Answers
Answer:
In science, sound is defined as the transfer of energy from a vibrating object in waves that travel through matter. Most people commonly use the term sound to mean what they hear when sound waves enter their ears. The tree above generated sound waves when it fell to the ground, so it made sound according to the scientific definition
Explanation:
sound waves
Related Questions
Qué sucede al disolver una tableta de ALKA-SELTZER en agua caliente?
Answers
Answer:
FREE POINTS CUZ I DON'T UNDERSTAND
Explanation:
You need to buy some shirts and pants for
school. Pants cost $20 each and shirts cost
$15 each. You have $120, and need to buy at
least 9 items.
Answers
Answer:
Explanation: I did the work online because I just worked on this.
y=shirts
20x+15y ≤120
You can buy 2 pants, 2•20=40; you can buy 5 shirts, 15•5=75.
40+75=115
115 ≤120
You could buy
1 pair of pants and 6 shirts, 20+90=110
Can someone please help with this one question
Answers
Make sure to follow the algebra rule of what you do to one side you must do to the other side of the equal sign.
So the goal is to isolate T. That means you need to get rid of the nR which can be done by division. Because you divided nRT by nR you must divide PV by nR.
In the end you get T = PV / nR
Which of the following is a true statement?
A. Water breaking apart rocks by freezing and thawing is an example of physical weathering.
B. Water moving pieces of rock from one place to another is an example of chemical weathering.
C. Glaciers carrying rock from one place to another is an example of chemical weathering.
D. Glaciers carrying rock from one place to another is an example of physical weathering.
Answers
Answer:
B. Water moving pieces of rock from one place to another is an example of chemical weathering!
hope it helps
please mark as the brainliest!
What is the rate of effusion of Xenon (Xe) gas if the rate of Chlorine (Cl) gas escaping
through a fluorescent light fixture is 2.5 L/min?
Answers
Which of the following is a population
Answers
A 34 kg child has 190 J of kinetic energy after sledding down a hill. What is the child’s velocity in meters per second at the bottom of the hill?
Answers
Answer: 3.34 meters
Explanation:
If the kinetic energy formula states that 1/2mv^2= KE then we are solving for v. We already know mass and Joules so the equation becomes
[tex]\frac{1}{2}[/tex](34)[tex]v^{2}[/tex]=190
17v^2=190
v^2=190/17
v=3.34
Solve for V
V=3.34
A rock sitting on the surface of the Earth is pushed down deep into the Earth over time and is exposed to tremendous heat and pressure over time. Although the rock does not melt, it does change into a new type of rock.
Answers
Answer:
The rock changes into a Metamorphic rock
Explanation:
Usually, metamorphic rocks start out as some other type of rock, either igneous, sedimentary or even a metamorphic rock. The process of transformation is known as Metamorphism.
When a rock sitting on the surface of the earth is pushed down deep into the earth over time and is exposed to tremendous heat and pressure over time and does not melt, it changes into a metamorphic rock.
A metamorphic rock is formed from a combination of factors such as tremendous heat, high pressure, hot fluids rich in minerals which are all found deep down in the earth.
What is the pOH of a substance when [H+] = 5.4 x 10^-8 M
Answers
Answer:
pOH = 6.73
Explanation:
First, calculate pH = -log[H+] = -log(5.4 x 10^-8) = 7.27
pOH + pH = 14, so pOH = 14 - 7.27 = 6.73
Which statement compares you tractive forces that hold particles together
Answers
Answer:
Metallic and covalent bonds are strongly attractive; hydrogen bonding and Van der Waals forces are weakly attractive.
Explanation:
cause
In a chemical reaction between copper metal and silver nitrate, 12.7 g of copper(II) and 64.5 g of silver nitrate react, and 38.1 g of Silver is produced. 21) Predict the products and write the balanced equation and include the physical state of each. 22) What type of chemical reaction is this? 23) Which is the limiting reactant? You must include the work for this to receive full credit. 24) What mass of excess is used up, and what mass is left over? 25) Calculate the percent yield.
Answers
Answer:What should you do if you realize during research that your original theory is wrong
Explanation:
Chemistry: Atoms and elements. having trouble figuring out how to find out what element these atoms represent any help will be apreciated.
Answers
Answer:
Elements are types of atoms that have a unique number of protons. In fact, from left to right, the periodic table is arranged by the number of protons that each element contains. oms make up matter. An atom is the smallest unit of matter that retains all of the chemical properties of an element.
Explanation:
Separation units often use membranes, absorbers, and other devices to reduce the mole fraction of selected constituents in gaseous mixtures. Consider a mixture of hydrocarbons that consists of 62 percent (by volume) methane, 28 percent ethane, and 10 percent propane. After passing through a separator, the mole fraction of the propane is reduced to 1 percent. The mixture pressure before and after the separation is 100 kPa. Determine the change in the partial pressures of all the constituents in the mixture.
Answers
Answer:
See explanation
Explanation:
We first obtain the mole fraction of propane at the start and end;
0.01 = x/0.62 + 0.28 + x
0.01[0.62 + 0.28 + x] = x
0.01[0.9 + x] =x
9 * 10^-3 + 0.0.1x = x
9 * 10^-3 = x - 0.0.1x
9 * 10^-3 = 0.99x
x = 9 * 10^-3/0.99
x = 9.09 * 10^-3
After
For methane
0.62/ 0.28 + 0.62 + 9.09 * 10^-3 = 0.68
For ethane
0.28/0.28 + 0.62 + 9.09 * 10^-3 =0.31
Change in partial pressure of methane = (0.68 - 0.62) * 100kPa = 6 kPa
Change in partial pressure of ethane = (0.31 - 0.28) * 100kPa = 3 kPa
Change in partial pressure of propane= (0.01 - 0.1) * 100kPa = -9 kPa
i really need these solved, it’s asking for half equations!!
Answers
Answer:
Net equation: Cu + 2Ag+ ⇒ 2Ag + Cu2+
Explanation:
Cu + 2N03- + 2Ag+ ⇒ 2Ag + 2NO3- + Cu2+
The 2NO3- cancel out since they're spectator ions
∴ Cu + 2Ag+ ⇒ 2Ag + Cu2+
Half equations are:
Cu ⇒ Cu2+
2Ag+ ⇒ 2Ag
Balancing both sides of each equation with electrons will lead back to the Net equation.
Given two objects, the object with the _______________ mass will be pulled to the object with the _______________ mass.
Answers
Given two objects, the object with the least mass will be pulled to the object with the most mass.
Answer:
the answer is simple the object with the lower mass would be pulled to the object with the bigger mass
Explanation:
hope i helped
7
Jacob has a bucket of ice. He covers the bucket with a lid and sets it in the sun. The ice melts into liquid water. How does the mass
of the ice compare with the mass of the water?
OA
The mass of the ice is less than the mass of the water
ОВ.
The mass of the ice is more than the mass of the water
OC.
The mass of the ice is the same as the mass of the water.
OD
There is no way to determine this from the information given.
Answers
Answer: (C) the same
Here's what I'm thinkin: Since the bucket has a lid, then no water was evaporated thus the mass wouldn't decrease. Also, Jacob didn't add any substances to the bucket of ice, so the mass wouldn't increase. You know? Sorry if this is wrong, but that's how I figured the answer.
Explanation:
Trust Milky. Milky smart.
i need help!! i need to make it like 3:2
Answers
Answer:
use visual studio code and put in this print{3:2}-1
Explanation:
A container with a mixture of water and ice is at 0°C What will happen if energy is added to or removed from the water?
Answers
Answer:
It will freeze or melt
Explanation:
Ice will melt if energy added
Water will freeze if energy removed
CAN SOMEONE PLEASE HELP ME?!
Answers
Answer:
no
Explanation:
because
What is the chemical formula for oxygen tetrabromide?
Answers
OBR4.......... orange one lol
How do the circulatory and the excretory systems work together to maintain the human body on a daily basis?
Answers
Answer:
The circulatory system brings blood through the kidneys where nitrogenous wastes can be filtered. The urinary system helps the circulatory system by maintaining salt balance in the body and adjusting blood pressure by getting rid of or holding on to more water.
Explanation:
PLLZZZZ HELPPPP IT IS A TIME ASSIGNMENT !!!
Answers
Answer:
plato is the answer
Explanation:
that what i think it it is
What creates a bond dipole and how can you tell if a bond dipole exists?
Answers
Answer:
A dipole exists when there are areas of asymmetrical positive and negative charges in a molecule. Dipole moments increase with ionic bond character and decrease with covalent bond character.
(15 POINTS) arrange the conversion factors in order as displayed in the pic
Answers
Answer:
3,1,2
Explanation:
3 bc u go get liters
1 because ur going from C3H8 to CO2
2 because ur getting CO2 liters
EASY!!!!! ILL MARK BRAINLIEST!!!!!!!!
why does measured current differ from calculated current
Answers
Answer:
No component is perfect. All have tolerances that can vary. If you construct a simple circuit where a 10 volt power supply feeds a 10 ohm resistor, you would expect to measure a current of one ampere. BUT - the wiring has some resistance too. This adds perhaps 0.1 ohms to the circuit. The resistor has a +-5% tolerance. If it is 5% high, it may measure 10.5 ohms. That's a total circuit resistance of 10.6 ohms. The power supply may have a tolerance of +-1%. Suppose it's 1% low. That's an output of 9.9 volts in real life. So you have 9.9 volts dropped across 10.6 ohms. you will measure closer to 0.934 amps instead of 1.000 amps. To make matters worse, most electronic components have a temperature coefficient, that is, their values change with different temperatures. You may get a completely different reading tomorrow if the temperature is different! Finally, with current measurements in particular, you are inserting the ammeter in series with the circuit under test. Ammeters have some inherent resistance too, so by putting the ammeter in the circuit, you are changing the very current you are trying to measure (a little)! Oh yeah, the ammeter has a tolerance too. Its reading may be off a little even if everything else is perfect. Sometimes you have to wonder how we get a decent reading at all. Fortunately the errors are usually fairly small, and not all tolerances are off in the same direction or off the maximum amount. They tend to cancel each other out somewhat. BUT - in rare circumstances everything CAN happen like I said, and the error can be huge.
Explanation:
What are the concentrations of urea
Answers
Answer: In general, the non-renal causes of increased plasma/serum urea result in a mild to moderate increase (usually no greater than 10.0 mmol/L (BUN 28 mg/dL). Concentration in patients with renal dysfunction can range from mildly increased to severely increased, depending on severity of disease.
Explanation:
When NH4SCN is added to a solution of Fe3+ ions, the solution changes from yellow to orange. What is the best explanation for this color change?
Answers
Answer:
The iron present in the solution is reduced because of the presence of SCN⁻ ions in solution
Explanation:
The clue in this problem is the color of the solution:
A solution of Fe³⁻ is yellow but when the Fe³⁺ is reduced by an oxidant to Fe²⁺ the solution change to orange color.
The SCN⁻ ion is a reducing agent than, in presence of a substance that can be reducted as Fe³⁺ ion will promote the reaction. That means the best explanation is:
The iron present in the solution is reduced because of the presence of SCN⁻ ions in solutionA Textbook of
Information
Technology
(Subject code 402)
What is Information technology??
Please don't post invalid answer..!!
Answers
Explanation:
Information Technology CBSE Code 402 for class IX and X is based on National Skills Qualifications Framework. The book is designed and structured to help learner acquire the knowledge and skills regarding conputers, office productivity tools and internet necessary in real life competitive worlf
why are the first bubbles of oxygen prduced not collected?
Answers
Answer:
because I don't know the answers sorry maam
to find the number of atoms look at the number known as the________. Please help.
Answers
Answer:
molar mass or AMU
Explanation: