4) A crate is at rest on an inclined plane. As the slope increases the crate remains at rest until the incline reaches an angle of 32.70

from the horizontal. At this angle the crate

begins to slide down the ramp.
A) What is the coefficient of static friction between the crate and the surface of the
ramp?
B) If the coefficient of kinetic friction between the surface of the ramp and the crate is
0.33, what would be the acceleration of the moving crate at this angle?

also need this before tomorrow

Calculate the amount of heat produced when 18000 coulombs of charge is transferred in one hour through a potential difference of 50v

This is the substance(s) formed in a chemical reaction.

You are a sales representative for a company that makes a new alternate fuel for vehicles. you have prepared a presentation for the environmental engineers to sell your new product. what question do you expect the audience to ask regarding whether the new fuel will cause less damage to the environment? a. do we have to change any parts of the vehicle to use this alternate fuel? b. will the vehicles get better fuel mileage with the alternate fuel? c. how much greenhouse gas does your fuel produce compared with current fuel sources? d. is the alternate fuel more expensive than fossil fuel?