the radii of the circles i, i0, and t give an estimate of the error in your experimental values for each of the horizontal ranges. using this estimate of uncertainty, what is the fractional uncertainty in each distance measurement? how do these uncertainties compare with the percent differences between the initial and final values of the kinetic energy, between the initial and final values of the x-component of the total momentum, and between the final y-components of the two balls?

Animals respond in various ways to stimuli detected through their senses. some of these responses are stimulated by the presence of danger. which of these animal responses is the best example of a response to an immediate threat? a) a rooster crows every morning at the first sign of light. b) as something approaches an octopus, it shoots a cloud of ink. c) from late fall until spring, bears hibernate to preserve energy. reactivate d) a dog is getting hot in the sunlight, so he moves to a shaded area.

True or false: the cycle of seasons on the earth is caused by the tilt of the earth on its axis toward and away from the sun.

How many atoms of nitrogen are in the chemical formula ni(w on