What are Earth's mineral resources and how long might
reserves last?
Answers
Earth’s mineral resources:
Related Questions
Scientists studying a region in southern Florida have noticed drastic changes in the availability of freshwater. Which of the following probably did NOT contribute to these changes? A. Several years of declining rainfall B. Decrease in the population of pond plants C. Building of new homes in the area D. Construction of a dam on the local river
Answers
Answer:
C. Building of new homes in the area
I'm not totally sure but I think this is the best answer.
An isotope releases radiation in order to ____________ its nucleus.
stabilize
destroy
Answers
Answer:
stabilize
I think this should be the answer...
Answer stabilize
Explanation: hope it’s right
Can someone please answer these two science questions. Please don't answer with just anything for the points, I genuinely need the answers. Thanks! :)
Answers
6.
Answer:
45 meters
Explanation:
notice that is you multiply the time with the speed the units cancel to get distance.
therefore
distance=velocity(time)
distance=(3)15
distance =45 meters
7.
Answer:
1. the speed is constant
2. the average speed is .5 m/s
Explanation:
I have attached a graph of the data in excel.
from excel i got the equation of the line to be y=.5x with y being distance and x being time.
the function is a position function so if you take the derivative of it you get the velocity which is .5.
since the derivative is a constant the the speed does not change and the average velocity is the derivative.
how do electric and magnetic fields interact to create electromagnets?
Answers
Answer:
8548458
Explanation:
95895
The shock from an electric fence would be the least unpleasant if you were
standing
A. on dry, thick gravel
B. in tall grass
C. In wet grass
OD. near the livestock
Answers
Answer: on dry , thick gravel
Explanation:
Which is NOT a component of a nucleotide?
Answers
Answer:
Lysine
Explanation:
A nucleotide is a combination of a nitrogen base, pentose sugar, and phosphate. Adenine, Guanine (purines) and Thymine (pyrimidine) are nitrogen base. Lysine is the amino acid.
Hope it helps,Pls Mark as Brainliest!!
how are magnetic field lines like electric field lines?
A. they always point away from the north pole
B. they never connect
C. they always point toward a negative pole
D. they never cross
Answers
Answer:
I think maybe D
Explanation:
A is wrong, it has to be reversed
B is wrong cause they connect at the poles
C is wrong cause they always point north (that's how compases work)
D is the only one that could be possible
Hope this helped! :D
In a “minute to win it” game, cards are placed between cups to stack them. The contestant then pulls the card out in hopes that they will end with a set of stacked cups. Why does this work?
There is no friction between the card and the cup.
Inertia will keep the top cup from moving very far. Gravity will pull one cup on top of another.
The opening of the cup is so much bigger than the bottom, even though the cup moves they will both be stacked together.
Both cups are moved the same amount by the friction between them and the card.
Answers
Answer:
There is no friction between the card and the cup.
Explanation:
Answer:
The answer option to your question is A) - There is no friction between the card and the cup.
Question attached i need answers quick
Answers
_ is (are) the type of electromagnetic wave(s) with a wave length between 700 and 400 billionths of a meter.
Answers
Answer:
Visible Spectrum is the type of electromagnetic wave with a wave length between 700 and 400 billionths of a meter.
A tugboat is pushing a barge in to a harbor.The barge is exerting a force of 3000 N against the tugboat.which force would most likely allow the tugboat to move the barge into the harbor
Answers
Answer: The Answer is -4500 N
A student measured the volume of three rocks. The diagram above shows the
results of her investigation. Which correctly orders the rocks from least to
greatest?
A. Rock A, Rock B, Rock C
B. Rock C, Rock A, Rock B
C. Rock B, Rock C, Rock A
D. Rock A, Rock C, Rock B
Answers
Answer:
option B is right
...............
Answer: A C B
Explanation:
If you look closely the water levels show which is bigger fun fact.
Suppose that you, with a mass of 48kg, is standing on frictionless roller skates when someone throws you a 2.50kg mass with a velocity of 15m/s and you catch it. What will be your resultant velocity?
