Answer:
The horizontal speed is approximately 29 m/s.
Explanation:
Given that; range = 80 meters, height = 37 meters.
The horizontal speed can be determined by:
R = U
Where R is the range, U is the velocity of the object, H is the height and g is the acceleration due to gravity (9.8 m/).
So that:
80 = U
= U
= U
80 = 2.747912U
⇒ U =
= 29.1130
U ≅ 29 m/s
The horizontal speed is approximately 29 m/s.
I believe the photosphere which is the bright surface of the sun that we see
Answer:
1 W
Explanation:
<em>Power is the ratio of the total work done by the body to the time it will takes to do the work.</em>
<h3><em>Therefore</em><em> </em><em>Power </em><em>=</em><em> </em><em>total</em><em> </em><em>work</em><em> </em><em>done</em><em> </em><em>÷</em><em> </em><em>time</em></h3>
<em>T</em><em>otal</em><em> </em><em>Work</em><em> </em><em>done</em><em> </em><em>=</em><em> </em><em>Potential</em><em> </em><em>energy</em><em> (</em><em>P.E)</em><em> </em><em> </em><em>=</em><em> </em><em>mgh</em>
<em>T</em><em>otal</em><em> </em><em>work</em><em> </em><em>done</em><em> </em><em>=</em><em> </em><em>mgh</em>
<em>Total work done = </em><em> </em><em>1</em><em>k</em><em>g</em><em> </em><em>×</em><em> </em><em>1</em><em>0</em><em>m</em><em>/</em><em>s²</em><em> </em><em>×</em><em> </em><em>1</em><em>m</em>
<em>Total work done = </em><em>1</em><em>0</em><em> </em><em>J</em>
<em>Therefore</em><em> </em><em>Total</em><em> </em><em>Work</em><em> done</em><em> </em><em>is </em><em>1</em><em>0</em><em>J</em><em>.</em>
<em>And</em><em> then</em><em> </em><em>time</em><em> </em><em>is</em><em> </em><em>1</em><em>0</em><em> </em><em>s.</em>
<em> </em><em>Power</em><em> </em><em>=</em><em> </em><em>Total</em><em> Work</em><em> </em><em>done</em><em> </em><em>divided</em><em> </em><em>by </em><em>time</em>
<em>Power </em><em>=</em><em> </em><em>1</em><em>0</em><em> </em><em>J</em><em>÷</em><em> </em><em>1</em><em>0</em><em> </em><em>s </em><em>=</em><em> </em><em>1</em><em> </em><em>W</em>
<h3><em> </em><em>Therefore</em><em> </em><em>Power</em><em> </em><em>is </em><em>1</em><em>W</em></h3>
The speed after 21 s is 18.9 m/s and the total time required for the train to reach a speed of 34 m/s is 14.4 s
<h3>
What is Speed ?</h3>
Speed is a distance travelled by a body per time taken. It is a scalar quantity and it is measured in m/s
Given that at Initially stationary, a train has a constant acceleration of 0.9 m/s2.
(a) What is its speed after 21 s?
- Acceleration a = 0.9 m/s²
Using v = u + at
Substitute all the parameters into the equation
v = 0 + 0.9 x 21
v = 18.9 m/s
(b) What is the total time required for the train to reach a speed of 34 m/s?
Let first calculate for total distance by using
v² = u² + 2as
34² = 18.9² + 2 × 0.9 × S
1156 = 357.21 + 1.8S
1.8S = 1156 - 357.21
1.8S = 798.79
S = 798.79 / 1.8
S = 443.8 m/s
v = u + at
34 = 21 + 0.9t
0.9t = 34 - 21
0.9t = 13
t = 13/0.9
t = 14.44s
Therefore, its speed after 21 s is 18.9 m/s and the total time required for the train to reach a speed of 34 m/s is 14.4 s
Learn more about Speed here: brainly.com/question/24739297
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Answer: Streptococcus.
Explanation:
The Bacteria and Archaea domains are prokaryotes, they contain no nuclues or organelles, only a circular chromosome. They cannot form multicells organisms. Archaea can be found in extreme evironments, such as hot springs and deep sea vents.