Units, scientific notation.ppt

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Units, scientific notation.ppt Ch. 1 slides Units, scientific notation.ppt

Scientific notation 1,234 0.000576 3.4 x 10-3 We often use scientific notation to describe quantities in physics, especially for very large or very small numbers. Express the following numbers in scientific notation or convert from scientific notation to a standard number. Do not use a calculator to help. 1,234 0.000576 3.4 x 10-3 Simplify the following, and keep in scientific notation (no calculator!): 4× 10 −9 ∗6× 10 −5 3× 10 −6

Units Some of the primary units used in this course are for the following quantities: time seconds (s) distance meters (m) mass kilograms (kg) Convert the following quantities into the standard units 120 ms 50 km 12 mg 100 km/hr

Units to help solve problems 2 groups of students are working to clean a beach. It takes each group 5 minutes to clean up 200 m of a beach. How long does it take to clean up 2 km of beach? Use rates and units conversion to solve the problem.

Electric car Elon Musk of Tesla said that the Model S in “Ludicrous Speed” mode can go from 0 to 60 mph in 2.8 seconds. Use units analysis, knowing that velocity is m/s and acceleration is m/s2, to find the acceleration of the Tesla. (You can also use a conversion of 1.6 km = 1 mi.)

Vectors Consider the following two vectors: vectors.ppt

Vector subtraction   1) 2) 3) 4)                 vectors.ppt