Answer:
none of them are equal to one mole
Identify the independent and dependent variables in the following experiment: A scientist grew bacteria on the gel in her lab. She wanted to find out if the bacteria would grow faster on gel A or gel B. She placed a few bacteria on gel A and a few on gel B. After 24 hours, she observed how many bacteria were present on each type of gel.
The dependent was before she started changing them and the independent variable is the process of them changing.
The independent variable is the type of gel, the dependent variable is the growth rate of the bacteria.
Dependent variables and independent variables are terms used in mathematics, statistics, and other experimental sciences. Each of them is characterized by:
Dependent variable: Its value is the result of a series of variable conditions that are modified on purpose.Independent variable: These are variables that are modified on purpose to show a phenomenon and obtain a result in a dependent variable.According to the above, in the situation presented, the independent variable is the type of gel because two types of gel are used, to obtain different results according to the characteristics of each gel.
Additionally, the dependent variable of this experiment is the growth rate of the bacteria under different conditions (gel A and gel B).
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A solid rubber ball with a mass of 5.9 grams sank in water. A hollow rubber ball with the same mass floats in water. Explain why this might be. Please answer ASAP!
Answer:
The hollow ball is more buoyant than the solid ball.
Explanation:
The hollow ball will float while the solid ball sinks because the volume of water displaced by the hollow ball is more than that displaced by the solid ball.
An object floats when it displaces a volume of water equal to its weight. A solid ball is more compact, and hence, does not displace a lot of water when dropped into a bowl full of water. On the other hand, the hollow ball will have a larger curved surface area, since it has no fill. This will make it displace a larger volume of water and hence make it float.
Which element is commonly found in meteorites?
carbon
oxygen
iron
hydrogen
Answer:
Hello!!! Princess Sakura here ^^
Explanation:
The most commonly found element is oxygen.
Answer:
Iron
Explanation:
I took the quiz
Madison was reading about force in her science textbook and came across a lab that she wanted to do. Madison took detailed notes of the lab produce to use the next day what specific process is Madison demonstrating by conducting the experiment
Answer:
what i dont understand the question
Explanation:
Use the drop-down menus to indicate the stage of technological design in which each action would occur.
Answer:
Use the drop-down menus to indicate the stage of technological design in which each action would occur.
✔ Design a solution.
Establish criteria and prepare the initial design.
✔ Evaluate a solution.
Redesign and retest as necessary.
✔ Identify a problem.
Define a need and research related information.
✔ Implement a solution.
Build and test a prototype.
Explanation:
Took the quiz
Answer:
Design a solution: establish criteria and prepare the initial design.
Evaluate a solution: redesign and retest as necessary.
Identify a problem: define a need and research related information.
Implement a solution: build and test a prototype.
If you had an object with a density of 1.12 g/cm2, would it sink or float in a container of salt water that has a density of 1.35 g/ml?
a -sink
b-float
The object will float on the salt water.
We have an object of density 1.12 g/cm³.
We have to determine whether it will sink or float in salt water of given density.
How many milliliter are their in 1 cm³ ?In 1 cm³ there are 1 ml
According to the question -
Density of object = ρ(O) = 1.12 g/cm³.
Density of salt water = ρ(S) = 1.35 g/ml = 1.35 g/cm³.
For the object to sink its density should be greater than that of the salt water. Mathematically -
ρ(O) > ρ(S) → Object will sink.
ρ(O) < ρ(S) → Object will float.
Now, it can be seen that -
ρ(O = 1.12) < ρ(S = 1.35)
Therefore, the object will float on the salt water.
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1. Compare an element, compound and mixture.
Answer:
An element contains just one type of atom. A compound contains two or more different atoms joined together. A mixture contains two or more different substances that are only physically joined together, not chemically. A mixture can contain both elements and compounds.
Explanation:
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What is 1 item that is a compound?
