Based on the results the students record, which group makes the most accurate measurements of the object?
Answers
Answer:
B.
Explanation:
It’s because when you subtract 78.5 and 77.5 you get 1. And when you do 79.5 and 78.5 you get 1 too. I know this because I got the answer right
Related Questions
Select the correct answer.
In which situation is no work considered to be done by a force?
A.
when the angle between the force and displacement is 180°
B.
when the angle between the force and displacement is 90°
C.
when the angle between the force and displacement is 45°
D.
when the angle between the force and displacement is 0°
Answers
Answer:
Explanation:
when the angle between the force and displacement is 0
pls help ill mark as brainliest :)
Q9. NH4OH + HBr H2O + NH4Br
is this combustion, synthesis, single reaction, double reaction, decomposition ?
Answers
Answer:
I think its a double reaction
Explanation:
The millions of fossils that scientists have collected are called the fossil __.
Answers
Answer:
record
Explanation:
With radiocarbon dating, scientists compare an object's carbon-14 levels with _____. the carbon-14 levels of an object from the same time period carbon-14 levels in the atmosphere the carbon-14 levels in the rock surrounding the object the object's carbon-12 levels
Answers
Answer:carbon-14 levels in the atmosphere
Explanation:
When carrying out radiocarbon dating, the level of carbon-14 in a sample is compared with the level of carbon 14 in the atmosphere because, objects exchange carbon-14 with the atmosphere.
Comparison of the activities of carbon-14 in the atmosphere and in the sample gives the age of the sample since the half-life of carbon-14 is a constant.
Calculate the energy of a photon with a frequency of 2.36 x 10-19 Hz.
Answers
Answer:
Explanation:
energy for photon is calculated in same wasy as for electromagnetic radiation
energy for electromagnetic radiation = hf
where f is the frequency of photon
h is Planck's constant = h = 4.14 × 10−15 eV · s.
thus
energy of photon = 4.14 × 10−15 eV · s * 2.36 x 10-19 Hz
energy of photon = 9.77 * 10−(-15+ -19) eV
energy of photon = 9.77 * 10−34eV answer
Burning is a type of_________reaction.
O replacement
O decomposition
O synthesis
O combustion
Answers
Answer:
Combustion
Explanation:
Happy Halloween!
how are subtances dissolved ?
Answers
Answer: A solute dissolves because its particles interact with the particles of a solvent. Anything that allows more solvent to touch more solute will cause a solute to dissolve more quickly. Small pieces of a substance dissolve faster than large pieces.
PE = mgh, solve for m
Answers
Answer:
P.E. = mgh, where m is the mass in kilograms,
Answer:
[tex]m = \frac{PE}{gh} [/tex]
Explanation:
[tex]if \: PE = mgh \\ then \to \\ m = \frac{PE}{gh} [/tex]
♨Rage♨
(b) Define, in terms of oxidation state, the Oxidizing agent
a substance which gains oxygen
a substance whis lose hydrogen
a substance which experiences a decrease in oxidation state
a substance which experiences an increase in oxidation state
Answers
Answer: a substance whis lose hydrogen
Explanation:
the amount of carbWhat is your carbon footprint?
the amount of carbon dioxide you use when recycling
the amount of oxygen put into the atmosphere due to your consumption of fossil fuels
the amount of carbon dioxide and oxygen in the atmosphere at any given time
the amount of carbon dioxide put into the atmosphere due to your consumption of fossil fuelson dioxide put into the atmosphere due to y
Answers
Answer:
D
Explanation:
which of the data sets qualitative data?
Answers
Answer:
any data should work as long as you get the question right it should be all fine if you i had this question once and i different sums of data each or each way i did it.
Choose the coefficient for blank 1 (in front of Rb)
___ Rb + ___ P --> ___ Rb3P
options:
3
1
4
2
Answers
Answer:
3
Explanation:
Step 1: RxN
Rb + P → Rb₃P
Step 2: Balance RxN
We will need 3 Rb's on both sides.
3Rb + P → Rb₃P
Explain why warm air temperature has lower air pressure than cold air?
Answers
Answer:
Differences in temperature cause differences in air density. Warmer air is less dense than cold, which is why warm air tends to rise and cold air sinks.
temparature affects particles. warm particles are more spread out.
Explanation:
. Being acted on by gravity, colder, denser air weighs more and exerts greater pressure per unit area.
IUPAC name for C3H7
Answers
Answer:
propyl
Explanation:
......:)
..;) .........
Sugar is added to iced tea and the contents are stirred until all of the sugar dissolves. How would the tea now be classified?
Answers
I NEED THESE ANSWERED!!! PLEASEEE!!!!!
