Help me please! Which cause of eustatic sea-level changes leads to regressive sedimentary sequences?
A. land ice melting
B. seafloor spreading
C. thermal expansion
D. salt buildup

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^?

How does an observation about an object differ from an inference about that object

Which of the following types of electromagnetic radiation has the longest wavelength? a. infrared light b. visible light c. ultraviolet light d. microwaves