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  1. K

    The Forces of Rolling

    The question is: A wheel is rolling smoothly on horizontal surface. There is a constant horizontal force of magnitude 10 N. Wheel has mass of 10 kg, and radius of 0.3 m. The accel. of its centre of mass has mag. of 0.6 m/s^2. I am asked to find frictional force in unit-vector notation. This...
  2. K

    Net Ionic Equation clarification

    I obtained a net ionic equn' as follows Ba +2 (aq) + SO4 2- (aq) ----> BaSO4 (s) Now I need clarification for the following question and my answer to it. What is the max amount of solid product that could be obtained by reacting one mole of each reactant? I believe that b/c of the...
  3. K

    Car Question

    Car Question !!! Two Jeeps P and B race along straight lines, across flat terrain, and past stationary border guard A. Relative to the guard, B travels at a constant speed of 20.0 m/s at the angle theta=30.0*. Relative to the guard, P has accelerated from rest at a constant rate of 0.400 m/s^2...
  4. K

    Help with Stoichiometry and Volumetric Analysis

    I need some help with this question. A piece of chalk (mainly calcium carbonate) is placed in 250 mL of 0.293 M HCl. All the CaCO3 reacts, realising CO2 gas, and leaving a clear solution. 50.00 mL of the solution is pipetted into another flask. 87.1 mL of 0.0567 M NaOH is required to titrate...
  5. K

    Standardization of An Acid

    It requires 46.5 mL of 0.215M NaOH to neutralize 15.0 mL of aqueous H2SO4. What was the molarity (M) of the acid sample? I'm not quite sure how to approach this quesiton, if anyone has and starter tips please let me know.
  6. K

    The acceleration of a particle on a horizontal xy plane

    The acceleration of a particle on a horizontal xy plane is given by a=3ti + 4tj, where a is in meters per second-squared and t is in sec. At t=0, the particle has the position vector r=(20.0m)i + (40.0m)j and the velocity vector v=(5.00m/s)i +(2.00m/s)j. At t=4.00 s, what are its position...
  7. K

    Basic Physics Volcano Question

    During volcanic eruptions, chunks of solid rock can be blasted out of the volcano; these projectiles are called volcanic bombs. At what initial speed would a bomb have to be ejected, at angle 35* to the horizontal, from the vent at A in order to fall at the foot of the volcano at B, at vertical...
  8. K

    Basics Physics VECTOR Question

    The acceleration of a particle on a horizontal xy plane is given by a=3ti + 4tj, where a is in meters per second-squared and t is in sec. At t=0, the particle has the position vector r=(20.0m)i + (40.0m)j and the velocity vector v=(5.00m/s)i +(2.00m/s)j. At t=4.00 s, what are its position...
  9. K

    Basic Physics Question please help

    2 seconds after being projected from ground level, a projectile is displaced 40 m horizontally and 53 m vertically above its launch point. What are the horizontal and vertical components of the initial velocity of the projectile? At the instant the projective ahieves maximum height above...
  10. K

    Vector Question any suggestions?

    A plane flies 483 km east from city A to city B in 45.0 min and then 966 kim south from city B to city C in 1.50 h. For the total trip, what are the magnitude and direction of the plane's displacement, the magnitude and direction of its average velocity, and its average speed?
  11. K

    HELP Assignment due in an hours

    HELP !!! Assignment due in an hours A gold ball is hit from ground @ 25* to the horizontal. When it lands, it has a velocity of 20 m/s @ 30* below horizontal. A) find initial speed B) time that ball is in air C) height of landing pt. relative to start pt, which may be positive or negative
  12. K

    Help stuck with vector problem.

    If anyone's got any hints or directions as to how to go about solving this problem, PLEASE help!!! An explorer is caught in a whiteout (in which the snowfall is so thick that the ground cannot be distinguished from the sky) while returning to base camp. He was supposed to travel due north for...
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