If an electric heater is rated at 1000, W,the | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(B) The mass of $1\, L$ of water is $m = 1\, kg = 1000\, g$.The specific heat capacity of water is $s = 4200\, J/(kg\cdot ^oC)$.The change in temperat

Vedclass · Accepted Answer

$2\, min\, 48\, sec$

Vedclass · Answer

(B) The mass of $1\, L$ of water is $m = 1\, kg = 1000\, g$.The specific heat capacity of water is $s = 4200\, J/(kg\cdot ^oC)$.The change in temperature is $\Delta 	heta = 60\, ^oC - 20\, ^oC = 40\, ^oC$.The heat energy required is $Q = m s \Delta 	heta$.$Q = 1\, kg 	imes 4200\, J/(kg\cdot ^oC) 	imes 40\, ^oC = 168000\, J$.The power of the heater is $P = 1000\, W$.The time required is $t = Q / P$.$t = 168000\, J / 1000\, W = 168\, s$.Converting $168\, s$ into minutes and seconds: $168\, s = 2\, min\, 48\, s$.

If an electric heater is rated at $1000\, W$,then the time required to heat one litre of water from $20\, ^oC$ to $60\, ^oC$ is

Similar Questions

Which component of a lichen is heterotrophic?

In the expansion of $(1+x)^n$,the coefficients of the $p^{th}$ and $(p+1)^{th}$ terms are respectively $p$ and $q$. Then $p+q$ is equal to:

$4 \ g$ of an ideal gas occupies $5.6035 \ L$ of volume at $546 \ K$ and $2 \ atm$ pressure. What is its molecular weight?

Which of the following is the correct order of basic strength?

Vascular tissues in flowering plants develop from

Vedclass Test Series

Exam Paper Generator

Online Exam Module