An iron boiler of mass 230 kg contains 830 kg of water at 18c.
a heater supplies energy at the rate of 52,000 kj/h. how longdoes
it take for the water a) to reach the boiling point, and b) toall
have changed to steam?

The total time is 41.38 hours.

Explanation:

Given that,

Mass 230 kg

Mass of water = 830 kg

Temperature = 18 C

Rate of energy supplied = 52000 Kj/h

Let the boiling temperature of the water be 100°C

(a). We need to calculate the energy

So from the principle of calorimeter

Put the value into the formula

We need to calculate the time

Using formula of energy

Put the value into the formula

(b). There is no change in temperature.

So the additional heat required to change the water into steam is

We need to calculate the energy

Using formula of energy

We need to calculate the additional time

Using formula of additional time

Put the value into the formula

We need to calculate the total time

Using formula of time

Put the value into the formula

Hence, The total time is 41.38 hours.

the expression 15n + 2(3p) represents the amount isaiah spent buying gasoline and snacks, where n represents the price of each gallon of gasoline and p represents the cost of each snack that he bought. which statement is true about the amount isaiah spent?

it may be wrong but i think its a