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3 years ago

Is castor oil good to reduce wrinkles

1 answer:

6 0

Castor oil contains fatty acids that have moisturizing, skin health-enhancing, and antioxidant properties. These fatty acids may also help minimize wrinkles. Castor oil also has emollient properties known to help improve your skin's texture and healthy appearance.

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The wavelength of a particular color of violet light is 433 nm. The energy of this wavelength of light is kJ/photon. (109 nm = 1

mash [69]

Answer:

4.59 × 10⁻³⁶ kJ/photon

Explanation:

Step 1: Given and required data

Wavelength of the violet light (λ): 433 nm

Planck's constant (h): 6.63 × 10⁻³⁴ J.s

Speed of light (c): 3.00 × 10⁸ m/s

Step 2: Convert "λ" to meters

We will use the conversion factor 1 m = 10⁹ nm.

433 nm × 1 m/10⁹ nm = 4.33 × 10⁷ m

Step 3: Calculate the energy (E) of the photon

We will use the Planck-Einstein's relation.

E = h × c/λ

E = 6.63 × 10⁻³⁴ J.s × (3.00 × 10⁸ m/s)/4.33 × 10⁷ m

E = 4.59 × 10⁻³³ J = 4.59 × 10⁻³⁶ kJ

5 0

3 years ago

Why do you think learning about how atomic theory has evolved is important?

tatuchka [14]

I feel like it is important, because it is always nice to learn about new things and keep your mind open, to expand your knowledge.

6 0

3 years ago

Which statements are true?

schepotkina [342]

Explanation:

Evaporation is defined as a process in which liquid state of water is changing into vapor state.

So, we need to break the bonds of liquid substance in order to convert it into vapor state. And, energy is absorbed for breaking of bonds which means that evaporation is an endothermic process.

Hence, the statement evaporation of water is an exothermic process is false.

When a hydrocarbon reacts with oxygen and leads to the formation of carbon dioxide and water then this type of reaction is known as combustion reaction.

A combustion reaction will always release heat energy. Hence, combustion reaction is exothermic in nature.

When energy is transferred as heat from the surroundings to the system then it means energy is being absorbed by the system. And, absorption of heat is an endothermic process for which $\Delta H$ is positive.

Whereas when energy is transferred from system to the surrounding then it means energy is released by the system which is an exothermic process.

Hence, for an exothermic process value of $\Delta H$ is negative.

Thus, we can conclude that statements which are true are as follows.

A combustion reaction is exothermic.

When energy is transferred as heat from the system to the surroundings, $\Delta H$ is negative.

For an endothermic reaction Deta H is positive.

5 0

3 years ago

The hole in the ozone layer can lead to increases in skin cancer.<br> a. True<br> b. False

Likurg_2 [28]

A. True. The ozone layer is very critical to our health.

6 0

3 years ago

Read 2 more answers

1 mole of nacl(s) has a greater entropy than 1 mole of nacl(aq). true or false g

Svetradugi [14.3K]

It is false that 1 mole of nacl(s) has a greater entropy than 1 mole of nacl (aq).

this is because nacl(aq) is in aqueous state while nacl(s) is in solid state. Nacl(aq) has greater entropy than nacl(s) because in
aqueous state their is increase in entropy. the entropy of the two ions in water has greater entropy than the solid nacl.

3 0

3 years ago