A first class lever in static equilibrium has a 50 lb resistance force and 15 lb effort force. The lever?s effort force is located 4 ft from the fulcrum. a. Sketch and annotate the lever system described above.
b. What is the actual mechanical advantage of the system?
c. Using static equilibrium calculations, calculate the length from the fulcrum to the resistance force.

volts times amps 6 x 0.5 3w

what experimental evidence led scientists to change from the previous model to this one?

a few of the positive particles aimed at a gold foil seemed to bounce back.

the colors of light emitted from heated atoms had very specific energies.

experiments with water vapor showed that elements combine in specific proportions.

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find the sum of the two horizontal vectors and the sum of the two vertical vectors

isoceles right angled triangle