Bdbddbdnnrndnden
Explanation:
BdbddbdnrnrnrndnrnrnrnrjrjrnrrnrnrjrjrBdbddbnrrnnrrnrnrnrnrnrjrjrrnnrnrnrdjrnrnrndndndnrn
When a ball is rolling down a hill, what forces are acting on the ball? Why does it speed up?
Include friction and gravity in your answer.
Answer:gravity
Explanation:
Answer:
the gravity speed up because the friction didn't speed up
6th grade science I mark as brainliest zoom in if needed
Calculate the percent composition of chlorine in methyl trichloride, CHCl3.
Answer:
Chlorine --> 89%
Explanation:
Step 1) Add each element's amu up to get the total mass of the compound.
12.011+1.008+3(35.453) = 119.378.
Step 2) Divide the total mass of chlorine by the total mass of the compound.
3(35.453) = 106.359
106.359/119.378 = 0.8909430548.
Step 3) Now multiply by 100 to get the percentage.
0.8909430548*100 = 89.09430548%
Step 4) Estimate and submit your answer
89.09430548% estimates to 89%
materials that are eroded from one location are always ?
Hurry please quick summary
plz help with this.....☺
Answer:
There is this property called CATENATION which is basically the tendency of the atoms to bind to eachother. It is the MOST in the carbon after that silicon.
So the answer should Carbon atoms bond together to form groups of compounds.
compare the values of the spin quantum number for two electrons in the same orbital
A 19.0 g piece of metal is heated to 99.0 °C and then placed in 150 mL of water at 21°C. The temperature of the water rose to 23°C. What is the specific heat of the metal?
Answer:
[tex]0.8696\ \text{J/g}^{\circ}\text{C}[/tex]
Explanation:
[tex]m_m[/tex] = Mass of metal = 19 g
[tex]c_m[/tex] = Specific heat of the metal
[tex]\Delta T_m[/tex] = Temperature difference of the metal = [tex]99-23=76^{\circ}\text{C}[/tex]
V = Volume of water = 150 mL = [tex]150\ \text{cm}^3[/tex]
[tex]\rho[/tex] = Density of water = [tex]1\ \text{g/cm}^3[/tex]
[tex]c_w[/tex] = Specific heat of the water = 4.186 J/g°C
[tex]\Delta T_w[/tex] = Temperature difference of the water = [tex]23-21=2^{\circ}\text{C}[/tex]
Mass of water
[tex]m_w= \rho V\\\Rightarrow m_w=1\times 150\\\Rightarrow m_w=150\ \text{g}[/tex]
Heat lost will be equal to the heat gained so we get
[tex]m_mc_m\Delta T_m=m_wc_w\Delta T_w\\\Rightarrow c_m=\dfrac{m_wc_w\Delta T_w}{m_m\Delta T_m}\\\Rightarrow c_m=\dfrac{150\times 4.186\times 2}{19\times 76}\\\Rightarrow c_m=0.8696\ \text{J/g}^{\circ}\text{C}[/tex]
The specific heat of the metal is [tex]0.8696\ \text{J/g}^{\circ}\text{C}[/tex].
As part of a lab experiment, Tasha drops a metal cube into a beaker of water, as shown in the figure below. heat transfer After energy in the form of heat transfers between the substances, what is the final temperature of the water? Group of answer choices The final temperature is 25 °C because there is more water than metal. The final temperature is 50 °C because the metal warms the water to the temperature of the metal. The final temperature is between 25 °C and 50 °C because most of the thermal energy is lost to the air around the substances. The final temperature is between 25 °C and 50 °C because energy is transferred from the metal to the water.
Answer:
Explanation:ddxc
Where does the water in air come from?
Answer:
About 90 percent of water in the atmosphere is produced by evaporation from water bodies, while the other 10 percent comes from transpiration from plants. There is always water in the atmosphere.✌️
The solute will dissolve quicker if the solute is more?
A. shaken.
B. saturated.
C. cooled.
D. settled.
Answer:
A) Shaken is the correct answer
Explanation:
The other three don't fit in with the solution if you think about it. When you shake something with lemonade crystals (Like a lemonade flavor packet in poured in a water bottle) it dissolves faster when you shake it rather than it sit on the bottom for 15 minutes! :) .
Hope this helps! :)
Answer:
The Person above me is correct
Explanation:
I got it right first try 100%
What is the scientific name for an orca or killer whale?
FIRST ONE WILL BE MARKED “BRAINIEST”
Explanation:
Orcinus orca is the name of orca
Can I borrow a kiss? I promise I’ll give it back.
Answer:
No
Explanation:
WHAT
Answer:
no.............
How many neutrons are present in 1 atom of chlorine?
A.
18
B.
32
C.
16
D.
25
Answer:
18
Explanation:
17 protons + 18 neutrons = 35
17 protons + 20 neutrons = 37 particles in the nucleus
Hope this is right
Hope this helps
Why does the human eye see different colors?
