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rjkz [21]
3 years ago
15

Using your knowledge on personal care products, how does sunscreen

Physics
1 answer:
cricket20 [7]3 years ago
6 0

Answer:

Ultraviolet rays from sun are very harmful from skin and can cause sunburn and skin diseases especially ultraviolet B rays.<em> A sunscreen  lotion act as a protection barrier on the skin that restrict the direct contact of UV rays with skin and filter the harmful rays to enter the skin. </em>

Radiotherapy is a medical therapy use to treat cancer. <em>Radiotherapy commonly uses x-rays and gamma rays because they are high-energy particles or waves that kills or destroys the cancer cells.</em>

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Before you conduct your experiment, you need to form a hypothesis. A hypothesis is a prediction of what you think will happen in
Stolb23 [73]

Example: A apple rotting.

If I put my apple in a fridge, then it would not rot as fast because it is in a cooled area. (example)

Hope it helps! Brainiest Answer would be amazing!

5 0
4 years ago
In the light reactions, electrons from _______ replenish chlorophyll molecules that have given up electrons.​
mel-nik [20]

Answer: water

 The light reactions of noncyclic photophosphorylation takes place in the chloroplast. The light energy is converted to chemical energy to produce both ATP and NADPH, which act as energy-transfer molecules in the light-independent reactions of the Calvin cycle. The addition of phosphate due to synthesizing of ATP by cells results to photophosphorylation.

Moreover, <span>the electrons from water replenish chlorophyll molecules that have given up electrons by photolysis. The two electrons from the water molecule are kept in photosystem II, while the 2H+ and 1/2O2 are left out for further use.</span>

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5 0
3 years ago
A skateboard has a mas of 450g if it travels at 7m/s what is te momentum
Elza [17]

Answer:

Momentum (P)= 3.15Kg.m/s

Explanation:

Because momentum by definition is the product of mass and velocity, therefore, it's calculated by the formula;

P=mv,,,

where 'P' Is the momentum

'm' is mass in Kilograms, note that mass should be in Kilograms, therefore the 450grams should be converted to kilograms by dividing it with a 1000, i.e (450g×1kg/1000g)= 0.45kg, and now you can substitute in the formula because you have everything you need to find momentum in the right si units.

so P=mv

P=0.45Kg×7m/s

P=3.15Kg.m/s

7 0
2 years ago
George observed a difference in measurements for the same item at different altitudes due to variation in gravity.
AURORKA [14]
George used the spring scale. For example: Using a spring scale on an elevator. As you go either up a floor or down a floor the gravity will change the outcome of the scale's measurements.
8 0
3 years ago
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Why the hell not 86 points
trapecia [35]

Answer:

what I dont understand

6 0
3 years ago
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