How many minutes does it take light from the sun to reach Earth The distance

# How many minutes does it take light from the sun to

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8.How many minutes does it take light from the sun to reach Earth? (The distance from the sun to Earth is 93 million miles; the speed of light is 3.00 × 108m/s)(4 points)300000000 m/s * 1 mile/1609.35 m = 186410.6627 miles/sec => 93000000 miles / 186410.6627 miles/sec = 498.8985 sec * 1 min/60 sec = 8.3 min(Reference: Chang 1.43)9.Normal body temperature is 78.0°F. Calculate this temperature in degrees Celsius and Kelvin. (4 points)C=(F-32)*5/9 => C = (78.0-32) * 5/9 => (46) * 5/9 => 26C K=(C+273.15)*1K/1C => (26+273.15)*1/1 => 299.15K 10.Bromine is a reddish-brown liquid. Calculate its density (in g/mL) if 586 g of the substance occupies 188 mL. (4 points)d=m/V => 586 g/188 mL => 3.117 g/mL(Reference: Chang 1.21)11.Aluminum is a lightweight metal (density = 2.70 g/cm3) used in aircraft construction, high-voltage transmission lines, beverage cans, and foils. What is its density in kg/m3? 12.Calculate the mass of a cube of platinum of edge length 0.040 mm (the density of platinum = 21.4 g/cm3). (5 points)d=m/V => V=l*w*h => 10 mm=1 cm => 0.004 cm* 0.004 cm * 0.004 cm = 0.000000064 cm3=> d/V=m => 21.4 g/cm3 / 6.4*10-8= 334375000 g => 3.34*108g(Reference: Chang 1.57)13.A piece of silver (Ag) metal weighing 194.3 g is placed in a graduated cylinder containing 242.0 mL of water. The volume of water now reads 260.5 mL. From these data calculate the density of silver in units of g/mL. (5 points)260.5 mL – 242.0 mL =18.5 mL (volume of silver) => 194.3 g/18.5 mL = 10.5027027 g/mL => 10.50 g/mL(Reference: Chang 1.61)14.Cholesterol in blood is measured in milligrams of cholesterol per deciliter of blood. If the average adult has 6.0 liters of blood, how many grams of cholesterol would be in the blood of an average adult with a cholesterol reading of 185 mg/dL? Density of blood = 1.020 g/mL. (5 points) 185 mg/dL * 10 dL/L = 1850 mg/L => 1850 mg/L * 6L = 11100 mg => 1 g/1000 mg => 11.1 g3Copyright © 2017 by Thomas Edison State University. All rights reserved. #### You've reached the end of your free preview.

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• Fall '15
• Chemistry, Chemical substance, Chemical compound, Edison State University
• • •  