For asteroids without close-up images from spacecraft, we can still learn about their shapes based on their… distance from the Sun.

brightness variations.

orbital trajectories.

magnetic field strength.

Free runners jump long distances and land on the ground or a wall. how do they apply newton’s second law to lessen the force of impact?

Because light travels in a straight line and casts a shadow, isaac newton hypothesized that light is

A5 foot by 5 foot box culvert is buried 6 feet beneath the surface of the ground. a crosssection of this very long culvert (into and out of the page) is illustrated below. assume that the soil in which the culvert is buried has the following properties: jt = 120 pcf, w = 12%, ko = 0.50, ka = 0.33, and kp = 3.00. calculate the total horizontal force per unit length of culvert (fh) felt on one of the vertical faces of the culvert.