A boy uses a simple pulley to pull a block up a ramp. The height of the ramp is 4 m and the length of the ramp is 10 m Assuming that the ramp is frictionless, what is the ideal mechanical advantage of the ramp and does the pulley provide any additional advantage?

А The mechanical advantage of the ramp is 2.5, and the pulley does not provide any additional mechanical advantage.

B The mechanical advantage of the ramp is 10, and the pulley does not provide any additional mechanical advantage.

C The mechanical advantage of the ramp is 40, and the pulley does provide an additional mechanical advantage.

D The ideal mechanical advantage of the ramp is 0.4, and the pulley makes it easier to pull the block up the ramp.

Describe five factors that influence the value of fuel

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This map shows how climate change might affect precipitation patterns in the great plains of the united states by the end of this century. brown shoes a decrease in percipitation, and blue shows an increase. the maps differ based on the predictive levels of green house emissions. the maps shows that northern area should get a. more pracipations regardless of emmissions b. less pracipation, regardless of emmissions levels c. more precipitation, but only when emission levels.southern areas show a. more pracipations regardless of emmissions b. less pracipation, regardless of emmissions levels c. more precipitation, but only when emission levels.to use these maps to prepare for natural disasters in the great plains, scientist need to ask? a. how many tons of emissions were used at the basis of the map.b. which types of fossil fuels are used in the great plains c. if you think the above is wrong it's probly c the question is cut off