In using ray tracing to graphically locate the image of an object that is placed in front of a lens, describe three simple rays that you could draw that pass by the head of the object

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Ray 1: the vertex ray; i.e., the ray passing through the center of the lens, which emerges undeflected.
Ray 2: the parallel ray; i.e., the incoming ray parallel to the main axis, which is then refracted along a path that extends to the focal point.
Ray 3: the focal ray; i.e., the ray drawn toward the focal point, which is then refracted parallel to the main axis.

Physics & Space Science

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Acceleration: A racquetball strikes a wall with a speed of 30 m/s and rebounds in the opposite direction with a speed of 26 m/s. The collision takes 20 ms. What is the average acceleration of the ball during the collision with the wall?

A. 0 m/s2 B. 200 m/s2 C. 2800 m/s2 D. 1500 m/s2 E. 1300 m/s2

Physics & Space Science

The body which wiped out the dinosaurs was about:

A) as big as our Moon. B) as big as one of Mars' moons. C) a few hundred meters across. D) as big as a 747. E) as big as an SUV.

Physics & Space Science

Contrast Irr I and II in terms of structure

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Physics & Space Science

Name two ways the magnetic fields of Uranus and Neptune defy the normal behavior of planetary magnetic fields

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Physics & Space Science