Abalance uses small metal weights of known mass to determine the mass of a substance. where would a balance not function correctly?
a. in a vacuum on earth
b. on the moon's surface
c. on the earth's highest mountain
d. in a zero gravity environment

Madison would like to improve her mood and reduce her risk of stroke. which of there behavior would most her reach this health goal

Explain why hiv is a life-threatening sti.

What link in the chain of transmission is described in the paragraph? sarah has been eating and sleeping poorly. she was just diagnosed with pneumonia. tests showed the illness was caused by streptococcus pneumoniae. in the chain of transmission, sarah is the (blank) , and streptococcus pneumonia is the (blank).