Questions asked by Fleur

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• Romeo is at `x = 0 m` at `t = 0 s` when he sees Juliet at `x = 6 m`... ?
  
• A sidewalk is to be constructed around a pool that measures `(10.0+-0.1) m` by `(17.0+-0.1) m`. If the sidewalk is to measure `(1.00+-0.01) m` wide by `(9.0+-0.1) cm` thick, what volume of concrete is needed and what is its approximate uncertainty?
  
• A `"0.4596 g"` sample of a pure soluble chloride compound is dissolved in water, and all of the chloride ion is precipitated as `"AgCl"` by the addition of an excess of silver nitrate. The mass of the resulting `"AgCl"` is found to be `"0.6326 g"`...?
  
• Ball `A` is dropped from rest from a building of height `H` exactly when ball `B` is thrown up vertically. When they collide `A` has double the speed of `B`. If the collision occurs at height `h` what is `h/H`?
  
• Why does chromium form a `"Cr"^(2+)` ion?
  
• The vector `vec A` is on a coordinate plane. The plane is then rotated counterclockwise by `phi`. How do I find the components of `vec A` in terms of the components of `vec A` once the plane is rotated?
  
• Why is pressure always negative in the formula `w = -P DeltaV`?
  
• Eliminate the parameter to find a Cartesian equation for `x = sin^2 t` and `y=2cost`?
  
• Differentiate `s=(1+sint)/(1+tant)` using the quotient rule?
  
• Evaluate `sin^4 15^@ + cos^4 15^@`?
  
• If `sin x + cos x = 1.2`, then `sin x - cos x` can be written in the form `+-sqrtA`. What is `A`?
  
• Determine the magnitude of a ball's radial acceleration?
  
• A person standing at the top of a hemispherical rock of radius R kicks a ball (initially at rest on the top of the rock) to give it horizontal velocity `v_i`. What must be its minimum initial speed if the ball is never to hit the rock after it is kicked?
  
• Three beakers each contain `"100 mL"` of acidic solution with a `"pH"` of `3.00`. The acids in the beakers are `"HCl"`, `"HNO"_2`, and `"HI"`. If `"50 mL"` of `"0.1 M NaOH"` is added to each beaker, which resulting solution will have the lowest `"pH"`?
  
• Find the change in `"pH"` that occurs when `"0.010 mol NaOH"` is added to `"1.0 L"` of a buffered solution containing `"0.50 M"` acetic acid and `"0.50 M"` sodium acetate?
  
• The gravitational force exerted on a baseball is `-F_ghatj`. A pitcher throws the ball, initially at rest, with velocity `v hat i` by uniformly accelerating it along a horizontal line for a time interval of `t`. What force does he exert on the ball?
  
• 50.0 mL of 0.10 M acetic acid is titrated with 10.0 mL of 0.10 M NaOH. What's the pH of the solution?