Electron – Nucleus Applet
Pretzelscope
Review
In the video the glass rod becomes positively charge. When the rod approaches the pretzelscope the
leaves separate, the person grounds the scope (leaves fall) then removes
the rod, the leaves separate and remain separated. Why does this
occur? Draw a diagram of the end result.
Remember only electrons are mobile
ReviewA frictionless cart with mass of 80kg rolls down a track from a height of 20 meters from the ground, what is the velocity of the cart when it reaches ground level?
Electroscope
Draw a diagram representing the charge in the electroscope (assume a negatively charged comb). What is the method used to charge the electroscope? What other method could be used?
Review
Calculate the work done to move an electron from one point to another in
household circuit (120V).
An electric field is measured using a positive test charge of 3x10^-6 C. The test charge experiences a force of .12N at an
angle of 15 degrees north of east. What are the magnitude and direction of the electric field strength at the location of
the test charge.
Find the resistance of an aluminum conductor (cylindrical)
2 meters long with a diameter of .25 meters.
Review
To increase the brightness of a desk lamp, a student replaces a 60-watt light bulb with a 100-watt bulb. Calculate and compare the current and resistance for the two bulbs. Remember the voltage of a household circuit.
Review – Series Circuits
Draw and label a circuit diagram for the given image. If the battery is 3V and the bulbs each have an internal resistance of 11ohms, calculate the current within the circuit.
Review – Series and Parallel
Calculate the equivalent resistance of the circuit, the voltage drop for R1 and R2, and total current.
A cannonball is fired from ground level at an angle of 60 degrees and with a speed of 72
m/s. A. What is the time of flight?
Neglect friction
Review – Projectile Motion
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