Psychology uses both quantitative and qualitative research methods. Quantitative research focuses on numbers, qualitative on descriptions. Both methods are crucial for understanding human behavior
Experimental group receives independent variable change, control group holds it constant. Multiple experimental groups can be compared against control group. Not all experiments require control group, but those with it are called controlled experiments
Time crystal is a quantum system with repetitive motion in lowest energy state. Frank Wilczek proposed time crystals in 2012 as time-based analogue to crystals. Time crystals break time-translation symmetry unlike ordinary crystals
Built in 1899 by Nikola Tesla for wireless power transmission research. Located on Knob Hill between Deaf and Blind School and Union Printers Home. Housed largest Tesla coil ever built, 49.25 feet in diameter
Galileo allegedly dropped unequal weights from Leaning Tower between 1589-1592. Viviani claimed experiments were conducted with professors and students. Most historians consider it a thought experiment rather than physical test. Galileo's earlier prediction was that same-material objects fall at same speed. Experiment disproved Aristotle's theory of gravity
Muzafer Sherif studied 22 boys in Oklahoma's Robbers Cave Park. Initially, groups bonded, then competed for resources. Shared tasks eventually led to intergroup reconciliation