The helium in the balloon has a mass of 0.00254 kg. The balloon has a volume of 0.0141 m3. Calculate the density of helium. Choose the correct unit from the box. m3 / kg kg / m3 kg m3

When an object is heated it contracts. a. true b. false

What is the most useful equation for electric power?

Researchers determine that the biodiversity in a woodland region is declining. they identify two major threats to the region's biodiversity, a method to address each threat, and the expected outcome of each method. this information is shown in the table. a) reforestation would not benefit many species because most forest species live on the ground. b) reforestation would take the longest time to be effective because trees take several years to grow. c) biological augmentation would benefit only a few species because is is typically not very effective. d) biological augmentation would take less time to ve effective because it targets the majority of prey species.