Question

After a hot shower and dishwashing, there is "no hot water" left in the 50 -gal $(185-\mathrm{L})$ water heater. This suggests that the tank has emptied and refilled with water at roughly $10^{\circ} \mathrm{C}$ ( $a )$ How much energy does it take to reheat the water to $50^{\circ} \mathrm{C} ?(b)$ How long would it take if the heater output is 9500 $\mathrm{W} ?$

Name: After a hot shower and dishwashing, there is "no hot water" left in the 50 -gal (185-L) water heater. This suggests that the tank has emptied and refilled with water at roughly 10^∘C ( a ) How much energy does it take to reheat the water to 50^∘C ?(b) How long would it take if the heater output is 9500 W ?
Uploaded: 2022-02-23T01:54:37-08:00
Duration: 48 s
Channel: Penny Riley
Description: After a hot shower and dishwashing, there is "no hot water" left in the 50 -gal (185-L) water heater. This suggests that the tank has emptied and refilled with water at roughly 10^∘C ( a ) How much energy does it take to reheat the water to 50^∘C ?(b) How long would it take if the heater output is 9500 W ?

          After a hot shower and dishwashing, there is "no hot water" left in the 50 -gal $(185-\mathrm{L})$ water heater. This suggests that the tank has emptied and refilled with water at roughly $10^{\circ} \mathrm{C}$ ( $a )$ How much energy does it take to reheat the water to $50^{\circ} \mathrm{C} ?(b)$ How long would it take if the heater output is 9500 $\mathrm{W} ?$

Added by Chris B.

University Physics with Modern Physics

Hugh D. Young 14th Edition

Instant Answer

Solved by Expert Penny Riley

02/23/2022

Step 1

The density of water is approximately 1 kg/L, so the mass of 185 L of water is 185 kg. The specific heat capacity of water is approximately 4.18 kJ/kg°C. The change in temperature is the final temperature minus the initial temperature, which is 50°C - 10°C = Show more…

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After a hot shower and dishwashing, there is "no hot water" left in the 50 -gal $(185-\mathrm{L})$ water heater. This suggests that the tank has emptied and refilled with water at roughly $10^{\circ} \mathrm{C}$ ( $a )$ How much energy does it take to reheat the water to $50^{\circ} \mathrm{C} ?(b)$ How long would it take if the heater output is 9500 $\mathrm{W} ?$