second. Give answer in km/hr
1) Calculate the speed at which a wheel is traveling if it has a radius of 30cm and an angular speed of 20 radians per
Answers
speed = 0.30 x 20 = .... m/s
Related Questions
A 63-kg rock-climber is being pulled up the last 5.9 s of her climb by a rope. Her speed increases from 0 m/s to 2.9 m/s as she is being pulled upward. How much tension force is she applying to the rope?
Answers
The tension force the climber is applying to the rope is 926.34 N.
How do you calculate a rope's tension given its bulk and angle?The magnitude of strain (T) is the same for both ropes when the angles of suspension () are the same for two ropes. Use the equation 2T sin() = m g to calculate the tension, where m g is the weight of the suspended item.
To calculate the tension force, we can use the expression shown below:
Tension force = (mass * acceleration) + weight
We can apply the following kinetic equation to determine the climber's upward acceleration:
v = u + at
where the end speed is 2.9 m/s, the starting speed is 0 m/s, the acceleration is a, and the time is t. (5.9 s).
When we rearrange this solution to account for a, we obtain:
a = (v - u) / t
a = (2.9 m/s - 0 m/s) / 5.9 s
a = 0.492 m/s²
We can now enter the numbers into the first equation as follows:
Tension force = (mass * acceleration) + weight
Tension force = (63 kg * 0.492 m/s^2) + (63 kg * 9.81 m/s²)
Tension force = 308.91 N + 617.43 N
Tension force = 926.34 N
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a rod is at rest. a piece of clay collides with the edge of it and sticks, so they rotate together counterclockwise around the frictionless axle at the other edge. how does the angular momentum of the rod (not the rod-clay system) change as the clay collides?
Answers
When the clay collides with the rod and sticks to it, the angular momentum of the rod changes. Angular momentum is a measure of the rotational motion of an object and is given by the product of its moment of inertia and angular velocity.
Before the collision, the rod is at rest, meaning its angular velocity is zero. However, as the clay collides with the rod and sticks to it, the system gains angular momentum due to the transfer of momentum from the clay to the rod. This causes the rod to start rotating counterclockwise around the frictionless axle.
The moment of inertia of the system changes because the clay adds to the overall mass distribution of the rod. The moment of inertia is a measure of an object's resistance to changes in its rotational motion and is dependent on both mass distribution and the object's shape.
As the clay collides and sticks to the rod, the moment of inertia increases, which in turn affects the angular velocity. According to the principle of conservation of angular momentum, the product of moment of inertia and angular velocity remains constant in the absence of external torques.
Therefore, as the moment of inertia increases due to the addition of the clay, the angular velocity of the rod decreases to maintain a constant angular momentum. This decrease in angular velocity is what causes the rotation of the rod to slow down.
In summary, the angular momentum of the rod changes as the clay collides and sticks to it. The moment of inertia increases due to the addition of the clay, which causes the angular velocity of the rod to decrease. This change in angular velocity allows the rod and clay to rotate together counterclockwise around the frictionless axle.
