1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Lostsunrise [7]
3 years ago
14

A teacher gave the lab group shown below an “unsafe practice” warning. What is most likely the basis for the teacher’s warning?

None of the students are dressed in appropriate laboratory attire. Two of the students have not tied back their long, loose hair. The lab group has not labeled all the flasks that contain liquid. The opening of the flask is pointed in an unsafe direction.
Biology
2 answers:
katen-ka-za [31]3 years ago
5 0

Answer:

It is "The opening of flask is pointed in an unsafe direction"

Explanation:

The students were there in the lab to perform practical without obeying the safety rules. The most  reasonable basis for teacher's warning here, in this case, is the flask which is pointed in an unsafe  direction. It is not specified whether the flask is containing any chemical or not but even if it is empty, it  might just fall and break and create injury to anyone present in the lab because, the students are also not  wearing proper laboratory wear in accordance to the safety rules which include lab coats, gloves,  eyewear, etc. Also, some Students have not tied their hair and more importantly the flasks carrying  liquids are not labeled. All of these things might end up in a critical situation for which the teacher warned  students about it all.

aksik [14]3 years ago
3 0

As stated, the students were there in the lab for performing practical without following the safety rules. The most likely basis for teacher's warning here in this case is the flask which is pointed in an unsafe direction. It is not mentioned whether the flask is containing any chemical or not but even if it is empty, it might just fall and break and cause injury to anyone present in the lab because the students are also not wearing proper laboratory wear in accordance to the the safety rules which include lab coats, gloves, eye wear, etc. Also, some students have not tied their hair and more importantly the flasks containing liquids are not labelled. All of these things might end up in a dangerous situation for which the teacher warned students about it all.

You might be interested in
A student notes that an individual has attached earlobes, a recessive trait in humans. A cell is taken from this individual, and
Sliva [168]
I think i did this before and i think i b and i think it was right if not im sorry 
3 0
3 years ago
Which is an example of a plant with true roots? <br> A) algae B) ferns C) liverworts D) moss
fredd [130]

Answer: B) ferns

Algae, liverworts and moss are examples of plants with no real stems, leaves or roots and are also known as nonvascular plants. Plants with true roots are known as vascular plants. Vascular plants have real roots, stems and leaves and contain vascular tissues. 

5 0
3 years ago
Bob, a nutritionist who works for the university medical center, has been asked to prepare special diets for two patients, susan
abruzzese [7]

Answer and Explanation:

Possibly, you forgot to attach the table with the contents of each food. Therefore, I calculated the task with similar values.

1. <em>Assume you have Food A, B, and C. Each has certain amount of Calcium, Iron, and Vit C. </em>

<em>             </em>Let's designate: Calcium <em>→ X oz , Iron → Y oz, vit C → Z oz</em>

2. <em>Assume you have following amount of</em><em> Calcium</em><em> in each food: </em>

  • Food A = 30 mg/oz
  • Food B = 25 mg/oz
  • Food C = 20 mg/oz

3. <em>Assume you have following amount of</em><em> Iron </em><em>in each food: </em>

  • Food A = 1 mg/oz
  • Food B = 1 mg/oz
  • Food C = 2 mg/oz

4. <em>Assume you have following amount of</em><em> vit C </em><em>in each food: </em>

  • Food A = 2 mg/oz
  • Food B = 5 mg/oz
  • Food C = 4 mg/oz

<u>Calculations:</u>

→ You have 3 different food and each has Calcium in it. You need exactly 320mg of Calcium per day. Therefore, each food would comprise certain proportion of daily Calcium intake. We can come up with equation: 30X+25Y+20Z = 390 mg

  • Similarly, for iron and vitamin C, the next equations could be used:

        X+Y+2Z=17 - Iron

        2X+5Y+4Z=42 - Vit C

→ Now you have a system of equations:

30X+25Y+20Z = 390 <em>(1) </em>

X+Y+2Z=17 <em>(2)</em>

2X+5Y+4Z=42 <em>(3)</em>

→ Look for similarities! <em>(1) and (3) </em>seem to be similar. We can multiply the <em>(3) </em>by -5 to obtain: -10X-25Y-20Z=-210. We add the <em>(1)</em> and modified <em>(3)</em> equations.

30X+25Y+20Z = 390

-10X-25Y-20Z=-210

__________________

20X+0+0=180

20X=180

<em><u>→ X=9 (oz of Calcium)</u></em>

<em><u></u></em>

→ Now, we can put<em> x=9 </em>into equations above to ease our job:

270+25Y+20Z=390 → 25Y+20Z=390-270=120

9+Y+Z=17 → Y+2Z=17-9=8

18+5Y+4Z=42 → 5Y+4Z=42-18=24

→ Similarly, we can use Eq-s <em>(2) and (3). </em>We can multiply the <em>(2) </em>by -5 to obtain: -5Y-10Z=-40. We add the <em>(3)</em> and modified <em>(2)</em> equations.

-5Y-10Z=-40

5Y+4Z=24

__________________

-6Z=-24

Z=4

<em><u>→ Z=4 (oz of vit C)</u></em>

<em><u></u></em>

→ Now, we can take X+Y+Z=17 <em>(2) </em>and just put in known values(<em>X=9 and Z=4</em>) to obtain Y:

9+Y+4=17

<u>→ Y=17-9-4=4 (oz of Iron)</u>

<u></u>

That's all! So, if you have table values, you can just re-write the equations and doing it stepwise, as it is shown here, you can manage to calculate every value you need :)

3 0
3 years ago
Which organism is the primary consumer in this food chain? Oak tree squirrel owl and eagle
sineoko [7]
The squirrel is the primary consumer because it directly consumes the acorns from the oak tree.
8 0
4 years ago
Read 2 more answers
A student fills a small plastic bag with gelatin dessert and different colored beans and candies. Then the student seals the bag
Murljashka [212]
I think it choices A
3 0
3 years ago
Other questions:
  • Considering that millions of species have lived on earth why are there relatively few fossils
    8·1 answer
  • Label the Microscope:
    6·1 answer
  • What is the first step in the creation of a theory?
    5·1 answer
  • 1) What two layers of the atmosphere protect us?
    5·1 answer
  • H. pylori cannot grow in other microenvironments of the human body because the conditions are unsuitable for its growth, but oth
    10·1 answer
  • Which is a component of cell theory?
    15·1 answer
  • Nitrogen cycle and algal bloom
    12·2 answers
  • How do the nutrients necessary for plant growth get into the soil?
    6·1 answer
  • Is Glucose formed as an end product of photosynthesis?
    12·1 answer
  • In each experiment from this lab activity, crosses were performed until there were 100 offspring. If you're trying to determine
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!