A sample of an unknown substance has a mass of 89. 5 g. If 345. 2 j of heat are required to heat the substance from 285 k to 305 k, what is the specific heat of the substance?.

Which statements about the two fossil images are correct? 1. cave bears are ancestors of plateosaurus. 2. plateosaurus were present on earth before ostracoderms. 3. ostracoderms were the first to die. 4. plateosaurus died after the ostracoderms. 5. cave bears are the oldest fossils.

What is the leading cause if water scarcity throughout much of the world

In wich of the following phases of the moon are you able to see the most surface area? a)new moon b)waxing crescent c)waxing gibbous d)waning cresent