In the previous parts, you obtained the following equations using newton's 2nd law and the constraint on the motion of the two blocks: m2a2x=t−m2gsin(θ) m1a1y=t−m1g,(2) and a2x=−a1y.(3) solve these equations to find a1y. before you enter your answer, make sure it satisfies the special cases you already identified: a1y=−g if m2=0 and a1y=0 if m1=m2 and θ=π/2. also make sure that your answer has dimensions of acceleration. express a1y in terms of some or all of the variables m1, m2, θ, and g.

Which lists the main components of darwin’s theory of evolution? a. random mutations drive evolution; the evolution of a population happens slowly; organisms have common ancestors; organisms do not change. b. natural selection drives evolution; the evolution of a population happens slowly; organisms have common ancestors; organisms change over time. c. natural selection drives evolution; the evolution of a population happens rapidly; organisms have common ancestors; organisms change over time. d. random mutations drive evolution; the evolution of a population happens rapidly; organisms have common ancestors; organisms do not change.

Africtionless piston-cylinder contains 50 l of saturated liquid r-134a. the piston has a mass and an area resulting in an applied pressure of 500 kpa on the refrigerant. the refrigerant is now heated until its temperature rises to 70∘c. calculate the work (in kj) done during this process.

Explain what happens at the saturation point when adding salt to water at room temperature.