Explanation:
Plastics with a density less than or equal to 1.025 g/mL will float in seawater, while plastics with a density greater than 1.025 g/mL will sink.
Here are some examples of plastic densities:
Polyethylene terephthalate (PET) has a density of approximately 1.38 g/mL, so it will sink in seawater.
Polypropylene (PP) has a density of approximately 0.9 g/mL, so it will float in seawater.
High-density polyethylene (HDPE) has a density of approximately 0.95 g/mL, so it will float in seawater.
Polystyrene (PS) has a density of approximately 1.05 g/mL, so it will sink in seawater.
Based on the above examples, we can see that plastics such as polypropylene and high-density polyethylene will definitely float in seawater, while others such as polyethylene terephthalate and polystyrene will definitely sink. Other types of plastics with densities close to 1.025 g/mL may float or sink depending on their exact density and the conditions of the water, such as temperature and salinity.
pls help Patton launches a water balloon at a speed of 15.8 meters per second in the positive x-direction at an angle of 19.5 above horizontal. What are the components of the velocity vector right before the balloon strikes the ground?
To solve this problem, we need to use trigonometry to break the initial velocity vector into its x and y components.
What is Velocity?
Velocity is a vector quantity that describes the rate at which an object changes its position. It is defined as the displacement of an object per unit time in a particular direction.
In other words, velocity is the speed of an object in a given direction. It is a vector quantity because it has both magnitude (the speed) and direction.
The initial velocity vector can be represented as follows:
v = 15.8 m/s [19.5° above horizontal]
The x-component (vx) of the velocity vector can be found using the cosine function:
cos(19.5°) = vx / 15.8 m/s
vx = 15.8 m/s cos(19.5°) = 14.9 m/s
The y-component (vy) of the velocity vector can be found using the sine function:
sin(19.5°) = vy / 15.8 m/s
vy = 15.8 m/s sin(19.5°) = 5.25 m/s
When the water balloon strikes the ground, its y-velocity component will be zero because it will have reached the ground level. Therefore, the components of the velocity vector right before the balloon strikes the ground are:
vx = 14.9 m/s [to the right]
vy = 5.25 m/s [upward]
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what is the mass, Fnet and Fapp?
Mass is a measure of an object's inertia, or resistance to changes in its motion. It is measured in kilograms (kg).
What is Mass?Mass is a physical property of an object that measures the amount of matter it contains. It is measured in kilograms (kg) or in grams (g). Mass is different from weight, which is the measure of the force of gravity on an object. Mass is the same everywhere in the universe and is unaffected by gravity, while weight depends on gravity and can vary from place to place. Mass is an important concept in physics, as it is used to calculate energy, momentum, and other physical properties of an object.
Fnet (net force) is the sum of all the forces acting on an object. It is measured in Newtons (N).
Fapp (applied force) is the force that is applied to an object in order to change its motion. It is also measured in Newtons (N).
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Select all the correct location on the image .
Which items matter
Just the phone and battery should be where they should be on the photographs.
What is the definition of a matter?The term "matter" refers to a substance that is composed of several kinds of particles, occupies space, and has inertia. The numerous kinds of particles each have a unique mass and size, according to the fundamentals of current physics. The electron, proton, and neutron are three of the most well-known instances of material particles.
Which best encapsulates matter?All objects with mass and volume are considered to be matter (takes up space). It is usually pretty easy to show that the everyday items we interact with have mass and occupy space.
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1 point
A swimmer can swim at a speed of 2.2 m/s for 372 seconds. What distance will she cover in that time?
Answer with zero decimal places. (round up to nearest whole number)
The swimmer will cover a distance of 818.4 meters in 372 seconds, swimming at speed of 2.2 m/s.
What is speed?The magnitude of change of its position over time or the magnitude of change of its position per unit of time is called speed.
We use this formula: distance = speed x time
speed is the swimmer's speed, and time is the time she swims for.
Substituting the given values, we get: distance = 2.2 m/s x 372 s
Calculating the product, we obtain:
distance = 818.4 meters
Therefore, the swimmer will cover a distance of 818.4 meters in 372 seconds, swimming at a speed of 2.2 m/s.
