Answer:
A manipulated variable is also called an independent variable. A responding variable is a variable that the researcher predicts will change if the manipulated variable changes. A responding variable is also called a dependent variable.
I In a smaller room, such as a bathroom, the reflected sound can reverberate (echo in many directions) off the smooth tile. Why do you think people enjoy singing in the shower?
Answer:
See explanation
Explanation:
It is common knowledge that quite a number of people enjoy singing in the shower. There are reasons for this!
In the shower, there are many surfaces that reflect the sound of your voice as you sing. That makes your voice to sound more powerful and have more volume.
The reverberation of the sound makes the sound of your voice stronger and more intense altogether enriching the music produced as you sing.
Someone please help me with these anything is helpful thanks
Explanation:
1 sulfur dioxide 2 monosulfur dinitride 10 nitrogen dioxide
is mending a broken bone chemical change and why(short answer pls)
Answer:
In a physical change, the substances involved retain their original properties. A new substance is not formed. A physical change can be reversed. Chemical changes happen on a molecular level when two or more substances chemically bond together.
Mending a broken bone is a chemical change as to heal the bone enzymes are released which are chemicals.
What is a chemical change?Chemical changes are defined as changes which occur when a substance combines with another substance to form a new substance.Alternatively, when a substance breaks down or decomposes to give new substances it is also considered to be a chemical change.
There are several characteristics of chemical changes like change in color, change in state , change in odor and change in composition . During chemical change there is also formation of precipitate an insoluble mass of substance or even evolution of gases.
There are three types of chemical changes:
1) inorganic changes
2)organic changes
3) biochemical changes
During chemical changes atoms are rearranged and changes are accompanied by an energy change as new substances are formed.
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4. Which of the following is the best example of increasing an object's potential energy O A rolling a bowling ball B. stretching a rubber band Oc swinging a baseball bat dronning an anno
Answer:
B. Stretching a rubber band.
Explanation:
Calculate the formula mass (Mr) of the compound iron (III) oxide, Fe2O3.
(show working)
Answer:
100
Explanation:
Fe = 26 (look on periodic table)
O = 16
(26×2) + (16×3) = 100
Balance the chemical equation. Based on the equation, how many grams of bromine are produced by the complete reaction of 11 grams of potassium bromide? Use the periodic table to get the weights of the elements. Carry out your calcuation in the same way as you did in parts A, B, and C. That is, begin by converting grams of KBr to moles of KBr, then use the mole ratio of KBr to Br2.
Answer:
Explanation:
The balanced chemical equation is Cl2 + 2KBr → 2KCl + Br2. The amount of bromine is calculated as follows:
11.0 g KBr (1mol KBr/119.002g KBr * 1mol Br2/2mol KBr * 159.808g Br2/1mol Br2= 7.39 g Br2.)
The balanced chemical equation is Cl₂ + 2 KBr → 2 KCl + Br₂.7.39 g of bromine are produced by the complete reaction of 11 grams of potassium bromide.
What is chemical equation?The Chemical equation is a symbolic representation of a chemical reaction is written in form of symbols and chemical formulas.The reactants are present on the left hand side while the products are written on the right hand side of the chemical equation.
A plus sign is written between reactants and products if they are more than one reactants or products in any case and an arrow is present which points towards the product side which indicates the direction of the reaction in which it is proceeding.There are coefficients present next to the chemical symbols and formulas .
The balanced chemical equation is Cl2 + 2KBr → 2KCl + Br2. The amount of bromine is calculated as follows:
11.0 g KBr which is 1 mole of KBr/119.002 g KBr × 1 mole of Br₂/2 mole KBr × 159.808 g Br₂/1 mole of Br₂= 7.39 g Br₂.
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Electromagnetic waves consist of
A. Compressions and rarefactions
B. High-frequency gravitational waves
C. Particles of light energy
D. Vibrating electric and magnetic fields
What happens to the moon every month? Science
Answer:
Every month Earth's moon goes through its phases, waning and waxing in its constant transformation from new moon to full moon and back again. This lunar cycle happens in part because the moon does not produce its own light; the silvery glow we see comes from sunlight reflecting off the moon's monochrome surface.
Draw the Lewis structure for AB4
All living things are made up of molecules that have carbon.
O True
O False
Answer:
True
Explanation:
Because Carbon is the primary component of macromolecules, including proteins, lipids, nucleic acids, and carbohydrates.
Answer:
True!
Explanation:
All living things contain carbon in some form. Carbon is the primary component of macromolecules, including proteins, lipids, nucleic acids, and carbohydrates. Carbon's molecular structure allows it to bond in many different ways and with many different elements. So therefore, its true (:
What kinds of bonds can be found in soap?
Answer:
The chemistry of a soap molecule is such that one end of it has a polar covalent bond, while the tail is make up of carbon and hydrogen atoms that have non-polar bonds.
The nitrogen cycle is the biogeochemical cycle by which nitrogen is converted into multiple chemical forms as it
circulates among atmosphere, terrestrial, and marine ecosystems. Using the model, evaluate each of the claims and
select ALL that are correct.
A)
Bacteria is essential to making nitrogen usable.
B)
Denitrification returns nitrogen to the atmosphere.
09
N2 is the form of nitrogen most used by plants,
D)
Fertilizers containing nitrogen are carried in runoff to lakes and rivers.
Eliminate
19
E)
Nitrogen fixation from lightning returns nitrogen to the atmosphere from
the soil
Answer:
A) Bacteria is essential to making nitrogen usable.
B) Denitrification returns nitrogen to the atmosphere.
D) Fertilizers containing nitrogen are carried in runoff to lakes and rivers.
Explanation:
The nitrogen cycle is the biogeochemical cycle by which nitrogen is converted into multiple chemical forms as it circulates among atmosphere, terrestrial, and marine ecosystems. Thus option A, B and D.
What is nitrogen cycle?Nitrogen cycle is defined as a biogeochemical process that converts inert nitrogen in the atmosphere into a form that living organisms can use.
It can also be defined as a cyclical process in which nitrogen travels through both living and nonliving things,
There are seven steps of nitrogen cycle.
Nitrogen fixationAssimilation AmmonificationNitrificationDenitrificationDissimilatory nitrate reduction to ammoniaAnaerobic ammonia oxidationBiogeochemical cycle is defined as the process by which a chemical substance cycles through Earth's biotic and abiotic compartments.
Thus, the nitrogen cycle is the biogeochemical cycle by which nitrogen is converted into multiple chemical forms as it circulates among atmosphere, terrestrial, and marine ecosystems. Thus option A, B and D.
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What are two ways that convection currents in the oceans distribute the Sun's energy? A. Icebergs are carried from the poles to the equator. B. Warm water is carried from the equator to the poles. C. Living things swim in cool and warm parts of the ocean. D. Nutrient-rich water is brought to the ocean surface
Answer:c
Explanation:
No cap
This question is about energy transfers. Which is the correct definition of conduction.'
(1 Point)
Transfer of thermal energy when particles in a heated fluid rise.
Transfer of thermal energy as a wave.
Transfer of thermal energy by the vibration of particles.
How many moles are contained in 539.2 grams of Al(NO3)3
Answer; 2.531 moles
Explanation:
Which statement is most accurate about energy absorbed and released in this chemical reaction?
pls help im being timed
Mg(OH)2 → MgO + H2O [ΔH = 37.1 kJ]
A. It is an endothermic reaction and energy is released from the system
B. It is an endothermic reaction and energy is absorbed by the system
C. It is an exothermic reaction and energy is absorbed by the system
D. It is an exothermic reaction and energy is released from the system
Answer:
D. It is an exothermic reaction and energy is released from the system
Explanation:
Hope it helps you in your learning process.
To go from grams to moles you will have to multiply the grams by 22.4 true or false
yes you do need to multiply it by 22.4
What does the skeleton do
Explanation:
"The skeletal system works as a support structure for your body. It gives the body its shape, allows movement, makes blood cells, provides protection for organs and stores minerals"
Explain how airbag gets deployed ? Explain the reactions involved?
Answer:
Let’s get back to simple physics and the laws of motion. Your car and everything in it are traveling in a given direction, to stop in requires force be applied in the opposite direction over a period of time. This occurs extremely quickly in an accident and the force is greater because the time the opposing force is acting on the vehicle is very short. The airbag system is designed to offer you protection from the violent forces exerted on you during an accident.
There are three main components to your airbag system, the bag, the inflator and the sensor. The sensor must register a collision force roughly equal to hitting a brick wall at 10 to 15 mile per hour before it will trigger the airbag inflation. Once tripped the airbag system inflates through a chemical reaction between sodium azide (NaN3) and potassium nitrate (KNO3) which creates nitrogen gas. An igniter is set off which quickly burns the chemical fuel and creates the gas needed for expansion. The bag then blows out of its storage in a split-second. Immediately after inflation, when the chemical burn is complete, the airbag begins to deflate as the gasses escape from holes in the fabric.
Explanation:
How do the different processes of a rock cycle change a rock? Which processes will form an igneous, sedimentary, and metamorphic rock
HELP WITH THIS EASY SCIENCE WORK
Answer:(1)The urinary system's function is to filter blood and create urine as a waste by-product.
(2) two kidneys we have.
(3)The kidneys act as very efficient filters for ridding the body of waste and toxic substances, and returning vitamins, amino acids, glucose, hormones and other vital substances.
(4)Two ureters. These narrow tubes carry urine from the kidneys to the bladder. Muscles in the ureter walls continually tighten and relax forcing urine downward, away from the kidneys.
(5)A hollow, muscular, balloon-shaped organ that expands as it fills with urine.
(6)The urethra is the vessel responsible for transporting urine from the bladder to an external opening in the perineum.
(7)Urine is formed in the kidneys through a filtration of blood. The urine is then passed through the ureters to the bladder, where it is stored. During urination, the urine is passed from the bladder through the urethra to the outside of the body.
Explanation:
How does a material get a positive charge?
Answer:
positive charge comes from having more protons than electrons; negative charge comes from having more electrons than protons charge is quantized, meaning that charge comes in integer multiples of the elementary charge e
Explanation:
List four factors that affect precipitation
Topic scowmce
Precipitation.
Humidity is the amount of water vapour in the air. This is produced by the evaporation
of water from oceans, lakes, rivers, wetlands and plants.
When water evapour in the air cools, it condenses. In other words, it becomes liquid and
forms little drops. These droplets form clouds.
When the droplets are small, they remain suspended in the atmosphere. But they often
become colder and their size and weight increases When they become too heavy to
remain suspended in the air, they fall to the Earth’s surface. We call this precipitation,
which may be rain, snow or hail.
Factors affecting precipitation.
Different areas of the Earth’s surface receive different amounts of precipitation.
Latitude: it rain more in the areas near the equator than in the temperature
zones and polar regions. The temperature is higher near the Equator so there is
more evaporation.
Altitude: it rains more in high areas than in low areas.
Level of humidity: it rains more on the coast than inland. Seas are a source of
humidity.
Precipitation is measured in millimeters (mm) per square matre.
Q+ ( poistive ion ) is an ion of element Q.
What has the highest value in the ion?
The proton number has the highest value in the ion
In an atomic element Q, the mass number is the number of the proton and the neutron, the electron encircles around the nucleus of the atomic element.
Recall that:
The electron is usually negatively charged;The neutron is a neutralThe proton is usually positively charged.∴
The atomic element Q+ has a positively charged ion, Thus, the proton number in the mass of the atomic element Q, therefore, has the highest value in the ion.
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Classify the following as elements, compounds and mixtures
Brass, Gold, rainwater, Sodium chloride, distilled water, sugar solution,
copper, Sulphur dioxide, Aluminium oxide, muddy water
Plz i need fast ASAP
Answer:
Elements
Gold, copper
Compounds
Sodium chloride, Sulphur dioxide, Aluminium oxide,
Mixture
Brass, rainwater, distilled water, sugar solution,muddy water
Explanation:
How would an apple, potato, and onion all taste the same?
A) plugging your nose
B) Chewing on mint gum in intervals
C) eating them at the same time
Answer:
a
Explanation:
Answer:
a
Explanation:
Give 2 Examples of gasses
How does environmental changes affect animals?
Environmental changes affect animals depending on their ability to adapt to new conditions.
What is adaptation?An adaptation is any type of phenotypic feature associated with a higher fitness in a particular environment.
Adaptations are features that allow organisms to adapt to challenging environmental conditions.
In conclusion, environmental changes affect animals depending on their ability to adapt to new conditions.
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If 2.5 moles of H2O are needed to be produced, how much H2 will be needed?
Answer: Hope it can help you :)
Explanation:
The volume of a gas is 200mL at 2.0atm. What will it's volume be at 4.0atm?
Answer:
V = 100 ml
Explanation:
P1V1 = P2V2
P1 = 2.0 atm
V1 = 200ml
P2 = 4.0 atm
V2 = ?
(2.0)(200) = (4.0)V2
400 = (4.0)V2
V2 = 100
The new pressure will be
1000 L
, rounded to one significant figure.
Explanation:
Boyle's law states that when a gas is held at a constant temperature and mass in a closed container, the volume and pressure vary inversely. The equation to use is
P
1
V
1
=
P
2
V
2
.
Given
V
1
=
200
mL
×
1
L
1000
mL
=
0.2 L
P
1
=
700 mmHg
V
2
=
100
mL
×
1
L
1000
mL
=
0.1 L
Unknown
P
2
Equation
P
1
V
1
=
P
2
V
2
Solution
Rearrange the equation to isolate
P
2
and solve.
P
2
=
P
1
V
1
V
2
P
2
=
(
700
mmHg
×
0.2
L
)
0.1
L
=
1400 L
, which must be rounded to
1000 L
because all of the measurements have only one significant figure