| 1. |
Ohm's law states that the voltage drop across a resistance is equal to the current flow through the resistor times the resistance of the resistor (V = IR). An apparatus is set up to make sure the voltage drop across the resistor is kept at a constant 10 volts. Two circuits are tested. In one the resistance (R1) of a single resistor is 1,100 ohms and in the second circuit the resistance of resistor (R2) is 1,700 ohms. Assuming Ohm's law holds perfectly true, the current (I) through R1 should be greater than that of R2 by what percent? Round your answer to the nearest hundredth of a percent.
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| 2. |
Racer Joe made four laps around Smallville racetrack with an average speed of 189.6 miles per hour. Speedy Bob made a set of four laps with an average speed of 196.3 miles per hour. Bob's speed was what percent of Joe's speed? Round your answer to the nearest hundredth of a percent.
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| 3. |
* This is a pre-made sheet.
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| 4. |
Mr. Bloop drives 16 kilometers at an average speed of 55 km/hr. Mrs. Bloop drives the same distance at an average speed that is 1% faster than Mr. Bloop's. How long does it take her to travel the 16 km distance? Round your answer to the nearest hundredth of a minute.
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| 5. |
The pressure at which a liquid boils is by definition the pressure that equals the atmospheric pressure pushing back on the surface of the liquid. Water boils at 100 C at sea level where the pressure is 1 standard atmosphere. If at a higher altitude the water boils at 99.6C, the pressure must then be a bit less than 1 atmosphere. In this example, by what percent did the boiling temperature change? Round your answer to the nearest hundredth of a percent.
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| 6. |
Brandon's soapbox racer completed a half-mile course in 3 minutes and 12 seconds. Christian's car completed the same course in 2 minutes and 49 seconds. The average speed of Christian's car was what percent of Brandon's? Round your answer to the nearest hundredth of a percent.
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