safety laboratory rules
Answer:
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Explanation:
Know locations of laboratory safety showers, eyewashstations, and fire extinguishers. ...
Know emergency exit routes.
Avoid skin and eye contact with all chemicals.
Minimize all chemical exposures.
No horseplay will be tolerated.
Assume that all chemicals of unknown toxicity are highly toxic.
Answer:
Rule #1 - WALK
Rule #2 - PROPER LAB ATTIRE
Rule #3 - HANDLING CHEMICALS
Rule #4 - HANDLING EQUIPMENT
Rule #5 - BROKEN GLASS
Rule #6 - EYE WASH/SHOWER
Rule #7 - FIRE SAFETY
Rule #8 - EATING/DRINKING IN LAB
Rule #9 - CLEANING UP
Rule #10 - HAND WASHING
Explanation:
why old system of measurement isn't accepted nowadays
Explain the difference between transverse wave and longitudinal wave.
Answer :
Transverse wave is a wave which vibrates or oscillates at right angles to the direction the wave or energy is moving
Examples : light waves abd waves that are traveling on the surface of the water.
Longitudinal waves is a wave which vibrates or oscillates to the direction the energy or wave is moving
Example : sound waves
Answer:
» A transverse wave is made up of crests and troughs at maximum displacements hence vibrating energy at right angles, where as a longitudinal wave is made up of compressions and rare factions where energy is assigned and kept in those particle density regions
Explanation:
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what are the functions of androcium?
Answer:
The point of stamen, which connects the anther and the filament is called connective. Its main function is the production of microspores, i.e., pollen grains containing male gametes within the anther lobe.
Explanation:
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Scientists don't claim to_______
the theory. They just claim that the
results_______
it.
Answer:
scientists dont claim to know the theory they just claim that the results r true
Explanation:
Name the water-conducting tissue into which the two probes were inserted...
Answer:
Tracheids and vessels are two water conducting hollow tubes present in the vascular tissue called is xylem. Xylem in a plant is responsible for transporting water from the roots to other parts of the plant.
Xylem is the water-conducting tissue into which the two probes were inserted in the diagram shown.
What is Xylem?This is a vascular tissue found in plants which convey water and nutrients from the root to other parts for its survival.
Tracheids and vessels are the two water conducting hollow tubes present in the xylem.
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what is the function of the Vaseline
Answer:
Chesebrough noticed that oil workers would use a gooey jelly to heal their wounds and burns. He eventually packaged this jelly as Vaseline. Petroleum jelly's benefits come from its main ingredient petroleum, which helps seal your skin with a water-protective barrier. This helps your skin heal and retain moisture.
Explanation:
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Answer:
Explanation:
What Vaseline does is seal existing moisture into your skin. It also protects skin that's been injured or irritated by forming a seal or barrier where it's applied. With this barrier, petroleum jelly effectively reduces how much moisture is lost from the skin.
State the differences between an animal cell and a plant cell. Explain why certain structures are present in a plant cell but not in an animal cell. (6)
Explanation:
Animal cells have centrosomes (or a pair of centrioles), and lysosomes, whereas plant cells do not. Plant cells have a cell wall, chloroplasts, plasmodesmata, and plastids used for storage, and a large central vacuole, whereas animal cells do not.
What type of feet do peacock have
Answer:
Sadly the peafowl are unable to swim, they have four toes on their feet. Three toes face forward and one toe faces backwards. This unique combination of toes enables the peacock to perch easily on branches of trees. They do not have webbed feet which are necessary for birds to actively swim.
Explanation:
Here is ur answer.
(*Its actually Physical Science)
Which kind of bond would occur between sodium (Na, Group IA) and chlorine (CI, Group VIIA)?
A. ionic
B. no bond
C. metallic
D. covalent
The type of bond that occur between sodium (Na, Group IA) and chlorine (CI, Group VIIA) is ionic. That is option A.
Ionic bond occurs when there is complete transfer of electrons from one atom to another in order to attain a noble gas electron configuration.
A typical example of an ionic compound is sodium chloride which is formed from sodium (Na, Group IA) and chlorine (CI,Group VIIA).
The halogens (which are Group VIIA) all have seven electrons in their outer shell. They gain an extra electron to form an ion with a single negative charge
While the alkali metals (Group IA) all have one electron in their outer shell. They lose this electron to form an ion with a single positive charge.
