Chapter 1, Problem 1.41E

The nutritional calorie (Calorie) is equivalent to 1 kcal. One pound of body fat is equivalent to about 4.1 x 103 Calories.If a runner expends 1850 kJ/h, how long (h) does she have to run to work off 6.05 lb of body fat? Enter your answer in decimal format with one decimal place.   I'm not really sure how to start off this problem...

1)Calculate the density of medication in a cube with sides 2cm respectively that is filled with 4g of thick liquid medicine. 2) use calculations to show how you will convert this medication from g/cm3 to kg/m3

5) How many minutes is required for sunlight to travel from the Sun to Mars? (Assume the Sun is 1.14 x 10^8 km from Mars and that sunlight travels at 2.99 x 10^5 km/s.)(a) 0.00437 minutes (b) 0.157 minutes(c) 6.35 minutes (d) 381 minutes(e) 22,900 minutes Step by step use the conversion factors with starting point and put lines in between the numbers and cancel the units      6) Platinum is one of the most dense elements (d = 21.5 g/cm^3). What is the volume of a 10.0 g sample of the metal?(a) 0.465 cm^3(b) 2.15 cm^3(c) 21.5 cm^3(d) 215 cm^3(e) 465 cm^3 Step by step, use the conversion factors with starting point and put lines in between the numbers and cancel the units    7) A rare metal alloy is a superconductor at 77 K. What is the temperature in °C ?(a) -350°C (b) -196°C(c) -77°C (d) 196°C(e) 350°C Step by step use the conversion factors with starting point and put lines in between the numbers and cancel the units  8) The average distance from the Earth to the Sun is 1.50 x 10^8km.…