Answer:
Explanation:
<h3><u>Given Data:</u></h3>
Wavelength = λ = 6.25 × 10⁷ m
Speed of light = c = 2.998 × 10⁸ m/s
<h3><u>Required:</u></h3>
Frequency = f = ?
<h3><u>Formula:</u></h3>
<h3><u>Solution:</u></h3>
Put the givens in the formula.
![\displaystyle f=\frac{2.998 \times 10^8}{6.25 \times 10^7} \\\\f=0.48 \times 10^1\\\\f=4.8 \ Hz\\\\\rule[225]{225}{2}](https://tex.z-dn.net/?f=%5Cdisplaystyle%20f%3D%5Cfrac%7B2.998%20%5Ctimes%2010%5E8%7D%7B6.25%20%5Ctimes%2010%5E7%7D%20%5C%5C%5C%5Cf%3D0.48%20%5Ctimes%2010%5E1%5C%5C%5C%5Cf%3D4.8%20%5C%20Hz%5C%5C%5C%5C%5Crule%5B225%5D%7B225%7D%7B2%7D)
Answer:
science that studies living things
Explanation:
it includes plants and animals so basically anything that has life
Wind can use sand as an abrasive to wear away rock.
Option (d);
<u>EXPLANATION: </u>
- Rocks are broken down into smaller pieces with sand or water flowing over the rocks at a great speed.
- Many solid particles like soil, sand, mud, etc. move down the rocks by downhill or wind blowing in the downward direction and called wind abrasion.
- Sand blown with the help of high speed, sandblast away the rocks.
- Abrasion is a process in which sand is blown in downwards direction with the help of wind and that wears away the rock's surface over time.
- Thus, wind uses sand as an abrasive to wear away a rock.
