Scientific Notation Convert the following numbers to scientific notation. Be sure to include the correct number of signi

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Scientific Notation Convert the following numbers to scientific notation. Be sure to include the correct number of significant figures Pay attention to rules for trailing zeros in whole numbers vs. trailing zeros in decimal numbers 68,200 93,000,000 82 3.69 0.000085 0.0079540 0.063000 0.00000000510 Convert the following numbers into decimal notation 4.84x104 1.250x10 13x10 621X10 Combining units 1. What is the metric unit for speed? a. If you travel 41 meters every 18 seconds, what is your speed? b. If you travel at a constant speed of 6 , how far can you travel in 9 seconds? 1

2 What two measurements do you need to multiply, divide, add, or subtract to find the area of a surface? 3. What three measurements do you need to multiply, divide, add, or subtract to find the volume of a 3- dimensional object? 4. Density is defined as mass divided by volume. What is the standard metric unit for density? a. I measure the mass of a cube to be 0.68 kg and the volume to be 0.45 m? What is the density of the cube? b. Would this cube float in water? The density of water is 1000 Objects float if they are less dense than water and they sink if they are denser than water c. What is the length of each side of my cube? (Remember that a cube is the same length on cach side) 2

5. Momentum is defined as mass times vclocity. What is the standard metric unit for momentum? If a 410 kg car is traveling at 35, what is its momentum? b. If I toss an apple across the room with a velocity of 14 it will have a momentum of 2.1 kg What is the mass of the apple in grams? 6. Propose some useful SI units for deciding what volume of gas is added to your cars tank per some amount of time? (i.e. how fast does gasoline come out of the pump?) The units for volume of a regular solid (one that we can easily measure the length of each side with a ruler) are often different than the unit for volume for a liquid. What are cach of these units? b. What is the ratio of these two units? (Find a conversion factor to change from one to the other) 3

Unit Conversion Convert 18 mg to kg Convert 0,4 mºto Convert 36 km to min year Convert 65 miles to hour Convert 2000 Calories (the suggested daily caloric intake for most individuals) to Joules. There are 4.184 Joules in one calorie and 1000 calories in one food Calorie (difference is one is capital "C" and other is lower case "e")