What is a scientific theory? 1 A law that is always true
2 A hypothesis about nature
3 An educated guess based on observations
4 An explanation of how the natural world works

What color would an object that reflects green and blue light appear to be in white light? a. blue b. cyan c. magenta d. black

Aparticle with mass 1.81×10−3 kg and a charge of 1.22×10−8 c has, at a given instant, a velocity v⃗ =(3.00×104m/s)j^. what are the magnitude and direction of the particle’s acceleration produced by a uniform magnetic field b⃗ =(1.63t)i^+(0.980t)j^?

Ameter stick is pivoted at the 0.50-m line. a 3.0-kg object is hung from the 0.15-m line. where should a 5.0-kg object be hung to achieve equilibrium (the meter stick oriented horizontal and motionless)?