Answer:
The glow stick in hot water will be brighter
Explanation:
The glow stick in hot water will be brighter than the glow stick in cold water because the heat from the hot water will cause the molecules in the glow stick to move faster. The faster the molecules move in the glow stick, the sooner and brighter the reaction will be. The cold water will cause molecules to move slowly and it will take longer for the reaction to occur, which will also make it less bright.
Answer:
The glow stick that was in the cup of hot water will be brighter once it is bent. The production of more light is evidence that the chemical reaction in the glow stick is happening faster. The reaction happens faster, because increasing the temperature increases the rate of a chemical reaction.
Explanation:
Just took assignment
What is the melting point of the above substance?
Make a claim describing the relationship between Force and charge.
Answer:
According to Coulomb, the electric force for charges at rest has the following properties: Like charges repel each other; unlike charges attract. Thus, two negative charges repel one another, while a positive charge attracts a negative charge. The attraction or repulsion acts along the line between the two charges
Choose all the answers that apply.
What are the habits of mind that a scientist must possess?
creativity
skepticism
artistic ability
reasoning
bias
Answer:
Creativity
Skepticism
Reasoning
Explanation:
Scientists must see a creative way to solve problems in the world. Scientists must also be skeptic about what is said, because if they were not, no one would disagree and the problems would never be solved. Reasoning is a must, as reasoning is involved in the scientific process and writing conclusions to their studies.
Hope this help!
The Earth is always _______ as it revolves around the sun.
Fill in the blank
Get Brainliest if correct.
Answer
Rotating
Explanation:
The Earth is always being pulled towards the Sun by gravity.
The Earth is not moving fast enough to "escape" the Sun's gravity and leave the solar system, but it is going too fast to be pulled into the Sun. Therefore, it keeps going around and around( roating)- orbiting the Sun.
Answer:
Rotating around the sun
Boat A and Boat B have the same mass. Boat A's velocity is three times greater than that of Boat B. Compared to the
kinetic energy of Boat B, the kinetic energy of Boat A is
O one-third as much.
3
O three times as much.
O six times as much.
O nine times as much.
Answer:nine times as much
Explanation:
Answer: 9x as much
Explanation:
which phrase describes a gas?
Answer:
Gas is a state of matter where particles flow freely. It has no definite shape or volume.
Explanation:
How does the average reaction rate differ from an instantaneous reaction rate?
Answer:
The average rate is the change in concentration over a selected period of time. It depends on when you take the measurements. The instantaneous rate is the rate at a particular time.
Explanation:
When a candle burns it produced 41,300 Joules per 1 gram. Use dimensional analysis to convert this to Calories per pound.
1 cal = 4.184 J
16 ounces = 1 pound
1 ounce = 23.5 grams
1 Calorie= 1000 calories
Answer:
4477381.7 calories/pound
Explanation:
It is given that,
When a candle burns it produced 41,300 Joules per 1 gram.
We need to convert it into calories per pound.
We know that,
1 cal = 4.184 J
⇒ 1 J = (1/4.184) cal
1 pound = 453.592 grams
⇒1 g = (1/453.592) pounds
Now,
[tex]41300\ \text{Joules per gram}=\dfrac{41300\ \text{Joules}}{\text{gram}}\\\\=41300\times \dfrac{\dfrac{1}{4.184}\ \text{calories}}{\dfrac{1}{453.592}\ \text{gram}}\\\\=4477381.7\ \text{calories/pound}[/tex]
Hence, 41,300 Joules/gram = 4477381.7 calories/pound.
Find the volume of a gold ring that has a mass of 12.00 grams. The density of gold is 19.30 g/mL. The volume is
Answer:
The answer is 0.622 mLExplanation:
The volume of a substance when given the density and mass can be found by using the formula
[tex]volume = \frac{mass}{density} \\ [/tex]
From the question
mass = 12 g
density = 19.30 g/mL
We have
[tex]volume = \frac{12}{19.30} \\ = 0.62176165...[/tex]
We have the final answer as
0.622 mLHope this helps you
For each compound, write the cation and anion with the appropriate charge. Then write the chemical formula for each compound.
Example: sodium fluoride: Na+1, F-1 NaF
a. Magnesium oxide
b. Strontium iodide
c. Aluminum chloride
d. Calcium phosphide
Answer:
Magnesium oxideStrontium iodideAluminum chlorideCalcium phosphide5% and NanO2 Cax[tex]x^{2}[/tex]
A car traveling at a constant speed of 75 miles/hr for 7.5 hours will go how far?
a
10 miles
562.5 miles
b
O.c
Od
751.5 miles
199 miles
Answer:
The answer is 562.5 milesExplanation:
The distance covered by an object given it's velocity and time taken can be found by using the formula
distance = velocity × time
From the question we have
distance = 75 × 7.5
We have the final answer as
562.5 milesHope this helps you
what is balance equation
Answer:
Balanced equations are those whose coefficients result in equal numbers of atoms for each element in the reactants and products.
