Answer:Valence electron
The family properties in the periodic table are determined by the number of valence electrons, and chemical properties are influenced by protons and valence electrons. Atoms with the same number of protons but different neutrons are isotopes, maintaining the element's identity.
Each family in the periodic table has its own characteristic properties based on the number of valence electrons. The periodic table organizes elements by increasing atomic number, which is defined by the number of protons within the nucleus of an atom. The chemical properties of an element are primarily determined by its number of protons and valence electrons. Atoms with the same number of protons but differing numbers of neutrons are known as isotopes and do not change the element's location in the periodic table. For example, carbon will always have six protons, regardless of the number of neutrons; thus, it retains its chemical identity as carbon.
Carbon-14 is a radioactive element that undergoes beta decay. Which force is responsible for allowing carbon-14 to become
stable?
electromagnetic
gravitational
weak nuclear
strong nuclear
The weak nuclear force is responsible for allowing carbon-14 to become stable. Thus, the correct option is C.
What do you mean by Radioactivity?Radioactivity may be defined as the process of the liberation of energy from the decay of the nuclei of certain types of atoms and isotopes.
During the process of radioactivity decay, a beta particle is terminated which leads to one neutron changing into a proton inducing carbon-14 to become nitrogen-14 which is more stable than carbon-14.
Therefore, the correct option for this question is C.
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ANSWER FAST FOR BRAINLIEST
An optical telescope is an instrument that collects and _____.
reflects light from distant objects
focuses light from very small objects
stores heat from distant objects
focuses light from distant objects
Answer:
focuses light from distant objects
The last alternative is correct
Explanation:
An optical telescope is an instrument that collects and focuses light from distant objects.
An optical telescope is an instrument designed to make distant object appear nearer.
Answer:
distant
Explanation:
what information does a free body diagram show
Answer:
show the relative magnitude and direction of all forces acting upon an object
Explanation:
A free body diagram shows all the forces acting on a body. It gives the magnitude and direction of the number of forces acting on an object when it is in equilibrium.
For example,
When a force applied to an object is F. The force of friction also acts on it in opposite direction. Its weight is also acting in vertically downward direction. One normal is also acting on it.
It shows that all type of forces acting on the object i.e. normal force, gravitational force, frictional force and the applied force.
if you leave a fan on in a room even if its not pointed towards the person, does the room still get cooler?
A fan never 'cools' a room. It has no way to change the temperature of anything.
A fan does nothing but MOVE air, and air that's MOVing FEELS cooler on human skin than air that's NOT moving, even at the same temperature. Non-living objects, and most animals, don't feel any difference on account of a fan.
It doesn't matter whether the room is open or closed. If the air in the room is moving, then a PERSON in the room will FEEL cooler than if the air is not moving.
Answer:
no the room does not change temperature
Two identical charges, each -8.00 E-5 C, are separated by a distance of 20.0 cm (100 cm = 1 m). What is the force of repulsion? Coulomb's constant is 9.00 E9 N*m2/C2
Remember to identify all data (givens and unknowns), list equations used, show all your work, and include units and the proper number of significant digits to receive full credit.
Answer:
1440 N
Explanation:
The electrostatic force between the two charges is given by:
[tex]F=k\frac{q_1 q_2}{r^2}[/tex]
where:
[tex]k=9.00 \cdot 10^9 N m^2 C^{-2}[/tex] is the Coulomb's constant
[tex]q_1 = q_2 = -8.00 \cdot 10^{-5} C[/tex] is the value of each charge
r = 20.0 cm = 0.20 m is the separation between the charges
Substituting numbers into the equation, we find
[tex]F=(9\cdot 10^9 N m^2 C^{-2} )\frac{(-8.00 \cdot 10^{-5}C)^2}{(0.20 m)^2}=1440 N[/tex]
In the genetic disorder called _____, there is an extra chromosome in the twenty-first pair.
Answer:
I think it's called "Down syndrome."
Explanation:
Hope my answer has helped you!
Identify some abiotic characteristics of the tundra biome.
What could be a possible explanation why tectonic plates do not all move in the same direction
Answer:
because the lava underneath the plate was moving in different directions leading to the separation of pangea
Explanation:
using second law of motion derive the relation between force and acceleration
Answer:
f=ma
Explanation:
According to second law of motion Force is directly proportional to rate of change of momentum.
so F is directly proportional to [tex]\frac{dp}{dt}[/tex]
we know that momentum P= MV
so
[tex]f=d(mv)/dt=m\frac{dv}{dt}[/tex]
thus we get F=ma.
Answer:
Let F be external force applied on the body in the direction of motion of the body for time interval [tex]\sf \Delta t[/tex], the the velocity of a body of mass m changes from [tex]\sf v [/tex] to [tex]\sf v + \Delta v[/tex] i.e. change in momentum, [tex]\sf \Delta p = m \Delta v [/tex].
According to Newton's second law :
[tex]:\implies \sf F \propto \dfrac{\Delta p}{\Delta t} \\ \\ \\ [/tex]
[tex]:\implies \sf F = k \: \dfrac{\Delta p}{\Delta t} \\ \\ \\ [/tex]
Where k is a constant of proportionality.
If limit [tex]\sf \Delta t \rightarrow 0,[/tex] then the term [tex]\sf \dfrac{\Delta p}{\Delta t}[/tex] becomes the derivative [tex]\sf \dfrac{dp}{dt}[/tex].
Thus,
[tex]:\implies \sf F = k \: \dfrac{dp}{dt} \\ \\ \\ [/tex]
For a body of fixed mass (m), we have :
[tex]:\implies \sf F = k \dfrac{d(mv)}{dt} \\ \\ \\ [/tex]
[tex]:\implies \sf F = km \: \dfrac{dv}{dt} \\ \\ \\ [/tex]
[tex]:\implies \sf F = kma \\ \\ \\ [/tex]
If v is fixed and m is variable then :
[tex]:\implies \sf F = \dfrac{kd(mv)}{dt} \\ \\ \\ [/tex]
[tex]:\implies \sf F = \dfrac{kvdm}{dt} \\ \\ \\ [/tex]
because, k = 1 then :
[tex]:\implies \sf F =\dfrac{vdm}{dt}[/tex]
Now, a unit force may be defined as the force which produces unit acceleration in a body of unit mass :]
So,
F = 1
m = 1
a = 1
k = 1
So,
[tex]:\implies \underline{ \boxed{ \sf F = ma}}[/tex]
what ocean depth would the volume of an aluminium sphere be reduced by 0.10%
Answer:
6400 m
Explanation:
You need to use the bulk modulus, K:
K = ρ dP/dρ
where ρ is density and P is pressure
Since ρ is changing by very little, we can say:
K ≈ ρ ΔP/Δρ
Therefore, solving for ΔP:
ΔP = K Δρ / ρ
We can calculate K from Young's modulus (E) and Poisson's ratio (ν):
K = E / (3 (1 - 2ν))
Substituting:
ΔP = E / (3 (1 - 2ν)) (Δρ / ρ)
Before compression:
ρ = m / V
After compression:
ρ+Δρ = m / (V - 0.001 V)
ρ+Δρ = m / (0.999 V)
ρ+Δρ = ρ / 0.999
1 + (Δρ/ρ) = 1 / 0.999
Δρ/ρ = (1 / 0.999) - 1
Δρ/ρ = 0.001 / 0.999
Given:
E = 69 GPa = 69×10⁹ Pa
ν = 0.32
ΔP = 69×10⁹ Pa / (3 (1 - 2×0.32)) (0.001/0.999)
ΔP = 64.0×10⁶ Pa
If we assume seawater density is constant at 1027 kg/m³, then:
ρgh = P
(1027 kg/m³) (9.81 m/s²) h = 64.0×10⁶ Pa
h = 6350 m
Rounded to two sig-figs, the ocean depth at which the sphere's volume is reduced by 0.10% is approximately 6400 m.
Water that contains a larger than normal amount of __________ is still safe to drink.
a. sulfur b. arsenic c. lead d. magnesium
Answer:
Water that contains a larger than normal amount of magnesium is still safe to drink.
Explanation:
Sulfur, lead and arsenic are harmful metals that are toxic to human health. Although magnesium present at high concentrations (above approximately 250 mg/l each) can have a laxative effect. However, data suggest that consumers adapt to these levels as exposures continue.
Answer:magnesium
That's the answer
disadvantages and advantages of digit and analog signals
Answer:
Pros and Cons of Analog Signals: Advantages: major advantages of the analog signal is infinite amount of data. Density is much higher. easy processing. Disadvantages: Unwanted noise in recording. If we transmit data at long distance then unwanted disturbance is there.
Explanation:
Answer:
Pros and Cons of Analog Signals: Advantages: major advantages of the analog signal is infinite amount of data. Density is much higher. easy processing. Disadvantages: Unwanted noise in recording. If we transmit data at long distance then unwanted disturbance is there.
Explanation:
How many quarts are in 2.50L
Answer:
Around 2.64172 quarts
Explanation:
Which type of material is good at transferring heat?
Answer:
Metals
Explanation:
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PLS ANSWER ASAP
Four identical lab carts each have a mass of 200 kg. Different masses are added to the carts and the velocities are measured. All carts move to the right.
Which cart has the greatest momentum?
cart A
cart B
cart C
cart D
Answer:
Cart A
Explanation:
Momentum can be computed by finding the product of mass and velocity. To solve this, you can use the formula below to find the greatest momentum:
p = mv
where:
p = momentum (kgm/s) m = mass (kg) v = velocity (m/s)
Because carts are moving along with the weights, we need to consider the whole system. This means that you need to add in the masses and the mass of the cart.
Cart A:
m = 200kg + 0 kg = 200 kg
v = 4.8 m/s
p = 200kg x 4.8 m/s = 960 kg-m/s
Cart B:
m = 200kg + 20 kg = 220 kg
v = 4.0 m/s
p = 220kg x 4.0 m/s = 880 kg-m/s
Cart C:
m = 200kg + 40 kg = 240 kg
v = 3.8 m/s
p = 240kg x 3.8 m/s = 912 kg-m/s
Cart D:
m = 200kg + 60 kg = 260 kg
v = 3.5 m/s
p = 260kg x 3.5 m/s = 910 kg-m/s
As you can see, Cart A has the greatest momentum.
Answer: A
Explanation: I took the test
WILL MAKE YOU BRAINLIEST PLEASE ANSWER THIS!!!!!
How do scientists determine motion of objects in the universe?
A) big bang theory
B) Doppler effect
C) heliocentric theory
D) geocentric theory
Answer:
B) Doppler effect
Explanation:
Scientists use the Doppler effect to determine motion of objects in the universe.
Answer:
B) Doppler effect
Explanation:
Think about the tools scientists use to collect evidence.
Here is proof that my answer is correct:
A 1,160 kg satellite orbits Earth with a tangential speed of 7,446 m/s. If the satellite experiences a centripetal force of 8,955 N, what is the height of the satellite above the surface of Earth? Recall that Earth’s radius is 6.38 × 106 m and Earth’s mass is 5.97 × 1024 kg.
Answer: The height of the satellite above the surface of Earth is [tex]8.02\times 10^{5}m[/tex]
Explanation:
Given
Mass of the satellite, m= 1160 kg
tangential speed , v = 7446 m/s
Centripetal force , F = 8955 N
Radius of earth , R= [tex]6.38\times 10^{6}[/tex] m
Let height of satellite above surface of the Earth be H
Centripetal force on satellite is given by
[tex]F=\frac{mv^{2}}{R+H}[/tex]
=>[tex]H=\frac{mv^{2}}{F}-R[/tex]
=>[tex]H=(\frac{1160\times 7446^{2}}{8955}-6.38\times 10^{6}) m=8.02\times 10^{5}m[/tex]
Thus the height of the satellite above the surface of Earth is [tex]8.02\times 10^{5}m[/tex]
Answer:
8.02 x 10^5 m
Explanation:
8.02 x 10^5 m
A 3500 W motor does 8000 J of work when it lifts a Rhinoceros 30.0 m. How long did this take?
Answer:
The answer is 2.28 seconds
Explanation:
Given data:
Work done = 8000J
Distance , d = 30 m
Power , P =3500 W
We know that
(a) Work done = force × distance
8000 J = F x 30 m
F = 8000 J / 30 m
= 266 N
(b) Power = work done / time taken
3500 W = 8000 J/ time taken
3500 W x time taken = 8000 J
Time taken = 8000 J / 3500 W =2.28 s
Jackson is designing a new heater, and he wants to experiment with different thermally conductive materials. Which of these materials would be useful in conducting heat?
Answer:
metal
Explanation:
metal is an excellent conductor for heat and electricity therefore making it perfect to experiment with different temperatures.
Heidi and Heather take a 30 minute walk eastward along a straight road to a store 2.0 km away. What is their average velocity in m/s?
Average velocity =
(distance and direction of their change in location)
divided by
(time for the change) .
Distance and direction of their change in location = 2.0 km east (their "displacement")
Time for the change = 30 minutes
Average velocity = (2.0 km east) / (30 minutes)
Average velocity = (2/30) (km east/minute)
Average velocity = 0.067 km/min east
or
Average velocity = 4.0 km/hr east
Just to be difficult, the question specifies that the answer must be given in units of m/s. Is no problema for nosotros:
Average velocity = (4.0 km-east/hour) x (1,000 m/km) x (1 hour/3600 sec)
Average velocity = (4 x 1,000 / 3,600) (km-east-meter-hr / hr-km-sec)
Average velocity = 1.111... m/s East
Answer:
thanks for the asnwer
Explanation:
The Mariana Trench is the deepest ocean trench on. This trench occurs at a plante boundary where
The Mariana Trench is the deepest ocean trench, located at a convergent plate boundary in the abyssal zone with depths reaching about 11,000 meters. High pressure, low nutrient content, and lack of light characterize this zone, where chemosynthetic bacteria at hydrothermal vents form the base of the food chain.
Explanation:The Mariana Trench is known as the deepest ocean trench, residing at a depth that places it within the abyssal zone. This trench is located at a convergent plate boundary, a region where oceanic plates meet and one is forced beneath the other, creating a subduction zone. The Challenger Deep, within the Mariana Trench, reaches about 11,000 m (approximately 6.8 miles) deep. At these depths, there is high pressure and low nutrient content, and no light penetrates to allow photosynthesis. Therefore, organisms such as chemosynthetic bacteria form the base of the food chain, utilizing minerals from hydrothermal vents for energy.
Heat is transferred from the heating element to the pot to the boiling water. What is the MOST likely method of heat transfer?
A) circulation
B) conduction
C) convection
D) radiation
The most likely method of heat transfer from the heating element to the pot to the boiling water would be conduction, as it is the process by which heat is transferred through direct contact.
Explanation:The most likely method of heat transfer described in the question would be conduction. This is the process that takes place when heat is transferred through direct contact between materials. In the case described in the question, the heating element comes into direct contact with the pot, and then the pot comes into direct contact with the boiling water, thus the heat is transferred from one to the other. This is conduction.
It's also interesting to note the other forms of heat transfer for comparison. Convection is the process of heat transfer by actual movement of matter; it can't happen through solid materials, such as between a pot and the heating element, but only through liquids, gases, and plasma. On the other hand, radiation is the transfer of energy by electromagnetic waves and doesn't require a medium (such as air, or a metal pot) to happen.
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What is the oxidation state of rubidium (Rb)?
Answer:
The answer is rubidium exhibits +1 and -1 oxidation states.
Explanation:
Rubidium is a reactive element and belongs to the group 1 of the periodic table. It is an alkali metal and it is a highly reactive element.
Rubidium is a very soft and white lustrous element. Rubidium has +1 and -1 oxidation states. When rubidium is burnt, it forms oxides, superoxides and peroxides respectively.
For example, in rubidium oxide (Rb2O), Rubidium has a +1 oxidation state. While in peroxides rubidium exhibits -1 oxidation state. For example Rubidium peroxides (Rb2O2).
Groups of organs that work together to complete a process in the body are called:
A. cells
B. tissues
C. nerves
D. systems
Answer:
systems
Explanation:
they are a bunch of things functioning together
Answer:
D. systems, termed as "organ system".
Explanation:
The organ system is a system that consists of a group of organs that work together to ensure that the organism continues to survive.
Tissues are next in creating the specific organs, and are generally classified depending on the organ it is part of. Note that not all tissues are the same.
Cells are "the smallest", and groups of cells create tissues.
Nerves are part of the Nervous system, which helps provide sensory to the body to help react when the body comes into contact with something that may hurt body parts.
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ANSWER FAST!
Which lens can produce a virtual image and a real image?
concave lens
convex lens
flat lens
Answer:
Convex lens.
Explanation:
This lens forms real images (images that can be focused on a screen when the object is beyond a distance beyond F the focal length of the lens.
If the object distance is less than the focal length( In front of the focal point or between the focal point and the pole of the lens) , the lens forms a virtual enlarged image,
Answer:
Convex lens.
Explanation:
This lens forms real images (images that can be focused on a screen when the object is beyond a distance beyond F the focal length of the lens.
If the object distance is less than the focal length( In front of the focal point or between the focal point and the pole of the lens) , the lens forms a virtual enlarged image,
Which of the following is a benefit of globalization?
Globalization facilitates international trade, leading to increased wealth, better and less expensive products for consumers, and higher incomes for employees of successful businesses. It also creates international awareness and serves as a political counterbalance to domestic protectionism.
Explanation:One of the key benefits of globalization is the potential for increased wealth across nations. Through reductions in tariffs, quotas, and other trade barriers, as well as improved transportation and communication technologies, globalization has driven down costs. This has facilitated international trade, allowing consumers to enjoy better and less expensive products and businesses to tap into larger markets, thereby increasing their profits. Employees of these successful businesses can also benefit from higher incomes.
Another advantage is the creation of international awareness and empowerment, promoting cultural exchange and international cooperation. Lastly, international agreements and treaties can act as a counterweight to domestic special interest groups, helping to prevent protectionist policies that could otherwise harm global economic progress.
Which are the main regions of the periodic table? A. metals, nonmetals, gases B. solids, liquids, gases C. metals, semimetals, nonmetals
Answer:
the answer is C.
Explanation:
Answer:
On Edge it is A, D, E.
Explanation: Have a nice day
When doing scientific research ,the sources used should be ?
Answer: Reliable and trusted
The sources used in the scientific research purpose should be reliable.
Explanation:
In doing the scientific research, the sources must not be of popular kind but should be representative kind which could represent the material and method adopted in the research very well. The sources are never termed as new or old sources, as the source is not bounded by time but space.
The source applicability is defined by the parameter used in the specified location and not time. Therefore, the source must be reliable which could give definite information and trustworthy.
Which of the following is not a characteristic of S waves?
a.
travel slower than P waves.
b.
cannot be detected in locations more than 105° from an earthquake’s epicenter.
c.
travel through solids and liquids.
d.
only affect coastal regions.
How many hydrogen (H) atoms are in one molecule of sulfuric acid, H2SO4? (1 points) 1 2 4 7
Answer:
Explanation:H2 which is mean 2 atoms of hydrogen
Answer:
2
Explanation: