If the results of a study do not support a hypothesis, it means that the experiment failed.

Certay not.  The purpose of the experiment is to test the hypothesis. If the results don't support the hypothesis ... and if you're sure that the experiment was correctly done ... then it says that the hypothesis is false.

we're given that v₀ = 0 and a = 5.4 m/s². therefore, since v = at + v₀ for constant acceleration the equation for velocity is

after 28s,

m/s

which i would round to 150 m/s as my final answer

the answer is ampere

the ampere is used to measure electricity. an ampere is a unit of electric current equal. a unit of measure for the flow of current in a circuit. one ampere is the amount of current flow provided when one volt of electrical pressure is applied against one ohm of resistance.