The development of cars has pros and cons. The car has allowed for better transportation, but it is also responsible for a great deal of pollution. Which activity can help reduce pollution through the use of new technology? A. Encouraging people to ride the bus B. Encouraging people to walk C. Building fewer cars D. Building cars that run on nonpulluting fuels

What is the average speed of a car that travels 40 mph for 1 hour and 60 mph in another hour?

I'm thinking it's 2 you are asked to explain the earth's magnetic field. which is the best reply? 1. the earth's magnetic south is similar to the north pole of a magnet. 2. the earth's core has a strong magnetic charge similar to the south pole of a magnet. 3. the earth's geomagnetic south is similar to the south pole of a magnet. 4. the earth's magnetic charge is not centered at either pole; it varies based on location.

You have a resistor and a capacitor of unknown values. first, you charge the capacitor and discharge it through the resistor. by monitoring the capacitor voltage on an oscilloscope, you see that the voltage decays to half its initial value in 2.70 miss . you then use the resistor and capacitor to make a low-pass filter. what is the crossover frequency fc?