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3 years ago

Yesenia wants to bake cookies in her electric oven. The oven will transform electrical energy into ________ energy

Physics

2 answers:

Nitella [24]3 years ago

7 0

Answer: Heat energy

Explanation:

The oven will transform electric energy into heat energy. This transformation is due to the heating filament present in the oven. This filament get heated up due to the electric current passed through the oven through the aid of electricity (electric energy)

galina1969 [7]3 years ago

6 0

The answer is heat. The oven will transform electrical energy into heat energy. :)

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Bonsoir pouvez vous m'aider svp.<br>Mathématiques

LenaWriter [7]

bonsoir, je peux vous aider avec les maths laissez-moi comprendre merci

4 0

3 years ago

A 3-kW resistance heater in a water heater runs for 3 hours to raise the water temperature to the desired level. Determine the a

Kipish [7]

Answer:

Energy, 9 kWh or 32400 kJ

Explanation:

Given that,

The power of heater, P = 3 kW

It runs for 3 hours to raise the water temperature to the desired level. We need to find the amount of electric energy used. We know that the electrical power of an object is given by total energy delivered per unit time. It is given by :

$P=\dfrac{E}{t}$

$E=P\times t$

$E=3\ kW\times 3\ h$

E = 9 kWh

Since, 1 kWh = 3600 kJ

E = 32400 kJ

So, the amount of electric energy used is 9 kWh or 32400 kJ. Hence, this is the required solution.

4 0

3 years ago

A car advertisement states that a car can accelerate at 2 m/sec. The car starts from rest and accelerates to 70 km/hr. How much

Reptile [31]

Answer:

9.72s

Explanation:

$\pink{\frak{Given}}\begin{cases}\textsf{ A car starts from rest.}\\\textsf{It has an acceleration of 2m/s$^2$.}\\\textsf{ The final velocity of the car is 70km/hr.}\end{cases}$

Here we need to find out the time that the car took to achieve the velocity of 70km/hr after starting from rest . Firstly convert the final velocity in m/s by multiplying it by 5/18 , as ,

$\longrightarrow\sf 70km/hr = 70 \times \dfrac{5}{18} m/s =\bf 19.44\ m/s$

As we know that the rate of change of velocity is known as acceleration , so ;

$\longrightarrow\sf a =\dfrac{v - u}{t}$

Plug in the respective values ,

$\longrightarrow\sf 2m/s^2 = \dfrac{ 19.4 m/s -0m/s}{t} \\$

Simplify ,

$\longrightarrow\sf 2m/s^2 =\dfrac{19.4m/s}{t}$

Cross multiply ,

$\longrightarrow\sf t = \dfrac{19.44m/s}{2m/s^2}$

Simplify

$\longrightarrow\sf \boxed{\bf t = 9.72 s}$

<h3>Hence the required answer is 9.72s.</h3>

7 0

2 years ago

Covert 1000 kg/m3 into 1g/cm3

Lana71 [14]

Answer:

1 g/cm³

Explanation:

1 kg = 1000 g

1 cm = 0.01 of a meter

1 m³ = 100 cm * 100 cm * 100 cm = 1,000,000 cm

1,000 kg / 1 * 1000 g / 1 kg

^ divided by 1,000,000 cm

1,000,000 divided by 1,000,000 = 1 g/cm³

6 0

2 years ago

Energy is transferred as the heat between two objects, one with a temperature of 5 C and the other with a temperature of 20 C. I

Delicious77 [7]

Answer:

Final temperature is located between 5 °C and 20 °C.

Explanation:

The object with high temperature transfers energy to the object with low temperature until thermal equilibrium is reached, that is, when both objects have the same temperature.

$Q_{H} = -Q_{L}$