
  
• To arrive on schedule,a train is to cover a distance of 60km at 72km/hr. If it starts 10min late,at what speed must it move to arrive on schedule?
  
• Can lasers be dangerous?
  
• Consider sodium, which has an atomic number of 11 and an atomic mass of 23. How many valence electrons does it have?
  
• How do you factor #x^2 - 8x + 16#?
  
• How is a bear's fur related to homeostasis?
  
• A balanced lever has two weights on it, the first with mass #12 kg # and the second with mass #4 kg#. If the first weight is # 15 m# from the fulcrum, how far is the second weight from the fulcrum?
  
• If you measure 50 mL of cooking oil and the cooking oil has a mass of 43g, what is the density of the oil?
  
• What are the center and radius of the circle defined by the equation #x^2+y^2-6x+4y+4=0#?
  
• How do you factor the trinomial # x^2-x-42#?
  
• How do you simplify #x^2-4x+3# for x=5?
  
• How do you simplify c square root c + 12c square root c - 2c square root c?
  
• A ball with a mass of #5 kg# moving at #2 m/s# hits a still ball with a mass of #3 kg#. If the first ball stops moving, how fast is the second ball moving?
  
• How many moles of aluminum do #3.8*10^24# aluminum atoms represent?
  
• Difference between bacteria and bacteroides ?
  
• In a particular class, each student has blonde hair and brown eyes; 1/4 of students with blonde hair have brown eyes and 1/3 of the students with brown eyes have blonde hair. what fraction of the class on total have brown eyes?
  
• A charge of #4 C# is passing through points A and B on a circuit. If the charge's electric potential changes from #27 J# to #15 J#, what is the voltage between points A and B?
  
• How are London dispersion forces between molecules produced?
  
• How many moles are in 198.34 g of Fe3(PO4)2?
  
• A ray of light travels from air into a liquid, The ray enters the liquid at an angle of 30.0°. The angle of refraction is 22.0°. Using Snell’s law, calculate the: index of refraction of the liquid. What might the liquid be?
  
• How do you simplify #\frac { 3x ^ { 3} y ^ { 2} } { 2x ^ { 2} y ^ { 3} }#?
  
• How can eukaryotic cells divide?
  
• 0.200 mol of octane is allowed to react with 0.690 mol of oxygen, which is the limiting reactant? 2 C8H18 + 25 O2 ----> 16 CO2 + 18 H2O.
  
• The deceleration of a point when it is momentarily at rest which is moving along a straight line with a velocity 16-t^2 is= ???
  
• How do molecules differ from one another?
  
• What does understading evolution teach us ?
  
• How do you solve # | x + 3 | = 5#?
  
• Which one is greater #5000cm.# or #5# meters?
  
• How do you simplify #3/8*3/8#?
  
• How do you multiply #sqrt81*sqrt36#?
  
• What is the gravitational potential energy of a # 2 kg# object on a shelf # 1/4 m # high?
  
• How can adding heat to a reaction change the rate of a chemical reaction?
  
• How do you solve #k-14=-13#?
  
• Why is mitosis important in the repair and growth of tissue?
  
• How much power is produced if a voltage of #2 V# is applied to a circuit with a resistance of #40 Omega#?
  
• What metals are more active than hydrogen?
  
• What is a community composed of?
  
• An isosceles triangle has a base of 20 cm and legs measuring 36 cm. How long are the legs of a similar triangle with base measuring 50 cm?
  
• How to use u substitution for #sin2x#?
  
• How do you translate "Twice a number increased by the product of 3 and 8" into an algebraic expression?
  
• How much power is produced if a voltage of #12 V# is applied to a circuit with a resistance of #24 Omega#?
  
• How many electrons can a d orbital have?
  
• How do you solve #2t - 2 = 19 - t#?
  
• What is DNA fingerprinting used for?
  
• A hiker travels in a straight line for 40 min with an average velocity that has magnitude 1.2 m/s. How far is she from her starting point after this time?
  
• What can we get from the electrolysis of NaCl in dissolved state?
  
• Find the simplest value of (32)-5/2÷(125)-2/3?
  
• If the length of a #13 cm# spring increases to #45 cm# when a #4 kg# weight is hanging from it, what is the spring's constant?
  
• What is the frequency of a wave of red light in the air where its wavelength is 6.8×10−7m?
  
• What do we call the process of movement of nutrients across the surface cells of the villi into the blood?
  
• How do you simplify #3!2!#?
  
• The length of a rectangle is #x+2# and the width is #x-6#. What is the perimeter of this rectangle?
  
• How do you find the percent change given the original number is 55 and new number is 50?
  
• Does a boy in rest have momentum?
  
• Why do we take an antacid when we have acid reflex/upset stomach?
  
• Nine less than a number is -24. How do you find the number?
  
• How does soap help remove germs more than just plain water does?
  
• How do you simplify #2x + 3 + x#?
  
• Sara can lift a 10-pound weight by applying 30 pounds of force to a lever. If the amount of force Sara needs to apply to a lever is proportional to the weight she can lift, how much force would she need to apply in order to lift a 25-pound weight?
  
• What are the substances that are on the left side of a chemical equation?
  
• A pair of pants with a marked price of $35.00 has a discount of 20%. How much is the discount?
  
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