Please help me!
Neutral atoms of oxygen with a mass of 15 are frequently used in brain imaging technology. Could the atom symbol below be used in this process? Why or why not?
Answers
Answer: No, because the atomic number shown in the symbol (Z = 15) is not the atomic number of oxygen (Z = 8)
Explanation:
When we have an atom, the number in the top left is the mass number A, is equal to the sum between the number of neutrons and protons in the atom.
In this case, between protons and neutrons, we have 32.
The number at the bottom left is the atomic number Z, which is equal to the number of protons in the atom.
Particularly, this number is different for every element. For example, for the oxygen we would have Z = 8, this means that the oxygen has 8 protons.
In the image, we can see Z = 15, then the atom has 15 protons, this means that it can not be oxygen (Z = 15 is for phosphorus, then this atom would be phosphorrs). Then the symbol can not be used, because that is not oxygen.
Related Questions
Define the difference between an independent variable (test variable) and a dependent variable (outcome variable) in a scientific experiment.
Answers
Answer:
Independent- isn't effected by the other variables and is changeable
dependent- is the outcome of the expirment and depends on the other variables
Answer:
a factor that changes due to the independent variable
Explanation:
What is the force on an object of mass 55 kg that is accelerating at 24 m/s2
Answers
Answer:
1320 NExplanation:
The force acting on an object given it's mass and acceleration can be found by using the formula
force = mass × acceleration
From the question we have
force = 55 × 24
We have the final answer as
1320 NHope this helps you
8. What is the S.l unit for mass?
A. kg
B. m/s2
D.N
C. m/s
Answers
Answer:
the answer is kg
Explanation:
because the s.i unit for mass is kilogram
The temperature at which air becomes saturated with water vapor is called the
percent saturation
water content
dew point
relative humidity
thanks in advance
Answers
Answer:
C) Dew Point
Explanation:
The dew point is the temperature at which air is saturated with water vapor, which is the gaseous state of water. When air has reached the dew-point temperature at a particular pressure, the water vapor in the air is in equilibrium with liquid water.
dew point
Explanation: mark me as brainlest
A force of 600N is used to slide a sled across a floor 20 meters . The rope pulling the sled is held at 35 * . How much work does the force do?
Answers
Answer:
9830 J
Explanation:
(Just a tip, you should use the degree symbol ° instead of *)
That being said we know W = F*d*cos(θ). In this case θ = 35°.
W = F*d*cos(θ) = 600*20*cos(35)
= 12000*cos(35)
= 9829.925 Joules
Solution: Work ≈ 9830 J
A 20N bucket is accelerated upward out of a well, by a rope with a force of 75N. What is the acceleration of the bucket
Answers
Answer:
36.76m/s²Explanation:
Given
Weight of the bucket = 20N
Mass = Weight/acceleration due to gravity
Mass = 20/9.8
Mass = 2.04kg
Applied force = 75N
Get the acceleration
According to Newton's second law:
F = ma
a = F/m
a = 75/2.04
a = 36.76m/s²
Hence the acceleration of the bucket is 36.76m/s²
if F = -F represents Newton's third law, then "-F" represents the ________
a. opposite
b. leading
Answers
Answer:
opposite .
Explanation:
Answer: The answer is a) opposite
Explanation: I just completed the USA Test Prep and got a 100! :))
is drinking water a fat, carbohydrate, protein, mineral, vitamin, or water
Answers
Explanation:
drinking water is water... but it is also good for you to drink water...
which statement best describes a chemical reaction?
Answers
Answer:
a chemical reaction is a reaction that happens between two objects, like fire and a potion in chemistry
Explanation:
the reason is that the the fire causes the chemical to react, making a chemical reaction
WILL MARK BRAINLIEST!
TRUE or FALSE? When a large truck pushes a small car with a given force, the small car is applying an equal and opposite force on the truck.
Answers
Answer:
True
Explanation:
Newton's first law of motion states that an object at rest will stay at rest unless acted upon by an outside force.
