The specific heat capacity of water is 4.18 J/gºC. A water heater warms 3500 grams of water from a temperature of 78.7
°C to 83.7 °C. Determine the amount of energy in joules)
required.

State one important difference between a physical change and a chemical change?

Scientists often have to deal with numbers that are either very large or very small. for example, the radius of the sun is approximately 696,000 kilometers, while bacterial cells are as small as 1.9 × 10-4 millimeters. express each number in an alternate form.

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