HELP DUE IN AN HOUR!! said last answer choice was incorrect.

Which of the following is an indicator of good water quality?

Agata [3.3K]

The answer would be: c. High levels of dissolved oxygen

Oxygen is vital for most (aerobic) organism. Fish using oxygen that dissolved in the water so high level of dissolved oxygen will make the fish grow easier. Water with pH of 5 would be an acid water. Acid is corrosive and it can kill some organism that sensitive. High levels of fecal coliform mean the water contaminated with fecal material and must have a high level of bacteria.

6 0

3 years ago

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Which trait would most likely lead a scientist to repeat an experiment and verify the data?

kati45 [8]

Creativity
openness
Diversity
Skepticism

5 0

3 years ago

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The mass of the motorbike and rider is 286 kg. Calculate the acceleration of the motorbike at this moment in time.

Aleks04 [339]

Answer:

$a=4.03\ m/s^2$

Explanation:

Given that,

The mass of the motorbike and rider is 286 kg.

We need to find the acceleration of the motorbike at this moment in time.

Net force acting on the bike is given by :

F = 2000 N - 845 N = 1155 N

Let a be the acceleration of the motorbike. So,

$a=\dfrac{F}{m}\\\\a=\dfrac{1155}{286}\\\\a=4.03\ m/s^2$

So, the acceleration of the motorbike is $4.03\ m/s^2$ .

7 0

3 years ago

During a baseball game, a batter hits a popup to a fielder 84 m away. The acceleration of gravity is 9.8 m/s 2 . If the ball rem

Nezavi [6.7K]

The ball rises up to 30.625 m high.

<h3>What is gravity?</h3>

The force that pulls items toward the centre of a planet or other entity is called gravity. All of the planets are kept in orbit around the sun by gravity.

Given parameters:

Horizontal range of the ball; R = 84 m.

Time of flight of the ball: T = 5 s.

Acceleration due to gravity; g = 9.8 m/s².

We have to find, maximum height obtained by the ball; H = ?

In projectile motion, time of flight is; T = 2usinθ/g

Where, u = initial velocity of the ball and θ = angle of projection.

So, 2usinθ/g = 5

⇒ usinθ = 5g/2 = (5×9.8)/2m/s = 24.5 m/s.

Then maximum height obtained by the ball;

H = u²sin²θ/2g

= 24.5²/(2×9.8) = 30.625 m.

Hence, maximum height obtained by the ball is 30.625 m.

Learn more about gravity here:

brainly.com/question/13860566

#SPJ1

4 0

1 year ago

Explain why open pipes are preferred to closed pipe in the production of music-

tatuchka [14]

Answer:

The frequencies of sounds made by these two types of instruments are different because of the different ways that air will move at a closed or open end of the pipe. Open pipes do not produce superior tone than closed (or stopped) pipes, therefore different types of pipes are used to produce different tonal qualities.

Explanation:

8 0

3 years ago