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3 years ago

Which energy transformations occur when a candle burns?

2 answers:

5 0

<span>This would be chemical energy that is converted to heat. The heat from the wick melts the wax which gets absorbed in the wick and then gets burnt (which is really oxidation) to produce heat energy.</span>

musickatia [10]3 years ago

3 0

Answer:

Chemical energy into Thermal energy and Light Energy

Explanation:

When candle is burnt then its wax which is a having chemical potential energy in it will burn and convert its chemical potential energy into light energy and thermal energy.

So here the wax will melt down after burning and few of its part will evaporate and convert its energy into thermal energy and light energy both.

So overall if we write energy transformation in this

Chemical potential energy of wax = Light Energy + Thermal energy

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The farthest major planet from the sun is

nikdorinn [45]

The farthest major planet from the sun is Neptune

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4 years ago

A child weighing 200 N is being held back in a swing by a horizontal force of 125 N, as shown in the image. What is the tension

mixer [17]

Answer:

Explanation:

i am not sure but if 200N boy is being held back then the force that's holding him back must be equal to or greater than his weight. if 125N is already exerted then the tension will be:

T=200-125

= 75

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3 years ago

"The toy car is about 3 inches long" is an example of a what observation?

Crazy boy [7]

Answer:

It's a quantitative observation because it includes numerical data.

Explanation:

please mark brainliest if im correct

5 0

3 years ago

A 33.0 g iron rod, initially at 22.7 ∘c, is submerged into an unknown mass of water at 63.3 ∘c, in an insulated container. the f

professor190 [17]

When the iron and the water reach thermal equilibrium, they have same temperature, $T=58.5^{\circ}C$ .
We can consider this as an isolated system, so the heat released by the water is equal to the heat absorbed by the iron.

The hear released by the water is:
$Q_w =m_w C_{sw} \Delta T_w$
where $m_w$ is the water mass, $C_{sw}=4.186 J/(g^{\circ}C)$ is the specific heat of the water, and $\Delta T_w = 63.6^{\circ}-58.5^{\circ}=5.1^{\circ}C$ is the variation of temperature of the water.

Similarly, the heat absorbed by the iron is:
$Q_i = m_i C_{si} \Delta T_i$
where $m_i = 33.0 g$ is the iron mass, $C_{si}=0.444 J/(g^{\circ}C)$ is the iron specific heat, and $\Delta T_i = 58.5^{\circ}-22.7^{\circ}=35.8^{\circ}C$ is the variation of temperature of the iron.

Writing $Q_w=Q_i$ and replacing the numbers, we can solve to find mw, the mass of the water:
$m_w= \frac{m_i C_{si} \Delta T_i}{C_{sw} \Delta T_w} =24.6 g$

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3 years ago

Which are causes of desertification?

rodikova [14]

Deforestation because it gets rid of the nature and soon the land will be empty and dry

7 0

3 years ago

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