Waves combine to produce a smaller or zero-amplitude wave in a process called a. destructive interference. b. constructive interference. c. reflection. d. refraction.

you cant move and you feel like someones pushing you down onto your bed it can feel like you want to get up but you just can't it can be extremely scary

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kepler used the data from tycho blahe (his mentor) to construct the laws of planetary motion.

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2