When you drink cold water, your body must expend metabolic energyin order to maintain normal body temperature (37°c) by warmingup the water in your stomach. could drinking ice water, then, substitute for exercise as a way to "burn calories? " suppose youexpend 520 kilocalories during a brisk hour-long walk. how manyliters of ice water (0°c) would you have to drink in order touse up 520 kilocalories of metabolic energy? for comparison, thestomach can hold about 1 liter.

14 L

Explanation:

The ice water will have to be warmed up to 37 oC  

Quantity of heat gain the ice water = mcΔT

where m is the mass of water, c is the specific heat capacity of water

heat gain = heat loss

heat expected the body to lose = 520kcal = 520 × 4184 J ( 1 kcal is 4184 J)

520 × 4184 = 4200 × m  × 37

m = (520 × 4184) / ( 4200 × 37) where specific heat capacity of water is 4200J/KG.K

but density = m/V where V is volume in m³

m = ρ×V

replace m with the above formula

ρV = (520 × 4184) / ( 4200 × 37) and density of water is 1000kg/m³

V = (520 × 4184) / (4200 × 37 × 1000) = 0.014 m³ = 0.014 × 1000 ( 1m³ = 1000L) = 14 L

exercise will be better as it is not quite possible to drink this (14 L) volume of ice cold water.

a solenoid is created by wrapping a l = 90 m long wire around a hollow tube of diameter d = 4.5 cm.   the wire diameter is d = 0.9 mm.   the solenoid wire is then connected to a power supply so that a current of i = 9 a flows through the wire.

randomized variablesl = 90 m

d = 4.5 cm

d = 0.9 mm

i = 9 a                                          

write an expression for the number of turns, n, in the solenoid. you do not need to take into account the diameter of the wire in this calculation.

calculate the number of turns, n, in the solenoid.

write an expression for the length of the solenoid (l2) in terms of the diameter of the hollow tube d.

calculate the length of the solenoid (l2)   in meters.

calculate the magnitude of the magnetic field at the center of the solenoid in teslas.

explanation:

b mirrors submit a iisner? e. for which optical devices does d sometimes have a positive value? o a a and b o b. a and c o c. b and d 0 d. b and cb