PHYSICS HIGH SCHOOL

Acid mine drainage is: pollution caused when water, wind or ice erodes the overburden forming erosion drainage channels.
dissolved toxic materials wash from mines into nearby lakes and streams.
a buildup of residual acidity in soils destroys large areas of vegetation.
the acidity of metals in mines exceeds level 9 on the pH scale.

Answers

Answer 1
Answer:

Answer:

Acid mine drainage is dissolved toxic materials wash from mines into nearby lakes and streams.

Explanation:

Acid mine drainage is the flow of acidic water with pH typically between 2 and 4, and high concentrations of other dissolved toxic materials from mines into nearby lakes and streams. It mainly occurs during metal sulfide mining, when the metal sulfide ore such as pyrite (FeS2) is exposed to water and oxygen from air to produce soluble iron and sulfuric acid.

Microorganisms, especially acidophile bacteria like Acidithiobacillus ferrooxidans grow by pyrite oxidation, i.e., oxidizing the Fe²⁺ in pyrite to Fe³⁺, which again react with pyrite and water to produce sulfuric acid. Then the acidic water flows into nearby water sources and reduces the pH value of water in those sources. As a result, heavy metals such as copper, lead, mercury, etc in other mineral ores also get dissolved into the water. The action of acidophile bacteria also increases the rate and degree of acid-mine drainage process.

The acid mine drainage causes water pollution and adversely affect the aquatic plants and animals. It also results in the contamination of drinking water, corrosion of infrastructures such as bridges, etc.

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The planet and its moon gravitationally attract each other. Rank the force of attraction between each pair from greatest to least.
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The kinetic energy of a book on a shelf is equal to the work done to lift the book to the shelf. t/f
you toss a bowling ball straight up into the air with a speed of 2.1. how long does it take the bowling ball to reach its highest point?
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What is an important similarity between sound and light?a. Both are transverse waves.
b. Both are longitudinal waves.
c. Both travel with same speed in air.
d. Both can show interference effects.

Answers

d) both can show interference effects

Astronauts in orbit are not truly weightless.

Answers

They are not weightless since there is no gravity there is nothing holding them down causing their weight to decrease in space

Answer:

it is true

Explanation:

Locate the complete verbal phrase and identify its type.A boy named Robert won the high jump contest.
Verbal Phrase:
Type:

Answers

won
adjective

Verb phrases are verbs that may function as a predicate, adjective, or adverb. 

(a) "That he said" is an adjective modifying "word". However, this contains the s ubject"he" and the verb "said". It is a clause and NOT a phrase. Phrases can only have either a verb or a noun.
(b) There's only one verb "was" but it does not come with a complement, object, modifier, or other verb. Hence, it's NOT a verb phrase. 
(c) "Shall be" consists of the modal shall and the be-verb be. This is a perfect example of a verb phrase that functions as a VERB PHRASE. 
(d) "Roared" and "charged" are two verbs referring to different subjects. They do not come with a complement, object, modifier, or another verb. Hence, they're NOT a verb phrase. "As the bull charged" is a clause and not a phrase.

The correct answer is:

Verbal Phrase: named Robert

Type: participial

A train leaves the station at the 0.0m marker traveling with a constant velocity of 45.0 m/s. How manyseconds later will the train pass the 1500.Om marker? What is the velocity of the train in km/h?

Answers

The train will pass the 1500.0m marker 33.33 seconds after leaving the station. Its velocity is 162.0 km/h.

How to evaluate time the train will pass the 1500.0m marker and it's velocity

To find the time it takes for the train to pass the 1500.0m marker, we can use the formula: time = distance / velocity. Plugging in the values,

time = 1500.0m / 45.0 m/s

time = 33.33 seconds.

To convert the velocity from m/s to km/h, we use the conversion factor: 1 m/s = 3.6 km/h. Therefore,

velocity = 45.0 m/s * 3.6 km/h/m/s

velocity = 162.0 km/h.

In summary, the train will pass the 1500.0m marker approximately 33.33 seconds after departing the station, and its velocity will be 162.0 km/h

Read more about velocity here: here:brainly.com/question/80295

#SPJ3

Answer:

119.88 km/h

Explanation:

1500/45=33.3

use a m/s to km/h calculator

put in 33.3 for m/s and you will get 119.88 km/h.

119.88 km/h.

An oscillator makes four vibrations in one second. What is its period and frequency?

Answers

Frequency = no. of oscillations/ time

= 4 / 1
= 4Hz

Time period = 1/ frequency

= 1/ 4

= 0.25 seconds.

Sampling error can be reduced by __________.A. none of the these affect sampling error
B. utilizing simple random samples
C. increasing the sample size
D. decreasing the sample size

Answers

C. increasing the sample size 

More samples can bring your averages closer to the correct answer
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