Recent content by kokenwa

  1. K

    Electromagnetic Waves

    Suppose some astronauts have landed on Jupiter. (a) When Jupiter and Earth are on the same side of the Sun and as close as they can be to one another, how long does it take for radio transmissions to travel one way between the two planets? Suppose the astronauts ask a question of...
  2. K

    Radio transmission

    Suppose some astronauts have landed on Jupiter. (a) When Jupiter and Earth are on the same side of the Sun and as close as they can be to one another, how long does it take for radio transmissions to travel one way between the two planets? Suppose the astronauts ask a question of...
  3. K

    Chemical Equation

    there are none. it just shows PbBr2
  4. K

    Chemical Equation

    the Ksp of lead (II) bromide is 6.3E-6. A large amount of PbBr2 sits at the bottom of a beaker with water above it. Equilibrium is reached. Write the chemical equation fo rthe dissociation of lead II bromide as it dissolves for which the Ksp applies. -How would i go about solving this problem?
  5. K

    Physics-electron charge transfer

    i got 3.066nC for the sphere by multiplying the transfer charge by the nC charge for the sphere but i cant find it for the rod. what do i do next?
  6. K

    Physics-electron charge transfer

    the charge on each electron is 1.6E-19C or 1.6E-10nC.
  7. K

    Physics-electron charge transfer

    physics--electron charge transfer A metallic sphere has a charge of +4.2 nC. A negatively charged rod has a charge of -6.0 nC. When the rod touches the sphere, 7.3E9 electrons are transferred. What are the charges of the sphere and the rod now? i dont even know where to begin. can i get...
  8. K

    Sound wave intensity

    i put in 2.35 x 10^-5 and it was still wrong
  9. K

    Sound wave intensity

    Homework Statement Michelle is enjoying a picnic across the valley from a cliff. She is playing music on her radio (assume it to be an isotropic source) and notices an echo from the cliff. She claps her hands and the echo takes 1.2 s to return. (a) Given that the speed of sound in air is 343...
  10. K

    What is the speed with which she lands?

    A pole-vaulter of mass 60kg vaults to a height of 6.0m before dropping to thick padding placed below to cushion her fall. What is the speed with which she lands? -I know it has something to do with momentum, but I dont even know where to begin on this one
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