Pam's family is clearing some land, and there is a large boulder sitting on top of the ground. Even with the entire family pushing on it, they cannot mov it. Which type of friction exists between the boulder and the ground

d

Explanation:

I believe the answer to this question is d , I believe this as the question doesn't explain properly the surface under the boulder. it is questionable as the question is not clear though I believe this as there must be friction under the boulder stopping it from moving.

a pan containing water is placed in a positio n where it is exposed to a 10 mile per hour wind. the pan contains a uniform depth of 1.27 cm of water, is quite wide, and has a length of 2.44 m in the wind direction. the water in the pan is at a constant temperature of 15.5 °c.

the answer is c.the valence of the atoms combine .