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Hi can someone help me please ,Let d= 1 for second part
Answers
2)
\(F=2.3097\cdot10^{48}\text{ Newtons}\)Explanation
the electrostatic force between two forces is given by:
\(\begin{gathered} F=k\frac{q_1q_2}{d^2_{}} \\ where\text{ } \\ k\text{ is a constant}(in\text{ this case we n}eed\text{ asume k=1)} \\ q_1\text{ is the charge 1} \\ q_2\text{ is the charge }2 \\ \text{and d is the distance betw}en\text{ them} \end{gathered}\)then, complete the table we need to use this equation
where
\(F=k\frac{q_1q_2}{d^2_{}}\)k, q1 and q2 are ginven in the table, so
Step 1
Let
\(\begin{gathered} charge_1=\frac{1}{4} \\ charge_2=1 \\ \text{distance}=1 \end{gathered}\)so,replace
\(\begin{gathered} F=k\frac{q_1q_2}{d_{}} \\ F=1\frac{\frac{1}{4}\cdot1}{1_{}}=\frac{1}{4} \end{gathered}\)hence, for tha row
\(\begin{gathered} \frac{1}{4}F_e \\ \end{gathered}\)Step 2
now, do the same for the next Fe, so
b)Let
\(\begin{gathered} charge_1=1 \\ charge_2=\frac{1}{2} \\ \text{distance}=1 \end{gathered}\)so,replace
\(\begin{gathered} F=k\frac{q_1q_2}{d_{}} \\ F=1\frac{1\cdot\frac{1}{2}}{1_{}}=\frac{1}{2} \end{gathered}\)hence, for tha row
\(\begin{gathered} \frac{1}{2}F_e \\ \end{gathered}\)Step 3
now, do the same for the next Fe, so
c)Let
\(\begin{gathered} charge_1=1 \\ charge_2=\frac{1}{4} \\ \text{distance}=1 \end{gathered}\)so,replace
\(\begin{gathered} F=k\frac{q_1q_2}{d_{}} \\ F=1\frac{1\cdot\frac{1}{4}}{1_{}}=\frac{1}{4} \end{gathered}\)hence, for that row
\(\begin{gathered} \frac{1}{4}F_e \\ \end{gathered}\)Step 4
now, do the same for the next Fe, so
c)Let
\(\begin{gathered} charge_1=\frac{1}{2} \\ charge_2=\frac{1}{2} \\ \text{distance}=1 \end{gathered}\)so,replace
\(\begin{gathered} F=k\frac{q_1q_2}{d_{}} \\ F=1\frac{\frac{1}{2}\cdot\frac{1}{2}}{1_{}}=\frac{1}{4} \end{gathered}\)hence, for tha row
\(\begin{gathered} \frac{1}{4}F_e \\ \end{gathered}\)Step 5
now, do the same for the next Fe, so
c)Let
\(\begin{gathered} charge_1=\frac{1}{8} \\ charge_2=\frac{1}{4} \\ \text{distance}=1 \end{gathered}\)so,replace
\(\begin{gathered} F=k\frac{q_1q_2}{d_{}} \\ F=1\frac{\frac{1}{8}\cdot\frac{1}{4}}{1_{}} \\ F=1\frac{\frac{1}{32}}{1_{}}=\frac{1}{32} \end{gathered}\)hence, for that row
\(\begin{gathered} \frac{1}{32}F_e \\ \end{gathered}\)Step 6
find the electrostastic force betweeen electrons
let
\(\begin{gathered} q_1=q_2=-\text{1}.602\cdot10^{19}\text{ C} \\ k=9\cdot10^9\frac{Nm^2}{C^2} \end{gathered}\)as the distance is not give, let's use
distance =1
replace in the formula
\(\begin{gathered} F=k\frac{q_1q_2}{d_{}} \\ F=9\cdot10^9\frac{Nm^2}{C^2}\frac{(^2-\text{1}.602\cdot10^{19}C)}{1_{}} \\ F=2.3097\cdot10^{48}\text{ N} \end{gathered}\)therefore, the electrostaic force is
\(F=2.3097\cdot10^{48}\text{ Newtons}\)I hope this helps you
the lungs are ___________ to the heart
Answers
Answer:
The lungs are lateral to the heart.
Explanation:
Answer:
lateral
Explanation:
Which combination of frequencies would produce the lowest beat frequency? (1 point)
500 Hz and 501 Hz
10 Hz and 20 Hz
10 Hz and 15 Hz
500 Hz and 600 Hz
Answers
The combination of frequencies that produce the lowest beat frequency is 10 Hz and 15 Hz. The correct option is C.
To determine the beat frequency, we subtract one frequency from the other and take the absolute value. The beat frequency is the difference between the frequencies involved in the interference pattern created by two sound waves.
Let's analyze each option:
A. 500 Hz and 501 Hz: The beat frequency would be 501 Hz - 500 Hz = 1 Hz.
B. 10 Hz and 20 Hz: The beat frequency would be 20 Hz - 10 Hz = 10 Hz.
C. 10 Hz and 15 Hz: The beat frequency would be 15 Hz - 10 Hz = 5 Hz.
D. 500 Hz and 600 Hz: The beat frequency would be 600 Hz - 500 Hz = 100 Hz.
Therefore, option C (10 Hz and 15 Hz) produces the lowest beat frequency of 5 Hz compared to the other options.
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Please someone help me with this physics work.
Answers
Answer:
The first reactant is methane, the next is oxygen, the first product is carbon dioxide and the second product is water.
The word equation is:
methane + oxygen → carbon dioxide + water
The balanced symbol equation is:
CH₄ + 2O₂ → CO₂ + 2H₂O
Explanation:
In any combustion reaction, fuel is burned in the presence of oxygen to produce carbon dioxide and water.
An equation is balanced when there are the same number of atoms of each element on both sides of the arrow.
Hope this helps!
A motorbike reaches a speed of 20 m/s over 60m, whilst
accelerating at 3m/s?, determine the bike's initial speed.
Answers
Initial speed = 2√10 m/s
Further explanationLinear motion consists of 2: constant velocity motion with constant velocity and uniformly accelerated motion with constant acceleration
An equation of uniformly accelerated motion
V = vo + at
Vt² = vo² + 2a (x-xo)
x = distance on t
vo / vi = initial speed
vt / vf = speed on t / final speed
a = acceleration
vf=20 m/s
d = 60 m
a = 3 m/s²
\(\tt vf^2=vi^2+2.ad\\\\20^2=vi^2+2\times 3\times 60\\\\400=vi^2+360\\\\40=vi^2\\\\vi=\sqrt{40}=2\sqrt{10}~m/s\)
Two parallel-plate capacitors, identical except that one has twice the plate separation of the other, are charged by the same voltage source. Which capacitor has a stronger electric field between the plates
Answers
The capacitor with the smaller plate separation will have a stronger electric field between the plates.
The electric field strength in a capacitor is determined by the voltage applied across the capacitor and the distance between the plates. According to the principles of electrostatics, the electric field strength is directly proportional to the voltage and inversely proportional to the plate separation. In other words, when the voltage applied across the capacitor increases, the electric field strength between the plates also increases. Conversely, when the plate separation decreases, the electric field between the plates becomes stronger. This relationship illustrates how adjusting the voltage and plate separation can control the electric field strength in a capacitor, which is a crucial factor in its operation and functionality.
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the evidence that an asteroid did hit earth at the kt boundary is strong. but did it cause extinction of the dinosaurs? what additional hypotheses are scientists investigating?
Answers
The evidence supporting the impact of an asteroid at the Cretaceous-Paleogene (K-Pg) boundary, also known as the KT boundary, is indeed strong.
The evidence supporting the impact of an asteroid at the Cretaceous-Paleogene (K-Pg) boundary, also known as the KT boundary, is indeed strong. The most notable piece of evidence is the discovery of a large impact crater called the Chicxulub crater in the Yucatan Peninsula of Mexico, dating back to approximately 66 million years ago. This impact event is believed to have had significant global consequences, including widespread environmental changes.
The extinction of the dinosaurs and many other species at the KT boundary is widely attributed to the asteroid impact. However, the exact mechanisms and the extent of the impact's role in the extinction event are still subjects of ongoing scientific investigation. While the asteroid impact is considered a major factor, other hypotheses and additional research areas are being explored to gain a comprehensive understanding of the extinction event. Some of these hypotheses include:
Climate Change: The asteroid impact is believed to have caused massive climate disturbances, including a period of global cooling due to the release of dust and aerosols into the atmosphere. However, the long-term effects on the climate and the subsequent impact on ecosystems and species survival are still under investigation.Volcanic Activity: Coinciding with the asteroid impact, there was significant volcanic activity in the Deccan Traps in modern-day India. Scientists are exploring the potential synergistic effects of the asteroid impact and volcanic eruptions in amplifying the environmental disruptions and contributing to the extinction event.Habitat Destruction: The combination of immediate and long-term effects of the asteroid impact, such as wildfires, tsunamis, and alteration of the global environment, likely caused widespread habitat destruction. Investigating the extent and duration of these changes is crucial to understanding their impact on ecosystems and species survival.Ecological Factors: Scientists are examining the ecological dynamics and species interactions during the Cretaceous period to better understand how different species responded to the environmental changes triggered by the asteroid impact. Factors such as competition, predation, and species resilience are being studied to gain insights into the extinction patterns.Recovery and Succession: Investigating the post-extinction recovery and the subsequent emergence of new species and ecosystems is also an area of interest. Understanding how life rebounded and diversified in the aftermath of the extinction event provides valuable insights into the long-term consequences of the asteroid impact.It's important to note that while the asteroid impact is considered a leading cause of the extinction event, other factors may have also played a role. Scientists continue to study and analyze various lines of evidence to refine our understanding of this significant event in Earth's history.
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Please answer these 4 questions. I need them before 11:59 MST (10/3/22).
Answers
The distance travelled by the object in the first 2.5 seconds is 45 m.
The time when the object changes direction is 9.7 seconds.
The distance traveled by the object t₁ and t₂ is 64.8 m.
The velocity of the object at time, t₃ = 16.9 s is -42.25 m/s.
Distance travelled by the object in the first 2.5 secondsThe distance traveled by the object in the first 2.5 seconds is calculated as follows;
d(2.5 s) = vt
where;
v is velocityt is timed(2.5 s) = 18 m/s x 2.5 s
d(2.5 s) = 45 m
Time when the object changes directionUse the formula for average acceleration as shown below.
a = Δv/Δt
where;
Δv is change in velocityΔt is change in timea = (V - 0)/(t₂ - t₁)
2.5 = (18 - 0) / (t₂ - 2.5)
2.5 = (18)/(t₂ - 2.5)
(t₂ - 2.5) = 18/2.5
t₂ - 2.5 = 7.2
t₂ = 7.2 + 2.5
t₂ = 9.7 s
Distance traveled by the object t₁ and t₂The distance traveled by the object t₁ and t₂ is calculated as follows;
d = ¹/₂(t₂ - t₁)(v)
where;
t₂ is final timet₁ is initial timev is velocityd = ¹/₂(9.7 - 2.5)(18)
d = 64.8 m
Velocity of the object at time, t₃ = 16.9 sThe velocity of the object at time, t₃ = 16.9 s is calculated as follows;
v₃ = v₂ + at₃
where;
v₃ is final velocityv₂ is initial velocitya is accelerationv₃ = 0 + (-2.5)(16.9)
v₃ = -42.25 m/s
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Rock 1, of mass m, reaches a maximum height hmax after being launched. During the time between the instant rock 1 is launched from height h0 and the instant it returns to height h0, the work done on the rock by the gravitational force is
Answers
The work done on the rock when it reaches maximum height is by gravitational force is 9.8mh (J).
Work done on the rock by gravitational force
The work done on the rock by the gravitational force is determined as follows;
P.E = mgh
where;
m is mass of the rockh is the maximum height reached by the rockg is acceleration due to gravityP.E = m x 9.8 x h(max)
P.E = 9.8mh (J)
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Increased levels of oxygen in the atmosphere due to photosynthesis caused rates of weathering to____
which aided in the formation of____
1. A.Increase
B. Decrease
C. Remain constant
2. A. Chloroplast
B. Roots
C. Soil
Answers
2. C: Soil
Increased levels of oxygen in the atmosphere due to photosynthesis caused rates of weathering to increases which aided in the formation of soil.
What is photosynthesis ?The process in which use of solar energy occur by plants, algae and certain bacteria convert them into chemical energy and starch called as photosynthesis.
Photosynthesis occur in chloroplast of the green plant which has its own DNA, genes and synthesize their own proteins.
photosynthetic Pigments are also involve in this process which is responsible for trapping sunlight present in chlorophyll pigment of chloroplast, like chlorophyll a, b and c.
some of the Bacteria have chlorophyll known as bacteriochlorophyll which can absorb infrared rays, Carotenoids which are yellow, orange or red-coloured pigments that absorb bluish-green light., Xanthophyll, Phycobilins.
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A converging mirror with a focal length of 7cm is held 4cm from your face. Determine the image location?
Answers
The image is approximately 9.33 cm away from the mirror, on the object's side.
To determine the image location formed by a converging mirror, we can use the mirror equation:
1/f = 1/d_o + 1/d_i
where:
f is the focal length of the mirror,
d_o is the object distance (distance of the object from the mirror), and
d_i is the image distance (distance of the image from the mirror).
In this case, the focal length (f) is given as 7 cm, and the object distance (d_o) is 4 cm.
Plugging in the values into the mirror equation:
1/7 = 1/4 + 1/d_i
To find the image distance (d_i), we can solve for it:
1/d_i = 1/7 - 1/4
1/d_i = (4 - 7) / (4 * 7)
1/d_i = -3 / 28
Taking the reciprocal of both sides:
d_i = 28 / -3
d_i ≈ -9.33 cm
The negative sign indicates that the image formed by the converging mirror is virtual and located on the same side as the object.
Therefore, the image is approximately 9.33 cm away from the mirror, on the object's side.
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what is a purpose in flexibility
Answers
Answer:
To prevent from getting injured.
it can prevent us from various accident a
planetary boundaries concept is a recent scientific framework, which identifies a set of nine bio-physical limits
Answers
the planetary boundaries concept is a recent scientific framework that identifies nine bio-physical limits for Earth's systems. By understanding and respecting these boundaries, we can work towards sustainable practices and minimize the risks of irreversible environmental changes.
The planetary boundaries concept is a scientific framework that aims to identify and understand the limits of Earth's bio-physical systems. It provides a way to assess and manage the impact of human activities on the planet. The concept suggests that there are nine key boundaries that, if crossed, could lead to irreversible and abrupt environmental changes.
Here is a step-by-step explanation of the concept:
1. The planetary boundaries concept was introduced by a group of scientists led by Johan Rockström in 2009. It gained recognition and popularity as a framework for understanding the limits of human activities on Earth.
2. The concept identifies nine bio-physical boundaries that are crucial for maintaining the stability of Earth's systems. These boundaries include climate change, biodiversity loss, land use change, freshwater use, ocean acidification, ozone depletion, atmospheric aerosol loading, chemical pollution, and nitrogen and phosphorus cycles.
3. Each boundary represents a critical threshold beyond which human activities can have severe and irreversible impacts on the environment.
4. The concept suggests that by staying within the safe operating space of these boundaries, we can avoid crossing tipping points and maintain a stable and resilient planet.
5. However, it is important to note that the planetary boundaries concept is a framework for understanding and guiding decision-making, rather than a strict set of rules or limits. It provides valuable insights into the interconnectedness of Earth's systems and the potential consequences of exceeding these boundaries.
In conclusion, the planetary boundaries concept is a recent scientific framework that identifies nine bio-physical limits for Earth's systems. By understanding and respecting these boundaries, we can work towards sustainable practices and minimize the risks of irreversible environmental changes.
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A plant fertilized by another plant is called __________. *
Answers
Answer:
pollination
Explanation:
it involves the transfer of a fertilized plant to another
Answer:
pollination
Explanation:
plants can't really do much without bees keep in mind
A radio wave has a frequency of 5.5 × 104 hertz and travels at a speed of 3.0 × 108 meters/second. What is its wavelength?
Answers
Answer:5.45X10^3m
Explanation:So use the formula,v= fλ
3X10^8=5.5X10^4λ what Im saying is divide both and u should get 5454.54m but do sig figs to get answer
Answer:
5.45X10^3m
Explanation:
An owl has a mass of 4.00 kg. It dives to catch a mouse, losing 800.00 J of its GPE. What was the starting height of the owl, in meters?
Answers
Answer:
height =20m
Explanation:
gpe=mgh
800=4×10×x
40x=800
x=20
The inertia of an object is related to its: a.mass and speed.b.mass and force.c.mass only.d.speed only
Answers
Given :
The inertia of an object is related to its: a. Mass and speed, b. Mass and force, c. Mass only, d. Speed only.
Solution :
Inertia is the tendency of an object to continue its current state i.e. motion and rest.
Now, inertia only depends on mass of the object.
If mass of object is too huge. It is hard to to change its current state in comparison to object of small mass.
Therefore, correct object is c. Mass only.
sample of sic has an average thermal expansion of 6300 ppm between 0oc and 1400oc. what is the average coefficient of thermal expansion of this sample?
Answers
4.5×10^-6 is the average coefficient of thermal expansion of this sample.
6300 pp means, if l=10^6
then Δl=630
Δl=∝lΔt
6300=∝×10^6×1400
∝=4.5×10^-6
The phenomena known as thermal expansion can be seen in solids, liquids, and gases. In this procedure, the application of heat causes an object or body to expand (temperature).
The rate of change in length per degree of temperature change is known as the coefficient of linear expansion. Every material has a linear expansion coefficient as an inherent quality. As a result, it differs depending on the substance. The cohesive force between the atoms determines how quickly a material expands .A cohesive force is what holds two or more atoms together.
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Select the correct answer.
Anna will wear a black dress when she attends her cousin's wedding. Which color(s) does the dress absorb?
O A.
all colors
B.
no colors
Ос.
red and green
OD. white
Answers
Answer:
B
Explanation:
B
Wave power is free, sustainable, renewable, and produces zero waste. Therefore, it can contribute to reducing our carbon footprint. The Pelamis Wave Energy Converter was a technology that used the motion of ocean surface waves to create electricity. Wave power is produced by the ___________ motion of floating devices placed on the surface of the ocean.
a) deep
b) circular
c) up and down
d) side to side
Answers
what is the process of changing energy from one to another called
Answers
Answer:
Energy transformation, also known as energy conversion, is the process of changing energy from one form to another.
a ball is shot at an angle of 45 degrees into the air with initial velocity of 45 ft/sec. assuming no air resistance, how high does it go? how far away does it land? hint: the acceleration due to gravity is 32 ft per second squared.
Answers
Answer:
Explanation: GIVEN :
∅ = 45°
INITIAL VELOCITY (V·) = 45 FT/SEC
ACC DUE TO GRAVITY = 32 FT/SEC²
REQUIRED :
MAXIMUM HEIGHT (HMAX) = ? OR how high does it go 2.MAXIMUM RANGE (RMAX) = ? OR how far away does it land?BY APPLYING FORMULA OF MAXIMUM HEIGHT OF PROJECTILE
HMAX = V·²SIN²∅/2G
HMAX = 45²SIN45²/2X32
HMAX = 1012.5/64
HMAX = 15.82FT
FOR MAX RANGE
BY APPLYING FORMULA OF MAX RANGE
R = V·²SIN2∅/G
R = 45²SIN2X45/32
R = 2025 X 1/32
R = 63.28FT
when you change altitude, or go deep underwater, the change in air pressure may cause tension and discomfort in this membrane. is called?
Answers
When you change altitude, or go deep underwater, the change in air pressure may cause tension and discomfort in the eardrum membrane.
What is the eardrum membrane?The eardrum membrane, also known as the tympanic membrane, is a thin, translucent, and circular layer of tissue. It is situated in the ear canal, and it divides the outer and middle ear. The eardrum vibrates in response to sound waves, causing the auditory ossicles in the middle ear to move.
The eardrum is composed of three layers of tissue. The outer layer is made up of skin cells, the middle layer is made up of fibrous tissue, and the inner layer is made up of mucus-secreting cells. The eardrum is one of the body's most sensitive organs because it is so thin, measuring only 0.1 millimeters thick. Because of its susceptibility to pressure, it can be easily harmed by changes in air pressure caused by loud noises, diving, or flying in an airplane.
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what happens to the electron flow within a conductor if the emf or voltage source is removed?
Answers
If the voltage source or EMF is removed from a conductor, the electron flow within the conductor will eventually stop.
This is because the voltage source creates an electric field that causes the free electrons in the conductor to move, creating an electric current. When the voltage source is removed, the electric field disappears, and the free electrons in the conductor will no longer have a driving force to move them. As a result, the electrons will begin to lose energy and eventually come to a stop, leading to the cessation of the electric current.
It's worth noting that the time it takes for the electron flow to stop depends on various factors such as the resistance of the conductor, the capacitance of the circuit, and the amount of charge stored in any capacitors present in the circuit.
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Baker Bill used 67 kilograms of flour on Monday. He used 48 kilograms of flour on Tuesday. How much did he use in all?
Answers
The total amount of flour he used in all is 115kg
What is Addition?One of the four fundamental operations in mathematics is addition, along with subtraction, multiplication, and division. When two whole numbers are added, the sum or total of those values is obtained.
Given that Baker Bill used 67 kilograms of flour on Monday. He used 48 kilograms of flour on Tuesday
We would add the kg of flour he used
This would be 67 + 48 = 115kg of flour
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PLEASE HELP!! What needs to happen for solid water to change to liquid water?
A. Energy needs to be removed.
B. Atoms need to break apart.
C. A chemical reaction needs to happen.
D. Intermolecular forces need to be overcome.
I took this once already and A was NOT correct.
Answers
Answer:
The answer is D.
Explanation:
I took the test.
When solid water changes to liquid water Intermolecular forces need to be overcome. The correct answer is D.
What is phase change?The process of changing a substance from one state of matter to another is called a phase change. The phase change from solid to liquid is called melting or fusion. In order for solid water (ice) to change to liquid water, the intermolecular forces holding the water molecules in a fixed position in the ice lattice need to be overcome.
Here in the Question,
Option A: Energy needs to be removed. This is true for the opposite process, where liquid water changes to solid ice. In this case, heat energy is removed from the water, causing the molecules to lose kinetic energy and slow down, eventually forming a solid lattice. But in the case of solid ice changing to liquid water, energy needs to be added, not removed, to break the intermolecular forces holding the solid together.
Option B: Atoms need to break apart. This is not true for the phase change from solid to liquid. In a phase change, the atoms or molecules in the substance do not break apart or change in any way. Instead, the intermolecular forces between the atoms or molecules are either weakened or strengthened to allow for the phase change.
Option C: A chemical reaction needs to happen. This is also not true for the phase change from solid to liquid. In a chemical reaction, the atoms or molecules in the substance are rearranged to form new substances with different properties. But in a phase change, the atoms or molecules remain the same and only the arrangement and motion of the particles change.
Option D: Intermolecular forces need to be overcome. This is the correct option. The intermolecular forces, such as hydrogen bonds, holding the water molecules in a fixed position in the ice lattice need to be overcome to allow the molecules to move freely and form a liquid. This requires the addition of energy, usually in the form of heat, to the solid ice.
Therefore, The correct answer is D. Intermolecular forces need to be overcome.
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HELPPP PLEASE I GIVE BRAINLIST
handles on kitchen stove pots are usually made of wood mainly because of ?
A ) Conduction
B ) Convection
C ) Radiation
D ) Condensation
Answers
Answer:
(B) Conduction
Explanation:
Answer:
a ) conduction
Explanation:
it's a because if u think about it a conductor keeps the heat from getting to a certain part of the metal
As wavelength decreases, frequency and energy _________________;
a) increase b) decreases c) remain the same
Answers
Answer:
Increase
Explanation:
The best way for me to visualize the relation between wavelength, frequency, and energy is to think about actual ocean waves. Wavelength is a measure of the distance between two equivalent points on consecutive waves (think wave peak to wave peak). Lets say you are building a sand castle and want to see how many waves hit your castle over a period of 10 seconds. If the distance between each wave is 10 ft and the wave is traveling at 1 foot per second then you will only have one wave hit your castle. If the wavelength is 1/2 that (5 ft) then you will have 2 waves hit your castle in the same amount of time. This is the same concept behind waves in physics. The smaller the distance between each wave, the more waves and therefore more energy that will be delivered.