Posts Tagged ‘tennis balls’
">
Jessica Lundquist attaches a sensor to a tennis ball, and uses a dog-ball launcher to hook a branch between 20 and 40 feet high to record winter temperatures. Her system measures and records the temperature every hour for up to 11 months in remote locations for just $30 apiece.
U. WASHINGTON—Measuring snowmelt is as easy—and economical—as launching a tennis ball into a tree. Continue…
