a miner has a mixture of gold and sand he heats the mixture and the gold melts if the density is 19.3g/cm3 will the sand float
Answers
Answer:
the explanation is attache d to a picture
Related Questions
Which term describes the radiation produced by alpha decay?
A. A beta particle
B. An electromagnetic wave
C. A helium nucleus
D. An electron
Answers
Answer:
C. Helium nucleus
Explanation:
During alpha decay, a radioactive atom releases an alpha particle that is equivalent to the nucleus of a helium atom.
Answer:
Person above me is correct C. Helium Necleus
Explanation:
Doctors use radioactive sources as tracers for medical imaging. The table below shows the properties
of some radioactive sources. Which source would be the best to use for a tracer that must be injected
into the body?
Enter your answer as a number
Radioactive source
Type(s) of
radiation emitted
Half-life
1
gamma
7 weeks
2
beta
3 days
12 minutes
3
alpha and gamma
4
gamma
23 minutes
5
alpha
4 hours
Answers
Answer:
Technetium.
Explanation:
Tc is a very versatile radioisotope, and is the most commonly used radioisotope tracer in medicine. It is easy to produce in a technetium-99m generator, by decay of 99Mo. ... Tc decays by gamma emission, with a half-life: 6.01 hours.
Answer:
its the fourth one
DESPERATE WILL GIVE BRAINLIST AND THANKS
Which statement below best describes Gregor Mendel’s conclusions about genetics based on his pea plant experiments?
A. DNA is the biomolecule of life. Its structure is a double-helix and it is the blue print for the structure and function of an organism.
B. Each parent plant transmits certain factors to its offspring. These factors combine and determine the plant’s traits.
C. When two organisms reproduce, the offspring will generally result in a blending of the parent’s traits.
D. Mendel’s experiments ended up being inconclusive. Although he saw some patterns of inheritance, he was unable to determine the “how” behind it.
Answers
Answer:
B is the best answer.
Explanation:
A is off-topic considering the pea plant experiments, C is close, but too general and can be proven wrong, and D is just flat out wrong. The process of elimination leaves B to be the best answer.
A wire in a circuit carries a current of 0.9 A.
Calculate the quantity of charge that flows through the wire in 50 s.
Give the correct unit with your answer.
Use the equation: charge = current x time
Answers
Answer:
45coulombs
Explanation:
Using your equation current=0.9 & time=50secs multiply and your answer is 45. Hope the answer is good enough for u
Please help ASAP please
Answers
Answer:
Explanat WRITE A ONE PAGE ESSAY TO EXPLAIN THE AUTHOR'S PURPOSE IN WRITING HOM SMART ARE ANIMAL
The kidneys help the body preserve water. When an animal has not had enough to drink, the kidneys signal the body to absorb water. The animal produces little urine, so it loses less water. During this process, the kidneys work in conjunction with which body system?
A
respiratory
B
integumentary
C
excretory
D
immune
bonus question fredo bang or nba young boy
Answers
C
Explanation:
That’s the only one that actually connects to the question, every other answer is talking about a different function of the body.
What is the definition of the half-life of a radioactive isotope?
A. The time it takes for half the parent nuclei in a sample to become
daughter nuclei
B. The time it takes for all the parent nuclei in a sample to become
daughter nuclei
C. The time it takes for all the daughter nuclei in a sarnple to become
parent nuclei
D. The time it takes for half the daughter nuclei in a sample to
become parent nuclei
Answers
Answer:
A
Explanation:
The amount of time necessary for half of anything to go through a process, such the amount of time needed for half of a radioactive substance's atoms to decay. Thus, option A is correct.
What half-life of a radioactive isotope?The period of time it takes for one-half of a radioactive isotope to decay is known as the half-life. An individual radioactive isotope's half-life is unaffected by environmental factors and is independent of the isotope's starting concentration.
Radiation emission stops after an atom achieves energy stability through radiation. A radionuclide's concentration falls over time, and its radioactivity declines. A (physical) half-life is the length of time required for radioactivity to degrade and diminish to half.
Therefore, The time it takes for half the parent nuclei in a sample to become daughter nuclei.
Learn more about isotope here:
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Preview this picture of a roller coaster. Does it make you feel safe? How does the picture reinforce the idea of roller coasters being safe as stated in the article?
