Answer:
i think B water
Explanation:
If this container of liquid water was frozen into ice and then, thawed back into liquid what would the volume be?
Answer:
35
Explanation:
because it's is still the same amount even if you freeze it
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Zn + 2HCl --> ZnCl2 + H2 Which of the following provides the best evidence that this reaction follows the law of conservation of mass?
If all three metals were exposed to extremely high temperatures, which would be the last to melt? (copper, gold, mercury)
Answer:
mercury
Explanation:
From these three metals, mercury would melt the fastest. Its kinda like water, it changes states quickly unlike gold and copper
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.
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_____ is when the amperage put over a wire or circuit is more than it can handle.
Answer:
Ii is the circuit overload
Explanation:
Answer:
Circuit Overload
Explanation:
Which statement describes the energy changes that occur when water in a tea kettle is heated on a stove that uses natural gas
A:Some of the chemical energy in the natural gas transforms into thermal energy, which heats the water. Then some of the thermal energy changes into sound energy when the water forms steam and the steam leaves the kettle.
B:Some of the electrical energy in the natural gas transforms into thermal energy, which causes the water to form steam. Then some of the thermal energy changes into sound energy and light energy when the steam leaves the kettle.
Answer:
A!
Explanation:
Coastal waters in cool, humid areas where fresh water rivers run into the ocean tend to have lower ____________________.
You see a worm crawling along the ground and wonder if scientists consider it living or nonliving. Which item below would not be true when classifying the worm as living or non‐living?
A worm can move so it must be living.
A worm can reproduce and make little baby worms (called wormlets) so it must be alive.
Worm’s pass dirt through their body pulling food out and discarding the stuff they don’t want so it must be alive.
If you cut a worm in half, it can re‐grow so it must be alive.
Answer: a. A worm can move so it must be living.
Explanation:
If a worm is moving it is classified as a moving worm also known to be living if moving.
A worm could reproduce therefore it is living.
Worms do pass dirt into and through there bodies to eat of the minerals and discarding things through and let out.
If you do cut a worm in half it may damage it but since it has basically two heads on girl one boy and cut in half it may split them up, and make damage but they will eventually grow back if the injuries are not severe.
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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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1. Kylee has been learning that engineering and technology are beneficial to people. She now sees how things people synthesize are useful. The useful materials that benefit people are synthesized from _______.
A.synthetics
B.natural resources
Answer:
answer is B
Explanation:
natural resources is d answer
The mass of an unidentified rock is 15.5 grams. Students determine the volume of the rock by placing the rock in a cylinder with water. The students calculate the density of the rock. They determine the identity of the rock based on the density ranges in the table.
Rock Density Ranges
Rock Density Range
(g/cm3)
Coal 1.1-1.4
Dolomite 2.8-2.9
Peridotite 3.1-3.4
Sandstone 2.2-2.7
The students most likely have which type of rock?
A: Coal
B: Dolomite
C: Sandstone
D: Peridotite
Help me guys plzlzlz
i think its d because 900+1200 is 2100, but im probably wrong for question 1
When they're trying to solve a problem, engineers follow a series of Question 1 options: problems steps solutions tests
Answer:
the answer solutions tests I think
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:
Isopropyl alcohol is a clear liquid with a density of 0.78 g/cm3. If the same small sphere (with a density of 0.88 g/cm3) is dropped in a beaker of isopropyl alcohol, predict whether the sphere will float or sink?
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
need help as soon as possible ill give brainliest!!!!!!!!!!!!!!!!
Answer:
The Answer is Magma
Plz help asap! Good answers plz!
Explain why action and reaction forces are not balanced forces.
Answer:
Explanation:
Newton's third law of motion states that every action has an equal and opposite reaction. This means that forces always act in pairs. Action and reaction forces are equal and opposite, but they are not balanced forces because they act on different objects so they don't cancel out. hope that helped
Answer:
Action and reaction forces are equal and opposite, but they are not balanced forces because they act on different objects so they don’t cancel out.
Explanation:
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.
Daniel is testing objects for his science experiment. He has a chart listing the mystery objects' densities, but no other information. He places each object in large bowl of water in order to determine if any float. Which of the objects, if any, will float?
A.Object B
B.Object C
C.NONE of the objects will float.
Answer:
B.
Explanation:
its on quizziz lol
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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:
jenny turned on the fan in her bedroom. what energy transformation took place when she turned on the fan
Answer:
Kinetic energy
Explanation:
Kinetic energy is energy when something is in motion
A student used a portable electric drill to remove screws from a broken wooden table. He noticed that the screws holding the table together were warm to the touch after being removed from the wood. Which statement best explains this phenomenon?
A:Electrical energy from the drill was converted into chemical energy due to conductivity.
B:The process of removing the screw concentrated the thermal energy that was already present in the wood
Answer:
A.
Electricity can travel through metal, such as the screws, creating a conductor.
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
Examples of microhabitats could be a rotting tree stump or a dead animal. List 3 microhabitats.
Answer: Okay!
Explanation: Well then the third thing could be dead plant? You already have 2 other things
Answer:
Examples of microhabitats on the short grass prairie of the Llano Estacado include temporary pools of water, a decomposing log or animal, cryptobiotic soils, lichen growth, under rocks, leaf litter, termite tubes, and the interior of an ant bed.
There are different types of microhabitats in a wood, namely, coniferous forest, open woodland, broad-leafed forest, clearings and glades, smooth barks, rotten wood, damaged barks, canopy, and shrub layer, among many other variations.
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:
How do matter and energy move through an ecosystem?
My scientific explanation is:
Your answer should include at least 1-2 complete sentences to explain the claim, evidence and reasoning.
Be sure to check your grammar and spelling.
Use the Sentence Starter to help you:
Matter and energy move through an ecosystem by...
Answer:
Decomposers (organisms that break down dead producers and consumers and organic waste) obtain the energy they need to live from chemical bonds of the dead and waste-matter. The energy is transferred both to the decomposer (for growth and development) and to the ecosystem (as heat energy)
Explanation:
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Before you can solve a problem, the first thing you have to do is Question 2 options:
define the problem
build a prototype
design your solution
test your solution
What is the largest contributor to the greenhouse effect?
Answer:
burning of fossil fuels
Explanation: