Which of the following properties can be used as evidence a chemical reaction has occurred? (Select all that apply)
a. Density change
b. Melting point change
c. odor change
d. Color change
Is this true or false?
yes its true
as from both parents only one type of allele is passed i.e T
Only about half of the Sun’s energy that reaches Earth is absorbed. The rest is reflected back into space. Which surface is LEAST likely to absorb solar energy and why?
Select one:
a. rock, because it is solid
b. snow, because it is white
c. water, because it is liquid
d. asphalt, because it is black
Answer:
SNOW
Explanation:
It can melt, not a solid, not dark colored, does not move constantly
what is the radioactive nucleus before it decays
Answer:
Alpha decay is one type of radioactive decay, in which an atomic nucleus emits an alpha particle, and thereby transforms (or "decays") into an atom with a mass number decreased by 4 and atomic number decreased by 2.
Explanation:
What is the basic building block of all pure substances that make up matter in the world? A. atoms B. cells C. compounds
Answer:
a) Atoms
Explanation:
How are strato volcanoes different from shield volcanoes?
Strato volcanoes are more explosive than shield volcanoes.
Strato volcanoes are only found by oceans and shield are not.
Shield volcanoes are always larger than strato volcanoes.
Shield volcanoes only produce ashes and strato volcanoes only produce lava.
Answer:
b
Explanation:
i got it right on USA Test prep
Warm air masses tend to originate from:
Question 2 options:
an area where it's summertime
polar areas
tropical areas
an area where it's wintertime
Answer:
area where it's Summertime and tropical areas
Explanation:
In the diagram below, the letters A, B and C represent three identical satellites and their relative distances from Earth.
A bc its the closest to earth
B bc its btw 2 satellites
C bc its the furthest from earth
D bc all of the satallites will feel the same pull from gravitys earth
Answer:
C bc its the furthest from earth
Explanation:
5. Name five plants and animals that lived in ancient Antarctica
Answer:
Two hundred million years ago, Antarctica was a lush, temperate rainforest home to crocodile-sized amphibians and rhinoceros-sized dinosaurs.
Explanation:
Animals:
1 ankylosaurs (the armored dinosaurs), mosasaurs and plesiosaurs (both marine reptilian groups).
2 Cry-oloph-os-auru-s was the ap-ex pre-da-tor of its region when it hunted in the lands of Jur-as-sic Period Antarctica.
3 plesiosaurs.
4 mosasaurs.
Plants:
1 palm trees.
2 ferns and Tanglefoot.
3 Evergreen trees
4 Glossopteris
How do the properties of each of these materials vary? Paper and Cardboard, Plastic, Wood, Metals
PLEASE HELP NOW
The properties of all of these material vary from each other. Paper, cardboard and plastic are insulators and metals and conductors. Each of them has different physical properties.
What are physical properties ?The physical properties of a substance include properties which changes its physical structure, size, shape, phase etc. Solubility, conductivity, resistance etc. are also physical properties.
Here, paper, cupboard and plastic are insulators and they does not conduct electricity. Whereas, metals are very good conductors and they have wide range of applications in optoelectronic devices.
Each of these materials has different melting temperature and different uses. Their density also vary significantly. The paper is the less dense one here and metals are denser.
The applications of these materials are based on their physical properties.
Find more on physical properties:
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What is the charge on the Cr in Cr2O72-
Answer:
+6.
Explanation:
So, a chromium atom here has an oxidation number of +6.
Choose the five physical tests for identifying rocks:
metamorphic
sedimentary
color
streak
hardness
luster
igneous
cleavage
Max and Jimmy want to jump on a trampoline. Max begins jumping in a steady pattern, making small waves in the trampoline. Jimmy starts jumping on the trampoline too. Suddenly, Max goes twice as high even though he did not put any extra effort into jumping.
What type of wave interaction is this? Explain how it occurred.
Answer: The wave interaction described in the scenario is known as constructive interference.