Answer:
Light receptors within the eye transmit messages to the brain, which produces the familiar sensations of color. Newton observed that color is not inherent in objects. Rather, the surface of an object reflects some colors and absorbs all the others. We perceive only the reflected colors.
how many moles are equal to 89.23g of calcium oxide?
mass of calcium oxide equals 89.23 g
molar mass of calcium oxide equals 56 G / Mole
the formula which is used as much of CaO equals molar mass of CaO
now put all of the Given values in this formula, we would get the moles of calcium oxide.
moles of CaO= 88.23g over 56g/mole which would get you 1.593 moles
A scientist measures the heart rates of 30 students from the same class before
and after they run for different amounts of time. The experimental set up is
shown below:
• Group 1 had ten students who ran one lap.
• Group 2 had ten students who did not run at all.
• Group 3 had ten students who ran two laps.
Group 4 had 30 students from another class whose heart rates were
not measured.
Which group is the control in this experiment?
A. Group 1 from this class
B. Group 2 from this class
C. Group 3 from this class
D. Group 4 from another class
The for this question will be d
What is the organism that is harmed in parasitism called? (3 points)
aCompetitor
b Host
c Parasite
d Prey
Answer:
B Host
Explanation:
this is due to the fact that the organism is hosting the parasite
The terms distance and displacement are used by scientists to describe very specific differences between an object's initial position and its final position. Describe a situation in which the distance traveled is great but the displacement is zero.
Explanation:
Distance is the total length of path one travels.
Displacement is the distance between the initial and final position.
For example, if your classroom is located 200m from your dormitory, you walk to class and back to your dormitory, your distance is 200m + 200m = 400m;
Your displacement is 0m. Your initial and final position is the same so no displacement.
Please answer 7-9 i am using alot of my points for this
Answer:
7... simalair: made of more than 2 things DIffernt: elemants are made of atoms.
Explanation:
A bond formed between a fluorine, F, atom and a fluorine, F, atom is likely to be____
A
ionic bond
B.
polar covalent
C
nonpolar covalent
D
alloy
Answer:
c) non polar Covalent
Explanation:
this is a molecule formed by atoms of the same element . they both have similar electronegativities and thus cancel out . This makes it a perfect Covalent molecule . The fact that it's a symmetrical molecule makes it non polar. a symmetrical molecule is a molecule formed by the overlap of orbitals of two atoms of the same element ( that is to say , there's no dipole )
A teacher wants to figure out the amount of a solution that is needed for a titration experiment in a class lab. The class has 15 students, and each experiment needs 50 mL of solution.
If each student will perform the experiment two times, how many mL of solution will the teacher need for the whole class?
375 mL
750 mL
1500 mL
3000 mL
Answer:
Im sure it's 1500 mL
Explanation:
You would have ti multiply by 15 i think
Answer:
It is C) 1500 mL
Explanation:
It is C) 1500 mL
need some help with this
Answer:
Speed
Explanation:
Use the chart to determine which pair of atoms has the greatest difference in electronegativity.
A. Ca – Cl
B. H – Cl
C. Fe – Cl
D. P – Cl
Melted wax has a temperature of 54 deg. Celsius. Physical or chemical property?
The melting of solid wax to form liquid wax and the evaporation of liquid wax to form wax vapor are physical changes. The burning of the wax vapor is a chemical change.
1. Raw egg to boiled egg.
2. Batter to idli.
3. Wet clothes to dry clothes.
4. Woollen yarn to knitted
sweater.
5. Grain to its flour.
6. Cold water to hot water.
7. Straight string to a coiled string.
8. Bud to flower.
9. Milk to Cheese.
10. Cowdung to biogas.
II. Ice cream to melted ice-cream.
12. Stretched rubber band to
its normal size.
13. Souring of milk.
14. Ripening of a mango.
15. Dissolving sugar in water.
these are reversible or Irreversible, chemical or physical, Natural or manmade, periodic or non periodic,desirable or undesirable?
Answer:
1.Irreversible
2.Physical
3.
The speed limit on a certain highway is 80 kilometers per hour. What is this speed in centimeters per second?
The speed : 2222.2 cm/s
Further explanationVelocity has magnitude and direction
Can be formulated :
[tex]\tt \boxed{\bold{v=\dfrac{d}{t}}}[/tex]v= velocity, m/s
d=distance=m
t=time,s
convert from km/h to cm/s :
[tex]\tt =80\dfrac{km}{h}\times \dfrac{10^5~cm}{1~km}\times \dfrac{1~h}{3600~s}\\\\=2222.2~\dfrac{cm}{s}[/tex]In which medium will a sound wave move more quickly?
Ethanol, air, vacuum, rock.
Answer:
Rock
Explanation:
cell phones use digital signals to send amd receive information. these digital signals travel as what kind of wave?
A.gamma rays
B.x-rays
C.microwaves
D.radio waves
A sample of water is heated from 60.0 °C to 75.0°C by the addition of 140 j of
heat. What is the mass of the water?
work too pls !!!
Mass of the water : 2.23 g
Furter explanationHeat
Q = m.c.Δt
m= mass, g
c = heat capacity, for water : 4.18 J/g° C.
ΔT = temperature
Q= 140 J
Δt = 75 - 60 = 15
mass of the water :
[tex]\tt m=\dfrac{Q}{c.\Delta T}=\dfrac{140}{4.18\times 15}=2.23~g[/tex]
