Answer:
When you post something from last year and then no one responds
Answer:
A
Explanation:
Destiny is a physical property of matter and can be used to classify substance, Destiny
is calculated by which of the following
A. d =v/m
B.d =m/v
C.d =m/w
D. d =w/v
Which best categorizes the different types of air.
a
Both warm and cool air have low pressure
b
Warm air has high pressure, cool air has low pressure.
c
Warm air has low pressure, cool air has high pressure
d
Both warm and cool air have high pressure
Answer:
B.
Explanation:
Science
The theory of continental drift states that the land masses called continents were once closer together and have drifted apart over time. Which circumstance is the strongest evidence in support of this theory?
Select one:
the periodic climate changes of Earth
the migration patterns of birds
the large variety of animals on each continent
the similarity of fossils on different continents
Answer:
D or the fourth choice.
Explanation:
Uranium is a radioactive element that is highly unstable and it has a half-life of 4.5 billion years. Uranium comes in many different forms (shown below). Looking at the nuclear notations below, what is the neutron number of both of the elements below? What is the relationship of the two elements below?
A: U-235 has 235 neutrons, U-238 has 238 neutrons and they are isotopes of each other.
B: U-235 has 143 neutrons, U-238 has 146 neutrons and they are isotopes of each other.
C: U-235 has 235 neutrons, U-238 has 238 neutrons and they are ions of each other.
D: U-235 and U-238 have 92 neutrons and they are ions of each other.
Answer: c
Explanation:it just is
U-235 has 235 neutrons, U-238 has 238 neutrons and they are ions of each other. So the correct option is C.
What is uranium?Since more than 60 years ago, uranium, a heavy metal, has been employed as a plentiful source of concentrated energy. Uranium is as prevalent in the Earth's crust as tin, tungsten, and molybdenum, and it can be found in most rocks in quantities of 2 to 4 parts per million.
Seawater contains uranium, which may be extracted from the seas. German scientist Martin Klaproth made the discovery of uranium in the mineral pitchblende in 1789. Following the discovery of the planet Uranus eight years earlier, it was given that name.
In supernovae, uranium is thought to have been created around 6.6 billion years ago. Even though slow radioactive decay is uncommon in the solar system, it is the primary source of heat inside the Earth today, creating convection and continental drift.
Due to its great density, uranium is also used as radiation shielding, as counterweights for aviation control surfaces, and in boat keels. The melting point of uranium is 1132 °C. Uranium has the chemical symbol U.
Therefore the correct option is C.
Read more about uranium, here
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Which of the following statements is true?
a. An insulator speeds up the transfer of heat.
b. Radiation is the transfer of heat in solids.
c. All moving objects experience friction.
d. All work gains some energy as heat.
Answer:
C is correct
Explanation:
For example, you move your hands together you are creating friction.
Which set of terms best defines what affects kinetic energy and potential energy, respectively?
position, gravity
gravity, velocity
velocity, height
height, position
Answer:
A
Explanation:
Answer:
C.
Explanation:
Velocity, height
Have a good day and peace out
Answer:
HAVE AN BLESSED DAY AMEN!!!!!!!!!!!!!!!!
Explanation:
(Fill in the blanks)
The movement of water into and out of cells is very _____. Cells need water to ____ properly.
Answer:
important, function
Explanation:
Hope this helps!
What is an important characteristic for chemicals released into the environment used to seed clouds?
Answer:
the rain
Explanation:
HELP PLS THIS IS DUE IN 15 MINUTES PLS PLS PLS!!! I WILL MARK BRAINLIEST IWTH THE BEST ANSWER!!!
List 2 Physical Changes & 2 Chemical Changes and explain why.
Answer:
A chemical change results from a chemical reaction, while a physical change is when matter changes forms but not chemical identity. Examples of chemical changes are burning, cooking, rusting, and rotting. Examples of physical changes are boiling, melting, freezing, and shredding.
Explanation:
Answer:
A chemical change results from a chemical reaction, while a physical change is when matter changes forms but not chemical identity.
physical changes are boiling, melting, freezing, and shredding.
Explanation:
need help as soon as possible ill give brainliest!!!!!!!!!!!!!!!!
Answer:
The Answer is Magma
Need help ASAP with this question
Answer: noble gasses
Explanation: zoom on on the red section and look at the key for what red means.
What type of interaction is taking place when a turtle buries itself in the soil to stay cool?
A. biotic interaction
B. Abiotic interaction
C. Chemical interaction
D. Biotic and Abiotic interaction
HELP ME!!!