Explanation:
Constructive interference occurs when two waves meet and combine in such a way that their amplitudes add up, resulting in a larger wave. In this case, Max's steady pattern of jumping creates small waves on the trampoline, with a certain amplitude.
When Jimmy starts jumping on the trampoline, his waves combine with Max's waves. If the peaks and troughs of both waves align perfectly, they will add up, resulting in a wave with a larger amplitude. This alignment of peaks and troughs leads to constructive interference, causing Max to go twice as high without any additional effort.
The reason behind this phenomenon lies in the nature of waves. When waves meet, their amplitudes can either add up or cancel out, depending on their relative positions. In the case of constructive interference, the peaks of one wave align with the peaks of the other wave, and the troughs align with the troughs, resulting in an increased amplitude. Conversely, in destructive interference, the peaks align with the troughs, leading to a cancellation or reduction in amplitude.
So, in the scenario, Jimmy's waves align with Max's waves in such a way that their amplitudes combine constructively, resulting in Max going twice as high on the trampoline without exerting any extra effort.
An autopipette was used to place 5.00 mL of commercial bleach, weighing 5.560 g, into a volumetric flask. It
was then diluted to a total volume of 50.00 mL. A 10.00-mL sample of the diluted solution was placed in an
Erlenmeyer flask. What is the mass, in grams, of commercial bleach in the 10.00-ml sample of the diluted
solution in the Erlenmeyer flask?
Answer:
1.112 grams
Explanation:
The mass of commercial bleach in the 10.00 mL sample of the diluted solution in the Erlenmeyer flask would be 1.112 grams.
5.00 mL containing 5.560 g of bleach was diluted to a total volume of 50.00 mL. This means that there is 5.560 g of bleach in the 50.00 mL of the diluted sample. 10.00 mL was taken out of the 50.00 mL dilution:
50.00 mL contains 5.560 g of bleach
10.00 mL of the sample will, therefore, contain:
5.560 x 10.00/50.00 = 1.112 g
10.00 mL of the sample will contain 1.112 g of bleach.
need a answers right away
What conditions are needed for germination? (2 points)
a
Air, water, and warmth
b
Cold air, water, and soil
c
Water, warmth, and a good location
d
Warmth, water, and wind
Answer: A
Explanation:
To germinate, seeds require the right combination of temperature, oxygen, and water. Some seeds also need the right kind of light. Some seeds grow more effectively in direct sunlight, while others need shade to grow.
Select the correct scientific notation form of this numeral using only 3 significant figures. 8,468 L
Answer:
8.47 x 10^3
Explanation:
So since we only want 3 sig figs we have to round our last digit up and then it is 10^3 because we moved the decimal place to the left 3 times to get 8.47
Comment if you have any other sig fig questions, happy to answer them!
which phrase describes air pressure O decreases with denser air O decreases as altitude decreases O equals mass divIded by Volume O decreases as a result of fewer air particles pushing down
Air pressure decreases as altitude decreases. This phenomenon occurs because the atmosphere's density diminishes with increasing height above the Earth's surface and the correct option is option 2
As one ascends to higher altitudes, there are fewer air particles above, leading to a decrease in air density. Consequently, the pressure exerted by the air decreases at higher elevations.
Conversely, at lower altitudes, the air is denser due to the larger number of air particles above, resulting in higher air pressure. This relationship between air pressure and altitude is crucial for understanding weather patterns, climate changes, and the functioning of various natural processes on Earth.
Thus, the ideal selection is option 2.
Learn more about Air pressure, here:
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scientists are certain that there are no undiscovered elements missing from the periodic table from hydrogen to lawrencium.
Explain why.
Answer:
Because no free places exist known and the succession of elements in the periodic table is very rational explained: increasing of number of electrons with 1, spectral data, chemical properties similarities
Explanation: i just did the test
Answer:
Explanation:
You are talking about the first 103 elements. An element is by definition identified with the number of protons in its nucleus, the so-called atomic number. Any atom with 6 protons is carbon, it cannot be anything else. So there cannot be any missing elements out to 103, as all of these elements have been confirm discovered by accepted scientific methods.
For example, here is a link to a CHEM Study film showing how transuranium elements (i.e. atomic number > 92 and man-made) can be separated from one another and verified as distinct.
What is an ellipse please help)
In mathematics, an ellipse is a plane curve surrounding two focal points, such that for all points on the curve, the sum of the two distances to the focal points is a constant. As such, it generalizes a circle, which is the special type of ellipse in which the two focal points are the same.
Maybe they might use that math thing for Science.
7: How many times can a volcano erupt?
Answer:
Some small volcanoes only erupt once in their lives,
while other volcanoes erupt multiple times. Kilaeua volcano in Hawaii, which has been erupting continuously since 1983, is the world's most active volcano. While some volcanoes erupt at regular intervals, there are always exceptions to the rule
Answer:
small volcano's only 1 time while big volcano's mutiple times
Explanation:
pls i need help with this vocab pls! ASAP
1. phototropism
2. geotropism
3. tropism
4. biome
5. symbiosis
6. cortex
George Washington Carver received _____ from God during early morning walks in the woods.?
1. Guidance
2. Inspiration
3. Finances
4. Solutions
(There more than one answer.)
Answer:
1. Guidance
2. Inspiration
I think this is right hope it helps
Jasmine has been reading about mixtures and how they can be classified.
After reading about the kinds of mixtures and their characteristics, she wants to know how a heterogeneous mixture is different from a homogeneous mixture. What is the main difference between these two kinds of mixtures?
A. In a heterogeneous mixture, the components are not evenly spread throughout the mixture. In a homogeneous mixture, the components are evenly spread throughout the mixture.
B. In a homogeneous mixture, the components are not evenly spread throughout the mixture. In a heterogeneous mixture, the components are evenly spread throughout the mixture.
C. In a homogeneous mixture, the components are easy to see and are well mixed so the components show up in different parts of the mixture.
D. In a heterogeneous mixture, the components are difficult to see and are spread out uniformly throughout the mixture.
Answer: The correct option is (In a heterogeneous mixture, the components are not evenly spread throughout the mixture. In a homogeneous mixture, the components are evenly spread throughout the mixture.)
Explanation: Have a good day :)
Answer: its A
Explanation:
I already did the test
Describe three abiotic and three biotic components of an ocean marine ecosystem.
Answer:
abiotic sand sunlight water currents
biotic fish bacteria jellyfish
pretty sure this is right
because biotic is living and abiotic is nonliving
Please help me with number 14.
o(〃^▽^〃)o
Answer:
magnetic field,air,force
Explanation:
PLEASE correct me if im wrong and if im right thanks this answer and make me
Why do some animals die off while other similar animals survive in the same environment?
Answer:
Extinction is often caused by a change in environmental conditions. When conditions change, some species possess adaptations that allow them to survive and reproduce, while others do not. If the environment changes slowly enough, species will sometimes evolve the necessary adaptations, over many generations.
Whats the sum of the coefficients in Na2O + AIBr3 = NaBr AI2O3 of all the reactants and products when this equation is balanced?
Answer:
Answer: 12
Explanation:
\({ \sf{3Na _{2} O +2 AIBr _{3} \rightarrow 6NaBr + AI _{2} O _{3} }}\)
\({ \tt{sum = 3 + 2 + 6 + 1}} \\ = { \tt{12}}\)
Answer:
12
Explanation:
3+2+6+1
How to work out the relative mass of potassium? What is the calculation? ( explained very easily )
Answer:
39
Explanation:
Relative mass does not need to be calculated as it is listed on the periodic table. Potassium's relative atomic mass is around 39.
Fill in the blanks:
An ___________ measures wind speed and a _________ shows wind direction.
A.weather balloon; electroscope
B.anemometer; wind vane
C.flask; beaker
D.oscilloscope; seismograph
It's science btw
Answer:
A.weather balloon; electroscope
HELP ME!!
How many people prefer pepperoni or tomato as a topping?
Answer:
375
Explanation:
325 + 50 = 375
just add them together and you get 375