Answer:
When a large truck pushes a small car with a given force, the small car is applying an equal and opposite force on the truck. Newton's first law of motion states that an object at rest will stay at rest unless acted upon by an outside force.
Explanation:
so its true
An athlete completes one round of circular track of diameter 200 meter in 40 sec. What will be the distance covered and the displacement at the end of 2 meter 20 seconds ?
Answers
Answer:
400m
Explanation:
If An athlete completes one round of circular track of diameter 200 meter in 40 sec, we can write;
200m = 40sec
To determine the distance after 2min 20secs, we can write;
x = 2,min 20sec
x = 80sec
Divide both expression
200/x = 40/80
200/x = 1/2
x = 2×200
x = 400m
Hence the distance covered after 2min 20secs is 400m
What is the difference between epicenter and focus?
Answers
Answer:
The hypocenter is the point within the earth where an earthquake rupture starts. The epicenter is the point directly above it at the surface of the Earth. Also commonly termed the focus.
Explanation:
A gas has a pressure of 150 kPa at a volume of 6 m3. Calculate the volume of the same mass of gas at a pressure of 425 kPa
Answers
Answer:
V2 = 2.12 m³
Explanation:
Given the following data;
Original pressure, P1 = 150 kPa
New pressure, P2 = 425 kPa
Original volume, V1 = 6 m³
To find the new volume V2, we would use Boyles' law.
Boyles states that when the temperature of an ideal gas is kept constant, the pressure of the gas is inversely proportional to the volume occupied by the gas.
Mathematically, Boyles law is given by;
[tex] PV = K[/tex]
[tex] P_{1}V_{1} = P_{2}V_{2} [/tex]
Substituting into the equation, we have;
[tex] 150 * 6 = 425V_{2} [/tex]
[tex] 900 = 425V_{2} [/tex]
[tex] 900 = 425V_{2} [/tex]
[tex] V_{2} = \frac {900}{425}[/tex]
[tex] V_{2} = 2.12[/tex]
Therefore, the new volume of the mass of gas is 2.12 cubic metre.
How do fossils provide evidence of continental drift?
A. Similar fossils are found all over the world.
B. The same fossils were found on land and under the ocean.
C. The same fossils were found on different continents.
D. The fossils show a record of climate change.
Answers
newton's first law equations like velocity and stuff like that
Answers
Answer:
Newton's first law: An object at rest remains at rest, or if in motion, remains in motion at a constant velocity unless acted on by a net external force. ... An object sliding across a table or floor slows down due to the net force of friction acting on the object.
Explanation:
please give me a heart
The Electron Cloud Model shows shaded regions of probabilty where the electons most likely are at a given point in time. True False
Answers
Answer:
True
Explanation:
The statement is true because According to Schrödinger it's not possible to get the exact position of where an electron is located. However, he showed from an equation that we can at determine the most likely area where an electron will be and he said they are most likely to be in the most dense area of the clouds.
Answer:
it is true
Explanation:
3
The ion of an element has 3 positive charges. Mass Number of
I Neutrons is ly. What is the of electrons in the song.
Answers
Answer:
3 electron hai bro of puch mujhe sab aata h
A force off 700 newtons is applied to a 600 kg bowling ball. What is the acceleration of the bowling ball once the force is applied?
Answers
Answer:
1.17 m/s²Explanation:
The acceleration of an object given it's mass and the force acting on it can be found by using the formula
[tex]a = \frac{f}{m} \\ [/tex]
f is the force
m is the mass
From the question we have
[tex]a = \frac{700}{600} = \frac{7}{6} \\ = 1.1666666...[/tex]
We have the final answer as
1.17 m/s²Hope this helps you
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Choose the correct answer for the following sentences and give the
reason for your answer.(10 marks)
(i) The product of power into focal length for a lens is equal to
(ii)
(a) One (b) ten
(c) one hundred
The human eye has a lens of focal length +5 cm. The power of the
eye is
(a) 0.05 D
(b) 5 D
(c) 20 D
A transparent rod in which successive total internal reflection can
occur is called
(a) A light pipe (b) a thin prism (c) total internal
reflection
The wavelength of visible light is between
(a) 400 nm to 700 nm (b) 40 km and 70 km (c) 20 mm to 200
(iv)
mm
(v)
The SI unit for wave intensity is
(a) Js
(b) Wm?
