Answer:
3pkm per hour
Explanation:
average is 30 km per hour
20 + 30 + 40= 90
90/3= 30
Acceleration = (Speed or velocity) / Time
= 45/9
= 5 m/s²
<span>Rills, gullies, streams, rivers and tributaries are all caused by water erosion. Water erosion is the natural act by which water flow (or wind flow) slowly removes soil, rock, or any material found in the earth's crust. The removed materials are transported to another location, leaving behind changes in the crust.</span>
Answer:
The vibrations from sound waves cause our ears to send signals to our brains to create sound. The speed of sound waves will determine the sound's pitch, or how high or low something sounds. Sound waves are important because they allow us to hear important messages and emergency signals to protect ourselves.
Explanation:
I hope this helps :)
