Answer:
Frozen water molecules vibrate more and more until they break free of the ice crystal. Liquid water molecules move faster and faster until they break free of the liquid.
Until all the bonds keeping the molecules in a crystal structure are broken, nothing can be done to raise the kinetic energy of the molecules in the liquid state. Thus, the temperature doesn't change until all the ice has melted. When water is heated to boiling point, the same thing occurs.
What are the melting point and boiling point?Melting point, the temperature at which a pure substance's solid and liquid states can coexist in equilibrium. A solid's temperature rises when heat is added to it until it reaches the melting point. The solid will then become a liquid with no change in temperature with the addition of more heat.
The temperature at which the pressure of a liquid exerted by its surroundings equals the pressure of the liquid's vapor is known as the boiling point. At this temperature, the addition of heat causes the liquid to turn into its vapor without rising the temperature.
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Which of the following are conditions required for static equilibrium? Select TWO answers. Elimination Tool A Linear Momentum = →p=0. B:Angular Momentum = →L=0. C:Change in Energy = ΔEtotal=0. D: Net Force ≠0.
Answer:
The correct answers are Choices 'A' and 'B'.
Explanation:
The correct answers are Choices 'A' and 'B'.
Static equilibrium means that the object is not moving relative to a given frame of reference.
Choice 'A' Linear Momentum = →p=0
is required. "Not moving" means the velocity
v must be 0(otherwise the object would be moving across the reference frame), so an object's linear momentum (which is its mass times its velocity) must be 0.
Choice 'B' Angular Momentum = →L=0 is required. "Not moving" also means that the object can not be rotating or spinning inside the reference frame, which means the rotational velocity ω must be 0. So an object's angular momentum (which is its mass times its rotational velocity) must be 0 .
Choice 'C' Change in Energy is true (this is known as conservation of energy), but it is not a requirement of static equilibrium because "not moving" is not the same as "isolated."
There are many forms of energy, many of which are not related to movement. For example, a light bulb in a stationary lamp is in static equilibrium, but if the light is turned on .
Similarly, when you add gasoline to your car at a gas station, the car must be in static equilibrium, but the addition of the gasoline from outside the car changes the Total Energy of the car.
Choice 'D' Net Force ≠0 is a non-equilibrium condition because by Newton's second law of motion, so any non-zero net force will cause an acceleration, and acceleration is not a state of static (or dynamic) equilibrium.
Trace the changes that take place in a flower from gamete formation to fruit
formation.
5
36 In the given circuit, A, B, C and D are four lamps connected with a battery of
60V.
Analyse the circuit to answer the following questions.
(i) What kind of combination are the lamps arranged in (series or parallel)?
(ii) Explain with reference to your above answer, what are the advantages (any
two) of this combination of lamps?
(iii) Explain with proper calculations which lamp glows the brightest?
(iv) Find out the total resistance of the circuit.
Pollination is the transfer of pollen for plant fertilization
The correct responses are as follows;
The description of the changes that take place is included in this response
6 (i) The circuit arrangement is a parallel circuit arrangement
(ii) The advantages are;
Brighter bulbsHigher uptime of the bulbs(iii) Lamp C glows the brightest
(iv) The total resistance is 4 Ω
The reason roe the above responses are as follows:
During the course of pollination, the pollen, through movement, finds it way to the germ-cell in the female ovary, where it fuses with the female egg (gamete) located inside the ovule
The resulting fertilization produces the zygote, which forms an embryo inside the ovule by dividing several times
A seed is formed from the ovule when it develops a tough coat, and by rapid growth a fruit is formed as the ovary matures
5 (i) The kind of combination, where all the wires that enters the bulb are joined on one side of the bulbs, and all the wires that comes from the bulbs are joined on the other end of the bulb, before joining the circuit is a parallel connection
(ii) The advantages of bulbs connected in parallel are;
The voltage available in the power source reaches all the bulbs. That is each bulb had the voltage of the power source across it and therefore, is brighter than when the bulbs are arranged in seriesOther bulbs remain functional following the disconnection of one of the bulbs or loops(iii) The bulb that glows brightest is given by the bulb that consumes the most energy per unit time, and therefore, the bulb that has the most power
Power consumed by each bulb is given as follows;
Bulb A, [tex]P_A[/tex] = 3 A × 60 V = 180 W
Bulb B, [tex]P_B[/tex] = 4 A × 60 V = 240 W
Bulb C, [tex]P_C[/tex] = 5 A × 60 V = 300 W
Bulb D, [tex]P_D[/tex] = 3 A × 60 V = 240 W
The highest power used by a bulb is 300 W, by bulb C
Therefore;
Bulb C is the brightest bulb
(iv) The total resistance of the circuit is given as follows;
[tex]Total \ resistance =\dfrac{Circuit \ voltage}{Total \ current}[/tex]
Total current, [tex]I_{tot}[/tex] = 3 A + 4 A + 5 A + 3 A = 15 A
Circuit voltage, V = 60 V (Given)
Therefore, we have;
[tex]Total \ resistance =\dfrac{60 \, V}{15 \, A} = 4 \, \Omega[/tex]
The total resistance is 4 Ω
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whats this symbol?
∑
the unit of mass is fundamental unit
Answer:
Kilogram and symbol kg.
A high-speed train travels with an average speed of 227 km/hr. The train travels for 2 hrs. How far does the train travel?
Answer: The answer would be 454 miles.
Explanation: You multiply the average speed by time travelled
If a race car wants to change its velocity then a net force is
required to cause the necessary
Answer:acceleration
Explanation:
We define acceleration as the rate of change of velocity. So if a moving object wants to change its velocity, it needs to accelerate.
Thus the statement would be:
"If a race car wants to change its velocity then a net force is required to cause the necessary acceleration".
--------------------------------
Acceleration defines how the velocity changes, suppose that you are in one dimension and you move with positive velocity, if you have also positive acceleration your velocity will increase.
If you have negative acceleration your velocity will decrease.
But if we go to 2 dimensions we can see that acceleration is way more complex, because it is what allows the changes of direction of motion (by changing the direction of the velocity).
Now, acceleration comes from Newton's second law of motion:
F = m*a
Force equals mass times acceleration.
Then if we know that a car wants to change its velocity, it needs to apply a force such that it causes the necessary acceleration to change the velocity as wanted.
From this we can see that the complete statement would be:
"If a race car wants to change its velocity then a net force is required to cause the necessary acceleration"
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When the Northern hemisphere is tilted towards the sun, it is ___ in the northern hemisphere and ___ in the southern hemisphere
Summer in the northern
Winter in the southern
How do I answer number 5?
Answer:
He needs to throw the trash before he gets to the Trash can because he
needs some force for it to be able to go in because it he throw it after he passed it, it would not make it because your going a certain speed, and if you try to throw it when it is right in front of you, it will still miss because it is still going the same speed as the car.
Explanation:
Hope that helps you :)
jet aeroplanes and rockets work on the principal of newton's third law of motion. explain. fast I will mark brainly
Answer:
Explanation:
According to Newton's third law of motion, every action has an equal and opposite reaction. When a rocket starts, it releases some gases which exerts and equal and opposite force which helps the rocket to move.
Hope this helps
plz mark as brainliest!!!!!!
Solve the following exercises and discuss your results with your classmates and teacher.
1. The initial, final position and displacement of a particle are:
a) xi = 20m, xf = 6m How much did it move?
b) xi = 10km, Δx = –15km, what is the final position of the particle?
2. An athlete jogs from one end of a straight 80m track to the other:
a) What is your one-way displacement?
b) What is your return displacement? (taking negative direction back)
c) What is its displacement in the total trot?
d) What is your one-way distance?
e) What is your total trot distance?
3. In a circular skating lane whose radius is 96 m, the skater begins to move from point A
to point B which is at the opposite end. Consider the path to be a semicircle
a) What is its displacement?
b) What is the distance traveled?
Answer:
5379393 is the answer of the question
Explanation:
mark me as BRAINLIEST
1. What is the new kinetic energy of the 1900kg ship on the right moving at 4 m/s?
2. If the 0.10kg baseball on the right has a kinetic energy of 5 J, what is its velocity?
3. if the mosquito on the right is moving at 10 m/s anx has the the kinetic energy of 0.25 J, what is its mass?
Explanation:
That`s is the answer, just check
What is the average speed (in miles per hour) of the car that traveled a total of 200 miles in 5.5 hours
Answer:
Average speed of the car is 36.36 miles per hour
Explanation:
It is given that,
Total distance traveled by the car, d = 200 miles
Total time taken, t = 5.5 hours
In this case, we have to find the average speed of the car. Average speed of the car is defined as the total distance divided by total time taken. Mathematically, it can be written as :
s = 36.36 miles per hour
Hence, the average speed of the car is 36.36 miles per hour. \
A car moving at 30 m/s has 900 kj of kinetic energy. What is the car’s mass?
If a car moving at 30 m / s has 900 kJ of kinetic energy, then the mass of the car would have been 2000 kilograms.
What is mechanical energy?Mechanical energy is the combination of all the energy in motion represented by total kinetic energy and the total stored energy in the system which is represented by total potential energy.
As for the given problem, we have to find out the mass of the car if the car moving at 30 m/s has 900 kJ of kinetic energy.
Kinetic energy = 1 / 2 m v²
900000 = 0.5 × m × 30²
m = 1000 / 0.5
= 2000 kilograms
Thus, If a car moving at 30 m / s has 900 kJ of kinetic energy, then the mass of the car would have been 2000 kilograms.
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need help this is timed
To strike or hit something with great force
Answer:
To strike or crash into with resounding impact. To collide or strike with great force. Used to indicate the sound of a forceful blow or collision.
Answer:
To strike or crash into with resounding impact. To collide or strike with great force. Used to indicate the sound of a forceful blow or collision.
Explanation:
If the force acting on a cart doubles, what happens to the carts acceleration?
Answer:
If the force on a cart doubles, the acceleration of the cart doubles.
Explanation:
For this problem, we need to consider the following equation:
Force = Mass x Acceleration
We can reasonably assume that the cart will have constant mass in the given force system. With this assumption we can say the following relationship:
Force is directly proportional to Acceleration within the system.
Given that our force on the cart is doubled, then our acceleration of the cart must also be doubled. You can mathematically express this as follows:
F = MA
2F = M * 2A
Hence, if force doubles, the acceleration doubles.
Cheers.
HELP
What’s the input and output force of a stapler
:)
Answer:
The input force is the force that when you push down and the output force is the stable going into the paper.
Explanation:
I really hope this helps ;)
Answer: yes
Explanation:
because so
Susie estimated that she can run for hours at a steady speed of 8m/h. She enters a
marathon, a distance of 26meters. How long should it take her to complete the race?
Time = (distance) / (speed)
Time = (26 meters) / (8 meters/hour)
Time = 3.25 hours or 3 hours 15 minutes
In 1996, Michael Johnson ran 200.0 m in 19.32 s. Johnson's mass at the time
of his record-breaking run was about 77 kg. What was his momentum at his
average speed?
================================================
Work Shown:
velocity = (change in distance)/(change in time)
velocity = (200.0 meters)/(19.32 seconds)
velocity = (200.0/19.32) meters per second
velocity = 10.351966873706 meters per second
velocity = 10.35 m/s after rounding to 4 sig figs
------------------
Momentum = (mass)*(velocity)
Momentum = (77 kg)*(10.35 m/s)
Momentum = (77*103.5) kg m/s
Momentum = 796.95 kg m/s
------------------
Edit: Corrected from 2000.0 to 200.0
In a electrically natural atom of any element there are equal numbers of
Answer: Atoms are electrically neutral because they have equal numbers of protons (positively charged) and electrons (negatively charged). If an atom gains or loses one or more electrons, it becomes an ion.
In a full sentence, explain the difference between static charge and static shock.
Answer:
The most significant difference between the static and current electricity is that in static electricity the charges are at rest and they are accumulating on the surface of the insulator. Whereas in current electricity the electrons are moving inside the conductor.
Roxy weighs 120 lbs and dead lifts 150 lbs. What is her absolute strength?
Answer:
Absolute strength = 1.25
Explanation:
Given:
Body weight of body = 120 lbs
Body weight of thing = 150 lbs
Find:
Absolute strength
Computation:
Absolute strength = Body weight of thing / Body weight of body
Absolute strength = 150 / 120
Absolute strength = 1.25
A motorcycle travels at a constant 20 m/s for 10 s. How far has it traveled?
d =200 m
Explanation:Hi there !
Velocity formula
v = d/t => d = v×t
d = distance
t = time
d = 20m/s×10s = 200 m
Good luck !
some things are difficult for science to observe so ______ are built in order to study these phenomena
Answer:Describe how scientists study the natural world. Explain ... In this way, scientists gradually build an increasingly accurate and detailed ... Science rests on evidence and logic, so it deals only with things that can be observed. ... This is a drawback, because it may make the observations difficult to interpret.
Explanation:
Answer:
Models
Explanation:
Which particle (proton, neutron, or electron) has a negative charge?
Answer:
electrons
Explanation:
it just does
It took a squirrel 0.50 s to run 5.0 meters leftward to a nearby tree while maintaining a constant acceleration. The squirrel was running 15 m/s leftward when it reached the tree. What was the squirrel's initial velocity?
It took a squirrel 0.50 s to run 5.0 m leftward when it reached the tree while maintaining a constant acceleration. The squirrel was running 15 m/s leftward when it reached the tree.
What was the squirrel's initial velocity?
Answer: -5
The initial velocity of the squirrel is 5m/s. Initial velocity is a vector quantity.
What is Acceleration?Acceleration is the rate of change of the velocity of an object with respect to the time. Acceleration is the vector quantity.
The initial velocity of the object can be calculated by the following equation:
s = 1/2 (u + v) t
5.0 = 1/2 (u + 15) × 0.50
10 = (u + 15) × 0.50
10 / 0.50 = (u + 15)
20 = (u + 15)
u = 20 - 15
u = 5m/s
Thus, the squirrel's initial velocity before getting startled is 5 meters per second.
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why do some objects fall faster than others?
Answer:
Weight and Mass !!!!!!
Explanation:
Galileo discovered that objects that are more dense, or have more mass, fall at a faster rate than less dense objects, due to this air resistance. A feather and brick dropped together. Air resistance causes the feather to fall more slowly.
a ball weighs 0.25 kg and is moving at 15 m/s. what is the momentum of the ball?
Answer:
The answer is 3.75 kgm/sExplanation:
The momentum of an object given it's mass and velocity can be found by using the formula
momentum = mass × velocityFrom the question
mass = 0.25 kg
velocity = 15 m/s
We have
momentum = 0.25 × 15
We have the final answer as
3.75 kgm/sHope this helps you
A boy pulls a wovon with a force or 6 Neast as another boy pushes it
with a force of 4 N east. What is the net force?
Answer:
The net force is 10 N.
Explanation:
A "net force" occurs when a particular object accelerates. It refers to the total number of forces that act on an object.
The boy pulling the cart and the other pushing it do their actions in the same direction. The force of pulling is 6 N while the force of pushing is 4 N. This means that the total force will not be cancelled.
To get the net force, add both forces since they are in the same direction (east).
Net force = 6 N + 4 N
Net force = 10 N (Newtons)
Which statement accurately describes the atmospheres of the inner planets?
Mars has no atmosphere.
Mercury has a thick atmosphere.
Mars and Venus have similar atmospheres.
Earth and Venus have similar atmospheres.
Answer:
Mars and venus have similar atmospheres
Answer:
Earth and Venus have similar atmospheres
Explanation:
