Which of the following is not a technological way of improving air quality? a. using electrostatic precipitators b. installing solar panels c. composting d. building wind turbines

Air pollution is the initiation into the environment of chemicals, particulates, or organic elements that create distress, sickness, or death to humans. To examine how contaminated the air is an Air Quality Index (AQI) is in practice. This index corresponds to the people how contaminated the air is currently. As the AQI advances, the well-being of the people declines. The only way to reduce the AQI is to utilize the advanced technology.

Composting is a natural organic method, conducted below controlled aerobic circumstances (needs oxygen). In this method, several microorganisms, including bacteria and parasites, split down cellular material into single bodies.

force is mass*acceleration.

we have a very small mass: 11.4*0.001 kg

if we want 0.035n of force, we need an acceleration:

0.035 = 11.4*0.001*a

a = 0.035/(11.4*0.001) m/s^2

the motion of a pendulum is a classic example of mechanical energy conservation. a pendulum consists of a mass (known as a bob ) attached by a string to a pivot point. as the pendulum moves it sweeps out a circular arc, moving back and forth in a periodic fashion.