7. The standard width between rails on North American and most European railroad

Question

7. The standard width between rails on North American and most European railroads is 4 ft 8 in. Calculate this distance in a a. centimeters. b. meters. 8. The heat required to raise the temperature of a large cup of water (for coffee) from room temperature to boiling is approximately 100 k. Express this quantity of heat in kilocalories. Show your calculations 9. An aspirin tablet has a mass of about 325 mg (5 grains). Calculate the total mass of aspirin tablets in a 500-tablet bottle in grams and ounces. a. grams

Explanation / Answer

Solution :-

Q7)part A

4 ft 8 in

a). centimeters

1 ft = 12 inch

So 4 ft * 12 inch / 1 ft = 48 inch

So total width in inch = 48 + 8 = 56 inch

Now lets convert the inch to centimeter

56 inch * 2.54 cm / 1 inch = 142.24 cm

So the answer is 142.24 cm

b) for the part a we get answer in cm

now lets convert cm to meter

142.24 cm * 1 m / 100 cm = 1.4224 m

So it is 1.4224 m

Q8) converting 100 kJ to kilocalorie

1kcal = 4.184 kJ

100 kJ * 1 kcal / 4.184 kJ = 23.9 kcal

So answer is 23.9 kcal

Q9) 1 tablet =325 mg

(500 tablet * 325 mg / 1 tablet )*(1 g / 1000 mg) = 162.5 g

So mass of the 500 g tablet bottle in gram is 162.5 g

Lets convert it ounces

162.5 g * 1 ounce / 28.3495 g = 5.732 ounce

So the mass in ounce = 5.732 ounce

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