Cyrtomium falcatum. 1  Aptly named, Japanese holly fern produces fronds that do indeed resemble holly leaves with their glossy, deep green leathery appearance. 2  It needs moist but well-drained soil in a protected location to thrive. 3  It also makes for a good houseplant in climates where it isn't hardy.
A baseball bat is a third-class lever because the fulcrum is on the  end of one side, the effect force is in the middle, and the  resistant force, the load, is at the top.
For the study the researchers recruited 19 recreation league baseball players (all men) and had them take five practice swings with bats of different weights: a light bat, weighing just 9.6 ounces; a standard-weight bat (31.5 ounces); and a heavy warm-up bat (55.2 ounces).