-1
(c) Wmk1
Answers
Answer:
Explanation:
A wave has a frequency of 900 Hz and a wavelength of 200 m. At what speed is this wave traveling?
Answers
Answer:
The velocity of the wave is, v = 180,000 m/s
Explanation:
Given data,
The frequency of the wave, f = 900 Hz
The wavelength of the wave, λ = 200 m
The formula for the speed of the wave when the frequency and wavelength are known,
v = λ x f
Substituting the given values in the above equation,
v = 200 m x 900 Hz
v = 180000 m/s
Hence, the velocity of the wave is, v = 180,000 m/s
What factors affect the amount of potential energy an object has?
Answers
Answer:
The factors that affect an object's gravitational potential energy are its height relative to some reference point, its mass, and the strength of the gravitational field it is in.
Explanation:
The factors that affect the amount of potential energy an object has are its mass, gravity, and height. This is further explained below.
What is potential energy?Generally, potential energy is simply defined as the energy held by a body as a result of its location with relation to others, internal tensions, electric charge, and other elements
In conclusion, The potential energy of a body is given by P.E=mgh
Read more about Energy
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Food that is cooked properly can no longer be contained. True or false
Answers
Answer:
true they can no longer be contained
find momentum, when mass = 20kg and velocity = 5 m/ sec ?
Answers
Answer:
the momentum is 100 bas p=mv
The more conductive an object is, the easier it is for neutrons to go through the object.
True
False
Answers
Answer:
false bcz neutrons do not move they r fixed in nucleus so it will. Fallse
The interval shown here represents a _____.
strong base
weak base
weak acid
strong acid
Answers
Answer:
Strong acid
Explanation:
.... ..............
What is the acceleration of a 7 kg mass if the force of 70 N is used to move it toward the Earth?
Answers
Answer:
10 m/s²Explanation:
The acceleration of an object given it's mass and the force acting on it can be found by using the formula
[tex]a = \frac{f}{m} \\ [/tex]
m is the mass
f is the force
From the question we have
[tex]a = \frac{70}{7} = 10 \\ [/tex]
We have the final answer as
10 m/s²Hope this helps you
You shove a chair with wheels(and let it go)and it starts moving across the floor. However,the chair soon shows down and comes to a complete stop. To keep the chair moving,you need to keep pushing on it.
This simple experiment implies that ;
A) Newton's first law,or the law of inertia,does not apply to a chair moving horizontally
B) The action-reaction forces act on the chair and cancel each other
C) A net force in the direction opposite to the motion of the chair acts to slow it down
D) The weight of the chair slows it down
Answers
Answer:
Personally I think, that the answer is B.
Explanation:
WILL MARK BRAINLIEST
TRUE or FALSE?If you are an astronaut slowly drifting away from the space station, you might be able to drift back to the station by throwing a 5-kg tool rapidly in the direction that you are traveling (away from the station).
Answers
Answer:
yes every action as an equal and and opposite reaction. if you throw a tool then it will give you a reaction and you will move back.
Explanation:
According to Newton's third law of motion, when two bodies interact between them, appear equal forces and opposite senses in each of them.
To understand it better:
Each time a body or object exerts a force on a second body or object, it (the second body) will exert a force of equal magnitude but in the opposite direction on the first.
So, if you as an astronaut in the described situation throw your tool in the direction that you are traveling (in the opposite direction of the space station), according to Newton's third law, you will be automatically moving towards the station
A compact car moving at 60 m/s has 320,000 J of kinetic energy. What is its mass?
Answers
Answer:
320,000J
Explanation:
mass=320,000J
A bird flying towards its nest has a mass of 0.25kg and a kinetic energy of 40.5J. What is the speed of the bird?
Answers
Hope it’s correct