A concave mirror is to form 0.5m long image of a 5mm lamp filament on a screen 5m from the mirror. What is the distance at which the filament is to be placed in front of the mirror?

When many atoms are split in a chain reaction, a large explosion occurs. this is an example of what type of energy conservation

Which units can be used to measure length or distance? check all that apply. gram meter kilometer liter inch

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.