12.Which of the following best describes the velocity of an object? A 30 m/s
B 30 m east
C30 m/s east
D 30 m/s2

Suppose a lab group reports a ppercent yield of sand of 105. is it really possible to collect more sand than was originally represented? what is the possible explanation for the extra product?

Helium decays to form lithium. which equation correctly describes this decay?

Use the measurements in the table to determine which unidentified metal has the highest density. metal volume mass a 10.5 cm3 122 g b 14.2 cm3 132 g c 16.1 cm3 115 g d 12.7 cm3 126 g