Which statement best describes the atoms of the gas neon?
They slide past each other.
They move freely in all directions.
They vibrate in place.
They are packed closely together.
Answer:
B. They move freely in all directions.
Explanation:
i got it right on my test on edge
Answer:
B. They move freely in all directions.
Explanation:
I need help please answer
Where do the glucose molecules that our cells need come from?
Answer:
glucose molecules that our cells need from is plants
how is plastic made?
Answer:
Cellulose, Coal, Natural Gas, Salt, and Crude Oil
what is magnetism? please answer
Answer:
a physical phenomenon produced by the motion of electric charge, resulting in attractive and repulsive forces between objects.
:0
Explanation:
Answer:
Explanation:
Magnetism is the power to attract. It refers to the attraction to iron and other metals in electric currents and magnets, or to the other kind of attraction — where people want to be close to each other.
plz mark as brainliest
Can someone please help me with this
Answer:
b Mass +1 charge 0
Explanation: protons are neutral, so neutrons do not have charge
If an atom has 56 protons and 58 neutrons, how many electrons
would this atom have?
Because the protons = the electrons so the atom will have 56 electrons.
This atom would have 56 electrons.
Atomic Structure:
In a neutral atom, the number of protons and number of electrons are same which is equal to the atomic number of an atom.The mass number of the atom (M) is equal to the sum of the number of protons and neutrons in the nucleus.So, it is given that;
Number of protons=56
Number of neutrons=58
Thus, number of electrons=56 (since, the number of protons and number of electrons are same)
Learn more:
brainly.com/question/18320794
What is the correct electron configuration for the ion K+?
1s22s22p63s23p6
1s22s22p63s23p64s1
1s22s22p63s23p64s2
1s22s22p63s1
Answer:
1s22s22p63s23p6
Explanation:
The electronic configuration of K is 1s22s22p63s23p64s1.To form K+1 we remove electron. Thus the electrons configuration of K +1 is 1s22s22p63s23p6.
Hence answer is option A
A student is participating in the school science fair. She wants to investigate household cleaners.
Which question can she best answer through scientific investigation?
A. Which household cleaner is most effective at removing stains?
B. Which household cleaner smells the best?
C. How often should a person use household cleaners?
D. Where should a person buy household cleaners?
Answer:
A
Explanation:
Is this a balanced chemical equation?
Define the law (Principle) of Uniformitarianism
Answer:
known as the Doctrine of Uniformity or the Uniformitarian Principle, is the assumption that the same natural laws and processes that operate in our present-day scientific observations have always operated in the universe in the past and apply everywhere in the universe.
Explanation:
if the density of a bar of gold is 19.3g/cm^3and you cut it into four pieces , what is its density of each piece of gold
Considering the definition of density and intensive and extensive properties, the density of each piece of gold is 19.3 [tex]\frac{g}{cm^{3} }[/tex]
Density is defined as the property that matter, whether solid, liquid or gas, has to compress into a given space. In other words, density is a quantity that allows us to measure the amount of mass in a certain volume of a substance.
Intensive properties are those that will remain unchanged even though the amount of matter varies, while extensive properties vary depending on the amount of matter in a body.
Density is an intensive property, so it is independent of the sample size. This is because the solute will be present in a certain proportion with respect to the solvent. That ratio will not change unless more solute or more solvent is added. Consequently, the concentration remains constant (concentration is an intensive property) and density too.
Finally, the density of each piece of gold is 19.3 [tex]\frac{g}{cm^{3} }[/tex]
Learn more about density:
brainly.com/question/952755?referrer=searchResults brainly.com/question/1462554?referrer=searchResults
Based on the three formulas shown, use one of them to solve for the purple yellow and red box and explain how you did it.
P = 11.133 atm (purple)
T = -236.733 °C(yellow)
n = 0.174 mol(red)
Further explanationSome of the laws regarding gas, can apply to ideal gas (volume expansion does not occur when the gas is heated),:
Boyle's law at constant T, P = 1 / V Charles's law, at constant P, V = T Avogadro's law, at constant P and T, V = nSo that the three laws can be combined into a single gas equation, the ideal gas equation
In general, the gas equation can be written
[tex]\large {\boxed {\bold {PV = nRT}}}[/tex]
where
P = pressure, atm
V = volume, liter
n = number of moles
R = gas constant = 0.08206 L.atm / mol K
T = temperature, Kelvin
To choose the formula used, we refer to the data provided
Because the data provided are temperature, pressure, volume and moles, than we use the formula PV = nRT
Purple box
T= 10 +273.15 = 373.15 K
V=5.5 L
n=2 mol
[tex]\tt P=\dfrac{nRT}{V}\\\\P=\dfrac{2\times 0.08205\times 373.15}{5.5}\\\\P=11.133~atm[/tex]
Yellow boxV=8.3 L
P=1.8 atm
n=5 mol
[tex]\tt T=\dfrac{PV}{nR}\\\\T=\dfrac{1.8\times 8.3}{5\times 0.08205}\\\\T=36.42~K=-236.733^oC[/tex]
Red boxT = 12 + 273.15 = 285.15 K
V=3.4 L
P=1.2 atm
[tex]\tt n=\dfrac{PV}{RT}\\\\n=\dfrac{1.2\times 3.4}{0.08205\times 285.15}\\\\n=0.174~mol[/tex]
13. Identify the state(s) of matter described by each statement.
a. has a definite volume
b. has a definite shape
c. completely fills any container
d. flows
e. is made of particles held together in a rigid structure
f. is made of particles that are close together
Answer:
A: solid and liquid
B: solid
C: gas
D: liquid and gas
E: solid
F: solid
Which of the following types of soil has the greatest permeability?
A. Loam
B. Sandy
C. Clay
D. Silty
Answer:
Sandy soil
Explanation:
Sandy soil has the greatest permeability of all soil types. It has a high amount of pore space and grain size.
Permeability is the ability of fluids to pass between the grains of a substance, here soil. It is usually a function of the size of the pore spaces and the grain size.
Sandy soils are usually made up of particles with sand-sized shapes and dimension. They have bigger and finer grains with little to no cement. This allows for a high level of permeability with no impediment to flow.Clay soil has very fine grain and with very low permeability. Silty soils have fair enough permeability and the permeability of loam straddles between that of sand and clay.Permeability is very important for determining the quality of soils.
50 Points!! 25 Each Points Please Help ASAP!! View Attached Image!! Will Mark Brainliest If All Are Answered!!
Answer:
f
a
c
e
b
reactant
b
f
a
e
d
c
b
Explanation:
Which is the jellylike substance within cells? plasma membrane DNA cytoplasm ribosomes
Answer:
Cytoplasm is the semi fluid gel like substance of a cell that is present within the cellular membranes and surrounds the nucleus.
Explanation:
Hope this helps :)
Answer:
cytoplasm is correct
Explanation:
i took the test
help its due soon i need to get this right to pass the class
Answer:
the answer I am pretty sure is A
Explanation:
Because the way that a generator works is moving electric current around a wire and using magnets to make more energy. please tell me if I am wrong.
Answer: A
Explanation: Because the way that a generator works is moving electric current around a wire and using magnets to make more energy.
The following data was collected: 5.5 m; 5.3 m; 5.4 m. The actual length is 5.4 m. What is the accuracy and precision for this set of measurements?
Answer:
The measurement is precise and accurate
Explanation:
The accuracy of a measurement of length is often indicated by how "precisely" the length measurement can be read depending on the type of measuring instrument used scale.
Looking at the measurement, we can see that the values lie between ±0.1 from the expected values hence it is accurate.
Also, the values differ from each other by ±0.1 hence it the measurements are precise.
Answer:
Accuracy:
5.5 = 98.15%
5.3 = 98.15%
5.4 = 100 %
Precision:
5.5 ± 0.14
5.3 ± 0.14
5.4 ± 0.14
Explanation:
Accuracy is determined using; 100% - % error
% error = absolute error/actual value * 100%
5.5 - 5.4/5.4 * 100% = 1.85%
accuracy = 100 % - 1.85 % = 98.15%
5.3 - 5.4/5.4 * 100 5 = 1.85%
accuracy = 100 % - 1.85 % = 98.15%
5.4 - 5.4/5.4 * 100 % = 0 %
accuracy = 100 % - 0% = 100%
Precision is determined by obtaining the standard deviation of the mean;
s = √{∑(|x - m|)²/(n - 1)}
where x is the value, m is mean of values , n is number of values
mean = (5.5 + 5.3 + 5.4) / 3 = 5.4
deviations from mean, (x - m) are as follows;
|5.5 - 5.4| = 0.1
|5.3 - 5.4| = 0.1
|5.4 - 5.4| = 0
∑(x - m)² = (0.1 + 0.1 + 0) ²= (0.2)² = 0.04
(n - 1) = 3 - 1 = 2
s = √(0.04/2)
s = ± 0.14
Therefore, the precision of each measurement is as follows;
5.5 ± 0.14
5.3 ± 0.14
5.4 ± 0.14