When deciding which type of pump to use on a forest fire, which question would be the least important to ask first? A) How high does the water need to pump?
B) Is the water available for use that is free of sand and grit?
C) Do we have time to prime the pump before beginning?
D) How many additional parts are required for optimal functioning?

answer: a tank of height h is filled with water and sits on the ground. water squirts from a hole at a height y above the ground and has a range r. for two y values, 0 and h, r is zero. determine the value of y for which the range will be a maximum.

explanation:

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.