Questions asked by Tiko Sans

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• During takeoff, an airplane climbs with a speed of 163 m/s at 31° above the horizontal. The speed+direction of the airplane constitute a vector quantity called velocity. The sun shines overhead. How fast is the shadow of the plane moving along the ground?
  
• A student sees a newspaper ad for an apartment that has 1385 square feet (ft2) of floor space. How many square meters of the area are there?
  
• A hill that has a 17.6% grade is one that rises 17.6 m vertically for every 100.0 m of distance in the horizontal direction. At what angle is such a hill inclined above the horizontal?
  
• The three vectors in the drawing have magnitudes of A = 4.95 m, B = 4.90 m, and C = 4.10 m. Find the resultant of the 3 vectors by the component method. Express the angle as an angle above or below the + or - x-axis (Assume α = 23° / β = 52° )?
  
• Vector A has a magnitude of 12.0 units and points due west. Vector B points due north. (a) Magnitude of B if A+B is 14.4 units? (b) Direction of A+B relative to due west? (c) Magnitude of B if A-B has 14.4 units (d) Direction of A-B rel. to due west?
  
• Physics Vectors Help!!! Am I supposed to somehow use the Pythagorean theorem to answer this? I've tried multiple times to answer, but what is the best way to solve this sort of problem???
  
• Organic Chemistry 2 HELP!!! Below are the IR and mass spectra of an unknown compound. What two possible structures could be drawn for the unknown compound?
  
• A compound with molecular formula C12H24 exhibits a 1H NMR spectrum with only one signal and a 13C NMR spectrum with two signals. What structure could be drawn for this compound?
  
• A compound with molecular formula C7H14O2 displays the following IR, 1H NMR and 13C NMR spectra. Propose a structure for this compound?
  
• Physics help!!! How long will it take for the second-place cyclist to catch up with the leader??
  
• Physics: A car....?
  
• A diver springs upward with an initial speed of 1.6 m/s from a 4.5-m board. ?
  
• Organic Chemistry Predict the product(s)?
  
• Organic Chemistry Predict the product(s)? Could someone help? What did I do wrong???
  
• A skateboarder shoots off a ramp with a velocity of 6.9 m/s, directed at an angle of 62° above the horizo.......?
  
• A horizontal rifle is fired at a bull's-eye. The muzzle speed of the bullet is 657 m/s. The gun is pointed directly at the center of the bull's-eye......?
  
• An airplane with a speed of 53.6 m/s is climbing upward at an angle.....?
  
• A dolphin leaps out of the water at an angle of 43° above the horizontal. The horizontal component of the dolphin's velocity is 6.6 m/s. Find the magnitude of the vertical component of the velocity?
  
• A hot-air balloon is rising straight up with a speed of 3.8 m/s. A ballast bag is released from rest relative to the balloon at 9 m above the ground. How much time elapses before the ballast bag hits the ground?
  
• What reagents are necessary to carry out the following reaction?
  
• Organic Chem: What major product(s) for the following?
  
• Organic Chem: The transformation shown here can be achieved via a two-step synthesis. Draw the product of the first step of this synthesis?
  
• Organic Chemistry Help Please? D:
  
• Explain how the following two compounds can have the same conjugate base. Is this conjugate base aromatic?
  
• Organic Chemistry Multiple Reagents Help?
  
• Identify all of the major products?
  
• What is the order in terms of decreasing acidity?
  
• Provide the reactants?
  
• (PHYSICS HELP!) Two cars have identical horns, each emitting a frequency of fs = 409 Hz. One of the cars is moving with a speed of......?
  
• A mass attached to a spring of spring constant 200N/m undergoes a simple harmonic motion. If the mass is 2kg, what is the period of the oscillation?