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help me with this quickly please
The amount of heat energy gained by the sample of copper is 15600 J
How do I determine the heat energy gained?First, we shall carefully list out the given parameters from the table in the question above. This is given below:
Mass of copper (M) = 2.0 KgSpecific heat capacity of copper (C) = 390 J/KgK Initial temperature of copper (T₁) = 253 KFinal temperature of copper (T₂) = 273 KTemperature change (ΔT) = 273 – 253 = 20 KHeat gained (Q) =?The heat gained by the sample of copper cab be obtained as follow:
Q = MCΔT
Q = 2 × 390 × 20
Q = 15600 J
Thus, from the above calculation, we can conclude that the heat gained is 15600 J (none of the options are correct)
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If I do 100 Joules of work to lift my backpack, then half of everything falls out so that I can lift it using half the force, how much work will I do to lift it the same distance?
50J work will do to lift it the same distance
How much energy is wasted during a fall?
When an object is falling freely, its velocity rises because of the acceleration caused by gravity. In the instance of a body that is falling freely, the kinetic energy thus rises while the potential energy falls as the height of the object decreases.
When an object is descending at its terminal velocity, the force of gravity and air resistance are equal, and the object no longer accelerates. The amount of labor done is equal to the sum of the object's displacement and the gravitational force. The modification of the object's potential energy brought on by gravity can also be used to calculate it.
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Explain how a smoke detector works and how the ions create an electric current in the detection chamber.
Answer:
well,,,,, it detecs smok and the smoke its a trigger
Explanation:
Two bar magnets are held in place in the configuration shown. If the magnets are pulled apart, which statement correctly describes the changes that will take place in the energy of the system?
Potential energy decreases because movement is in the opposite direction of the magnetic field. This is because when magnets are pulled apart, the magnetic field between them is weakened, thus decreasing the potential energy of the system.
What is magnetic field?A magnetic field is a force field that is created by an electric charge or current. It is a vector field, meaning it has both magnitude and direction. Magnetic fields are generated by electric currents such as those used in electromagnets, and by magnetic materials such as iron. The Earth also generates a magnetic field. Magnetic fields have many uses, including navigation, electric motors, and magnetic storage devices. They are also useful in medical diagnostics and treatments. In addition, they can be used to study the composition of stars and galaxies.
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Mike recently purchased an optical telescope. Identify the part of the electromagnetic spectrum that is closest to the frequency that Mike can observe
with the help of his new tool.
gamma ray
x-ray
ultraviolet
infrared
microwave
radio
Gamma rays and radio waves both fall under the electromagnetic spectrum. Presented is a picture that shows the complete spectrum. But the optical telescope can only see the visible spectrum. As a result, it is limited to frequencies between [tex]400[/tex] and [tex]700 nm[/tex].
What is the role of electromagnetic spectrum?It is safe to infer that Mike will be observing the visible region of the electromagnetic spectrum, since he recently bought an optical telescope.
The capacity of a thing to attract other objects to it; connected with or produced by the magnetic force. Physics. The study of the relationship between magnetism and electricity is referred to as electromagnetism.
The colours of the rainbow that the human eye can see, from violet to red, are included in this region of the electromagnetic spectrum.
Therefore, the closest frequency Mike can see with his new device is in the visible light spectrum, which lies between ultraviolet and infrared on the electromagnetic spectrum.
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Which advantage of stored digital data could also be a disadvantage?
A. Stored digital data are reliable.
B. Systems have been developed to protect stored digital data.
OC. Information in stored digital data can be quickly changed.
D. Stored digital data can be copied perfectly time after time.
The advantage of stored digital data that could also be a disadvantage is:
C. Information in stored digital data can be quickly changed.
What is Digital Data?
Digital data is any information that is stored or transmitted in digital form, usually as a series of binary digits (bits). This includes text, images, audio, video, and other types of data that can be represented using a series of 0s and 1s. Digital data is often created and processed using computers and other digital devices, and can be stored and transmitted using various types of digital storage media and communication channels.
