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Korvikt [17]
3 years ago
14

Https://brainly.com/question/22600061 Don’t ask too much science

Physics
1 answer:
N76 [4]3 years ago
8 0
Step by step explanation
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A pail of water is rotated in a vertical circle of radius r = 1.6 m . The acceleration of gravity is 9.8 m/s 2 . r v What is the
Snowcat [4.5K]

Answer:3.95 m/s

Explanation:

Given

radius of circle r=1.6 m

Water will not spill if the centripetal acceleration is greater than acceleration due to gravity

i.e. a_c\geq g

a_c=\frac{v^2}{r}

\frac{v^2}{r}\geq g

v_{min}=\sqrt{gr}

v_{min}=\sqrt{9.8\times 1.6}

v_{min}=\sqrt{15.68}

v_{min}=3.95 m/s

8 0
4 years ago
Which of the following statements is true about photosynthesis and cellular respiration A ,both process uses oxygen as a reactan
WINSTONCH [101]
Id say both. all organisms perform cellular respiration, and plants perform photosynthesis, as well as cellular respiration.
7 0
3 years ago
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There are competitions in which pilots fly small planes low over the ground and drop weights, trying to hit a target. A pilot fl
sattari [20]

Answer:

2.0 s, 200 m

Explanation:

Time to hit the ground depends only on height.  Since the plane is at the same height, the weight lands at the same time as before, 2.0 s.

Since the plane is going twice as fast, the weight will travel twice as far (ignoring air resistance).  So it will travel a horizontal distance of 200 m.

5 0
4 years ago
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What is the efficiency of an engine that does 80 j of work and exhausts 320 j of heat while taking in 400 j of heat ?
Luden [163]

Answer:

b. 20%

Explanation:

Efficiency of an engine is a ratio in percentage of the work done to the energy intake of the engine.

η=(Q₁-Q₂)/Q₁×100%

η is efficiency, Q₁ is the energy intake, Q₂ is energy wasted.

The information provided is:

Energy intake = 400 J

Work done = 80 J = (400-320) =Q₁-Q₂

Energy wasted =320 J

η= 80/400×100%

=20%

6 0
3 years ago
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Which of the following must be true for “P if and only if Q” to be true?
erastovalidia [21]
Explain or message me what your trying to ask!

6 0
4 years ago
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