Answers
A sound wave has a frequency of 20 Hz and a wavelength of 100 m. What is speed of the wave
Answers
The speed of a wave can be calculated using this formula:
v = f x λ
Where:
v is the wave speed in metres per second, m/s
f is the frequency in hertz, Hz
λ (lambda) is the wavelength in metres, m
Calculation:
Given:
f = 20 Hz
λ = 100m
Using the equation:
v = f x λ
v = 20 x 100
v = 2000 m/s
Therfore, the speed of the wave is 2000 m/s
A sound wave has a wavelength of 100 m and a frequency of 20 Hz. The wave's speed is 2× 10^3 m/s.
assuming frequency = 20 Hz and wavelength = 100 m
utilized concept: v= = 20×100 = 2×10³ m/s
Why is frequency important?The frequency in physics is the quantity of waves passing a fixed location in a unit of time. It also indicates how many cycles or vibrations a body in periodic motion experiences in a given unit of time.
How would you define sound?A sort of energy created by vibrations is sound. The molecules of the air surrounding an item vibrate as a result.. These molecules vibrate because they collide with nearby molecules, which also vibrate as a result.
To know more about Frequency, visit-
https://brainly.com/question/14316711
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a piece of metal has a mass of 1.3 g/cm and a has a volume of 24.9 cm3 what is its mass
Answers
Answer:
34.611g
Explanation:
mass of metal = ?
density of metal = 1.39/cm³
volume = 24.9 cm³
density = mass/volume
mass = density × volume
= 1.39g/cm³ × 24.9 cm³
= 34.611g
A metal sample weighs 56.8 grams. How many ounces does this sample
weigh? (1 lb = 16 oz)
Answers
Answer:
2 oz. just multiply 56.8 with 0.03527
Explanation:
What is 8S8
In need for a quick answer
Answers
Answer:
8x8 Inc. is a provider of Voice over IP products. 8x8 products include cloud-based voice, contact center, video, mobile and unified communications for businesses.
Explanation:
A substance absorbed 895 J and caused its temperature to increase by 10 ºC. If the substance has a mass of 27.9 g, what is the substance's specific heat in J/(gºC) ?
1.) 3.21
2.) 4.62
3.) 1,406.25
4.) 249,705
Answers
Answer:
i dont get the equation sorry wish i can help
Which of the following properly explains what takes place when light hits polarized film?
A) The intensity of the light is simply dimmed
B)The planes of light become scattered
C)The scattered light has either the horizontal plane or the vertical plane blocked
D)The intensity of the light is brighten
Answers
Answer:
C)The scattered light has either the horizontal plane or the vertical plane blocked
Explanation:
When light becomes plane polarized, it means that light is made to vibrate in only one plane.
Light usually vibrate in vertical and horizontal directions but when light becomes polarized, either the vertical or horizontal direction is blocked and it is made to vibrate in only one direction
Select the correct answer
Which statement best supports the idea that water conservation is important for human societies?
OA Once humans use water, it cannot be reused ever again,
OB. Only about 1% of the freshwater on Earth is easily accessible.
OC Water is constantly being lost from the hydrosphere
OD. Most land animals use salt water instead of freshwater.
Answers
Answer:
Only about 1% of the freshwater on Earth is easily accessible.
Explanation:
Freshwater accounts for a minimal proportion of water resources on planet earth. About 70 percent of the world surface area is covered by water, but only about 2.5 percent of this mass of water is fresh. The remaining are marine or salt water. Amazingly, just about 1 percent of this freshwater is easily accessible. The other 1.5% is trapped in glaciers and snowfields.
This underscore the need for water conservation on the planet since fresh water is a scarce resource and people living in many areas have no access to fresh water.
What is involved in weathering?
Answers
Answer:
the answer is water.Hope this helps
1. True or False? The scientific method is defined as a method of research
in which a problem is identified, data is gathered, and a hypothesis is
created based off the data, then the hypothesis is tested.
Answers
Answer:
true
Explanation:
please mark BRAINLIEST
Which option is an example of a chemical property?
A. boiling point
B. ability to react with oxygen
C. color
D. density
Answers
Answer:
boiling point
Explanation:
Option B
What is the product of Na +CaSO4,
Answers
Answer:
Na + CaSO4 = Na2SO4 + Ca
Explanation:
single displacement (substitution)
what is the concept of the doppler effect?
Answers
how this is helpful!!!!
need help asap
Calculate the frequency for a wavelength of 635 nm.
Answers
Answer:
472114107.086614 MHz
Explanation:
f = C/λ
λ: Wavelength in meters
C: Speed of Light (299,792,458 m/s)
Protons have about the same mass as:
A. plasma particles
B. neutrons
C. electrons