12. Copper has 2 main isotopes, Cu-63 and Cu-65. Look up copper's atomic mass on the periodic table. a) Which isotope, Cu-63 or Cu-65, is most abundant in nature?
b) Explain how you can tell.

carla slowed down in the beginning of her trip, stopped, and then sped up

scorpions are,

c.arachnids

  scorpions are animals in the order scorpiones, under the class arachnida, which makes them a distant cousin of spiders

happy to

pls mark as brainliest.

see the picture for the vector

the magnitude of the vector by pythagorean theorem

r = √( (-10)^2 + (3)^2 ) = √109

magnitude = √109 units

the direction angle between vector and x-axis is

tan^(-1)(3/10) = 16.699

so the direction is approximately 16.7 degrees north of west