Which of the following information does the electromagnetic spectrum tell us?
a: the wavelength of a wave
b: the resonance of a wave
c: the dispersion of a wave
d: the diffraction of a wave

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^?

An object's buoyant force and weight mean the same thing. a. trueb. false

Why does karst topography exist in some geographic location? a. few climates have enough oxygen b. most regions have rock layers other than limestone c. in most regions, the soil is too thin d. the water is too acidic enough in most places