a concrete brick is placed on a polished wood board which is initially laying horizontally on the floor. the static coefficient of friction is 0.63 between the board and the brick. the kinetic coefficient of friction is 0.55 between the two surfaces. we gradually raise one end of the wood board so that the board is tilted to increasingly larger angles, θ, relative to the horizontal. calculate the critical angle, θcrit at which the brick will start to slide along the wood board.

the answer is a. at the equator

hello, i am papaguy.

i have found an answer to your question but use it as information.

information: because weak acids/bases have low concentration of hydrogen ions, the addition of water has a large impact on the ph. 2. a difference in 1 unit is a 10x difference in concentration for example; a liquid with ph of 3 is 10x more acidic than a liquid with a ph of 4. therefore, a liquid with a ph of 3 is stronger.

best of luck!

multiple allele inheritance is traits controlled by more than 2 alleles (ex: pigeons having 3 alleles of one gene govern their feather color).

conservation of mass

mass before something happens = mass afterwards