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Burka [1]
2 years ago
14

9. How much energy does a 100 W light bulb use in half an hour? If the light bulb converts

Physics
1 answer:
yulyashka [42]2 years ago
6 0

The energy used by the light bulb in half an hour is 180000 J and the amount of thermal energy generated is 158400 J.

What is Energy?

Energy is the ability or the capacity to do work.

To calculate the energy of the light bulb we use the formula below

Formula:

  • E = Pt.......... Equation 1

Where:

  • E = Energy used by the bulb in a half-hour
  • P = Power of the bulb
  • t = Time

Given:

  • P = 100 W
  • t = 1/2 hour = 30 minutes = (30×60) = 1800 seconds

Substitute these values into equation 1

  • E = (100×1800)
  • E = 180000 J

  • If the light converts 12% of electric energy to light energy, then  88% of the energy is used to generate thermal energy

Therefore,

  • Thermal energy = (180000×88/100) = 158400 J

Hence, the energy used by the light bulb in half an hour is 180000 J and the amount of thermal energy generated is 158400 J.

Learn more about energy here: brainly.com/question/21927255

#SPJ1

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Quick I'll Mark it Brainliest Which of the following statements is true?
zzz [600]

Answer:

A, B and C

Explanation:

The A, B and C look most probable. Heat energy flared to atmosphere might not be recovered. It could end up heating up the atmosphere.

8 0
3 years ago
Imagine you are mpho:how can you help your friend (phenyo) not to be influenced by media? you really feel she needs some help be
LUCKY_DIMON [66]

One of the ways to help someone not to be influenced by media is:

  • Encourage independent thinking.
  • Let her know that she should make sure the information she is consuming is free from bias and is factual.

<h3>What is Media Influence?</h3>

This refers to the effects and reactions which the mass media has on the people who listen to them by shaping their views and by controlling the narrative.

With this in mind, we can note that if a person is overtly influenced by the media, then such a person lacks independent thinking and becomes emotional by what he watches on the television or reads from an online source.

This can be changed through the encouragement of independent thinking, and the need to check for factual information from the media news and also to focus more on studies.

Read more about media here:
brainly.com/question/26152499

6 0
2 years ago
Solve the last question
shusha [124]

The equation of the last question which is 3CO2 + 4H2O has a total of 21 atoms with the following number of atoms of each element:

C= 3

C= 3H = 8

C= 3H = 8O = 10.

<h3>What is a chemical formula?</h3>

A chemical formula is defined as the expression that is used to show the chemical symbol of and element in a chemical compound and the number of atoms of those elements.

There are three main type of formula that include the following:

  • Empirical formula : This is the type of chemical formula that shows the simplest whole-number ratio of atoms in a compound.

  • Molecular formula: This is the type of chemical formula that shows the number of each type of atom in a molecule.

  • Structural formula: This is the type of chemical formula that shows how this atoms of each element are bonded together.

The given chemical formula above is a molecular formula that contains the following number of atoms per elements:

C= 3

C= 3H = 8

C= 3H = 8O = 10. Which is a total of 21 ( green)

Learn more about chemical formula here:

brainly.com/question/26388921

#SPJ1

6 0
1 year ago
Which of the following is not part of the kinetic molecular theory?
Zarrin [17]
The option which is not part of the kinetic molecular theory is that B. there is very little empty space in a gas.
As a matter of fact, gas particles are very tiny and they exist in mostly empty spaces.
4 0
3 years ago
5 aplicaciones de la fuerza en tu vida cotidiana
Andrews [41]

Answer:

La fuerza es la causa que provoca cualquier cambio en el movimiento o la geometría de los cuerpos. Un cuerpo puede aceptar muchas fuerzas al mismo tiempo, cuyo resultado será en cada punto una fuerza recomendada y un par recomendado. Cuando estas fuerzas se neutralizan entre sí, se dice que el cuerpo está en un estado de equilibrio.

En lo que respecta a los cuerpos libres, la fuerza es generalmente la causa de un cambio en su estado cinético, es decir, que los acelera o ralentiza. Esto también se aplica a su rotación, que puede acelerarse o desacelerarse. Para los cuerpos que no son libres de moverse en todas las formas, es decir, aquellos que están suspendidos en algún lugar y solo pueden moverse alrededor de un punto o eje o en una trayectoria predeterminada, así como aquellos que aplican fuerzas de fricción o reacciones generales de apoyo, nosotros reducir las fuerzas en puntos característicos. En el caso de los cuerpos no libres, la fuerza es la causa que provoca su movimiento o movilidad en relación con sus puntos de apoyo o conexión, o la que provoca su intenso estado, presión o deformación. La inercia de un cuerpo libre también permite que el cuerpo se someta a una tensión, presión o deformación intensas cuando se le aplican las fuerzas correspondientes.

4 0
3 years ago
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