Ask question

Ask question

All categories

xxTIMURxx [149]

3 years ago

5

A 1200 w microwave oven transforms 1.8x10(to the power of 5) J of energy while reheating some food. Calculate how long the food

was in the microwave, in mins!? (Please show steps, thanks)

1 answer:

Fofino [41]3 years ago

5 0

1200 watts = 1200 joules per second

(1.8 x 10⁵ joules) / (1,200 joules/sec) = 150 sec = <em>2.5 minutes

</em>

You might be interested in

Which of these processes are chemical reactions

White raven [17]

Explanation:

In chemical reactions, chemical changes occur.
Atoms are simply rearranged and new bonds are formed.
Chemical reactions are driven by a need for atoms to attain stability in their structure.
In all chemical reactions, a reactant or reactants gives new product i.e new substances are formed.
Most these reactions are not easily reversible.
They are usually accompanied by the release of energy.

Learn more:

Chemical change brainly.com/question/9388643

#learnwithBrainly

5 0

3 years ago

Se aplica una fuerza neta de 25 N a una masa de 10 kg. ¿Cuál es la aceleración dada a la masa?

lys-0071 [83]

Answer:

Se queda

Explanation:

Porque 10 kg es más que 25N

4 0

3 years ago

How much physical activity should an adult have each week?

Mars2501 [29]

d 30 minutes a day , 5 days a week

4 0

3 years ago

Read 2 more answers

Which wavelengths of light drive the highest rates of photosynthesis? Select the two best answers. a. 400-450 nm b. 500-600 nm c

Daniel [21]

Answer: a) 400-450nm and c) 550-700nm

Explanation:

photosynthetic organisms, absorbs light with wavelengths of 430 nanometers (nm) and red light of 662 nm

4 0

3 years ago

How much heat is released upon converting one mole of steam (18.0

Anika [276]

4.65 × 10⁴ Joules of heat is released upon converting one mole of steam to water.

$\texttt{ }$

<h3>Further explanation</h3>

Specific Heat Capacity is the amount of energy needed to raise temperature of 1 kg body for 1°C.

$\large {\boxed{Q = m \times c \times \Delta t} }$

<em>Q = Energy ( Joule )</em>

<em>m = Mass ( kg ) </em>

<em>c = Specific Heat Capacity ( J / kg°C ) </em>

<em>Δt = Change In Temperature ( °C )</em>

Let us now tackle the problem!

$\texttt{ }$

<u>Given:</u>

initial temperature of steam = t = 100.0°C

specific heat capacity of water = c = 4.186 J/gK

mass of steam = m = 18.0 gram

final temperature of water = t' = 25.0°C

specific latent heat of vaporization of water = Lv = 2268 J/g

<u>Asked:</u>

heat released = Q = ?

<u>Solution:</u>

$\boxed {\large {\texttt{steam 100}^oC \overset{[Q_1]}{\rightarrow} \texttt{water 100}^oC \overset{[Q_2]}{\rightarrow} \texttt{water 25}^oC}}$

$Q = Q_1 + Q_2$

$Q = mL_v + mc\Delta t$

$Q = 18.0(2268) + 18.0(4.186)(100-25)$

$Q = 40824 + 5651.1$

$Q = 46475.1 \texttt{ Joules}$

$Q \approx 4.65 \times 10^4 \texttt{ Joules}$

$\texttt{ }$

<h3>Learn more</h3>

Efficiency of Engine : brainly.com/question/5597682
Flow of Heat : brainly.com/question/3010079
Difference Between Temperature and Heat : brainly.com/question/3821712

$\texttt{ }$

<h3>Answer details </h3>

Grade: College

Subject: Physics

Chapter: Thermal Physics

$\texttt{ }$

Keywords: Heat , Temperature , Block , Aluminium , Ice , Cold , Water

4 0

3 years ago

Read 2 more answers