Answers
Answer: The coaster tracks serve to channel this force — they control the way the coaster cars fall. ... If the tracks slope down, gravity pulls the front of the car toward the ground, so it accelerates. If the tracks tilt-up, gravity applies a downward force on the back of the coaster, so it decelerates.
Explanation: They may be safe though!
1 point
If there is a surge in the demand for electricity in the UK, which of
these power stations can be used to meet this demand quickly? *
Nuclear
Gas
Wind
Solar
Submit
Answers
Answer:
Option A nuclear
Explanation:
The rate of electricity production in nuclear power plant is much higher as compared to the rate of electricity generation in gas, wind and solar power plants.
Thus, in case where large amount of electricity is to be produced in a short period then one must rely on nuclear power plants.
Therefore, option A is correct
Answer: Option A- Nuclear power station
Explanation: During a sudden increase in demand, Nuclear power stations can be used easily to supply the needed energy as they have an extremely short start up time. This means that the energy can be supplied in a short period of time.
A scientist is studying a newly created substance. She performs a test in which she keeps adding heat to the substance until it catches on fire. What type of property is she measuring?
Answers
Answer:
Chemical property (flammability).
Explanation:
An experiment can be defined as an investigation which typically involves the process of manipulating an independent variable (the cause) in order to be able to determine or measure the dependent variable (the effect).
This ultimately implies that, an experiment can be used by scientists to show or demonstrate how a condition causes or gives rise to another i.e cause and effect, influence, behavior, etc in a sample.
In this scenario, a scientist is studying a newly created substance. She performs a test in which she keeps adding heat to the substance until it catches on fire. Thus, the type of property she is measuring is a chemical property (flammability).
Flammability can be defined as a chemical property which measures the ability of a substance (matter) to ignite or burn due to the presence of oxygen and heat.
Can you please help me figure out the work for the missing quantities?
Answers
Answer: set up proportions
Explanation:
A graph labeled velocity versus time with horizontal axis time (seconds) and vertical axis velocity (meters per second). A blue line runs straight across at 2 units on the vertical axis for all horizontal axis values.
Based on the graph of velocity over time, which could be the initial velocity and the final velocity for this graph?
initial = 0 m/s; final = 2.5 m/s
initial = 2.5 m/s; final = 2.5 m/s
initial = 3.0 m/s; final = 6.0 m/s
initial = 6.0m/s; final = 3.0 m/s
Answers
Answer:
B
Explanation:
If you dident pay for the no ad thing its okay all u have to do is answer one person's question every day befor you ask a question no ad's just answers you gotta do it every day tho
Answer:
Second option is correct.
The initial and the final velocity for the graph is
initial=2.5m/s; final=2.5m/s.
Explanation:
In given velocity time graph, the line is horizontal and parallel to the x-axis (time-axis).It means the body is moving at the constant velocity.Its acceleration is zero.Explain Velocity-Time graph?The graph plotted between velocity and time, is called velocity time graph.
by it acceleration can be find out.the area of the graph shows distance travelled.it can be plotted in all the quadrants because velocity is a vector quantity.Hence, second option is correct.
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Please write in complete sentences.
How does density affect refraction?
Diamonds are a very dense material. Predict what would happen to the light ray if you projected it from the air through a diamond.
answer both questions
Answers
(1.) The Phenomena of Refraction Occurs when a Ray (Here Light) enters a Relatively Denser or Rarer Medium and Due to the Change in Density, the Speed of the Incident Ray Decreases or Increases Respectively.
(2.) If a light ray projected through a diamond, the light would refract drastically.
Which of these is not a natural source of radiation?
A) Food and drink
B) medical x-rays
C) Cosmic rays
Answers
Answer:
Food and drink
Explanation:
theoretically, you can heat object to a point in which they'll radiate rays, but not food and drinks
as speed (velocity) increases, potential energy increases true or false
Answers
Answer:
true
Explanation:
What is civics?
a. Political involvement as a citizen of a community
b. Protesting, organizing, volunteering to be involved
c. Voting and campaigning to be involved
d. All of the above
Answers
Answer:
D
Explanation:
because civis is the rights and obligations of citizens in society and all A,B,C have a right to a citizen.
