How does the flexible foam lining inside a bicycle helmet change the outcome of a collision so as to reduce the risk of head injury for a rider?
B. by transmitting the force away from the rider's head
C. by increasing the time over which force is exerted on the rider
D. by reducing the amount of the rider's mass on which the force acts
A. by reducing the rider's change in velocity

Select each correct answer. more than one answer may be correct. which of the following is a characteristic of unicellular organisms? they can possess tissues and organs. all of their functions are performed by a single cell. they are usually microscopic. each of their cells is specialized to perform a specific function.

How many moles of oxygen react with 12 moles of aluminum

Consider the following unbalanced equation for the combustion of hexane: αc6h14(g)+βo2(g)→γco2(g)+δh2o(g) part a balance the equation. give your answer as an ordered set of numbers α, β, γ, use the least possible integers for the coefficients. α α , β, γ, δ = nothing request answer part b determine how many moles of o2 are required to react completely with 5.6 moles c6h14. express your answer using two significant figures. n n = nothing mol request answer provide feedback