Which of these answers describes a scientific law?
(Pls)

Answer:

big ablsolty long pp

Explanation:

dong

sound travels at 331m/s. How long would it take for sound to travel across lake tahoe, which is 21.6 miles long

Chewing food to break it down into smaller particles represents a physical change, but the charging of starch into sugars by enzymes in the digestive system represents a chemical change.Chemical or physical change?

Which of these are PHYSICAL changes?
А.
cutting, tearing, freezing, thawing, folding.
mixing without chemical changes
B.
burning, rusting, forming a new substance from
two different substances, exploding, cooking

!!DUE TODAY, NEED HELP ASAP!!
A student measured the masses of some aluminum and copper cylinders of different volumes. The data is displayed below:
Aluminum: Copper:
Volume (mL)
Mass (g)




Volume (mL)
Mass (g)
3.7
9.99




1.8
16.02
6
16.2




2.3
20.47
8.5
22.99




3.5
31.15
10.74
29




4.2
37.38
15
40.5




5.8
51.62



On graph paper graph the data above on ONE graph. Use the graph paper so the longer side is your y-axis.
Use up the majority of the graph paper. Do not make a small graph!
Use a ruler/straight edge so you graph is neat.
You will need to plot the points for each substance and create a double line graph. When connecting your points for each substance, continue the lines past the plotted points.
Be sure to include a key to identify the substances.
Make your X-axis volume(mL) and your Y-axis mass(g)
Look at the numbers for both substances when creating your scales. You will most likely have a different scale for mass and volume. What is the lowest number? What is the highest number? What does it make sense to go by?

Calculate the density of each metal.

Aluminum:_________________________ Copper:________________________



What happens to the mass of the copper at the volume increases from 6 to 8mL?




Which sample is more dense? How does the graph show you this?

will mark brainliest if correct
Which methods separate a mixture according to the size of the particles?

a
filtration and chromatography
b
distillation and chromatography
c
filtration and evaporation
d
distillation and evaporation

What is the control in the experiment?

Give an example of a non-biological chemical reaction that involves carbon. Name the process that converts a solid compound into a gas.

Which of the following statements about alcohols is false?
A. Ethanol is soluble in water.
B. Ethanol has a higher boiling point than ethane.
C. Ethanol produces hydrogen when it burns.
D. None of these

Help!! due tomorrow













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If you burn a citronella candle near your picnic will it keep mosquitoes away

Freezing water cracking limestone

a
Chemical Change
b
Physical Change

cuantos gramos de soluto y solvente tendra 127 gramos de solición cuya concentración es 14% m/m ayuda para resolverlo

What causes the pressure inside oxygen tanks to change as they are filled?
A. The volume of the container changes.
B. The temperature of the gas changes.
C. The number of gas molecules changes.
D. The pressure outside the tanks changes.

Vapor pressure of any liquid _______. A. increases with increases in temperature B. increases with decreases in temperature C. is not affected by changes in temperature D. increases with increases in volume of the liquid E. None of the Above

what is the concentration of hydrogen ion, H+, present in a water sample if 100. ml of the sample requires 7.2 ml of 2.5 x 10 -3 M NaOH to be neutralized

All the following process produces hematite except
A roasting of siderite
B oxidation of iron
C oxidation of magnetite
D drying of limonite
E no correct answer

Plzzzzzz help me Write electronic configuratof sodium and chlorine in the term of subshell ?

Element Z has 2 natural isotopes. One isotope has a mass of 15.0 amu and a relative abundance of 30%. The other isotope has a mass of 16.0 amu. What is the second isotope's relative abundance?

May someone help me with the answer to this question I’ve been stuck on it

English
M.
3.x - 9
2r-7
.X + 2
18

Describe the color change that would be observed in water in left hand beaker

what is force ?write its effects. ​

HELP IM TIMED!!!!!!!!!
Yellowstone National Park has an average of about 4500 bison living in it. The park covers 3472 square miles. What is the population density of bison living in Yellowstone? a. 1.3 bison/mi^2 b. 16 bison/mi^2 c. 77 bison/mi^2 d. 0.77 bison/mi^2

Density and Years: What do you know?Objectives: determine and compare density of pennies to assess composition. Procedure:1. Read the directions and create a data table accordingly.2. Place 15-20 pennies in order of consecutive dates. Find the mass of each penny and record.3. Find the volume of all 5 pennies by water displacement and record in your data table. Record the volume adding 5 more pennies at a time until you have measured them all (15-20).a. Find the average volume of 1 penny.4. Calculate the density of each penny and graph according to the year.5. If the density of copper is 8.96 g/cm3 what would the mass of a pure copper penny be?6. Draw a conclusion.7. How might this relate to a real world example?

Come up with 2 examples of derived units from everyday life.

What is the approximate mass of one electron?

A pan containing 20.0 grams of water was allowed to cool from a temperature of 95.0 °C. If the amount of heat released is 1,200 joules, what is the approximate final temperature of the water?
75 °C
78 °C
81 °C
87 °C

PLZ HELP MEEE

A tire company wants to determine what kind of rubber will last the longest for their tires. What are some variables that the researchers will want to make controlled variables?

what is sublimation ​

Compare and contrast the three types of mixtures (solutions, colloids, and suspensions).