Find the mass of a sample of water if its temperature dropped 24. 8°C when it lost 870 J of heat. Hint. Which formula are you going to use? See

interactive PPT. Don't forget the unit. Show your work.

How much heat is required to warm a 135g cup of water from 15 °C to

35°C? Hint: the water is in a cup so what state of matter and specific heat?

Show your work.

the population of unionid mussels in the hudson river decreased after zebra mussels were introduced. zebra mussels, a nonnative species, competed with the unionid mussels for food. the zebra mussels were able to outcompete the unionid mussels, allowing the zebra mussel population to increase dramatically over six years. the unionid mussel population decreased due to a lack of food.

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