**URGENT**** Which group of elements has the highest boiling point? *
IIIa (13)
IIa (2)
Ia (1)
IVa (14)
Transition metals
Answer: the elements that have the hightse boiling is trnsition metals
xplanation:
Which of these is a balanced chemical equation?
2Ca + O^2 → 2CaO
Ca + O^2→ CaO
Ca + 2O^2 → 2CaO
2Ca + O^2 → CaO
Answer:
The first one: 2Ca + O^2 → 2CaO
Answer:
first option -> 2Ca + O^2 → 2CaO
Explanation:
hope this helps
The chemical equation shown represents photosynthesis.
Carbon dioxide + A + light ---------> B + oxygen.
What is the role of substance A in photosynthesis?
A. It stores chemical energy for plants and animals.
B. It traps light energy and converts it into chemical energy.
C. It combines with carbon dioxide and light to form glucose.
D. It combines with carbon dioxide and light to form hydrogen.
The further away from the sun a planet is, the hotter it is.
True
False
Answer:
False
Explanation:
The farther away a planet is, the colder it is.
the anwser is true
Explanation:
i don't like to really explain but that's the anwser it relies on its orbit
An atom is mostly made up of... *
Empty space
Heavy electrons crowding the nucleus
A massive nucleus surrounded by clouds of electrons and protons
A massive nucleus consisting of electrons, protons, and neutrons
Give two ways to prove that liquids, like water, are matter.
Answer:
they occupy space
they have mass
Please help me with this honestly I'm clueless It's 7th science work......please help
Answer:
describe the physical characters that can be observed: phenotype
a specific characteristic of an organism: trait
a section of DNA that provides instructions for specific traits: genes
allele expressed in the phenotype even if only one copy is present in the genotype: dominant
Explanation:
Pls help How can you drop two eggs the fewest amount of times, without them breaking
Answer:
Explanation:
"How can you drop two eggs the fewest amount of times, without them breaking? Easy. This is done on any floor, the highest or the lowest. Simply drop the egg from one inch above your foot and it will not break. "
At a rate of 2 feet per second, how many yards could a projectile travel in one minute?
Answer:
40
Explanation:
2 times 60 divided by 3
Give two ways to prove that liquids, like water, are matter. (AKA "How are liquids, like water, are/is matter?"; "How is liquid a state of matter?")
The questions mean the same thing. I just put it there so some people won't get confused.
Answer:
Liquids will flow and fill the lowest portion of a container, taking on the shape of the container but not changing in volume. The limited amount of space between particles means that liquids have only very limited compressibility.
An object resting on top of a building has the most potential energy ....
before it stops moving
when it stops
objects cannot have potential energy
before it stops moving
Answer:
when it stops
Explanation:
potential energy is pretty much energy being stored when an object is inactive or not moving
I believe this is right-
What forces are present in this situation?
An elevator is rising at a constant speed; the elevator is the object in this situation.
gravity
normal, gravity, and tension
gravity and tension
normal and tension
Answer:
gravity and tension i believe is the answer HOPE THIS HELPED
Explanation:
What is civic expression?
Answer:
Civic expression includes all the ways citizens share their opinions and show concern for their community. It can take the form of action, such as voting, but it can also be demonstrated through writing or spoken text. It is a critical part of American society.
Explanation:
help please!!!!!!!!! :(
Answer:1 and 4
Explanation:
take notes
A bird flies at a speed of 15 m/s for 10 seconds, 1,200 m/min for 0.17 minute, and 2,500 cm/s for 5,000 milliseconds. What is the bird’s average speed?
Answer:
Explanation:
average speed=distance travelled/time taken
distance=speed*time
15*10=150 m
1200 m/min=20 m/s
0.17 minute=10.2 seconds
20*10.2=204 m
2500 cm/s=25 m/s
5000 milliseconds=5 seconds
25*5=125 m
125+150+204=479 m
10.2+5+10=25.2
479/25.2=19.0
Which of the following is not true about both scientific laws and scientific theories?
A. Both are based on hypotheses
B. Both can be used to make predictions
C. Both can be modified if new evidence arises
D. Both are used to explain why a phenomenon happens.
Answer:
d
Explanation:
Match the term to its definition (Hint: Look at the bottom of the article)
Column A
1.
Winter Storm Watch:
Winter Storm Watch
2.
Winter Storm Warning:
Winter Storm Warning
3.
Frost/Freeze Warning:
Frost/Freeze Warning
4.
Ice Storm Warning:
Ice Storm Warning
5.
Blizzard Warning:
Blizzard Warning
6.
Winter Weather Advisory:
Winter Weather Advisory
7.
Heavy Snow Warning:
Heavy Snow Warning
Column B
a.Conditions from recent winter weather can be hazardous (especially for drivers).
b.A combination of snow and wind will create limited visibility, drifting snow, and dangerous wind chills
c.There will be more than four inches in 12 hours or six inches in 24 hours.
d.A winter storm is likely. The storm may include sleet, snow, ice, or a combination of them.
e.There will be dangerous accumulations of ice
f.The winter storm is expected to enter the area
g.The temperature will dip below freezing
Answer:
Answer: Winter
Explanation:
It all relates to winter and cold
if the Universe was born at the Big Bang, what existed before then?
Try to answer that it's impossible UvU
Explanation:
It's possible that before the Big Bang, the universe was an infinite stretch of an ultrahot, dense material, persisting in a steady state until, for some reason, the Big Bang occured. This extra-dense universe may have been governed by quantum mechanics, the physics of the extremely small scale, Carroll said.
The number of atoms in a grapefruit would be equivalent to
Answer:
The answer Is B!
Explanation:
...............
To see the number of atoms of an element in a given molecule we need to multiply stoichiometry to the number that is written on the foot of the element that is stoichiometry. The correct option is option B.
What is atom?Atom is the smallest particle of any element, molecule or compound. Atom can not be further divided. Atoms contains nucleus in its center and electron that revolve around the atom in fixed orbit.
In the nucleus, proton and neutron are present. Electron has -1 charge while proton has +1 charge. Neutron is neutral that is it has no charge. So overall the charge of nucleus is due to only proton, not by neutron. The number of atoms in a grapefruit would be equivalent to the number of blueberries in the house.
The correct option is option B.
To know more about atom, here:
https://brainly.com/question/13518322
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differentiate between respiration and combustion
Answer:
Both combustion and respiration involve the burning of the substrate. In both of these processes, the substance undergoes oxidation (in presence of oxygen).
...
Difference Between Respiration and Combustion.
Respiration Combustion
It takes place in a controlled manner inside the cells. It is an uncontrollable process.
Explanation:
PLS HELP IT IS DUE TODAY IN 30 MINS PLS ANSWER 14 POINTS
Name the various types of energies on the spectrum
Answer:
gamma rays, X-rays, ultraviolet radiation, visible light, infrared radiation, and radio waves.
Explanation:
hope that helps! (:
Where does the rest of the energy “lost” go?
(In food webs)
Explanation:
The rest of the energy is passed on as food to the next level of the food chain. The figure at the left shows energy flow in a simple food chain. Notice that at each level of the food chain, about 90% of the energy is lost in the form of heat.
Answer:
While the total energy of a system is always conserved, the kinetic energy carried by the moving objects is not always conserved. In an inelastic collision, energy is lost to the environment, transferred into other forms such as heat.
Explanation:
Using at least 5 sentences, mostly in your own words, describe the nitrogen cycle including the following terms: bacteria, atmosphere, nitrogen, plants, animals, nitrogen fixation, ammonification, nitrification, denitrification, and decomposers.
Answer:
How overuse of nitrogen-containing fertilizers can cause algal blooms. ... Some species of nitrogen-fixing bacteria are free-living in soil or water, while others are ... What are some examples of nitrogen-fixing prokaryotes? ... There, the ammonification, nitrification, and denitrification processes are performed.
Explanation:
In the nitrogen cycle, nitrogen circulates through both living and non-living objects, including the atmosphere, soil, water, plants, animals, and microorganisms.
What is nitrogen cycle ?
The nitrogen cycle is a biogeochemical process through which nitrogen is changed into a variety of forms before returning to the atmosphere after first entering the soil and then organisms.
It involves a number of chemical reactions, including the fixation of nitrogen, nitrification, denitrification, decay, and putrefaction.
This process involves Nitrosomonas converting ammonia into nitrite in the first stage and Nitrobacter converting nitrite into nitrate in the second. Plants subsequently eat this nitrate. The process of denitrification is the last stage of the nitrogen cycle.
Thus, nitrogen cycle involves total seven steps.
To learn more about nitrogen cycle refer the link below;
https://brainly.com/question/1615727
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What is a negative impact of resource use?
Which one of these objects has potential energy ? Can someone plzzzz help me out!!!
A trapezoid is broken into 2 triangles and 1 rectangle. The rectangle has a base of 1 meter and height of 4 meters. Both triangles each have a base of 2 meters and a height of 4 meters.
A trapezoid was broken into a rectangle and two equal triangles.
The base of each triangle b is __ m.
The area of the rectangle is __ m2.
The area of each triangle is __ m2.
The area of the trapezoid is __ m2.
Answer:
2, 4, 4, 12!
Explanation:
The base of each triangle b is
✔ 2
m.
The area of the rectangle is
✔ 4
m2.
The area of each triangle is
✔ 4
m2.
The area of the trapezoid is
✔ 12
m2.
Answer:
20
21
less then
brainly pls
You and your friends decide to travel, on foot, to your favorite beach at the Jersey Shore. Your speed for the first part of the trip is 2.2 mi/hr. Twenty-three minutes after starting your trip, the group decides to stop at a convenience store for a drink. After stopping at the convenience store for five minutes, you continue your travels for 0.9 hour and then stop at a local fast-food restaurant for a bite to eat. You spend 20 minutes eating your favorite burger and 480 seconds after continuing your journey, you stop to use the restroom for 0.5 hr. Now that everyone feels a little lighter, the group increases its speed to 5.5 km/hr and spends the next 900,000 milliseconds traveling to a friend’s beach house to get sun block. After spending five minutes getting the sun block and raiding your friend’s pantry for snacks, the group starts “fist-pumping” in anticipation of their arrival at the beach. Eleven minutes and twenty five seconds later, you and your friends finally feel the warm sand beneath your feet. Approximately how many miles away is the beach?
Answer:
Sorry dont know
Explanation:
Help asap, answer the question 1 by 1 I need help
Answer:
2 atoms of pb
4 atoms of br
2 molecules
Explanation:
EZ
Indicate which statement describes a scientific theory.
A. For every action, the is an equal and opposite reaction.
B.Any two objects, no matter their mass, exert gravitational force toward one another.
C. Within a sequence of layers of sedimentary rock, the oldest layer is at the bottom while the youngest layer is at the top.
D.Earth's average temperature will continue to increase because of the deterioration of the ozone layer.
-Watch the video
-Answer the following question. Make sure you site evidence. Make sure you use complete sentences.
Question:
Are fires always bad in the environment? Why?
-Please don't just say yes or no because
(How Wildfires Help! | Science for Kids)
^video is by SciShow Kids ^
Answer:
maybe you should watch the video...
we can't help you because we don't have the vid.
Explanation: