Answer:
6%
Explanation:
Actual length of the wood is 2.5 m
Observed length of the wood is 2.35 m
We need to find the percent error of your measurements. The formula of the percentage error is given by :
[tex]\%=\dfrac{|\text{observed-actual}|}{\text{actual}}\times 100\\\\\%=\dfrac{2.5-2.35}{2.5}\times 100\\\\\%=6\%[/tex]
Hence, the percentage error is 6%.
Which Statement correctly describes protons
A.They no charge and are present in the nucleus of an atom.
B.They have a negative charge and travel around the nucleus
C.They have a positive charge and travel around the nucleus of an atom
D. They have a positive charge and are present in the nucleus of an atom along with the neutrons
Answer:
D.
They have a positive charge and are present in the nucleus of an atom along with the neutrons.
explanation:
Protons have a positive charge.
Match the following properties with the type of property they are (chemical or physical) or the type of change the substance is undergoing (chemical or physical).
reacts with base-
smell-
color-
boiling point-
fruit rotting-
dissolving kool-aid powder-
reacts with water-
iron rusting-
water freezing-
1.
Chemical Property
2.
Physical Property
3.
Chemical change
4.
Physical change
Answer:
Chemical property
Iron rusting Fruit rottingPhysical property
Boiling point Water freezingChemical change
React with waterReact with basePhysical change
Color SmellWhich of the following is an element? aluminum bronze table salt brass
Answer:
Aluminum is an element
Explanation:
Aluminum is the most abundant metal in the earths crust with an atomic number of 13.
3. The ratio of an object's mass to its
is called the density of the object.
Answer:
The ratio of an object's mass to its volume is called density of an object
Explanation:
Density=mass/volume
Caves are formed by: i)solution ii)oxidation iii)carbonation iv)hydration
Answer:
i think its oxidation
Explanation:
Which acid
is synthetic and not found in
nature?
Answer:
because acids come from various chemical substances
Tertiary or top consumers are animals at the top of the food web. They may feed off either primary or secondary consumers. What animals would fit into this classification?
Answer:
Coyotes, Bald Eagles, & Gray wolf.
carbon dioxide is a compound why
Answer: CO2 is a type of compound because it consists of multiple elements such as oxygen and carbon.
Answer:
Carbon dioxide is a compound because it contain more than one type of elements, carbon and oxygen, which are chemically bonded.
I have no clue on what to do
Answer:
A.
Explanation
Because it is totally irrelevant to what the question is asking.
Consider a sealed glass bottle. If the bottle is thrown into a fire, what will happen to the bottle and why? Which law is the best explanation?
Answer:
Charles' Law
Explanation:
If a sealed container of gas were placed in a fire, the temperature and pressure of the gas would increase until the container broke or exploded. ... to volume when temperature is constant.
In the case when the bottle should be thrown into the fire so here Charles' Law should be applied.
What is Charles' Law?Charles's law is a statement where the volume should be occupied by a fixed amount of gas that should be directly proportional to its absolute temperature in the case when the pressure remains constant.
Since in the case when the sealed container of gas should be placed in the fire so here the temperature and the pressure should be increased till the break of the container.
Learn more about temperature here: https://brainly.com/question/17427955
How did the atom model change
Answer:
Neil's Bohr improved Rutherford's model.
Explanation: I hope this helps! :)
true or false
The atomic number of an element can be used to find the number of protons and neutrons in a neutral atom
Two objects are moving in a straight line. One object has a faster speed than the other. They both have constant speeds (speed is not changing). Is either object accelerating?
Answer:
No
Explanation:
Acceleration refers to the increase in speed over time. Since both of the objects are moving at a constant speed (so the speed is not changing) neither are accelerating, because acceleration requires a positive change in speed.
They may be moving at different speeds, one faster than the other, but neither are changing their own speed so neither are accelerating.
Hope this helped!
1. A 205 g sample of H20 at 25.0 °C is heated until the temperature reaches 75.0 °C. How many
Joules of heat were required to do this? (remember c = 4.184J/g • °C)
Answer:
i really dont know
Explanation:
byeeeeeeeeeeeee
Predict the empirical formula of the ionic compound that forms from aluminum and oxygen.
A. AIO.
B. Al2O.
C. Al2O3.
D. Al3O2.
E. AlO2.
Answer:
A. AlO
Explanation:
The empirical formula of a compound is the simplest possible formula giving the ratio of atoms in a molecule of the compound.
We know that Aluminium forms [tex]Al^{3+}[/tex] and oxygen forms [tex]O^{2+}[/tex].
As such the formation of the ionic compound between a metal and non-metal results into [tex]Al_2O_3[/tex].
The empirical formula is as follows:
Element Aluminium Oxygen
% composition
by mass 26.98 16.0
mole ratio 26.98/26 16/16
= 1.04 = 1
divided by the
smallest number 1.04/1 1/1
1.04 1
The empirical formula is AlO
How do you convert 8.5600x[tex]10^{2}[/tex] from scientific notation to standard notation?
Answer:
856.00
Explanation:
just move the decimal two places to the right :)
What is the volume of as sample that has a mass of 40.0 g and a density of 4.30 g/mL?
Explanation:
density = mass/volume so volume = mass/density = 40/4.30
PLEASE HELP
what determines an elements properties?
A. the valence electrons
B. its atomic mass
C. the core electrons
D. the isotopes it forms
Answer:
A
Explanation:
Answer:
A. the valence electrons
Explanation:
Which of the following is a unit of mass in the metric system? (4 points)
Gram
Ounce
Pound
Ton
Question 2
Which phrase best describes an apple?
O homogeneous compound
O heterogeneous substance
O homogeneous mixture
O heterogeneous mixture
Answer:
an apple is best described as a heterogeneous mixture.
The phrase that best describes an apple is heterogenous mixture because it is made up of a different materials.
What is a mixture?A mixture is combination of different components that can be uniform or dispersed and homogenous or heterogenous. A homogenous mixture is the one in which the two or more components are dissolved together to form only one phase.
A heterogenous mixture is composed different phases with uniform or irregular arrangement of materials. Heterogenous mixtures look like a nonseparated random particles which are clearly distinguishable by eyes.
Apple is not a compound but is a mixture made up of different components such as water, pulp, seeds, pigments etc. and each forms their own phases.
Hence, Apple can be termed as a heterogenous mixture.
To learn more about homogenic mixture, find the link below:
https://brainly.com/question/1970755
#SPJ5
Based on what you observed, what ideas do you
have about the missing piece? What can you
visualize about the missing piece?
And experiment a student measures the speed of a toy car locations K through N as it rolls down a ramp based on the data collected in the table exclusion was shown by the student that the unbalanced forces acting on the toy car affect its average speed what reasoning lead to the interpretation of this data and conclusion
Answer:
B) The average speed of the car increases as distance traveled increases.
Explanation:
The unbalanced forces acting on the toy car affect its average speed, The average speed of the car increases as distance traveled increases. Therefore, option A is correct.
What do you mean by an average speed ?The term average speed is defined as the total distance traveled by the object in a particular time interval. The average speed is a scalar quantity. It is corresponded to the magnitude and does not have direction.
Average speed is calculated by dividing the total distance something travels by the total amount of time it spends traveling.
Average speed = Total distance covered / Total Time. The S.I. unit of speed is meter per second.
The unbalanced forces acting on the toy car impact its average speed, The average speed of the car increases as distance traveled increases.
Thus, option A is correct.
To learn more about the average speed, follow the link;
https://brainly.com/question/12322912
#SPJ6
Your question is incomplete, most probably your question was
And experiment a student measures the speed of a toy car locations K through N as it rolls down a ramp based on the data collected in the table exclusion was shown by the student that the unbalanced forces acting on the toy car affect its average speed what reasoning lead to the interpretation of this data and conclusion
A.The average speed of the car increases as distance traveled increases.
B.The average speed of the car decrease as distance traveled increases.
C.The average speed of the car decreases as distance traveled decreases.
D. The average speed of the car increases as distance traveled decreases.
The picture represents sulfur trioxide which statement is true for one molecule of sulfur trioxide? A there are three atoms of sulfur and one atom of oxygen B there are three atoms of sulfur and three atoms of oxygen C there is one atom of sulfur and one atom of oxygen D there is one atom of sulfur and three atoms of oxygen
Answer:
The correct answer is D
Explanation:
I took the test and got i correct. :) have a good day!
Andrew walks through his garden and observes that the shapes of dewdrops are not always the same. Suppose he wants to investigate using the scientific method. Which questions are testable questions that he can ask to look into the reasons for the different shapes?
Answer: A, C, E
Explanation: PLATO. all testable questions.
What word starting with “J” was a period that dinosaurs existed within?
Answer:
Jurassic period
Hope this helps!
How many seconds are in .079 years? (conversation factors)
Answer:
2491344 seconds
Explanation:
By the way Google has a conversion system just in case you want to use it. Just google time conversion. It also does other types of conversion like Volume and Weight.
Please help Which of the following is the SI unit used to measure length? a.kilogram b.liter c.meter d.Kelvin
A. kilogram is the SI unit used to measure mass of body.
1 kilogram = 100 gramB. litre is the SI unit used to measure volume of substance.
1 litre = 10ˉ³ m³C. meter is the unit used to measure length of body.
1 meter = 100 centimetersD. Kelvin is the unit used to measure temperature of body.
1 K = -273.15 °CHence, (B) is the correct answer!
Cheers!
How do I convert 3.221×10^−3 mm to standard notation
Answer:
0.003221
Explanation:
When we multiply anything by 10 times a power, we follow the base 10 decimal system.
To convert 3.221 × 10⁻³ from scientific notation to standard notation, simply move the decimal place 3 places to the left:
3.221 × 10⁻³ = 0.003221
The density of lead is 11.342 g/cm 3 . What would be the volume of a 200.0 g sample of this metal?
Answer:
The answer is
17.63 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 of lead = 200 g
density = 11.342 g/cm³
It's volume is
[tex]volume = \frac{200}{11.342} \\ = 17.6335743...[/tex]
We have the final answer as
17.63 mLHope this helps you
I really need help
Christina is so excited about her wedding that she tells her coworker Meredith it is exactly 43,200 minutes away. Help Meredith figure out how many days away the wedding is so that she can add it to her calendar.
Answer:
30 days
Explanation:
43200÷1440 ( minutes in a day)
the anwer will came after cutting out is 30 which means 30 days
plz mark me brainleast