While the ability to quickly change information in stored digital data can be advantageous for updating or correcting errors, it can also be a disadvantage if the information is changed inappropriately or maliciously. This can lead to inaccurate or false information being disseminated, potentially causing harm or confusion. Additionally, the ability to quickly change information can make it difficult to verify the accuracy or authenticity of the data. Therefore, while the ability to quickly change information in stored digital data can be beneficial, it is important to use caution and employ proper security measures to ensure the accuracy and integrity of the data.
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The __weight_________ of the glass of water on the table is its force.
Answer: inertia
Explanation:
he glass of water has inertia — it will not move unless a big enough force acts on it. The force in this activity pulling on the glass of water is the friction between the tablecloth and the glass.
How does the creation of a new mountain range in an ecosystem affect an animal population that becomes divided into two groups by the mountains?
A.
The two new animal populations adapt gradually and separately to their new environments on either side of the mountain.
B.
The two new animal populations are not greatly affected by the separation, and they adapt in the same manner.
C.
The new animal populations gradually migrate up either side of the mountain until they are together again.
D.
The new animal population on one side of the mountain is driven to extinction.
A. The two new animal populations adapt gradually and separately to their new environments on either side of the mountain. This options explains how does the creation of a new mountain range in an ecosystem affect an animal population.
Explain the role of mountain range in an ecosystem?
When a new mountain range is created, it can act as a barrier that separates animal populations on either side. Over time, the two populations will adapt to their new environments, which may be different due to differences in climate, vegetation, or other factors.
As a result, the two populations may evolve independently of each other, leading to differences in behavior, appearance, and genetic makeup. This process is known as allopatric speciation. It is important to note that while the two populations may become distinct, they may still be able to interbreed if they come into contact again in the future.
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What is the rate law for the reaction a → b if the rate constant, k, is 0. 25 m⁻¹ s⁻¹ at 75 °c?
If the rate constant, k, for the reaction A + B is 0.25 M-1 s-1 at 75 °C, Which of the following claims is true in light of the rate law, rate = k[A]2[B] The rate law for a reaction is Rate = (1.25 M2s1)[A][B]2.
rate=k[A]m[B]n[C]p…
In which k is the rate constant, which is unique to a certain reaction at a specific temperature, and [A], [B], and [C] indicate the molar concentrations of reactants. M, N, and P are typically positive integer exponents (although it is possible for them to be fractions or negative numbers).
The rate of a reaction must be tracked experimentally when the reactant concentrations are varied in order to calculate the rate constant k and the exponents m, n, and p. The rate constant k varies with temperature and surface area but is independent of the concentration of A, B, or C.
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For a reaction, a → b, the rate law for the reaction is (0.25) [A] with the rate constant,k is 0.25 m⁻¹ s⁻¹.
What is rate law?The rate of the reaction defines the reactant concentration. It gives the relation between reactant and product. It gives the concentration of the reactant involved in the reaction.
The rate law is directly proportional to the rate constant of the reaction. The rate constant (k) gives the relation between the molar concentration of the reactant and the rate of the reaction.
The rate law is defined as, R= k [A]ᵃ[B]ᵇ, where R represents the rate law, k represents the rate constant, and [A], [B] represents the concentration of the reactant. a,b represents the order of reaction with respect to A and B.
From the given,
The rate law,
R= k [A]
= 0.25 [A]
Thus, the rate law of the reaction is 0.25[A].
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why does the magnetic field allow some of the solar energy but not all?
Explain the relationship between the load on the spring and the length of the spring when the load is increased from 0 to 10N
(I really need an answer plsss)
Since Hooke's law implies linear, i anticipate that the length of a spring will double if the weight hanging on this is doubled. The graph below depicts a spring's ideal Hooke's law graph.
Simple definition of Hooke's law.At the range of the material's elastic limit, according to Hooke's law, the strain is inversely related to the applied stress. The molecules and atoms in elastic materials stretch when they are stretched, distort when under stress, and then return to their original shape once the tension is released.
What other names are given to Hooke's law?In the year 1660, an English british scientist Robert Hooke discovered Hooke's law, commonly known as that of the law of elasticity. According to Hooke's law, the magnitude of the deformation is precisely proportional to a deforming load or force.
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What difference do you notice between air and water and air and glass
The main differences between air and water and air and glass are their density, viscosity, compressibility, refractive index, and transparency.
Air and water fluctuate in density, viscosity, and compressibility. Air is lots much less dense than water and has a decreased viscosity, which means that it flows greater without difficulty.
Air is also a lot more compressible than water, which means that it may be compressed to a miles smaller volume than water. On the subject of air and glass, there are numerous variations as properly. Glass is stable, whilst air is gasoline.
Glass is also an awful lot denser than air and has a higher refractive index, which means that it bends mild more than air does. This is why lenses manufactured from a glass are frequently used in cameras and telescopes for consciousness mild.
Any other essential distinction between air and glass is their transparency. Air is completely obvious to see light, while glass can both be transparent or opaque depending on its composition and any impurities it may comprise.
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pls help Demarius is at the bottom of a hill. The hill has an upward slope of 13.5above horizontal. When Demarius has walked 955 meters along this slope, how much elevation has he gained?
a.255 m
b.955 m
c.929 m
d.223 m
Demarius has gained an elevation of 233 m. Option D.
Elevation calculationTo solve this problem, we can use trigonometry. Let's call the elevation Demarius has gained "h". Then, we can use the following trigonometric relationship:
tan θ = h / d
where θ is the angle of the slope (13.5°), and d is the distance Demarius has walked along the slope (955 m).
Rearranging this equation to solve for h, we get:
h = d * tan θ
Substituting the values we know, we get:
h = 955 m * tan 13.5°
h ≈ 223 m
Therefore, Demarius has gained approximately 223 meters in elevation.
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Between mercury, venus, earth and mars which has the smallest orbit
Answer:
Mercury has the shortest orbit
Explanation:
Its right
a narrow capillary of radius 2cm placed in a liquid was observed to rise to a height of 12cm for water and 5cm for mercury. calculate the coefficient of surface tension for water and mercury of density 1000kg/m^3 and 13,000kg/m^3 use g=9.81 m/s^2
The coefficient of surface tension of water is 29400 N/m and the coefficient of surface tension for the mercury in the capillary tube is 159412.5 N/m.
What is surface tension ?The surface tension of a liquid is the force on its surface caused by the particle - particle attraction in the surface layer by the bulk of the liquid which results in the minimization of surface area.
The equation connecting the coefficient of surface tension with radius of capillary, height and density is given as :
γ = ρ g h/2r
For water ,
ρ = 1000 kg/m³
h = 12 cm = 0.12 m
r = 2 cm = 0.02 m.
then γ = 1000 kg/m³ × 9.8 m/s² × 0.12 m/ (2 × 0.02 m)
= 29400 N/m.
For mercury,
ρ = 13000 kg/m³
h = 5 cm = 0.05m
r = 2 cm = 0.02 m.
then γ = 13000 kg/m³ × 9.8 m/s² × 0.05 m/ (2 × 0.02 m)
= 159412.5 N/m.
Therefore, the coefficient of surface tension of water is 29400 N/m and the coefficient of surface tension for the mercury in the capillary tube is 159412.5 N/m.
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PLEASE HELP!!!! A single-celled, microscopic organism, Paramecium caudatum (P. caudatum), was grown in a container with food and freshwater. The growth rate of the P. aurelia population is shown in the graph.
5c78ed99-a73d-456f-987a-379358e65942.jpeg
a. Use the information and graph to describe the relationship among time, food, and the P. Aurelia population.
b. Predict how the P. aurelia population would most likely change if another microscopic organism, Paramecium caudatum (P. caudatum), is added on day 17 to the same container with no additional food or freshwater. Assume that P. caudatum is not a predator of P. aurelia and that both species use the same food. Provide reasoning for your prediction.
name five example of derived qualities
Answer: 1. Intelligence
2. Creativity
3. Leadership
4. Empathy
5. Resilience
Explanation: NOW READ ONE PIECE MY SON
the impulse experienced by a car is 4000 kg•m/s. What is the change in it's momentum?
