3.A pendulum is created by hanging a mass on 0.80 m long string. What is the period of the pendulum? *
(1 Point)
0.28 s
0.50 s
1.78 5
5.62 s

What makes thermal imaging cameras useful? they can detect differences in color. they can detect differences in wave speeds. they can detect differences in temperature. they can detect mechanical waves.

Acompound machine is also called a machine. a. force b. simple c. complex d. directional

Which of these statements is true? a. quarks pair with leptons to form protons and neutrons. b. quarks pair with bosons to form photons. c. quarks pair with photons to form protons and neutrons. d. quarks pair with other quarks to form protons and neutrons. e. quarks pair with electrons to form protons.