Answers
Answer:
v = 0.74 m / s
Explanation:
We can solve this exercise using the conservation of the moment
initial instant. Before the crash
p₀ = m v
where m is 2.50 kg and its velocity v₀ = 15 m / s
final moment. After catching the dough
[tex]p_{f}[/tex] = (m + M) v
As the system is made up of the mass and the person, all the forces during the impact are internal, therefore the moment is conserved
p₀ = p_{f}
m v₀ = (m + M) v
v = m / (m + M) v₀
we calculate
v = 2.5 / (2.5 + 48) 15
v = 0.74 m / s
Which layer of the Sun appears pinkish-red during a solar eclipse?
Answers
Answer:
the answet is the 3 layer of the sun
Explanation:
isaw a solar eclipse and leanerd is
Answer:
Chromosphere
Explanation:
It is the second of the three main layers in the Sun's atmosphere and is roughly 3,000 to 5,000 kilmoeters deep.It's rosy red color is only apparent during eclipses.The chromosphere sits just above the photosphere and below the solar transtion region.
Which of the following is an inclined plane?
- Stairs
- Wheelchair ramp
- Sloping driveway
- Road going up a mountain
Answers
Explanation:
Wheelchair ramp
An inclined plane, also known as a ramp, is a flat supporting surface tilted at an angle, with one end higher than the other, used as an aid for raising or lowering a load.
An ant starts at −5 m and moves 10 m left, 25 m right, 30 m left, and 5 m right. If the positive x-axis is to the right, what are the final position and total displacement of the ant?
A. position: −15 m; displacement: 70 m
B. position: 5 m; displacement: 10 m
C. position: 5 m; displacement: −70 m
D. position: −15 m; displacement: −10 m
Answers
Answer: D.
position: −15 m; displacement: −10 m
Explanation:
Displacement is the distance travelled in a specific direction.
Given that an ant starts at −5 m and moves 10 m left, 25 m right, 30 m left, and 5 m right
Total displacement = -10 + 25 - 30 + 5
Total displacement = -10
And the position = -10 -5 = -15
The correct answer is therefore D.
position: −15 m; displacement: −10 m
motives are activated by
A) thoughts.
B) internal physiological states.
C) external cues.
D) all of these
Answers
Answer:
D all of these gufjbihbuxhbi
What is the basic premise of the universal gravitational law?
Answers
Answer:
Newton's law of universal gravitation is usually stated as that every particle attracts every other particle in the universe with a force which is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers.
Explanation:
Answer:
Each object in the universe that has mass attracts every other object that has mass
Explanation:
Its the correct answer on the quiz
A book with a mass of 1.2 kg sits on a bookshelf. If it has a gravitational
potential energy of 50 J, how high is the shelf? The acceleration of gravity is
9.8 m/s2
A. 1.2 m
B. 4.3 m
C. 5.9
D. 2.7 m
Answers
I'm sorry, I just saw this. I hope I'm not too late.
GPE = mass * gravity * height
height = GPE/(mass * gravity)
height = 50/(1/2 * 9.8)
height = 10.2041 Meters
A book with a mass of 1.2 kg sits on a bookshelf. If it has gravitational potential energy of 50 j, how high is the shelf ? The acceleration of gravity is 9.8 m/s 2
Answers
Answer:
B
Explanation:
The shelf will be b) 4.3 m high
What is Gravitational potential energy ?
Gravitational potential energy is the energy possessed or acquired by an object due to a change in its position when it is present in a gravitational field.
given
mass = 1.2 kg
gravitation potential energy = 50J
h = ?
acceleration of gravity is 9.8 m/s 2
gravitation potential energy = m*g*h
50 J = 1.2 kg * 9.8 m/s^2 * h
h= 4.251 m
h ≈ 4.3 m
The shelf will be b) 4.3 m high
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An illustration of a nuclear reactor. There are 3 parallel lines sticking half out of the reactor labeled rods containing uranium. There are parallel rods in the reactor labeled neutron-absorbing material. It is labeled nuclear reactor.