Give an example of how the 1 item is a compound :D
Water
Water is a compound because it is made from more than one kind of element (oxygen and hydrogen).
ASAP MULTIPLE CHOICE WILL MARK BRAINLIEST
Who determined the mass of the electron?
Niels Bohr
Linus Pauling
Robert Millikan
J.J. Thomson
Answer:
J.J. Thomson
Explanation:
According to my book and wiki, Historically, the mass of the electron was determined directly from combining two measurements. The mass-to-charge ratio of the electron was first estimated by Arthur Schuster in 1890 by measuring the deflection of "cathode rays" due to a known magnetic field in a cathode ray tube. It was seven years later that J. J.
Please correct me if I'm wrong.
Answer:
Robert Millikan
Explanation:
Robert was the true answer
Which is the best way to determine if an object is made of pure silver?
Answer:
The Nitric Acid Test is used to check if silver is pure or plated. To do so, file a small part of the item in a discreet area where it cannot be seen. Apply a few drops of nitric acid. If the area turns into creamy white, the silver is pure or sterling.
Explanation:
10, What is the Dependent Variable?
how does one burn coffee
Answer:
coffee can be burnt
Explanation:
coffee can be burned when brewing. When an empty pot sits on the heating element in a restaurant coffee machine it can get very hot. When the first stream of a new brew cycle hits the bottom of the pot, boils off very quickly, producing a horrible smell and taste that infuses the entire pot.
Which food molecules are inside the tube
Answer:
I'm sorry what this question needs more context.
Explanation:
Answer:what are the foods?
Explanation:
Which two physical properties allow a mixture to be separated by chromatography?
Solubility and molecular polarity
Describe air using the terms: mixture, atoms, and molecules.
Answer: Here you go.
Explanation:
The atoms in molecules are joined by covalent bonds. Air is a mixture that contains the elements nitrogen, oxygen and argon, and also the compound carbon .
Hope this helps!
What is the percent error if the measured value is 30.0 g and
the accepted value is 32.0 g?
Answer:6.25
Explanation:
Answer:
6.25
Explanation:
what affects the rate at which acid rain reacts with a statue
The thing that affects the rate at which acid rain reacts with a statue is the concentration of sulfur dioxide and carbon dioxide in the environment.
What is Acid rain?Acid rain may be defined as a type of precipitation on the surface of the earth that involves a significant amount of acids like nitric acid, sulphuric acid, and carbonic acid due to the heavy concentration of nitrous oxide, carbon dioxide, and sulfur dioxide in the environment.
This high concentration of acids in acid rain generally reacts with metals and corrodes them. They permanently lose the actual shine of marble, statues, buildings, etc.
The concentration of these acids typically affects the rate at which acid rain reacts with a statue. If there is a high concentration, it highly influenced the property of statues.
Therefore, the thing that affects the rate at which acid rain reacts with a statue is the concentration of sulfur dioxide and carbon dioxide in the environment.
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The drawing shows an apple falling to the ground. In which of the following three
positions does gravity act on the apple?
Position 1
Position 2
Position 3
A.
B.
C.
D.
2 only
1 and 2 only
1 and 3 only
1, 2 and 3
Answer:
its 1 and 2
Explanation:
because the 3rd one is alrdy in the ground
Please Help!!!!! Need by 11:30
Answer:
D i think
Explanation:
The Sun releases a lot of energy in many different forms. The Earth receives a small portion of this energy but it is enough to help keep the atmospheric temperature from changing too much. Which of the following allows the Sun’s energy to reach the Earth? (SC.7.P.10.1)A. conduction B. convection C. radiation. D. reflection
C would be my best guess because of ultraviolet radiation
Hope this helps! Good luck :)
What trend does the atomic radius follow along a period on the periodic
table?
O A. The atomic radius gets smaller the farther right it appears on the
periodic table.
O B. The atomic radius stays constant across the periodic table.
O C. The atomic radius increases as the number of protons increases
across the table.
