Answer:
Liquid to gas
Explanation:
When molecules are in the liquid state, they are held together by internal forces of the molecules while moving in a constant motion.Increasing the temperature through heating, will make the molecules move faster and collide at a higher rate because they gain kinetic energy after obtaining the heat.This will loosen the forces holding the molecules together leading to vaporazation.
What are the coefficients of the equation below when is balanced?
A) 3, 2, 1,6
3CaCl2 + 2Na3PO4 --> 1Ca3(PO4)2 + 6NaCl
what may happen if oceanic plates stop moving
Answer:
the earth would be a different place, for example there wouldnt be anymore volcanic eruptions
Explanation:
when the earth plates stops moving is the source to everything, the ground would shake, waves would stop ect
There would be no new island formations when oceanic plates stop moving.
Explanation:
The oceanic plate or the tectonic plate movement determines the several activity of land and ocean which keep making the life possible. As the plate movement stop, volcanic eruption will be stopped, sea floor will not spread further, every activity below ground will cease.
The pressure increases inside the core and so does the erosion. The continent will be lost with all its life on the land. Oceanic life will survive more but may freeze the planet to die.
suppose a scientist found a new matal-like substance in the desert. He determined its mass to be 20 grams. The volume was determined by water displacement to be 5 cm^3. What is the density of the substance? Will it sink or float in liquid water ( 1g/cm^3)?
Density = (mass) / (volume)
Density = (20 g) / (5 cm³)
Density = 4 g/cm³ .
The density of the substance is greater than the density of water. A lump of the substance will sink in water, unless the lump is formed into a shape that displaces 20 cm³ of water or more, such as a tiny boat shape.
Molecules can be made of atoms Of
the same element only
different elements only
the same or different elements
Answer:
Molecules can be made of the atoms of same element as well as of the different elements.
Explanation:
H2 is called a molecule because it is made up of atoms of same elements H.
Also, H2O is called a molecule as it is made up of atoms of different elements H and O.
Answer:
The same or different elements
Explanation:
I did this question, thats correct.
A force of 5 N accelerates an object. The object’s mass is 50 g. What is the acceleration of the object? (Formula: F=ma)
0.01 m/s2
0.1 m/s2
10 m/s2
100 m/s2
Answer:
100 m/s²
Explanation:
First, convert to SI units:
50 g = 0.050 kg
Now plug into the formula:
F = ma
5 N = (0.050 kg) a
a = 100 m/s²
A force of 5 N accelerates an object. The object’s mass is 50 g. Then acceleration of the object is 100 m/s².
The formula linking force, mass, and acceleration is given by
F = ma,
Where F = the force applied to the object,
m = the mass of the object,
and a =the resulting acceleration.
In this case, the force is 5 N and the mass is 50 g, or 0.05 kg (remember to convert grams to kilograms).
Now, we can solve for the acceleration using:
a = F/m
a = 5 N / 0.05 kg
a = 100 m/s²
So the acceleration of the object is 100 m/s².
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the impulse given to a ball with a mass of 2.0 kg is 16 N.s. If the ball were already moving at 3.0 m/s, what would the final velocity be?
Answer:
11 m/s
Explanation:
Impulse equals change in momentum.
I = Δ(mv)
Since mass isn't changing:
I = m Δv
16 Ns = (2.0 kg) (v - 3.0 m/s)
v = 11 m/s
What is the most often given valie of zero to describe an object's position on a straight line? Displacement; reference point; distance; or ending location?
Answer:
Reference point
Explanation:
When describing the motion of an object, a reference point is used in order to measure distances/displacements starting from that point. Most often, the position marked as zero is used as reference point for simplicity.
Distance is a measure of the space covered by an object in motion; it is a scalar, and its value depends on the path taken by the object.
On the contrary, displacement is a vector quantity, whose magnitude is equal to the distance (calculated on a straight line) between the ending location and the starting location of the motion of the object. This means that the displacement does not depend on the path taken by the object, but only on the locations of the initial and final point.
Answer:
Reference Point
Explanation:
This is correct because this is where everything starts.
Raymond requires extensive knowledge of SQL and Bugzilla. What is Raymond’s job role?
A.
mobile app tester
B.
mobile app developer
C.
iOS architect
D.
senior iOS developer
B} Mobile app developer （╹◡╹）
None of the options provided specifically require the skills of SQL and Bugzilla, but based on these skills, Raymond is likely to work in a broader role related to database management, software development, or quality assurance such as a Database Administrator or a Quality Assurance Engineer.
Explanation:Based on the requirement of having extensive knowledge of SQL and Bugzilla, it's likely that Raymond could be working in a role related to database management or testing. However, none of the listed options, which include Mobile App Tester, Mobile App Developer, iOS Architect, and Senior iOS Developer, specifically require these skills.
Most likely, Raymond is working in a broader role in software development or quality assurance. SQL (Structured Query Language) is a programming language used for managing and manipulating databases, while Bugzilla is a web-based general-purpose bug tracking system and testing tool. Therefore, his role could be a Database Administrator or a Quality Assurance Engineer.
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7. How much thermal energy is absorbed when 10.0 g of ice at 0.0 degrees C changes phase to liquid water at 0.0 degrees C? The molar mass, M, of water is 18.02 g/mol and the theoretical heat of fusion, Hfus, of water is 6.01 kJ/mol
Answer:
3.34 kJ
Explanation:
FIrst of all, we need to calculate the number of moles corresponding to 10.0g of ice. This is given by
[tex]n=\frac{m }{M_m}[/tex]
where
[tex]M_m = 18.02 g/mol[/tex] is the molar mas
m = 10.0 g is the mass
Substituting
[tex]n=\frac{m}{M_m}=\frac{10 g}{18.02 g/mol}=0.555 mol[/tex]
Now we know that the heat of fusion is
[tex]H_{fus}=6.01 kJ/mol[/tex]
so the thermal energy needed to fuse the ice is
[tex]Q=n H_{fus} = (0.555 mol)(6.01 kJ/mol)=3.34 kJ[/tex]
A physics student hangs various masses from a spring and records the resulting distance the spring has stretched. The graph shows the data, which plots the mass hung from the spring as a function of the distance the mass caused the spring to stretch beyond its original length. By how much will the spring have stretched if you hang a 2.35 kg mass from it, assuming that it continues to obey Hooke’s law?
120 cm
94 cm
76 cm
50 cm
Answer: 94 cm
Explanation:
The answer is not among the given options, however it can be approximated to 94 cm.
Hooke's law establishes that the elongation of a spring is directly proportional to the modulus of the force [tex]F[/tex] applied to it, as long as the spring is not permanently deformed:
[tex]F=k (x-x_{o})[/tex] (1)
Where:
[tex]k[/tex] is the elastic constant of the spring
[tex]x_{o}[/tex] is the length of the spring without applying force.
[tex]x[/tex] is the length of the spring with the force applied.
According to this, we have a spring where only the force due gravity is applied. In other words, the force applied is the weigth [tex]W[/tex]:
[tex]W=m.g[/tex] (2)
So, equation (1) can be rewritten as:
[tex]W=k (\Delta x)[/tex] (3)
Isolating [tex]k[/tex]:
[tex]k=\frac{W}{\Delta x}[/tex] (4) From here we can deduce [tex]k[/tex] is the slope of the line of the graph shown, as follows:
[tex]k=\frac{m_{2}g-m_{1}g}{x-x_{o}}=g\frac{m_{2}-m_{1}}{x-x_{o}}[/tex]
Where:
[tex]m_{2}=400 g=0.4 kg[/tex]
[tex]m_{1}=200 g=0.2 kg[/tex]
[tex]g=9.8\frac{m}{s^{2}}[/tex] is the acceleration due gravity
[tex]x=15 cm=0.15 m[/tex]
[tex]x_{o}=7.5 cm=0.075 m[/tex]
[tex]k=9.8\frac{m}{s^{2}}\frac{0.4 kg-0.2 kg}{0.15 m-0.075 m}[/tex]
[tex]k=26.13 N/m[/tex] (5) This is the spring constant
Now, with the mass [tex]m=2.35 kg[/tex] we can calculate the weight:
[tex]W=m.g=(2.35 kg)(9.8\frac{m}{s^{2}})[/tex]
[tex]W=23.03 N[/tex] (6)
So, knowing [tex]k=26.13 N/m[/tex] and [tex]W=23.03 N[/tex] we can calculate [tex]\Delta x[/tex] from (3):
[tex]\Delta x=\frac{W}{k}[/tex] (7)
[tex]\Delta x=\frac{23.03 N}{26.13 N/m}[/tex] (8)
[tex]\Delta x=0.88 m=88.13 cm[/tex] (9)
The value that is nearest to 88.13 cm is 94 cm
The question is about determining how much a spring would stretch under a certain weight, based on Hooke's law. Without the spring constant or the graph data, it is impossible to provide the exact value. Nonetheless, it is crucial to acknowledge that the stretch (x) can be calculated from the formula of Hooke’s law (F=kx) substituting force (F) with mass times gravity (mg).
Explanation:This problem is based on Hooke’s law, which is a principle in physics that states that the force needed to extend or compress a spring by a certain distance scales linearly with respect to that distance. The law is usually formulated as F = kx, where F is the force applied, x is the displacement of the spring (how much it is stretched), and k is the spring constant.
In this case, you want to find x (the stretch of the spring) when a certain mass (m) is hung from the spring. According to Newton’s second law, F = ma, where a is the acceleration due to gravity. However, in this context, F can also be thought of as the weight of the mass, which is mg. So, F = mg. Therefore, mg = kx.
Unfortunately, without knowing the value of the spring constant (k), or having the actual data from the graph, it is not possible to calculate how much the spring would stretch when a 2.35 kg mass is hung from it.
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Where can we witness conduction, convection, and radiation in the Earth's spheres?
convection of heat in the asthenosphere, conduction of heat from the inner core, and radiation of the inner core throughout the other layers
A 6.0-ohm resistor that obeys Ohm’s Law is connected to a source of variable potential difference. When the applied voltage is decreased from 12 V to 6 V, the current passing through the resistor
a.
remains the same
b.
is doubled
c.
is halved
d.
is quadrupled
Is halved. A 6Ω resistor connected to a voltage source which voltage is decreased from 12V to 6V the current passing through the resistor is halved.
The key to solve this problem is applying Ohm's Law V = R I, clearing I from the equation, we obtain I = V/R. Then, the current is directly proportional to the voltage and inversely proportional to the resistance.
V = 12V and R = 6Ω
I = 12V/6Ω = 2A
V = 6V and R = 6Ω
V = 6V/6Ω = 1A
As we can see the current is halved if the voltage descreased from 12V to 6V
The correct option is
(c) is halved.
Given a 6Ω resistor and the voltage is decreased from 12V to 6V
Ohm's Law:
Ohm's law states that the current (I) is directly proportional to the voltage (V) and inversely proportional to the resistance (R). That is
V= I/R
here, according to the question
initially, V = 12V and R = 6Ω
so I = 12V/6Ω = 2A
Finally
V = 6V and R = 6Ω
I' = 6V/6Ω = 1A
so we see that
2I' = I
I' = I/2
Hence, the current is halved.
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Cattle ranchers and dairy farmers rarely allow all of their animals to reproduce. Instead, they practice selective breeding and only encourage the reproduction of animals with specific features.
Which of the following cows would a dairy farmer most likely choose to reproduce?
A.
a cow that makes a lot of milk
B.
a cow that can run quickly
C.
a cow with thick, soft fur
D.
a cow with large, strong hooves
Answer:
A
Explanation:
I believe the answer would be A because they are gonna want a cow who can produce a lot of milk because then they can sell what milk is left over to the people
They practice selective breeding and only encourage the reproduction of animals with specific features such as cow that makes a lot of milk.
What is the main aim of dairy farmers for breeding?The Cattle ranchers and dairy farmers do selective breeding so that they produce an offspring that have high milk production capabilities. Dairy farmers rear animals for milk production.
So we can conclude that they encourage the reproduction of animals with specific features such as cow that makes a lot of milk.
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Photoelectrons with a maximum speed of 7.00 · 105 m/s are ejected from a surface in the presence of light with a frequency of 8.00 · 1014Hz. If the mass of an electron is 9.1 · 10-31 kg, calculate the maximum kinetic energy of a single electron, in joules.
