A motorcyclist sees a branch in the road,

and hits the brakes, slowing down at

-6.42 m/s2. If it takes him 2.85 s to stop,

what was his starting velocity?

(Unit = m/s)

Why is it that when a steadily flowing gas flows from a larger diameter pipe to a smaller diameter pipe, what causes the pressure in the smaller pipe to drop?

Conduction occurs when thermal energy is transferred by the movement of A waves B molecules C liquids D fluids

During constructive interference, two waves moving through the same medium willAnswer not occupy the same space amplify each other move around each other cancel each other out

Friction in machines is commonly reduced by using what?

A car travels at a constant speed around a circular track whose radius is 3.27 km. The car goes once around the track in 380 s. What is the magnitude of the centripetal acceleration of the car?

Explain how birthrates and death rates influence the size of population.

What happens to the resistance of a wire as its length increases? A. The resistance decreases. B. The resistance is not affected by a change in wire length. C. The resistance alternates between high and low values. D. The resistance increases.

What is true about molecular compounds that dissolve in water

What is a lenticular (S0) galaxy? A galaxy with a disk and central bulge like a spiral galaxy, but with no spiral arms A galaxy with a smooth brightness profile, lacking the central bulge and disk of a spiral galaxy A spiral galaxy with fuzzy and

Which process causes wells on land to become saline, making them unusable for drinking water? A. Erosion B. Echo sounding C. Eutrophication D. Groundwater infiltration