O D. The atomic radius gets larger the farther right it appears on the
periodic table.
If you were approaching the solar system in a spaceship, you would notice that the Sun
Answer:
No
Explanation:
Calculate the volume in L of 14.25 g of Oz gas at STP.
If we compare and contrast the three liquids seen in the jar, the BEST explanation would be that
A)
water is lighter than oil and syrup.
B)
syrup is the thickest liquid of the three.
oil is the least buoyant of the three liquids.
D)
water is denser than oil but less dense than syrup.
Answer:
the answer is d
Explanation:
Jaden listed the similarities of using coal, natural gas, and petroleum to generate electricity. Coal, natural gas, and petroleum: – use turbines – require heat – convert electrical energy to kinetic energy – produce pollution in the form of smoke Which best describes Jaden’s mistake? Only coal-fired power plants use turbines. Power plants do not require heat. Kinetic energy is converted to electrical energy. Coal does not produce pollution.
Answer:
The answer is C. Kinetic Energy is converted to electrical energy
Explanation:
Just took the test
Electric energy is converted to kinetic energy is the mistake that Jaden made in this scenario.
What is Energy?This is defined as the capacity and ability to do work and examples include kinetic, electrical etc.
The kinetic energy through the movement of water by the wind is what powers the turbine to become an electric energy and not electrical energy being converted to kinetic energy.
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ASAP MULTIPLE CHOICE WILL MARK BRAINLIEST
What did Ernest Rutherford's model of an atom look like?
plum pudding
a random mixture of protons, neutrons, and electrons
a single, individual atom
a nucleus surrounded by electrons
Answer:
A single individual atom
Explanation:
The atom has a tiny massive core called the nucleus. It contains positive energy called the protons and negative charge called the electrons. The empty space b/w the nucleus and the electron takes up most of thr volume of the atom.
Please correct me if I'm wrong.
Answer:
A nucleaus surronded by electrons
How do particles in the most rigid state of matter move? A. They stay close together and vibrate in place B. They move freely from one place to another within their container C. They stay close together and slip past one another D. They bounce off one another and the slides of their container
Answer:
A: they stay close together and vibrate in place
Explanation:
assuming the most rigid state would be a solid, thats how particles of a solid move
Answer:
A
Explanation:
particles in the most rigid state (soilds) vibrate on the spot
each particle is attached to several others so they cant move freely
What are the important features of a model of Earth's plates?
Answer:
The main features of plate tectonics are:
Convection currents beneath the plates move the crustal plates in different directions. The source of heat driving the convection currents is radioactivity deep in the Earths mantle.
The important features of earth's plates are seismicity,volcanicity and tectonic activity along plate margins.
What are plate tectonics?It is a generally accepted scientific theory which takes into consideration earth's crust to be made up of tectonic plates. These plates move slowly and are moving since 3.4 billion years ago.
The model is developed on the concept of continental drift .Earth's lithosphere is split up in to seven-eight major plates and many minor plates.The position where plates meet their relative motion determines the plate boundary.
Tectonic plates are made up of lithosphere of ocean and thicker continental lithosphere.These plates are able to move because lithosphere has high mechanical strength.Lateral density variations occurring in mantle cause convection.
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What do animals do with the carbon dioxide produced in their cells during cellular respiration?
A Store it for later use.
B Reuse it during photosynthesis.
C Exhale it in the breathing process.
D Combine it with water to make sugar.
Answer:
c
Explanation:
animals are not plants
Answer:
C Exhale it in the breathing process they release it back
I'm having trouble with my wireless headphones that won't turn on at all it's not blinking why? need help asap.....
Answer:
Try a hard reset: Press and hold both the power button and the volume button (plus the other 2 as well perhaps) for about 10 seconds and then release. Check if the earphones will then either show that they are charging (with the cable inserted of course) or that they will turn on if the Power button is pressed. Explanation:Hope this helped you