_____ J
6.3 x 10-25
4.4 x 10-19
3.2 x 10-25
2.2 x 10-19
Answer:
2.2 x 10-19
Explanation:
Kinetic Energy = 1/2 m v ^2
2. How much work does gravity do in causing a 6 kg hammer to fall to the ground from a
height of 10 m?
Answer:
Therefore, gravity does 588.6 Joules of work in causing the 6 kg hammer to fall 10 meters.
Explanation:
Gravity does work by exerting a force on the hammer over a certain distance. We can calculate this work using the formula:
Work = Force x Distance (where force is parallel to the direction of movement)
In this scenario:
Force = Gravitational force acting on the hammer (Weight of the hammer)
Distance = Height fallen
Force:
We can calculate the gravitational force (weight) using the formula: Weight = Mass x Gravity
Mass of the hammer (m) = 6 kg
Gravity (acceleration due to gravity) = 9.81 m/s² (approximately)
Weight = 6 kg * 9.81 m/s² = 58.86 N (Newtons)
Distance:
Distance (d) = 10 m
Work done by gravity:
Work = Force x Distance = 58.86 N * 10 m = 588.6 Joules
Therefore, gravity does 588.6 Joules of work in causing the 6 kg hammer to fall 10 meters.
an ocean wave is an example of what type of wave
Answer:
It is called a surface wave (rayleigh wave) that transmits its energy with the wind blowing onto its surface.Hope this helps
Give 3 examples of something with kinetic energy.
Explanation:
Radio wavesstatic electricity a car moving along the road3 examples of kinetic energy:
The river flow down the stream or the falling at the gorge has kinetic energy possessed in it. The basketball dribbled down which bounces back to the certain height has the kinetic energy in the ball. The shooting star falls down in the sky or space with the kinetic energy in it.Kinetic energy is the form of energy which is associated with motion of the body who possesses it. Kinetic energy is dependent upon “mass and velocity” of the body.
Hurricanes can be very destructive, bringing tornadoes, flooding, strong winds, and storm surges to the land areas they come in contact with. What is a storm surge? a wall of water that is pushed ashore a large, rotating, low-pressure storm a strong, narrow current that flows rapidly away from the beach a large ocean wave usually caused by an undersea earthquake
Answer:
DescriptionA storm surge, storm flood, tidal surge or storm tide is a coastal flood or tsunami-like phenomenon of rising water commonly associated with low pressure weather systems, the severity of which is affected by the shallowness and orientation of the water body relative to storm path, as well as the timing of tides.
A wall of water that is pushed ashore is a storm surge. So, the correct option is A.
What is Storm surge?A coastal flood or tsunami-like event of rising water known as a storm surge, storm flood, tidal surge, or storm tide is frequently linked to low-pressure weather systems like cyclones. It excludes waves and is calculated as the rise in the water level just above typical tidal level.
Extreme coastal as well as interior flooding may be the result of the seawater's pulse when it reaches the coast. Storm surge can sometimes be much more destructive than the thunderstorms that produce it.
An anomalous increase in water caused by a storm that is higher than the expected astronomical tides is known as a storm surge. Storm tide, which is referred to as the increase in water level brought on by a storm surge and an astronomical tide, shouldn't be confused with storm surge.
Therefore, the correct option is A.
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Your question is incomplete, mot probably the complete question is:
Hurricanes can be very destructive, bringing tornadoes, flooding, strong winds, and storm surges to the land areas they come in contact with. What is a storm surge?
a wall of water that is pushed ashorea large, rotating, low-pressure storma strong, narrow current that flows rapidly away from the beacha large ocean wave usually caused by an undersea earthquake
20. Consider two Stars A and B with temperatures Ta and TB and radii Ra and RB respectively. If TA
= 2 TB and Ra= 12 RB, which statement about the stars' luminosities, LA and LB, is true?
using this formula: L=(R^2)(T^4)
a) La =LB
b) La = 2 LB
La=4 LB
d) La = 12 LB
e) La = 14 LB
Answer:
[tex]L_A = 9 L_B[/tex]
Explanation:
The formula that relates the luminosity of a star (L) to its radius (R) and the temperature (T) is
[tex]L=\frac{R^2}{T^4}[/tex]
For star B, we can write:
[tex]L_B=\frac{R_B^2}{T_B^4}[/tex]
For star A, we have
[tex]T_A = 2 T_B\\R_A = 12 R_B[/tex]
So the luminosity of star A is
[tex]L_A=\frac{R_A^2}{T_A^4}=\frac{(12 R_B)^2}{(2 T_B)^4}=\frac{144 R_B^2}{16 T_B^4}=9\frac{R_B^2}{T_B^4}=9 L_B[/tex]
This is a machine that will convert mechanical nuclear or chemical energy into electrical energy
Answer:
generator
Explanation:
a machine that will convert mechanical, nuclear, or chemical energy into electrical energy.
The sun can continue to exist in its present stable state for about another
40%
5.5 billion years
O 10 billion years
60%
100 billion years
O 15.5 billion years
Our
60%
Answer:
5.5 billion years
Explanation:
The answer
Answer:
5 billion years
Explanation:
A star like the Sun is called a main sequence star. It is considered as young age star. Sun is a medium sized star and its mass determines how long it can continue in its present form.
Its heat and light are a result of the thermonuclear fusion reactions that occur in its core. The proton cycle and carbon cycle are responsible for generating the immense energy which is released in the form of heat and light. The amount of nuclear fuel ( hydrogen helium) present in the sun indicate that it can continue glowing at this state for another 5 or 5.5 billion years more. Sun formed abut 4.6 or 5 billion years ago, as shown from the calculations.
Two balls are placed near one another and hang down, as
shown below.
Which conclusion is supported by this evidence?
Neither ball has a charge.
The balls are both positively charged.
One ball is positively charged, and the other is negatively
charged
Each ball has a charge, but the type of charge is
unknown
Mark this datum
Save and Exit
Submit
Answer:
Neither ball has a charge.
Explanation:
Conclusion 1 is supported by this evidence. Neither ball has a charge. because the charge is in hanging condition neither attract nor repel each other.
What is the charge?When the matter is put in an electromagnetic field, it has an electric charge, which causes it to experience a force. A positive or negative electric charge can exist.
Charges that are similar repel each other, whereas charges that are dissimilar attract each other. The term "neutral" refers to an item that has no net charge.
The charge is in hanging condition neither attract nor repel each other. Shows neither ball has a charge.
Hence conclusion 1 is supported by this evidence.
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what is a goal of the planned missions MIRI?
the answer is to explore the kupier belt
Answer:
Its goal is to explore the Kupier Belt, a region in space where comets originate
Explanation:
The Mid-Infrared Instrument (MIRI) is a telescope with abilities to see the mid-infrared region of the electromagnetic spectrum.The wavelength of this instrument is 5-28 microns. The Kupier belt is a region in space beyond Neptune.MIRI was developed to enable scientists study and explore the kupier belt to observe the far most galaxies, new stars that are formed and the comets invisible from the previous telescopes.
Exploring the Kuiper Belt is a common objective for certain space missions. Previous missions like the NASA Pioneers 10 and 11 helped pave the way for future explorations, which now include plans to explore moons like Europa for signs of life.
Explanation:The planned missions that this question refers to are likely spacecraft designed to explore the outer regions of our solar system, including destinations such as the Kuiper Belt. The primary goal of such missions is often to gather data about the composition, structure, and the variety of objects within the Kuiper Belt. Notable examples of past missions with similar objectives include NASA's Pioneers 10 and 11 which were pioneers in interplanetary space travel, aiming to assess the feasibility of navigating through the asteroid belt beyond Mars and to measure radiation hazards in Jupiter's magnetosphere. They provided essential data that informed the design of future space missions. An upcoming significant mission is the Europa Clipper, which aims to explore Europa, one of Jupiter's moons, to understand its subsurface ocean and the potential for life there.
Urgent!!!!!! 20 points!!!!!!
how are the speed, wavelength and frequency of a wave related
Answer:
The higher the frequency, the shorter the wavelength. Because all light waves move through a vacuum at the same speed, the number of wave crests passing by a given point in one second depends on the wavelength. Speed shows how long it takes for wavelengths to travel.
Denise is conducting a physics experiment to measure the acceleration of a falling object when it slows down and comes to a stop. She drops a wooden block with a mass of 0.5 kilograms on a sensor on the floor. The sensor measures the force of the impact as 4.9 newtons. What’s the acceleration of the wooden block when it hits the sensor? Use F = ma.
A.
2.45 m/s2
B.
4.4 m/s2
C.
5.4 m/s2
D.
9.8 m/s2
Answer:
D!
Explanation:
Using the formula F = ma, you plug in 4.9 for F (force), and 0.5 for m (mass), then solve for a (acceleration).
Answer:
9.8 m/s^2
Explanation:
F=ma
The force is 4.9 N
The mass is 0.5 kg
The acceleration is what we are trying to figure out.
(Now, plug into the equation)
4.9= 0.5a
Take 4.9/0.5 to find the value of a, which is 9.8m/s^2
calculate the change in potential energy of a body of mass 2kg that is lifted through a height of 10m above the ground level. if this 2kg mass is allowed to fall, what will be it kinetic energy before hitting the ground
Answer:
Use the potential energy formula
Explanation:
PE=mgh
m=mass=2kg
g=gravitational force=-10
h=height=10m
Potential energy is 200 Joule is same as kinetic energy before hitting the ground.
What is gravitational potential?Gravitational potential energy is energy an object possesses because of its position in a gravitational field. The most common use of gravitational potential energy is for an object near the surface of the Earth where the gravitational acceleration can be assumed to be constant at about 9.8 m/s².
PE = mgh
mass, m = 2kg
gravitational force, g = -10
height, h=10m
PE = 2*10*10 = 200 joule
Potential energy change to kinetic energy before hitting the ground.
Potential energy is 200 Joule is same as kinetic energy before hitting the ground.
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A lightbulb has a power of 100 W and is used for 4 hours. A microwave has a power of 1200 W and is used for 5 minutes. How much energy is used by the lightbulb? How much energy is used by the microwave? The lightbulb has an efficiency of 1.8%. How much heat energy does the lightbulb produce in 4 hours?
Answer:
a. E=1440KJ
b. E=360KJ
c. E=1.8 J
Explanation:
I have the power (Watts) is expressed as Energy (Joules) / Time (seconds), also I have to[tex]1hour * \frac{60min}{1hour}*\frac{60s}{1min}\\1h=3600s[/tex]
so, for the lightbulb
[tex]100W= \frac{Energy}{3600s*4}\\Energy=100W*14400s\\ E=1440000J =1440KJ[/tex]
Analogously, for the microwave
[tex]1200W= \frac{Energy}{60s*5}\\Energy=1200W*300s\\ E=360000J =360KJ[/tex]
Now, I have to express the efficiency as Heat energy / power * 100 so[tex]1.8= \frac{Heat Energy}{100W}*100\\Heat Energy=1.8J[/tex]
Done
Find the acceleration of the block.
Answer:
C. 7 m/s²
Explanation:
The horizontal forces acting on the block are the 80 N tension, the 60 N tension, and friction. Apply Newton's second law:
∑F = ma
80 N − 60 N − F = (10 kg) (1 m/s²)
20 N − F = 10 N
F = 10 N
If S₁ goes away, the acceleration becomes:
∑F = ma
80 N − 10 N = (10 kg) a
70 N = (10 kg) a
a = 7 m/s²
what is the net force if one person is pushing on a box with 60 N of force to the right and another person is pushing on the box with 30 N of force to the left?
Answer:
The net force on the box is 30 N to the right.
Explanation:
To find the net force on the box, we must add all of the forces together. In order to do this successfully, we must establish a positive and a negative direction. Let’s say that the positive direction is towards the right and the negative direction is towards the left.
Knowing this, we can set up the following equation:
Net force = F1 + F2
Now we can substitute in our known values for the forces given in the problem.
Net force = 60 N + (-30 N)
If we simplify and solve, we get
Net force = 60-30 = 30 N
Since we established the right as the positive direction, we know that the answer is 30 N to the right. If we think about this problem conceptually, this answer makes sense because the 30 N force to the left cancels out 30 N of the force towards the right, because they are acting in opposite directions.
Hope this helps!
How are volcanoes and wind similar? A. They both create igneous rock. B. They both can be constructive forces. C. They both form deltas. D. They are both a form of physical weathering.
B. They both can be constructive forces.
Both volcanos and wind can shape the landscape... volcanos using eruptions and lava, wind using wind erosion when it gets "windy".
Hope this helps.
r3t40