A power plant needs to slow down the fission reactions in its nuclear reactor. In which direction should the uranium-containing rods in the diagram be moved?
left
right
up
down
Answers
Answer:
D) down
Explanation:
I guess it and got it right :)
What happens when an object absorbs all the light striking it?
It appears blue.
It appears red.
It appears black.
It appears white.
Answers
Answer:
it appears black
Explanation:
that's my best guess
ASAP if you answer right I will mark brainiest
Answers
Answer:
I'm glad you asked!
Explanation:
1.Venus is the hottest planet in the solar system.
2.Opportunity explored Mars' surface.
3.Earth is the only planet in the solar system known to have plate Tectonics.
4.Mercury is one of the four planets closest to the Sun.
5.Mercury is the smallest of all planets in the solar system.
6.Messenger is a space aircraft that orbits and studies Mars.
7.Venus has the largest volcano in the solar system.
As a liquid the refrigerant transfers thermal energy to the
outside air
TRUE
FALSE
Answers
Answer:
True
Explanation:
As a liquid, the refrigerant absorbs thermal energy from the cool air inside the refrigerator and changes to a gas. As a gas, it transfers thermal energy to the warm air outside the refrigerator and changes back to a liquid.
What evidence (data) would support the claim that an increase inhuman population contributes to the emission of greenhouse gases?
A. greenhouse gas production has leveled off once the global population reached a certain number
B. amount of greenhouse gases produced varies with the level of development a country has reached
C. greenhouse gas emissions per individual humas has decreased over the past 30 years
D. 10 countries with the largest populations are the countries that produce the most greenhouse gases
Answers
The answer would be D. 10 countries with the largest populations are the countries that produce the most greenhouse gases.
This is the only statements that supports the idea of large populations affecting the emissions of greenhouse gases.
Hope this helps!
I can not find the answer to the one after potassium ?
Answers
Answer:
it’s halogen
Explanation:
A softball has a (positive/negative) acceleration when it is thrown. A soft ball has a (positive/negative) acceleration when it is caught
Answers
Answer:
A softball has a positive acceleration when it is thrown. A softball has a negative acceleration when it is caught.
Explanation:
In a series circuit, electrons only flow along one path. Given this information, which of the following is an advantage of series circuits?
A.
The voltage is the same everywhere in a series circuit.
B.
Less resistance is produced as more devices are added to the circuit.
C.
Series circuits are simpler than parallel circuits.
D.
If one part of the circuit breaks, the other parts will still be able to operate.
Answers
Answer:
C. Series circuits are simpler than parallel circuits.
Explanation:
In series circuit, all the components are connected in single path of current flow. If one part of the circuit breaks, the whole thing would break and none of the other parts would work. The voltage is not the same everywhere. It is different across each component. In series circuit, net resistance is more as resistance of all the components connected in series are added up. So, the only advantage of a series circuit is that is simpler than the parallel circuits.
With a bar magnet, where are lines of force the closest together?
A) At the tip of either of the magnet's poles
B) At a point outside the magnet halfway between the poles
C) Inside the center of the magnet
Answers
Answer:The lines of force in a magnet is closer together at the ends of a bar magnet.
Explanation:Is equally strong at the north pole when compared with the south pole. The force is weaker in the middle of the magnet and halfway between the pole and the center.
Based on the table, which isotope is best suited for use as a radioactive tracer for the body’s use of calcium? calcium-40 calcium-45 calcium-47 calcium-49
Answers
Answer:
calcium-47
Explanation:
Just did the test. Good Luck!
The isotopes of calcium are artificially produced to use them as a radioactive tracers. Calcium 47 is best suited for use as a radioactive tracers for body's use of calcium.
What is radioactive tracer?A radioactive tracer consists of a chemical compound in which one or more atoms are replaced by a radioisotope.
Out of the six isotopes of calcium, calcium 47 is the most suitable isotope.
Calcium-47 consists of the half-life of about five days. This duration is long enough for biological investigations.
Thus, Calcium 47 is best suited for use as a radioactive tracers for body's use of calcium.
Learn more about radioactive tracer.
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