Nitrogen attains the noble gas structure by gaining three electrons.
Stability of atoms has been associated with an atom having two or eight electrons in its outermost shell. This generally referred to as the octet rule. The octet rule is the basis for predicting the stability of atoms.
Nitrogen has an electron configuration of 1s2 2s2 2p3 in the ground state. However, when it accepts three electrons to form the stable nitride ion N^3-, its electron configuration becomes 1s2 2s2 2p6.
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If you are given distance and a period of time what can you calculate
speed
i took the test just know and put velocity and it was wrong. it said the answer was speed
Given distance and a period, we can calculate speed, angular velocity, frequency, and even time dilation effects. Speed is calculated using the formula v = d/t.
If you are given distance and a period, you can calculate several interesting physics concepts. One fundamental calculation would be speed or velocity since speed equals distance divided by time (v = d/t). If the movement occurs at a constant speed, this is straightforward. However, suppose the speed varies or involves a pendulum or circular motion. In that case, you can dive into more specific calculations such as angular velocity, frequency, and time dilation effects in relativity for movements approaching the speed of light.
For example, the period T of an object moving back and forth with a constant speed v over a distance 2L, such as a pendulum, can be calculated using T = 2L/v. Similarly, the frequency, f, of such an oscillating system is found using f = 1/T. These concepts apply to various systems, including satellites orbiting a planet where the period is related to the orbital distance from the center of the celestial body.
What is the mass of a stone moving at a speed of
15 meters/second and having a momentum of
7.5 kilogram·meters/second?
a. 0.5 kilograms
b. 1.5 kilograms
c. 11 kilograms
d. 1.1*10² kilograms
Answer: A 0.5kg
Explanation:
Momentum is defined as the product of mass and velocity of a body.
Momentum = mass × velocity
Mass = ?
Momentum = 7.5kgm/s
Velocity = 15m/s
Mass = Momentum/Velocity
Mass = 7.5/15
Mass = 0.5kg
If this were a theoretical frictionless plane, what would be the mechanical advantage?
H + 9H = 10H
H ÷ 9H = 1 ÷ 9
9H ÷ H = 9 ...?
Answer:
B, h=9
Explanation:
A 490 n (her weight due to gravity) woman is standing on bathroom scale. what is the woman's mass in kilograms
Only a change in temperature can bring about a change in state. A change in pressure cannot bring about a change of state.
True
False Only a change in temperature can bring about a change in state. A change in pressure cannot bring about a change of state.
True
False
Answer:
The answer is False
Explanation:
Pressure is understood as a force exerted by a gas, a liquid or a solid on a surface. An increase in pressure tends to favor volume contraction. For example, the lower the pressure exerted on the surface of a liquid, the easier it is to vaporize, because the molecules of the liquid find less resistance to leave it and transform into steam.
Which of the following is a poor electrical insulator?
A) Plastic
B) Glass
C) Wood
D) Wood
E) Sea Water
Final answer:
Option E) Sea Water is a poor electrical insulator among the given options, which include Plastic, Glass, Wood, and Sea Water, because the free ions in sea water enable it to conduct electricity well.
Explanation:
The question asks which of the given options is a poor electrical insulator. A poor electrical insulator would be a good conductor of electricity. Out of the options provided (Plastic, Glass, Wood, and Sea Water), option E) Sea Water is a poor insulator because it contains a high concentration of free ions, making it a good conductor of electricity. This is in stark contrast to materials like plastic, glass, and wood, which are known to be good insulators because they do not allow charges to move through them easily.
Materials like Styrofoam, fiberglass, and goose-down feathers are also mentioned as examples of good insulators, as they contain small pockets of air which is a poor conductor of heat. However, for electrical insulation, air's thermal properties are less relevant than its ability to prevent electric charge movement. When discussing electrical insulators, it's important to note that the presence of free ions, as found in Sea Water, can lead to better conductivity of electricity, making it a poor electrical insulator.
Lava blown out of a volcano in explosive eruption is called pumice. True False
The claim that lava blown out of a volcano is called pumice is False; pumice is a volcanic rock formed from cooling lava with trapped gas, not the lava itself.
Explanation:The statement that lava blown out of a volcano in an explosive eruption is called pumice is False. Pumice is not lava itself, but rather a type of volcanic rock that forms when frothy lava cools and solidifies with a high volume of gas bubbles trapped inside. Pumice is a vesicular felsic igneous extrusive rock that is light enough to float on water due to its numerous gas bubble cavities giving it a very low density.
Pumice is characterized by a frothy texture and typically takes on a whitish, light grayish, or very light brown color. Most notably, pumice has a high porosity because of the many gas bubbles that were present in the originating lava. While pumice results from volcanic eruptions, it is the solid portion that forms from rapidly cooling lava with trapped gas bubbles, distinguishing it from molten lava ejected during an eruption.
In the context of volcanic fragmental rocks such as tuff, pumice fragments can be found within a light-colored volcanic ash. These rocks are formed by explosive volcanic eruptions that blast solid fragments and ash into the atmosphere.
Which makes fast-moving water a greater force of erosion?
A.
greater heat capacity
B.
greater energy
C.
increased density
D.
greater oxidation
Answer:
B. Greater energy
Explanation:
Fast moving water is very energetic as its can displace very large rocks, boulders and make pebbles and sand out of them through the process r erosion. Fast moving water have kinetic energy, it opposes anything that come in its way. As river make its own channel by eroding plane. Many antecedent rivers have make their channel by cutting large mountains too.
A red train traveling at 72 km/hr and a green train traveling at 144 km/hr are headed toward one another along a straight level track. When they are 950 meters apart, each enginneer sees the other's train and applies the brakes. The brakes decelerate each train at the rate of 2.0 m/s^2. Is there a colllision? If so, what is the speed of each train at impact? If not, what is the separtion between the trains when they stop?
Explain what happens to the particles in a substance during a physical change.
Explanation:
Physical change is a change in which there is no change in chemical composition of the substance.
For example, when we freeze liquid water then it changes into solid, that is, only physical state of water has changed and no change in chemical composition.
Therefore, in a physical change there is change only in the arrangement, energy and movement of particles.
The strength of a rectangular beam varies jointly as its width and the square of its depth. If the strength of a beam 12 inches wide by 22 inches deep is 3400 pounds per square inch, what is the strength of a beam 9 inches wide and 18 inches deep?
What is the volume of a gold nugget that weight 2.20kg. the density of gold is 19g/cm^3 ...?
Terry, a 70-kilogram tailback, runs through his offensive line at a speed of 7.0 m/sec. Jared, a 100-kilogram linebacker, running in the opposite direction at 6.0m/s, meets Jared head-on and “wraps him up.” What is the result of this tackle?
a car traveling at a speed of 13 meters per second accelerates uniformly to a speed of 25 meters per second in 5.0 seconds.
-a truck traveling at a constant speed covers the same total distance as the car in the same 5.0 second interval. Determine the speed of the truck.
-Calculate the magnitude of the accelerate of the car during this 5.0 second interval.
What will happen to the gravitational force between stars as the universe continues to expand? ...?
Answer:
In a galaxy, the expansion of the universe actually does not have any effect, because the force of gravity is enough to kinda keep the celestial bodies in their orbits.
Now, the expansion can be seen between galaxies (according to the Hubble's law, the far away is the galaxy, the faster it seems to move away), so the forces between stars actually will not really change, and the forces that the stars are experiencing by bodies in other galaxies are almost depreciable, so nothing will happen.
When an ideal gas does positive work in its surroundings, which of the ga's quantities increases?
Volume
Internal energy
Pressure
Temperature
The system gains energy and the sign of w is positive if work is done on it. According to the principle of energy conservation, every change in the system's energy must take into account both the energy it has received and lost. Thus, option B is correct.
What internal energy positive work in its surroundings?An interaction with its environment causes a system's internal energy to decrease. The internal energy of a system grows when work is done on it.
The energy change from work always takes place as part of a process, much like the energy change from heat: a system can perform work, but it doesn't contain work.
Therefore, when the system makes an impact on the environment, we characterize work as being positive (energy leaves the system). The work is negative if it is done to the system (energy added to the system).
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Newton's first law of motion states that an object remains at rest unless a(n) ____ force acts on it.
Newton's first law of motion states that an object remains at rest unless a(n) external force acts on it.
What is Newton's first law of motion?
Newton's first law can be defined as if an object is at rest it remains at rest, or if in motion, remains in motion which has a constant velocity unless acted on by a net external force.
The equation for Newton’s first law is as follows:
F = dp /dt
or
F = d(mv)/dt
In this statement, p is the momentum. As p=mv, the second equation replaces p with mv. V is the object’s velocity, t is the time, and F is for force.
Newton's first law can also be called as the law of inertia because inertia refers to the amount of resistance of an object can be related to a velocity change. Here, Velocity change can be described in terms of the speed of the object or its direction.
When we known with the different part of inertia is the tendency to continue which moves in the same direction line at a constant speed when no forces act on them. Thus, it can be described as an object remains at rest unless an external force acts on it.
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Final answer:
Newton's first law of motion, or the law of inertia, indicates that an object at rest stays at rest and an object in motion maintains its velocity unless acted on by a net external force.
Explanation:
Newton's first law of motion, also known as the law of inertia, states that an object remains at rest or if in motion, continues to move at a constant velocity unless acted upon by a net external force. This principle explains why an object will not change its state of motion unless a force is applied to it. For example, a soccer ball on the ground will not move until a player kicks it, applying a net external force to overcome its inertia.
The bending of wave crests as the reach shallow water is:
The bending of wave crests as they reach shallow water is called refraction, occurring alongside shoaling, which results in increased wave heights. Refraction is caused by the variation in wave speed due to different water depths. When waves become too tall relative to their wavelength, they break, often curling forward.
The bending of wave crests as they reach shallow water is known as refraction. This phenomenon occurs because different segments of the wave crest experience changes in wave speed due to the varying depths of water they encounter. The sections of a wave crest in deeper water travel faster compared to those in shallower water, causing the wave to bend and tend to align more parallel to the shoreline. As waves reach shallow water, there is also an increase in wave height due to the shoaling effect, where the energy of the wave is compressed into a smaller volume of water. The process of waves becoming more asymmetric and experiencing changes in their crest and trough structure is a result of both shoaling and refraction.
Moreover, when a wave 'touches bottom' in shallow water, the friction causes the wave to slow down and the wavelength to decrease while the wave height increases. When the wave height becomes too high relative to the wavelength, the wave becomes unstable and forms a breaker. The top part of the wave moves faster than the bottom, due to less friction encountered by the seafloor, often resulting in a forward curling motion as the wave breaks.
Which of the following is true of both nuclear fusion and nuclear fission?
a.
They both require a high energy input.
b.
They both occur without byproducts.
c.
They both have a high energy output.
d.
They both involve large atoms breaking into smaller atoms.
Answer:
c. They both have a high energy output.
Explanation:
- Nuclear fusion is the process in which two lighter nuclei combine together into a heavier nucleus
- Nuclear fission is the process in which a heavier nucleus breaks apart into smaller nuclei
In both cases, a huge amount of energy is released. In fact:
- In the nuclear fusion, the mass of the heavier nucleus is slightly lower than the sum of the masses of the two initial nuclei: this means that part of the initial mass has been converted into energy, according to the equation
[tex]E=mc^2[/tex]
and we can see that even for small amount of mass, m, the energy released is huge
- In the nuclear fission, the mass of the final products is less than the mass of the initial heavier nucleus, so again, part of the initial mass has been converted into energy, according to the equation
[tex]E=mc^2[/tex]
a. They both require a high energy input. No. Fission doesn't require ANY energy input to get going.
b. They both occur without byproducts. No. The by-products of fission are the biggest real problem in commercial nuclear power . . . where to put the bad stuff that's left over.
c. They both have a high energy output. Yes !
d. They both involve large atoms breaking into smaller atoms. No. 'Fission' involves large nucleii breaking into smaller ones. 'Fusion' is exactly the opposite ... combining small nucleii into more complex ones.
Chandra notices that her bicycle tires have a higher pressure during the hot summer than during the cold winter. Which gas law explains her observation? Explain your answer.
The Gay-Lussac law can clarify this, which states that if the temperature rises in the summer, the pressure should rise as well in order for K to remain constant.
What is Gay-Lussac law?Gay-law Lussac's is most commonly associated with Joseph-Louis Gay-law Lussac's of combining volumes of gases, which was discovered in 1808 and published in 1809.
It can also refer to the proportionality of a gas's volume to its absolute temperature at constant pressure.
The law is named after the French chemist who discovered the relationship between a gas's pressure and absolute temperature. Joseph gay lussac was his name.
The Gay-Lussac law, which states that if the temperature rises in the summer, the pressure must rise as well in order for K to remain constant, can help to clarify this.
Thus, the Gay-Lussac law can explain her observation.
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A cheetah can run at 30 m/s, but only for about 12s. How far will it run in that time
The cheetah will run a distance of 360 meters in 12 seconds if it maintains a constant speed of 30 m/s.
To determine how far a cheetah will run in 12 seconds at a speed of 30 m/s, we use the formula for distance traveled at a constant speed, which is [tex]distance = speed \times time[/tex]. Here, the speed is 30 m/s, and the time is 12 seconds, so the distance the cheetah runs is:
[tex]Distance = 30\ m/s \times 12\ s = 360\ meters.[/tex]
Therefore, the cheetah will run a distance of 360 meters in 12 seconds if it maintains a constant speed of 30 m/s throughout that time.
A runner went from 6 m/s to 2 m/s in 2 seconds, what was the acceleration?
The runner's acceleration is -2 m/s², indicating deceleration at a rate of 2 meters per second squared over a period of 2 seconds.
The acceleration of a runner who goes from 6 m/s to 2 m/s in 2 seconds can be calculated using the formula for acceleration which is Δv/Δt, where Δv is the change in velocity and Δt is the change in time. In this case, Δv = final velocity - initial velocity = 2 m/s - 6 m/s = -4 m/s (the negative sign indicates deceleration). The time interval Δt is 2 seconds. Thus, acceleration a is calculated as:
a = Δv/Δt = (-4 m/s)/2 s = -2 m/s².
This indicates that the runner is decelerating at a rate of 2 meters per second squared.
Un fir, de sectiune S = 5 mm patrati si lungime L0= 32 cm, este intins de o forta. Stiind ca E = 3 * 10 la put 7 N/m patrat, sa se calculeze constanta elastica k a firului.
The elastic constant of the wire is about 470 N/m
[tex]\texttt{ }[/tex]
Further explanationLet's recall Elastic Constant formula as follows:
[tex]\boxed{k = \frac{E A}{L}}[/tex]
where:
k = elastic constant ( N/m )
E = Young's Modulus ( Pa )
A = cross-sectional area ( m² )
L = initial length ( m )
Let us now tackle the problem!
[tex]\texttt{ }[/tex]
Translation:
A wire, with cross sectional area A = 5 mm² and length L = 32 cm, is stretched by a force. Assuming that Young's modulus of wire E = 3 × 10⁷ N/m², calculate the elastic constant k of the wire !
Given:
cross sectional area = A = 5 mm² = 5 × 10⁻⁶ m²
length of wire = L = 32 cm = 0.32 m
Young's modulus of wire = E = 3 × 10⁷ N/m²
Asked:
elastic constant of wire = k = ?
Solution:
[tex]k = \frac{E A}{L}[/tex]
[tex]k = \frac{ (3 \times 10^7) \times (5 \times 10^{-6})}{0.32}[/tex]
[tex]k = 468.75 \texttt{ N/m}[/tex]
[tex]k \approx 470 \texttt{ N/m}[/tex]
[tex]\texttt{ }[/tex]
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Answer detailsGrade: High School
Subject: Physics
Chapter: Elasticity
an engine has an input temperature of 653 K and an exhaust temperature of 312 K. determine the efficiency of the engine
Answer:
52.2%
Explanation:
Efficiency= output temperature/ input temperature
output temperature= input temperature-exhaust temperature
so, 653 K - 312 K = 341 K
341 K / 653 K = 52.2%
I got the answer correct on the online quiz.
What term best describes the geologic event taking place in the above illustration?
A.
plate convergence
B.
erosion
C.
weathering
D.
seafloor spreading
Answer:
sea floor spreading
Explanation:
I got it right on studyisland
The term that best describes the geologic event taking place in the above illustration is seafloor spreading. The correct option is D.
What is seafloor spreading?The magma forces itself upward more dramatically when the seafloor spreads slowly. As a result, mountain ranges and cliffs become taller and more dramatic. The process by which crustal plates—large cubes of Lithospheric plates from one another is known as seafloor spreading.
As the tectonic plates move away from one another, they pull the seafloor with them, causing fractures and cracks to form. During this time, hot magma would bubble up and quickly fill in the cracks, causing the seafloor to move. This is demonstrable because magnetism on the ocean floor indicates that it formed in this manner.
Therefore, the correct option is D. seafloor spreading.
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The question is incomplete. Your most probably complete question is given below: The image is added.
How are mass and weight different? how does gravity affect mass and weight
Select the statement that best describes gravity.
Answer
Gravity is the force that draws objects closer to the Earth because of the positive or negative charge.
Gravity is the force of attraction between two objects; it is dependent upon the mass of the objects and the distance between the objects.
Gravity is the force that repels two objects of similar charges; it is dependent on the number of charged particles in the objects.
Gravity is the force of attraction between objects of similar weight; it is not a strong force when objects are close to each other. ...?
Answer:
Gravity is the force of attraction between two objects; it is dependent upon the mass of the objects and the distance between the objects.
Explanation:
Gravity is defined as the force of attraction between two objects. It depends on the masses of objects and the distance between them. The gravitational force between two bodies is given by the universal law of gravitation. According to this law, the force of gravity is :
[tex]F=G\dfrac{m_1m_2}{d^2}[/tex]
Where
G is the universal gravitational constant
m₁ and m₂ are masses of two bodies
d is the distance between two bodies
Hence, the correct statement that describes gravity is (b)
Answer:
The answer is Gravity is the force of attraction between two objects; it is dependent upon the mass of the objects and the distance between the objects.
Explanation:
Gravity is a natural phenomenon by which objects with mass are attracted to each other, mostly observable in the interaction between planets, galaxies and other objects in the universe. It is one of the four fundamental interactions that causes the acceleration experienced by a physical body in the vicinity of an astronomical object. It is also called gravitational interaction or gravitation.
A 2.0-kilogram body is initially traveling at a velocity of 40. meters per second east.
If a constant force of 10. newtons due east is applied to the body for 5.0 seconds, the final speed of the body is ...?
The find the final speed of the 2.0-kilogram body is 65 m/s towards east.
To find the final speed of a 2.0-kilogram body initially traveling at 40 meters per second east, we will use the following physics concepts:
Newton's Second Law of Motion: F = ma, where F is the force, m is the mass, and a is the acceleration.
Kinematic Equation: vf = vi + at, where vf is the final velocity, vi is the initial velocity, a is the acceleration, and t is the time.
Step 1: Calculate the acceleration.
Using F = ma, we can solve for a:
F = 10 N
m = 2.0 kg
So, a = F/m = 10 N / 2.0 kg = 5 m/s²
Step 2: Calculate the final velocity using the kinematic equation.
Initial velocity, v_i = 40 m/s
Acceleration, a = 5 m/s²
Time, t = 5 s
So, vf = vi + at
[tex]v_f = 40 \, \text{m/s} + (5 \, \text{m/s}^2 \times 5 \, \text{s}) = 40 \, \text{m/s} + 25 \, \text{m/s} = 65 \, \text{m/s}[/tex]
Therefore, the final speed of the body is 65 meters per second east.
A 4kg book sits on a table and your pet hamster puts his front paws on the book and pushes down with a force of 3N. What is the normal force?
The normal force exerted by the table on a 4kg book, when a hamster pushes down on the book with an additional force of 3N, is 42.2N.
Explanation:When a 4kg book sits on a table, it is subject to Earth's gravity which pulls it down. This force, due to gravity, is given by the mass of the book multiplied by the acceleration due to gravity (Fg = mass × gravity), which is 4 kg × 9.8 m/s² = 39.2 N.
This downward force is balanced by an upward normal force (N) exerted by the table.
When a hamster pushes down on the book with an additional force of 3 N, the total downward force becomes Fg + 3 N.
Since the book is stationary on the table, the combined downwards forces must be balanced by the normal force exerted by the table.
Therefore, the normal force is equal to the weight of the book plus the force exerted by the hamster. So, N = 39.2 N + 3 N = 42.2 N. This is the normal force exerted by the table on the book.
The normal force exerted by the table on a 4kg book, which a hamster is pushing down on with a force of 3N, is 42.2 N, as it must balance the combined weight of the book and the force applied by the hamster.
Calculating the Normal Force
When considering the scenario of a 4kg book resting on a table with a hamster pushing down on it, we must take into account the forces acting on the book. The weight of the book due to gravity is given by W = mg, where m is the mass of the book and g is the acceleration due to gravity (9.80 m/[tex]s^2[/tex]).
Therefore, the weight of the book is W = 4 kg imes 9.80 m/[tex]s^2[/tex] = 39.2 N. The hamster exerts a downward force of 3 N, which adds to the weight of the book. The total downward force on the book is thus 39.2 N + 3 N = 42.2 N.
According to Newton's third law, the normal force exerted by the table on the book must balance this total downward force in the absence of vertical acceleration. Therefore, the normal force that the table exerts on the book is also 42.2 N.
(a) Calculate the total force of the atmosphere acting on the top of a table that measures 1.5 m 2.2 m.
N
(b) What is the total force acting upward on the underside of the table?
N
To calculate the total atmospheric force on the top of a table, the table's surface area is multiplied by the atmospheric pressure (F = PxA). The total force upward on the underside of the table under normal circumstances is equal to the downward atmospheric force.
Explanation:The subject of this question is physics focusing specifically on the concept of air pressure and force. To determine the total force of the atmosphere acting on the table, we first need to know that the atmospheric pressure is about 101325 N/m2. The force F is calculated by multiplying the pressure P with the area A (F = P x A). Hence, the area of the table is 1.5 m x 2.2 m = 3.3 m2. Therefore, the total force is F = 101325 N/m2 x 3.3 m2 = 334472.5 N, which is the answer to part (a).
For part (b) of the question, under normal circumstances, the total force acting upward on the underside of the table is the same as the downward atmospheric force, that is, 334472.5 N. This equal upward force is what keeps objects from being crushed by the atmospheric pressure.
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