Which of the following air pollutants causes a reddish-brown haze in the sky?

a. sulfur dioxide.
b. carbon monoxide.
c. nitrogen dioxide.
d. carbon dioxide.

water at room temperature is flowing through a pipe with pressure taps located 10 ft apart along one section of the pipe, which are connected to a mercury (s=13.6) manometer.

weight of any object is given by

w = m*g

where m is mass of the object and g is the acceleration due to gravity.

for earth the value of g is 9.8 m/s^2 so

w=117.6 n m=12 g=?

117.6=12g => g=9.8 m/s^2

which is the force of gravity on earth.