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EleoNora [17]
3 years ago
6

A lightweight material is being tested for effectiveness in blocking ultraviolet (UV) rays from the sun that cause skin to burn

and possibly develop skin cancer. Which method would be most helpful for testing this material?
Biology
2 answers:
Tom [10]3 years ago
7 0

The National Institutes of Health found it effective in reducing pain and other symptoms, but it is not clear how it works.
evablogger [386]3 years ago
3 0

Answer:

Test the material in controlled natural settings by using natural UV light, and measure the UV light that passes through.

Explanation:

The most useful method to test this material would be through a scientific experiment, where the researchers could evaluate the variables of this material in a safe and controlled way and could raise hypotheses and solutions. One way to do this would be, through an experiment, to test the material in controlled natural environments using natural UV light and by measuring the passing UV light, so that researchers would be able to evaluate their object of research and draw results on the light they were experiencing.

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Calculate the weight of an object of 30 kg on Earth. 2. Calculate the weight of an object of 30000 g on Earth. 3. Calculate the
Dima020 [189]

Answer:

1. 294N

2. 294N

3. 19.6N

4. 19.6N

5. 4.9N

6. 4.9N

7. 80N

8. 185N

Explanation:

The weight of an object is the force that gravity is having over it, and we measure it in <u>Neutowns (N), which equals Kg x m/s².</u>

To find the weight of an object, we use the formula F= m x g.

F stands for force, m for the object's mass, and g for gravity, which is the force that attracts objects to Earth, and we measure it by the acceleration that an object has during free falling.

<u>The Earth's gravity is 9.8 m/s²</u>

1. We use the formula F=m x g

F= 30kg x 9.8 m/s²

F= 294 N

2. We have to convert the 30000g into kg to use the formula

30000÷1000= 30kg

30000g equals to 30Kg, so the object's mass (m) is 30Kg.

F= m X g

F= 30kg X 9.8 m/s²

F= 294 N

3. F= m X g

F= 2kg X 9.8 m/s²

F= 19.6 N

4.We have to convert the 2000g into Kg.

2000÷1000= 2Kg

The object's mass (m) is 2Kg.

F= m X g

F= 2kg X 9.8 m/s²

F= 19.6 N

5. F= m X g

F= 0.5 kg X 9.8 m/s²

F= 4.9 N

6.We have to convert 500g to Kg.

500g÷1000=0.5Kg

The object's mass (m) is 0.5 kg

F= m X g

F= 0.5 Kg X 9.8 m/s²

F= 4.9 N

7. The gravity on the moon is different from the one on Earth. In the formula, instead of 9.8 m/s² for the gravity (g), we use 1.6 m/s².

F= m X g

F= 50Kg X 1.6m/s²

F= 80N

8. The gravity (g) on Mars is 3.7 m/s², so we have to use it in the formula where it says g to find the object's weight on Mars

F= 50Kg X 3.7m/s²

F= 185 N

3 0
3 years ago
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