Answer:
so I would say abiotic cuz soil helps them cool down plus theres probably minerals in the soil
abiotic and biotic factors of a turtle would be:
biotic: shell, aniamals, plants organsims
abiotic: rocks, minerals, componds,temperature
hope this is right :))
Answer: biotic and abiotic interaction
Explanation: turtle, shell, biotic and soil minerals abiotic
Given the amount of work required to move a box 15 meters across the floor is 75J. What is the force that is needed?
a. 5 N
b. 25 N
c. 30 N
d. 2 N
PLS PLS PLS PLS PLS HELP MEEEEEEEE PLS PLS PLS PLS PLS
In our experiment that will compare how long it will take for 100 ml distilled water to evaporate from a from a 5" diameter container. This will be the control group. For the experiment group, we will use 100 ml of distilled water and dissolve 10 grams of table salt in the water. We will use the same diameter dish for both samples so the same amount of water surface is exposed to the air.
What is the question?
A. Does salt water evaporate when placed in a container?
B. How fast does distilled water evaporate if placed in a container?
C. How long does it take distilled water to evaporate from a 5” diameter container?
D. Does a salt water evaporate in the air faster than distilled water?
Answer:I don’t think this will do much but...
Explanation:I think it is D. You should not listen to me though because I am not sure, I just think it is the more reasonable answer (question).
What is the largest contributor to the greenhouse effect?
Answer:
burning of fossil fuels
Explanation:
how is the sun's energy related to hydroelectric energy yeah I don't know what subject this is so i put chemistry unless it is
Which arrow or arrows represent reactions that demonstrate a conservation of mass and energy? Explain your answer
Answer:
i need a picture of ur question
Explanation:
Choose all the answers that apply.
The sun _____.
a. creates energy from fission reactions
b. creates energy through fusion reactions
c. transfers heat through radiation
d. is made of hydrogen and helium
e. uses its own mass to create energy
calculate the density of an objects whose mass is 93.2 g and its volume is 4.67
Answer:
19.9571734475
Explanation:
Mass/Volume= Density
Which is the best way to define wind?
a
Wind is the movement of air from areas of low pressure to areas of high pressure
b
Wind is the movement of air to a colder area in the atmosphere.
c
Wind is the movement of air from areas of high pressure to areas of low pressure.
d
Wind is the movement of air pushed around and bouncing off Earth's surface.
Which of the following statements is true based on an element with 7 valence electrons?
If you would like to view the Reference Material, click here.
The element is a stable metal.
The element is a reactive nonmetal.
The element is a stable nonmetal.
The element is a reactive metal.
Answer:
he element is a reactive nonmetal.
Explanation:
determine the volume of a substance given that the density is 2.6 g/mL and its mass 5.5 g
Answer
Density of the substance = 10g/cm3.
Explanation:
What is an example of osmosis?
Answer: Sugar Solution
Explanation:
When a sugar solution and water, top, are separated by a semipermeable membrane, The solution's large sugar molecules can't pass through the membrane into the water. Small water molecules move through the membrane until equilibrium is established, at the bottom which is a example of osmosis :).
1. reaction that releases heat
outer ear
2. flow of electrons through a material toward a positive charge
compression
3. build up of electrons in a material
static electricity
4. part of the ear is responsible for capturing sound waves
exothermic
5. part of the sound wave where the molecules are pressed closely together
current electricity
A book is sliding across a horizontal tabletop. As it slides, slows down. Which of the following statements best explains this situation?
There is a balanced force on the book caused by gravity.
There is no upward force acting on the book.
There is an unbalanced force on the book caused by friction.
There are no unbalanced forces acting on the book.
A book is sliding across a horizontal tabletop. As it slides, slows down. There is an unbalanced force on the book caused by friction.
What is friction ?The force preventing sliding against one another of solid surfaces, fluid layers, and material components is known as friction. There are several kinds of friction, The force that opposes the relative lateral motion of two solid surfaces in contact is known as dry friction.
When a stick is used to beat the carpet, a little amount of static friction occurs, holding the dust to the carpet. When we beat a carpet with a stick, the stick's external force forces the carpet to move away from the dust by overcoming friction.
A frictional force or an opposing force is produced when two rough surfaces come into contact with one another. This force can occasionally be transformed into heat.
Thus, option C is correct.
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Which of the following reactions best illustrates the Law of Conservation of Matter?
A.) H2O2H2O + O2
B.) Na + CuS Na2S + 2Cu
C.) K + AgCl KCl + Ag
D.) NaOH + 2HCl NaCl + H2O
Answer:
answer A..) H2O2HO+O2
I need your help.
What is the basis of an organic molecule?
(A). The basic structure is the iron atom.
(B). The basic structure is the potassium atom.
(C). The basic structure is the carbon atom.
(D). The basic structure is a carbon monoxide molecule.
Answer:
I think c
Explanation:
Answer: C
Explanation: Its C because Life is based on carbon, organic chemistry studies compounds in which carbon is a central element. The properties of carbon make it the backbone of the organic molecules which form living matter. Carbon is a such a versatile element because it can form four covalent bonds.
Please Help Me!!
Zn + 2HCl --> ZnCl2 + H2 Which of the following provides the best evidence that this reaction follows the law of conservation of mass?
There are 3 different answers you can pick from.
no coefficient
2
3
