QUESTION 8 Find the uncertainty in a calculated electrical potential difference from the measurements of current and resistance. Electric potential difference depends on current and resistance according to this function V(I,R) - IR. Your measured current and resistance have the following values and uncertainties I= 2.4 Amps, 81 = 0.2 Amps andR- 29.5 Ohms and SR = 0.6 Ohms. What is the uncertainty in the, SV ? Units are not needed in your answer.

The tolerance is ±1 in the 2nd significant digit.  "box your answer"

Identify the following systems shown below: Picture Answer Picture Answer 1. 2. 3. 4. 5.

18 please need help, keep in mind the 7 basic units and watch the sig figs. Please write in standard form need to see all the numbers in solution thank you so much

Electric charge q=-4.1 mC and mass m=3.1×10−6 kg moves with a speed v=9 km/s along the electric field (with it or against it). What is the speed of the charge after the charge travels through a potential difference AV=-3 kV. -6 Express your answer in km/s, rounded to three places after the decimal.

a) A typical small passenger electric vehicle has a range of 200 km on an electric charge of 33 kWh. Convert this number into J/km (Joules per kilometer traveled). b) A comparably sized gasoline powered vehicle to (a) is rated as 25 miles per gallon. Convert this number into J/km (Joules per kilometer traveled). c) If gasoline costs $10.00 per gallon, and electricity $0.30 per kWh what is the difference in the cost of fuel per kilometer travelled between the electric vehicle in (a) and the gasoline powered vehicle in (b)? d) Surveys of EV owners show that they charge at home 70% of the time. Let us assume that for the remaining 30% they charge at a 60 kW rated "fast-charge” station. If patterns of travel remain the same, but we swap all our gasoline vehicles for electric vehicles, what is the ratio between installation of fast charging stations to gasoline pumps retired. e) The Chicago Transit Authority has about 2700 buses that travel a total of 240,000 miles daily. A typical bus…