A. Leo H Baekeland B. Karl Benz C. Evangelista Torricelli D. Kirkpatrick Macmillan
A. Thomas Edison B. John Kruesi C. Jules Levy D. Alexander Graham Bell Explanation: John Kruesi was a mechanic for…
A. Charles Goodyear B. Leo Hendrik Baekeland C. Roy Plunkett D. Henry Ford Explanation: Leo Hendrik Baekeland invented the first…
A. Jethro Tull B. Arlo Guthrie C. Woodie Guthrie D. Thomas Hines Explanation: It was invented around the early 1700's.
A. 1915 B. 1934 C. 1923 D. 1942 Explanation: Milk Tray was introduced in 1915 in open boxes arranged on…
A. 1770 B. 1765 C. 1790 D. 1742 Explanation: The first toothbrush was made out of a bone and small…
A. John J. Loud B. Sir Frank Whittle C. Lewis E. Waterman D. Kirkpatrick Macmillan