Which evidence supports the big bang theory? Planetesimals form in debris disks.
Most galaxies are moving toward us.
Uniform background radiation is detected in every direction.
Galaxies spin faster than they should based on visible matter.

The position of a dragonfly that is flying parallel to the ground is given as a function of time by r⃗ =[2.90m+(0.0900m/s2)t2]i^− (0.0150m/s3)t3j^. a: at what value of t does the velocity vector of the insect make an angle of 34.0 degree clockwise from the x-axis? b: at the time calculated in part (a), what is the magnitude of the acceleration vector of the insect? c : at the time calculated in part (a), what is the direction of the acceleration vector of the insect?

How many hydrogen (h) atoms are in one molecule of sulfuric acid, h2so4? (1 points) 1 2 4 7

What are similarities and differences between refraction, reflection, diffraction and absorption?