A quarterback takes the ball from the line of scrimmage, runs backward for 9 yards, then runs parallel to the line of scrimmage for 16 yards. At this point, he throws a 47 yards forward pass straight down field, perpendicular to the line of scrimmage. What is the magnitude of the football’s resultant displacement? Answer in units of yards.

Scientific models are based on current knowledge, which can limit their effectiveness when new discoveries are made.

During the apollo moon missions, astronauts were concerned about the effects of newton's third law of motion when: o a. they ejected waste water, because they were concerned that it would push them off course. o b. they reentered earth's atmosphere, because they were carrying heavy moon rocks. o c. they took off from earth, because a large force was required to generate large acceleration. o d. they detected incoming space debris, because the inertia of the debris could damage their ship.

When you see distant streetlights through smog, they look dimmer and redder than they do normally. but when you see the same streetlights through fog or falling snow, they look dimmer but not redder. use your knowledge of the interstellar medium to discuss the relative sizes of the particles in smog, fog, and snowstorms compared to the wavelength of light.