The car's momentum change is 4000 kg/m/s because momentum change equals impulse.
Elaborating:Impulse can be summed up as follows: In this case, the car experienced an impulse of 4000 kg/s. Impulse = force x time.
The following formula can be used to determine the car's change in momentum using this information: The car's momentum change is 4000 kg/m/s because momentum change equals impulse.
How does momentum relate to impulse?The change in an object's momentum caused by a force acting on it for a certain amount of time is equal to impulse. An object's momentum change is measured by its impulse, which is defined as the sum of the object's acting force and time. Calculating impulse can be done by: Force x time is the impulse.
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descibe the movement of the particles at the boiling point of a substance, what is happening with temperature and energy
019 (part 1 of 3) 10.0 points
An open vertical tube has water in it. A
tuning fork vibrates over its mouth. As the
water level is lowered in the tube, the sixth
resonance is heard when the water level is
30.25 cm below the top of the tube.
What is the wavelength of the sound wave?
The speed of sound in air is 343 m/s.
Answer in units of cm.
020 (part 2 of 3) 10.0 points
What is the frequency of the sound wave; i.e.,
the tuning fork?
Answer in units of s−1
.
021 (part 3 of 3) 10.0 points
The water continues to leak out the bottom
of the tube.
When the tube next resonates with the tuning fork, what is the length of the air column?
Answer in units of cm.
1) The wavelength of the sound wave is 11cm.
2) The frequency of the sound wave is 3118.18.
3) The length of the air column is 35.75cm.
What is frequency and its unit?
The quantity of full oscillations made by any wave element in a unit of time is known as the frequency of a sinusoidal wave. A parameter that describes the rate of oscillation and vibration is called frequency. Hertz is the SI unit for frequency. One full oscillation per second corresponds to one hertz (Hz).
Therefore, The wavelength of the sound wave is 11cm, The frequency of the sound wave is 3118.18 and The length of the air column is 35.75c
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what is the speed in mph if an object is travelling at 750 m/s?
Answer: The speed of the object in mph is 1680.89 mph
Answer:
1680.89 mph is the speed of an object
A 7cm thick wedge and 15 cm long wedge is used to pierce a 2m long log of diameter 20 cm. What is velocity ratio of the wedge?
The velocity ratio of the wedge is 0.05. This means that the effort must be moved a distance of 20 times the distance moved by the load to split the log.
How to calculate the velocity ratio of the wedge?
To calculate the velocity ratio of the wedge, we first need to understand the mechanical advantage of the wedge.
The mechanical advantage of a wedge is calculated as the ratio of the length of the sloping side of the wedge to its thickness. In this case, the length of the sloping side is the length of the wedge, which is 15 cm, and the thickness is 7 cm. So, the mechanical advantage of the wedge is:
Mechanical advantage = Length of sloping side / Thickness
= 15 cm / 7 cm
= 2.14
This means that the wedge can multiply the force applied to it by a factor of 2.14.
Now, let's calculate the velocity ratio of the wedge. The velocity ratio is the ratio of the distance moved by the effort to the distance moved by the load. In this case, the effort is the force applied to the wedge, and the load is the log.
Since the wedge is being used to pierce the log, we can assume that the force applied to the wedge is equal to the force required to cut the log. The force required to cut a log depends on several factors, including the species of wood, the moisture content of the wood, and the sharpness of the wedge. Without more information, we cannot calculate the force required to cut the log.
However, we can calculate the distance moved by the effort and the distance moved by the load. When the wedge is struck with a hammer or mallet, it moves a short distance into the log. Let's assume that the wedge moves 1 cm into the log before the log splits. The distance moved by the load is equal to the diameter of the log, which is 20 cm.
Therefore, the velocity ratio of the wedge is:
Velocity ratio = Distance moved by effort
/ Distance moved by load
= 1 cm / 20 cm
= 0.05
So, the velocity ratio of the wedge is 0.05. This means that the effort must be moved a distance of 20 times the distance moved by the load to split the log.
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If a sample of gas occupies 13L of volume at a temperature of 75 K what will be its new temperature if it is expanded to 26 L at constant pressure.
Answer:
150 K
Explanation:
You can use Charles’s Law to solve this problem. Charles’s Law states that the volume of a gas is directly proportional to its temperature in kelvins when pressure is held constant.
Let V1 and T1 be the initial volume and temperature of the gas, and let V2 and T2 be the final volume and temperature of the gas. According to Charles’s Law, we have:
V1 / T1 = V2 / T2
Substituting in the given values for V1 (13 L), V2 (26 L), and T1 (75 K), we get:
13 / 75 = 26 / T2
Solving for T2, we get:
T2 = (26 * 75) / 13
So, T2 = 150 K.
The new temperature of the gas will be 150 K.
How much current would be traveling perpendicular to a 2.90 T magnetic field when a force of 57.80 N is present in an 90.70 meter wire?
A magnetic field is a vector field that explains the magnetic effect on moving charges, currents, and magnetic materials.
What is called magnetic field?The magnetic field is the area around a magnetic material or a moving electric charge where the power of magnetism works. A diagram of the magnetic field that depicts how a magnetic force is spread within and around a magnetic substance.
The region encircling a magnetic dipole or a moving charge generates a magnetic field. The SI measure of field strength for magnetic fields is Tesla (T). The magnetic field is the region around a magnet where one can feel the magnetic pull.
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A household uses the following electric appliances:
refrigerator of rating 400W for 10 hours each day.
two electric fans of rating 80 W for 6 hours daily.
Six electric tubes of rating 18 W for 6 hours daily.
Calculate the electricity bill for the household for month of June if cost of electricity energy is ₹ 3.00 per unit
The electric bill for the household for the month of June is ₹ 504.72
How do I deterrmine the electric bill for the month of june?We'll begin by obtaining the energy consumed. This is shown below:
For fridge:
Power = 400 WTime = 10 hoursEnergy for fridge =?Energy = power × time
Energy for fridge = 400 × 10
Energy for fridge = 4000 Wh
Divide by 1000 to express in KWh
Energy for fridge = 4000 / 1000
Energy for fridge = 4 kWh
For fan:
Power = 80 WTime = 6 hoursEnergy for fan =?Energy = power × time
Energy for fan = 80 × 6
Energy for fan = 480 Wh
Divide by 1000 to express in KWh
Energy for fan = 480 / 1000
Energy for fan = 0.48 kWh
Energy for 2 fans = 2 × 0.48 = 0.96 kWh
For tube:
Power = 18 WTime = 6 hoursEnergy for tube =?Energy = power × time
Energy for tube = 18 × 6
Energy for tube = 108 Wh
Divide by 1000 to express in KWh
Energy for tube = 108 / 1000
Energy for tube = 0.108 kWh
Energy for 6 tubes = 6 × 0.108 = 0.648 kWh
Total energy consumed per day = 4 + 0.96 + 0.648 = 5.608 kWh
Total energy consumed per month = 30 × 5.608 = 168.24 kWh
Finally, we shall determine the electric bill for the month of june. Details below:
Cost per KWh = ₹ 3.00Total energy (E) = 168.24 KWhElectric bill for June =?Electric bill = energy × Cost per KWh
Electric bill for June= 168.24 × 3
Electric bill for June = ₹ 504.72
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Dotermine how much elastic potential energy a spring has stored in it it the
spring constant is 50 M/m and the spring is stretched a distance of 2 m
Answer:
The elastic potential energy (U) stored in a spring is given by the formula:
U = (1/2)kx²
where k is the spring constant and x is the displacement from the equilibrium position.
In this case, k = 50 M/m (assuming M/m represents the unit of the spring constant) and x = 2 m. Substituting these values into the formula, we get:
U = (1/2)(50 M/m)(2 m)²
= (1/2)(50 M/m)(4 m²)
= 100 M
Therefore, the spring has 100 M (units of energy) of elastic potential energy stored in it when it is stretched a distance of 2 m.
Explanation:
