Answer:
the answer is A) N2 + 3H2 → 2NH3
Explanation:
multiple reactants combine to form one product
option b is a single replacement
option c is a decomposition
options c is a double replacement
so the answer has to be A out of elimination anyway
Answer:The answer is B
Explanation:
Cars A and B have the same mass, but Car A's speed is 15 mph, whereas Car B is moving at 60 mph. The kinetic energy
of Car B is:
times that of Car A
times that of Car A
2 times that of Car A
4 times that of Car A
16 times that of Car A
Answer:
16 times that of car A
Explanation:
Moving objects have kinetic energy which is calculated using the formula:
E=(1/2)mv² where m is the mass of the object and v is its velocity.
For car A, kinetic energy =1/2×m×15²
=112.5m........................................i
For car B, the kinetic energy =1/2×m×60²
=1800m......................................ii
dividing ii by i we get
1800m/112.5m= 16.07
Therefore The kinetic energy of car B is 16.07 times that of car A
It requires 2.500 joules to raise a certain amount of water
(C = 4.186 Jlg°C) from 20.0°C to 60.0°C.
OOOO
What is the mass of the water that is being heated?
O 159
O 409
O 639
O 809
O 809.
The heat absorbed from the heating of water can be calculated by the product of the mass of the sample, specific heat, and the difference in temperature. From the given data, we can simply calculate the mass of the sample as follows:
H = mC(T2-T1)
2500 = m(4.186)(60-20)
m = 14.93 g.
What is an example of energy conversion?
Energy can be converted from one form to another. Examples: Gasoline (chemical) is put into our cars, and with the help of electrical energy from a battery, provides mechanical (kinetic) energy. Purchased electricity is fed into our TVs and is converted to light and sound.
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The mass of water that is heated under these conditions is calculated to be around 0.149 g using the formula m=Q/(c*ΔT). Therefore, the answer isn't among the given choices.
Explanation:The question is regarding the calculation of mass using energy, specific heat capacity, and change in temperature. This is a direct application of the formula Q=mcΔT, where Q is heat energy, m is mass, c is specific heat capacity, and ΔT is change in temperature. Given that Q = 2.500 joules, c = 4.186 J/g°C, and ΔT = 60.0°C - 20.0°C = 40.0°C, we can rearrange the formula and solve for 'm': m=Q/(c*ΔT). Substituting the given values, we obtain m = 2.500 joules / (4.186 J/g°C * 40.0°C) = 0.149 g; the answer isn't among the provided choices, and a recheck of your problem statement or calculations may be needed.
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Which device uses AC current to operate?
Answer:
the items you connect to a household outlet.
Explanation:
There exists many devices that uses AC current to operate. For example:
1. Electric Clocks. Synchronous clocks rely on the 50 or 60 Hz utility frequency of the AC electric power grid as a timing source. There are cases in which Power Plants decreases its frequency (Most of the times because of a failure), and for that reason you will find that electric clocks are delayed.
2. Fridge. Yes, your fridge needs AC current to work, that's why it's connected to your outlet!
3. Microwave. Yes, also your microwave needs AC current to work.
Basically, all of the items you connect to an outlet works with AC current.
what are igneous intrusions and extrusions
Igneous intrusions form when magma cools and solidifies before it can reach the surface. An extrusion consists of extrusive rock; which forms above the surface of the crust.
6. In California, changing lanes in the middle of an intersection:
AO is legal only in an emergency
B.O Is only legal when lane lines extend into the intersection
Is illegal
D. Is legal
In California, changing lanes in the middle of an intersection D. is legal.
Although it is legal, it's not necessarily the safest thing to do in an intersection.
In California, changing lanes in the middle of an intersection C. Is illegal
Explanation:Changing lanes in driving refers to the act of moving your vehicle from one lane to another on a multi-lane road or highway. Drivers typically signal their intent to change lanes, check blind spots, and ensure it's safe to do so before making the maneuver to prevent accidents and maintain smooth traffic flow.
Changing lanes in the middle of an intersection in California is illegal. The proper and safe way to change lanes is before entering the intersection and when it is safe to do so. Changing lanes within the intersection can disrupt the flow of traffic and potentially cause accidents.
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What is the numerical value, in meters per second squared, of the acceleration of an object experiencing true free fall?
Answer:
9.8 m/s/s
Explanation:
The numerical value, in meters per second squared, of the acceleration of an object experiencing true free fall is 9.8 m/s/s. This is called the acceleration due to gravity.
Answer: 9.8
The velocity of a free-falling object can be discovered by using a simple mathematical formula: v = (9.8 m/s2) * time
Explanation:
Which factors affect the electrical force between two objects?
mass and distance between them
charge and distance between them
mass and electric field strength
charge and mass
Answer: Charge and distance between them
Explanation: edge 21
Charge and distance between them affect the electrical force between two objects.
What is an electrical force?An electrical force is a force that acts between objects that have an electric charge. This force is a result of the interaction between the charges of the objects, and it can either be attractive or repulsive depending on the charges of the objects.
The electrical force between two objects is determined by their charges and the distance between them. The strength of the electrical force is proportional to the magnitude of the charges and inversely proportional to the square of the distance between the objects. This relationship is described by Coulomb's law, which states that the force between two point charges is proportional to the product of the charges and inversely proportional to the square of the distance between the charges.
The masses of the objects do not directly affect the electrical force between them. However, the masses of the objects can affect the direction of the electrical force if they are moving, as the force will cause a change in the motion of the objects. The electric field strength is a measure of the strength of the electric force per unit charge and is proportional to the charge density of an object. The electric field strength is not directly related to the mass of an object, but it can be affected by the presence of other charges in the vicinity.
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1. What is the system of knowledge and the methods used to find that knowledge?
a. science
b. technology
c. measurement
d. curiosity
2. How are science and technology related?
a. technology is a branch of science
b. science is a branch of technology
c. advances in a science may lead to advances in technology and vice versa
3. Why are scientific models important?
a. they prove scientific theories
b. they help visualize things that are very complex, very large, or very small
c. they never change
4. The variable that is purposely changed and that you wish to test is called?
a. independent
b. dependent
c. controlled
5. An explanation that tries to make sense of your observations based on personal experience and prior knowledge is called?
6. Name two possible ways that scientists use to communicate the results of an investigation?
7. How do scientist who speak different languages make their data understandable to one another?
a. they all use different systems of measurement
b. they all use SI system
c. they communicate through a universal translator
8. What is the definition of the term peer review?
9. Why are peer reviews important? Give one reason
10. Which of following is NOT a branch of natural science?
a. life science
b. earth science
c. physical science
d. social science
11. Name one of the main ideas of physical science?
12. List any 3 main steps of the scientific methods
13. What happens when the data in an investigation does not support the original hypothesis?
a. the scientist gives up and starts an investigation on a new topic
b. the data must be incorrect and is then thrown out
c. the hypothesis is revised
d. the data is altered so that they support the original hypothesis
14. What is a statement that summarizes a pattern found in nature?
a. a scientific law
b. a fact
c. a scientific theory
d. a hypothesis
15. What is the SI units of Thermodynamic temperature?
Answer:
1. science
2. advances in a science may lead to advances in technology and vice versa
3. they help visualize things that are very complex, very large, or very small
4. independent
5. inference
6. by publishing articles in scientific journals
by giving talks at scientific conferences
7. they all use SI system
8. a process in which scientists examine other scientists work
9. scientist receive questions and criticism from their peers
10. social science
11. forces cause changes in motion
12. drawing conclusions
analyzing data
revising a hypothesis
13. the hypothesis is revised
14. a scientific law
15. Kelvin
Explanation:
1.
The system of knowledge and the methods used to find that knowledge is referred to as science
2.
Science and Technology are related in that advances in a science may lead to advances in technology and vice versa
3.
Scientific models are important because they help visualize things that are very complex, very large, or very small
4.
The variable that is purposely changed and that you wish to test is called the independent variable.
5. An explanation that tries to make sense of your observations based on personal experience and prior knowledge is called inference
6. There are a number of possible ways that scientists can use to communicate the results of an investigation;
by publishing articles in scientific journals
by giving talks at scientific conferences
7. Scientists who speak different languages make their data understandable to one another through the use of the SI system .
8. The term peer review refers to a process in which scientists examine other scientists work for the purpose of questioning or criticism.
9. One reason that makes peer reviews important is;
Scientist are able to receive questions and criticism from their peers on a particular work of research.
10. The branches of natural science include;
life science
earth science
physical science
11. One of the main ideas of physical science is that forces cause changes in motion
12. The main steps of the scientific methods include;
drawing conclusions
analyzing data
revising a hypothesis
13. What happens when the data in an investigation does not support the original hypothesis;
the hypothesis is revised
14. What is a statement that summarizes a pattern found in nature?
a scientific law
15. What is the SI units of Thermodynamic temperature?
Kelvin
a force of 1 Newton is equivalent to 1
A force of 1 Newton is equivalent to 1 kg (m/s²). The product of mass and acceleration is known as force.
What is force?Force is defined as the push or pull applied to the body. Sometimes it is used to change the shape, size, and direction of the body.
Force is defined as the product of mass and acceleration. Its unit is Newton.
F=ma
The Si unit of the force is Newton. While the MKS unit is found as;
F=ma
F = kg (m/s²)
Hence, a force of 1 Newton is equivalent to 1 kg (m/s²).
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how does the electric potential energy between two charged particles change if one particle is reduced by a factor of 3?
a. increased by a factor of 3
b. it is decreased by a factor of 9
c. it is reduced by a factor of 3
d. it is increased by a factor of 9
The electric potential energy is directly proportional to product of charges, hence when the particle charge is reduced by a factor of 3, the electric potential energy will also be reduced by a factor of 3.
Answer: Option C
Explanation:
Electric potential energy is the potential energy which is conservative to the respective coulomb forces between the two particle charges which are at a specified separation from each other.
Electric potential energy = [tex]\frac{k (q1 q2)}{r}[/tex]
Where the k is the electrostatic constant,
q1 is the first charge.
q2 is the second charge.
r is the distance between q1 and q2.
Which term best describes the important pieces of information that scientists gather and record during an experiment?
O conclusions
Odata
O research
supplies
Answer:
It will for sure be data, that is the name for information gathered from any experiment
Answer:
data
Explanation:
Data is the set of observations that a scientist gathers during an experiment. When the data is analyzed and used to prove a hypothesis it becomes information.
The conclusion is the inference drawn from the data after analysis.
Data is used to describe observations in both qualitative or quantitative research.
Research is the overall study of an experiment.
Which units can be used to measure length or distance? Check all that apply.
gram
meter
kilometer
liter
inch
Answer:
meter
kilometer
inch
Explanation:
The units can be used to measure length or distance are meter, kilometer and inch.
What is length?Length is the distance measured from one point to the the other.
Length is the fundamental unit of the physical system. It can be expressed in different units systems like SI, FPS or CGS
Thus, the units used to measure distance are meter, kilometer and inch.
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What is formed from nuclear decay?
Answer:
Energy and another nucleus of the new element/particle.
Explanation:
A nuclear decay is an radioactive decay where the nucleus of an atom becomes unstable and loses energy through emitting radiations.For example, there is an alpha decay that release an alpha particle called helium-4, a beta decay that involve releasing a beta particle which normally occurs in a nucleus that has more neutrons than protons.Other decays are the gamma decay,electron capture and the spontaneous fission.Nuclear decay produces a lot of energy and radiations that could harm human cells if exposed.
Nuclear decay results in the formation of new elements or isotopes, which can involve beta decay, gamma decay, and alpha decay processes; notably, in reactors, this can lead to the production of plutonium-239 from uranium, and in supernovae, it results in the emission of gamma rays as elements like nickel decay into stable isotopes.
Nuclear decay forms new elements or isotopes by the transformation of one nuclide into another. This process can occur in various forms, such as beta decay, gamma decay, and alpha decay. For instance, in nuclear reactors, plutonium-239 is formed as a byproduct during the decay of uranium through a successive process where uranium-238 captures a neutron to become uranium-239, which then undergoes beta decay to become neptunium-239 and subsequently undergoes another beta decay to form plutonium-239.
Beta decay involves the conversion of neutrons to protons or vice versa within the nucleus, along with the emission of electrons or positrons and neutrinos or antineutrinos, driving the nuclide towards a stable configuration. Gamma decay involves the emission of high-energy photons, usually after another decay process has left the nucleus in an excited state.
A notable natural occurrence of nuclear decay happens in supernovae, where elements like nickel-56 decay into cobalt-56 and eventually to the stable isotope iron-56, emitting gamma rays that contribute energy to the expanding supernova remnant.
Hello
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Please reply to my question
Difference between land breeze and sea breeze in easy words
Remember, I will mark you as a brainliest
Answer:
The wind will blow from the higher pressure over the water to lower pressure over the land causing the sea breeze. The sea breeze strength will vary depending on the temperature difference between the land and the ocean. At night, the roles reverse. The air over the ocean is now warmer than the air over the land.
Sea breezes occur during hot, summer days because of the unequal heating rates of land and water. During the day, the land surface heats up faster than the water surface. Therefore, the air above the land is warmer than the air above the ocean. Now, recall that warmer air is lighter than cooler air.
A series circuit has a battery and resistor and a light bulb with a power of 3.0 W if the current in the circuit is 0.90 A over a period of 20 seconds what is the voltage across a lightbulb
Power = (current)² x (resistance)
Resistance = (power) / (current)²
Resistance = (3 W) / (0.9 A)²
Resistance = 3.333... ohms
That's the total resistance in the series circuit. (3 and 1/3) ohms .
Voltage = (current) x (resistance)
Voltage = (0.9 A) x (3.333... ohms)
Voltage = 30 volts
That's the total voltage ... the battery that's powering the whole series circuit.
Using only the information given in the question, there's no way to calculate how much of the 30V appears across the resistor and how much of it appears across the light bulb.
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Briefly describe what you think the world would be like if the amount of greenhouse gases in the atmosphere were reduced to levels like those during the ice age.
Answer:
If they were reduced to the levels like those during the ice ages, I think the Earth might go back to being frozen again.
Right now, what make the glaciers and polar ice caps melt?
Global Warming and greenhouse gases are depleting the Ozone. The Ozone is what traps the heat from the Sun and radiates it back to the Sun. Greenhouse gas is depleting the Ozone, which means that the heat from the sun is less protected, which results in climate change. It makes the Earth hotter which can mean that the glaciers are melting because the climate in the North and South pole is way to hot for it to stay frozen.
Hope this helped!
Answer: Earth would become frozen and also greenhouse gases reduce the ozone layer which is why glaciers are melting and Earth is getting hotter. It is why greenhouse gases are a big issue.
Which is not a source of noise pollution?
A)airplanes
B)acid rain
C)machines
D)cars
Answer:
acid rain.
Explanation:
its kinda obvious.
An alarm clock has a current of 4.5 amps and a resistance of 3.2 ohms. What is the voltage in the circuit?
A.1.4 volts
B.0.71 volts
C.14 volts
D.46 volts
Answer: C. 14 volts
Explanation:
According to Ohm's law, the voltage [tex]V[/tex] is:
[tex]V=R.I[/tex] (1)
Where:
[tex]R=3.2\Omega[/tex] is the resistance of the clock
[tex]I=4.5A[/tex] is the electric current that flows throgh the clock
Substituting these values in (1):
[tex]V=(3.2\Omega)(4.5A)[/tex] (2)
[tex]V=14.4V\approx14V[/tex]
Answer:
See image
Explanation:
Plato
A beach ball with a volume of 5,000 cm3 is pushed underwater. What is the magnitude of the buoyant force pushing upwards? The density of water is 1 gram/cm3. 49N 25N 40N 39N
The answer is:
The buoyant force is equal to 49N.
Why?The buoyant force is the force that pushes upwards and object when it's submerged in water, this force is always trying to move the object to the surface of the liquid or water. We must consider that the volume of water or liquid displaced is equal to the volume of the submerged object.
We can calculate the buoyant force using the following formula:
[tex]F_{B}=Density*VolumeDisplaced*GravityAcceleration[/tex]
Where,
Density is the density of the water or liquid.
Volume displaced is equal to the volume of the submerged object.
Gravity acceleration is the acceleration due to gravity.
So, from the statement we know that:
[tex]VolumeDisplaced=BeachBallVolume=5000cm^{3}\\\\Density=1\frac{gram}{cm^{3} }=\frac{0.001kg}{cm^{3} }\\\\g=9.8\frac{m}{s^{2} }[/tex]
Now, substituting and calculating we have:
[tex]F_{B}=Density*VolumeDisplaced*GravityAcceleration[/tex]
[tex]F_{B}=0.001\frac{kg}{cm^{3}*} *5000cm^{3}*9.8\frac{m}{s^{2} }[/tex]
[tex]F_{B}=0.001\frac{kg}{cm^{3}*} *5000cm^{3}*9.8\frac{m}{s^{2} }[/tex]
[tex]F_{B}=49\frac{Kg.m}{s^{2}}=49N[/tex]
Hence, we have that the correct answer is:
The buoyant force is equal to 49N.
Have a nice day!
In which situation is no work being done?
A. a person carrying a box from one place to another
B. a person picking up a box from the ground
C. a person pushing a box from one place to another
D. a person pulling a box from one place to another
In physics, 'work' is a force causing the motion of an object. For work to be done, there must be displacement in the direction of the applied force. In the scenario presented, the situation in which no work is done is when a person is carrying a box from one place to another, as the force and displacement are perpendicular to each other.
Explanation:The concept of 'work' in physics is different from the everyday usage of the term. In physics, work is defined as a force causing the motion—or displacement—of an object. In the concept of work, two key components need to be present: force and displacement in the direction of the force.
With this definition, the scenario where no work is being done is: A. a person carrying a box from one place to another. In this situation, regardless of the weight of the box, if the person carries it horizontally, the force exerted (which is vertically upwards, opposing the weight of the box) and the displacement of the box (which is horizontal) are perpendicular to each other. Since work done is the product of force, displacement, and the cosine of the angle between them, when force and displacement are at 90 degrees, the cosine of the angle is zero and the work done is zero.
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The horizontal on the periodic table of elements are called periods
Answer:
The answer is true. The horizontal line on the Periodic Table is called periods.
Answer:
Rows
Explanation:
The horizontal _rows_ on the periodic table of elements are called periods.
NaCI is__
an acid
a base
a salt
Answer:
Explanation:
An acid has H as its metal as in H2SO4
A base has OH as its nonmetal as in Mg(OH)2
A salt is made of neither. That's what NaCl is -- a salt.
A hot-air balloonist, rising vertically with a constant speed of 5.00 m/s releases a sandbag at the instant the balloon is 40.0 m above the ground. After it is released, the sandbag encounters no appreciable air drag. Compute the velocity of the sandbag at 0.250 s after its release.
Answer:
[tex]v = 2.55\ m / s[/tex] ↑ upwards
Explanation:
Take the direction up (where the hot-air balloonist moves) as the positive direction, and take the direction down (contrary to the direction of the hot-air balloonist) as the negative direction.
Then we propose the kinematic equation for the speed of the sandbag:
[tex]v (t) = v_0 + at[/tex].
Where
[tex]v_0[/tex] is the initial velocity of the sandbag
a is the acceleration of the sandbag
t is the time in seconds.
In this case
a is the gravitational acceleration of [tex]9.8\ m / s ^ 2[/tex]
[tex]v_0 = 5\ m / s[/tex]
[tex]t = 0.250\ s[/tex]
Now we substitute these values into the formula and solve for [tex]v(t)[/tex]
[tex]v = 5 + (-9.8) (0.250)\\\\v = 5 -9.8 (0.250)\\\\[/tex]
[tex]v = 2.55\ m / s[/tex] ↑ upwards
what is the best hypothesis to use for this investigation
Answer:
NOT:
If copper is a better conductor, it will heat up faster than iron.
Explanation:
Elements in Group VIIIA (also known as Group 18, or the noble gases) have
similar properties because they all have
A. the same number of electron shells
B. full octets
C. the same number of valence electrons
D. the same number of electrons needed to fill their octet
Elements in Group VIIIA (noble gases) have similar properties because they all have full octets in their outer energy shells, making them extremely unreactive due to having complete valence electron configurations.
Elements in Group VIIIA, also known as Group 18 or the noble gases, have similar properties because they all have full octets, which means their outer energy shells are complete. This results in them being very unreactive. The similarity in chemical properties among elements of the same group occurs because they have the same number of valence electrons, which determines how they react.
An 12 N force is applied to a 1 kg object. What is the magnitude of the objects acceleration?
Answer:
a=12 m/s²
Explanation:
Newton's second law of motion states that the acceleration of a body is directly proportional to the force applied and takes place in the direction of force.
This can be summarized as: F=ma, where m is the mass of the object on which force F acts. a is the acceleration due to the force applied.
12N= 1kg×a
a=12N/1kg
a=12m/s²
Describe uniform velocity and variable velocity in short
Answer:
If the an object is moving in such a way that the magnitude of its velocity is same but its direction is changing then the object is said to be moving with variable velocity. Uniform velocity is when an object has an equal distance and an equal interval of time in a specific direction it is said to have uniform velocity.
In which situation will the lowest resistance occur?
Answer:
thick wire and cold temperatures
Answer: There may be two types of resistances here:
Air resistance: for example when something is falling down, the air will push the object upwards. As a bigger surface has the object, more air is pushing, so if you want to reduce the resistance yo must reduce the surface area. For example, a sheet of paper will experience more resistance if it is open if you make a small ball with it.
Electric resistance: This is the resistance of conductors against the electrons that try to travel along with it.
there are two equations here.
R = p*L/A, this talks about the volume and density of the conductor, where p is the density, L is the length and A is the area perpendicular to the direction in which the electricity flows.
Then if you reduce the length, and increase the area, the resistance will be reduced.
the other equation is: R(T) = R0( 1 + a*(T - 20°))
Where R0 is the resistance at 20° and a is a coefficient for T = 20°.
Here, you can see that at smaller temperatures, the resistance decreases, so we can conclude that we must increase the area, and decrease the length and temperature.
Is a cremated flower pot a good conductor? please help.
Answer:
It depends on the size and density but No.
Explanation:
How would a small bar magnet be oriented when placed at position x?
A small bar magnet placed at any position will align itself according to nearby magnetic fields. In the magnetic field of a larger magnet, its North pole will point towards the South pole of the larger magnet and vice versa. In the Earth's magnetic field, the magnet's North pole will point towards the Earth's geographical North.
Explanation:To determine how a small bar magnet would be oriented when placed at position x, we must consider the nature of magnetic fields. Every magnet has two poles: a north-seeking pole (N) and a south-seeking pole (S). The orientation of the magnet is dictated by these poles in response to magnetic fields nearby.
Let's say we have a larger stationary magnet with clearly defined North and South poles. If we place the small bar magnet at position x, it will align itself such that its North pole points towards the South pole of the stationary magnet and its South pole points towards the North pole of the stationary magnet. This is because unlike poles attract each other while like poles repel each other.
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A small bar magnet placed at position x will align head-to-tail with Earth's magnetic field, and if near another magnet, it will interact in a way where like poles repel. The bar magnet's orientation will depend on both the Earth's magnetic field and other nearby magnetic fields or magnets.
When a small bar magnet is placed at position x, it will align itself head-to-tail with the natural magnetic field lines of the Earth. This alignment can be affected by the ambient field of the Earth and nearby magnetic materials, but typically, a magnet will settle into an orientation where its north-seeking pole points toward the Earth's magnetic north and the south-seeking pole points toward the Earth's magnetic south.
In the case of two bar magnets, like poles repel and opposite poles attract. If a bar magnet is suspended with the north pole pointing up, it will not only orient along the Earth's magnetic field lines but also interact with any nearby magnets. When placed in proximity to a second magnet with its north pole facing the first magnet's north pole, the second magnet will experience a repulsive force in the +x direction, as implied by the given scenario where one magnet's dipole moment is pointing in the +x direction, and the other's is pointing back towards the origin.
The general behavior of the small bar magnet at position x will follow these principles, and its exact orientation will depend on the specific environmental magnetic influences and interactions with other magnets in the vicinity.