You are a police officer who arrives at a scene of an accident. The only evidence that you have is the skid mark left on the road. Fortunately no one gets hurt. The driver indicates that he was not speeding. How could you be sure that he was speeding or not. Explain how you would
calculate and analyze his speed. You can use the formula : W = change in kinetic energy (energy- work theorem).

Sara is creating an experiment. her hypothesis states the following. if i increase the air in my tires, then i will get better gas mileage. if this is her hypothesis what column titles do we need in our date table? a. air pressure in tire (psi) and gas mileage (mph) b. air pressure in the atmosphere (psi) and gas mileage (mph) c. miles (m) and gallons per mile (g) d. old battery and new battery

1. a camcorder has a power rating of 19 watts. if the output voltage from its battery is 7 volts, what current does it use?answer units 2. a 1.5m wire carries a 6 a current when a potential difference of 57 v is applied. what is the resistance of the wire? yourunits 3. a clothes dryer uses about 2 amps of current from a 240 volt line. how much power does it use? yourunits 4.

Need only answer if you think you know it