Filtering of light is a process of selectively transmitting light of different wavelengths. The devices that are used to carry out this process are called optical filters for example, a plabe class or plastic devices. The answer hence to this problem is A.

**Answer: Work can be calculated with the equation: Work = Force × Distance. The SI unit for work is the joule (J), or Newton • meter (N • m). One joule equals the amount of work that is done when 1 N of force moves an object over a distance of 1 m.**

**Explanation:**

**Answer:**

**1.** <u>F = ma</u> <em>F = 0.2kg * 20m/s² = 4Kg * m/s² =</em> **4N**

**2.** <u>F = ma</u> <em>F - 18Kg * 3m/s² = 54Kg * m/s² =</em> **54N**

**3.** <u>F = ma</u> <em>F = 0.025Kg * 5m/s² =</em> **0.125N**

**4.** <u>F = ma</u> <em>F = 50Kg * 4m/s² =</em> **200N**

**5.** <u>F = ma</u> <em>F = 70Kg * 4m/s² =</em> **280N**

**6.** <u>F = ma</u> <em>F = 9Kg * 9.8m/s² =</em> **88.2N**

**Explanation:**

Hope this helps ! **^^**

B. Venus hope this helps have a great day