Alex rides on a bike that starts from rest and accelerates to a speed of 20 m/s in 8 seconds. What is Alex’s acceleration?
Answers
Answer:
20m/s
Explanation:
Alex's acceleration is also Alex speed
pls answer fast and correct i will give brainlest who ever gets it correct
The boy’s skateboard trips on the stairs and comes to a stop. This shows inertia because:
Answers
If a force of 0.05 N acts on a body of mass 100 grams. Determine the acceleration at which that body moves.
Answers
However first you need to convert g to kg
100g= 0.1kg
0.05/0.1=0.5 m/s^2
Answer:
a=f/m=0.05/0.1kg
Explanation:
calculate it
hope I helped
which structure is larger cell, organ , multicellular or cell structure
Answers
Answer:
organ is larger cell..............
Answer:
organ
Explanation:
I need help as fast as possible please
Will mark BRAINLIST and will give thanks only to correct answers
Thank you so much!
Answers
Answer:
A. enlarged or larger than the object
B. Erect image or not-inverted
C. Virtual
Explanation:
In the given situation, the object is placed between pole and focus of a concave mirror.
So, the image will be formed on the right side of the mirror having size larger than the object; the image will be erect image which means image will appear right side up; and the image will be virtual because image is formed behind the mirror due to divergence of light rays.
Hence, the correct answers are:
"A. enlarged or larger than the object
B. Erect image or not-inverted
C. Virtual"
You arrive in my class 45 seconds after leaving math which is 90 meters away. How fast did you travel?
pls show equation
Answers
Answer:
1/2 seconds per meter
Explanation:
The number of seconds is going to be x
45 ÷ 90 = x
x = 1/2
I mean there are more complicated ways to do it, but this is the easy one :)
Answer:
1/2 per meter
Explanation:
the law of conservation of momentum states that, if left alone what happens to the total momentum of two interacting objects that make up a system
Answers
Answer:
It remains the same
Explanation:
At any point in time the total momentum of two objects interacting remains the same
This follows the laws of space(space is uniform)
Answer:
(Question) Which of these quantities is a vector?
(Answer) momentum
(Question) What is the representation of the momentum vector?
(Answer) an arrow
(Question) What is the formula for the momentum p?
(Answer) p=m⋅v
(Question) What happens to the total momentum in a system of two interacting objects when a net force is exerted upon the system?
(Answer) The total momentum is conserved.
(Question) What is the magnitude momentum of a 2 kg body that moves with a speed of 3 m/s?
(Answer) 6.0
Explanation:
just did the quick check UwU
you've been tired and lethargy what are two possible reasons?
Answers
Explanation:
physical exertion.
lack of physical activity.
lack of sleep.
being overweight or obese.
periods of emotional stress.
boredom.
grief.
taking certain medications, such as antidepressants or sedatives.
FastFood Nation author?
Who is the author of FastFood Nation
Answers
Answer:
Eric Schlosser
Explanation:
I am 100% sure this is the right answer hope it helped:)
You and your friend see a ball rolling across the floor to the right. Your friend says
that because it is moving to the right, it must have a net force on it pushing it to
the right. Do you agree with her? Why or why not?
Your answer
Answers
Answer:
unforturnitly
Explanation:
step unstepable
. Let us say that you put a cup of cold water in one room and a cup of hot water in
another room. Both rooms are at room-temperature. Why does the cold water get
warmer and the hot water get cooler?
Answers
Answer:
In both cases, energy will move from an area of higher temperature to an area of lower temperature. So, the energy from room-temperature air will move into the cold water, which warms the water.
Explanation:
Answer:
this is the answer okkkkkkkkkkkkkkkk
1:A pattern or grouping of stars that people imagine representing a figure, an animal or an object.
2:an object that orbits the sun, is large enough to have been rounded by its own gravity, and has cleared the area of its orbit of any debris.
Answers
Answer:
1.constellation2.Probably a dwarf planetpls help me 6th grade science second two pics are the possible answers
Answers
Answer:
C
Explanation:
Plotting the data points would get the graph closest to C
15 points and will mark as a brainlest PLEASE
Answers
Reason: is the wheels are moving together and so are your feet they are all moving at once.