Make your bubble juice. Mix 1 gallon of water with 2/3 cup dishwasher soap. 2. Tape the plastic lid over the end of the flashlight that the light shines from. 3. Turn on the flashlight and hold it so the light shines straight up. 4. Dip your finger in the bubble juice and wet the lid. Put a spoonful of bubble juice on the lid. 5. With a straw, blow one big bubble in the juice to make a bubble dome over the lid. 6. Watch the swirling colors until your bubble pops. 7. What colors did you see. Record this in your data table. 8. Repeat 2 more times.

How much heat is needed to change the temperature of 3 grams of gold (c = 0.129 ) from 21°c to 363°c? the answer is expressed to the nearest whole number.

Which of the following represents a virtual image?

Part f - example: finding two forces (part i) two dimensional dynamics often involves solving for two unknown quantities in two separate equations describing the total force. the block in (figure 1) has a mass m=10kg and is being pulled by a force f on a table with coefficient of static friction îľs=0.3. four forces act on it: the applied force f (directed î¸=30â above the horizontal). the force of gravity fg=mg (directly down, where g=9.8m/s2). the normal force n (directly up). the force of static friction fs (directly left, opposing any potential motion). if we want to find the size of the force necessary to just barely overcome static friction (in which case fs=îľsn), we use the condition that the sum of the forces in both directions must be 0. using some basic trigonometry, we can write this condition out for the forces in both the horizontal and vertical directions, respectively, as: fcosî¸â’îľsn=0 fsinî¸+nâ’mg=0 in order to find the magnitude of force f, we have to solve a system of two equations with both f and the normal force n unknown. use the methods we have learned to find an expression for f in terms of m, g, î¸, and îľs (no n).