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- The chirping rate of a cricket, X, in chirps per minute near room temperature, is X = 7.2t – 32 where t is the temperature in °C. Calculate the chirping rates at 20°C and 30°C. (in chirps/min) (Enter your answer to three significant figures.)A typical person has an average heart rate of 69.069.0 beats/min. Calculate the given questions. How many beats does she have in 5.05.0 years? How many beats in 5.005.00 years? And finally, how many beats in 5.0005.000 years? Pay close attention to significant figures in this question.The speed of light is 3 x 108 m/sec Assume: 1.6 km/mile 1.If the earth is close to Mars, we are roughly 50 million miles apart. How many minutes will it take for us to communicate with astronauts on Mars? 2.When we are at opposites in our orbits, we are close to 200 million miles apart. How many minutes will it take for us to communicate with astronauts on Mars?
- A student sets up the following equation to convert a measurement. (The ? stands for a number the student is going to calculate.) Fill in the missing part of this equation. Note: your answer should be in the form of one or more fractions multiplied together. kJ 0.020 x10 mmol "C mol CGiven that an IV is mixed so that each 150. mL of the solution contains 500. mg of the drug lidocaine and the rate of infusion is set at 300. mL/hr. How many minutes will it take for 0.75 g of lidocaine to be administered?Keeping track of units during conversions can get confusing. Therefore, a good strategy is to use dimensional analysis. In dimensional analysis, conversion factors are used to cancel out unwanted units and leave the desired units. Consider the following example: How many football fields could fit on a 1 mile stretch of land? Here are the relevant conversion factors: 1 football field 100 yards 1 mile 5280 ft |3| 1 yard = 3 ft Then 5280 1 yard 1 football field 1 pmile x 100 yards 1 mile 17.6 football fields
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- Dashboard My Home OWLV2 | Online teaching and learning resource from Cengag [References) A student gently drops an object weighing 15.7 g into an open vessel that is full of ethanol, so that a volume of ethanol spills out equal to the volume of the object. The experimenter now finds that the vessel and its contents weigh 10.6 g more than the vessel full of ethanol only. The density of ethanol is 0.789 g/cm°. What is the density of the object? Density = g/cm³ Submit Answer Try Another Version 10 item attempts remainingA student sets up the following equation to convert a measurement. (The ? stands for a number the student is going to calculate.) Fill in the missing part of this equation. Note: your answer should be in the form of one or more fractions multiplied together. (-1.3 x 10² mmol "C kJ mol C 3 0.0 9 X 3Convert 6.4 x 10^-28 j-s/ kg to erg- min /lb. Note that “j” means “ joule” - it is one of the units used for energy and “j-s” means “ joules times seconds” not minus. While solving this problem please follow the same three steps and write down the details of each step.