Answer:
15186 J energy lost due to friction
Explanation:
Given:
- Height of the tallest hill (first) h_1 = 16 m
- Height of the last hill h_2 = 7 m
- Velocity @tallest hill = 0
- Velocity @last hill = 0
Find:
How much energy was lost due to friction can be determined from an energy balance at point on top of tallest hill and on top of last hill:
E_p,1 + E_k,1 = E_p,2 + E_k,2 + E_f
Where, E_k,1 = E_k,2 = 0
E_p,1 - E_p,2 = E_f
E_f = m*g*(h_1 - h_2)
E_f = 172*9.81*(16 - 7)
E_f = 15186 J
To get to know the characteristics of the image formed, you complete the ray diagram.
When the object is place beyond C the image formed is usual smaller than the object.
The image is also inverted.
∴The best statement that describes the image is <span>D.) It will be smaller than the vase and inverted</span>
Answer:
Monitoring water quality is an important part of helping us determine whether or not we are making progress in cleaning up our waterways. It reveals the health and composition of streams, rivers, and lakes at a snapshot in time, as well as over weeks, months, and years. Dirty water could be dangerous to us, and our environment!
Answer:
4.35x10¹⁷s is the age of the universe
Explanation:
The age of the universe is 13.8 billion years.
As we know, 1 billion years = 1x10⁹years
13.8 billion years * (1x10⁹years/ 1 billion years) = 13.8x10⁹ years.
As 1 year = 3.154x10⁷ seconds, 13.8x10⁹ years are:
13.8x10⁹ years * (3.154x10⁷ seconds / 1 year) =
<h3>4.35x10¹⁷s is the age of the universe</h3>