When complete transfer of electrons occurs, the sodium atom losses one atom to attain Neon atom configuration while the chlorine atom gains one atom from sodium to attain Argon atom configuration.
Therefore, the type of bond that occur between sodium (Na, Group IA) and chlorine (CI, Group VIIA) is ionic.
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Answer: ionic.
Explanation:
list earth's main regions in order from largest to smallest population as of the year 2010
Answer:
These Are The Largest to Smallest Regions in Order. By Population, Of Course.
# Region Population
(2020) Yearly
Change Net
Change Density
(P/Km²) Area
(Km²) Migrants
(net) Fert.
Rate Med.
Age Urban
Pop % World
Share
1 Asia 4,641,054,775 0.86 % 39,683,577 150 31,033,131 -1,729,112 2.151942002 32 0 % 59.5 %
2 Africa 1,340,598,147 2.49 % 32,533,952 45 29,648,481 -463,024 4.438374895 20 0 % 17.2 %
3 Europe 747,636,026 0.06 % 453,275 34 22,134,900 1,361,011 1.609646027 43 0 % 9.6 %
4 Latin America and the Caribbean 653,962,331 0.9 % 5,841,374 32 20,139,378 -521,499 2.044660431 31 0 % 8.4 %
5 Northern America 368,869,647 0.62 % 2,268,683 20 18,651,660 1,196,400 1.75268862 39 0 % 4.7 %
6 Oceania 42,677,813 1.31 % 549,778 5 8,486,460 156,226 2.357006916 33 0 % 0.5 %
Explanation:
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Identify 1 food chain that is a part of this food web. Your chain should include both the organism's name and arrows to depict what is prey upon by whom.
Answer:
Is this what you are looking for
can yall help me this is honors bio and im very tired please help
Answer:
A.
Explanation:
Lipids are a class of macromolecules that are nonpolar and hydrophobic in nature. Major types include fats and oils, waxes....
Triglycerides are a type of fat (lipid) found in your blood.
Phospholipids, also known as phosphatides, are a class of lipids
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what are the precautions that should be token when using a photometer? please help me
Answer:
PRECAUTIONS FOR USING A SPECTROPHOTOMETER :
1 . By allowing the lamps and electronics to warm up
2.By cleaning up any spills inside the cuvette compartment
3.By carrying out the set-up procedure in the correct order
4.By ensuring that %T or transmission is used as appropriate
5.By closing the door to the cuvette compartment before reading the result
6.By performing calibration checks after set up
7.By wiping fingerprints and spilt sample off the outside of the cuvette before measuring
8.By using the correct wavelength
PRECAUTIONS FOR USING A FRAME PHOTOMETER:
1. Do not move or Carry the unit when in use or connected to the mains electricity supply
2. There should be sufficient time for the chimney to cool before handling
3. Do not use acetylene with the flame photometer
4. Over adjustment of the fuel valve will cause excess flame
Do not position the product so that it is difficult to disconnect from the mains supply
5. Do not cover the chimney whilst in use.
6. Do not block or obstruct ventilation slots /airways
7. Do not operate or handle any part of the product with wet hands
I HOPE THIS WILL HELP AND IF NOT LET ME KNOW
Proteins are composed of which molecules?
amino acids
fatty acids
monosaccharides
nucleic acids
Answer:
Amino acids
Explanation:
the building blocks of proteins are amino acids
Iron deficiency is one of the most common nutritional deficiencies in premenopausal women. Iron is a vital part of hemoglobin, which carries oxygen to red blood cells. Why do you think premenopausal women need more iron than men of the same age?
Answer:Premenopausal women shed blood as part of menstruation every month, which lowers the level of iron in the body. So, they need more iron than men and are also at a greater risk for this nutritional deficiency.
Explanation:
which two cell organelles come together to form protoplasm
Answer:
Protoplasm is defined as the organic and inorganic substances that constitute the living the nucleus, cytoplasm, plastids and mitochondria of the cell.
PORQUE SE REPRESENTA EN FORMA DE PIRÁMIDES LOS NIVELES TRÓFICOS Y LA ENERGÍA?
attached below, open it (translated)
Right answer gets brainlist
Answer:
$75?
Explanation:
Your hand pop up after touching a hot stovetop. Which two organs systems are most responsible for your reaction?
A. nervous and respiratory
B. immune and muscular
C. nervous and muscular
D. circulatory and muscular
Answer:
nervous and muscular
4. What is polarity?
Answer:
The proclivity of biological organisms or components to have distinct anterior and posterior (or highest and lowermost) ends, as well as to grow or orientate in a specific direction.
why velocity is regarded as a vector quantity?
Answer:
Because velocity has magnitude and direction, speed is not a vector quantity since it only has magnitude
For example, if a car is moving backwards with a speed of 40m/s
Your velocity is - 40m/s
Speed is 40m/s
You are transporting an unresponsive intubated 4-year-old child. An IO catheter is in place, and you are ventilating the child at an age-appropriate rate. Suddenly, the child becomes cyanotic and experiences a significant drop in her heart rate and oxygen saturation, and loss of a capnographic waveform. You attempt to auscultate her lung sounds but are unable to hear over the drone of the engine. You should:
A. look for vapor mist in the ET tube and attach a colorimetric device.
B. extubate immediately and ventilate with a bag-mask device.
C. increase your ventilation rate and reassess the child's condition.
D. administer 0.02 mg/kg of atropine via rapid IO push and reassess
Answer:
B. extubate immediately and ventilate with a bag-mask device.
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Answer:
the picture is not clear please post again
Explanation:
What is a possible answer to a scientific question, based on
evidence that can be tested by observation or
experimentation?
Answer:
A hypothesis is a possible explanation for a set of observations or an answer to a scientific question. A hypothesis must be testable and measurable. This means that researchers must be able to carry out investi- gations and gather evidence that will either support or disprove the hypothesis.
16. Explain Where do
slime molds get their
nutrients?
Answer:
These organisms exhibit properties of both fungi and protists. The slime molds and the water molds are members of this group. They all obtain energy by decomposing organic materials, and as a result, are important for recycling nutrients. They can be brightly colored and live in cool, moist, dark habitats.
Genetic variation occurs within the same species. True or False?
Answer:
True
Explanation:
Genetic variation describes naturally occurring genetic differences among individuals of the same species. This variation permits flexibility and survival of a population in the face of changing environmental circumstances.
Explain why there is a difference in the amount of oxygen taken in at rest and during the vigorous activity.
Answer: During vigorous exercise your breathing rate increases in order to intake more oxygen
Explanation: during vigorous exercise / activity the body needs more oxygen in order to produce energy so your breathing rate increases in order to reach the demand of more intake of oxygen , and your muscles work harder due to an increase in oxygen demand and how much oxygen the muscles take from the blood during vigorous exercises , BUT during rest we have normal rate of oxygen intake because your body is at rest at that moment .
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You want to place a piece of glass tubing into a rubber stopper after the tubing has been fire polished and cooled. This is best done by
A. lubricating the tubing with water or glycerin.
B. using a towel or cotton gloves for protection.
C. twisting the tubing and stopper carefully.
D. all of the above.
Answer:
a
Explanation:
The history of Poland from 1945 to 1989 spans the period of communist rule imposed over Poland after the end of World War II.
In what organelle do the Kreb's cycle and the electron transport chain take place?
(1 point)
0. chloroplast
O mitochondria
O cytoplasm
o nucleus
Answer:
mitochondria
Explanation:
-The aerobic phases of cellular respiration in eukaryotes occur within organelles called mitochondria. These aerobic phases are the Krebs Cycle and the electron transport chain.
The Kreb's cycle and the electron transport chain take place in the MITOCHONDRIA.
Cellular respiration is an aerobic process, i.e., a metabolic process that requires oxygen (O2) by which energy from foods is used to synthesize ATP, carbon dioxide (CO2), and water (H2O). The three stages of cellular respiration are glycolysis, Kreb's cycle (also known as the citric acid cycle), and the electron transport chain.Glycolysis is an anaerobic pathway (i.e., does not require O2) and occurs in the cytoplasm.The Kreb's cycle and the electron transport chain (ETC) are both aerobic processes that occur in the intern membrane of the mitochondria.In conclusion, Kreb's cycle and the electron transport chain occur in the mitochondria.
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