Answer:Assuming the mass of the spring is not changed, the frequency of the mass-spring system will increase if the length of the spring is cut into one third. This is because the frequency of a mass-spring system is inversely proportional to the square root of the length of the spring. Mathematically, the frequency (f) is given by:
f = 1 / (2π) x √(k/m)
where k is the spring constant and m is the mass of the system. Since the mass of the spring is not changing, if the length of the spring is cut into one third, the square root of the length will become √(1/3) = 0.577. Therefore, the frequency of the system will increase by a factor of 1/0.577, which is approximately 1.73 or √3.
Explanation:
Please answer
Which object wouldleast likely be used in an investigation of the relationship between magnetism and electric charge
Generator
Simple motor
Electromagnet
Simple machine
Barbera argues that simple machines like levers and pulleys reduce the amount of work needed
to get things done. Clarice argues that machines don’t decrease work - they decrease force.
Who is right and why?
Answer:
Machines can reduce force but not work.
Work = force * distance
If a machine reduces the force input by a factor of two, say, then the distance traveled by the applied force must be doubled
One cannot get more work out of a machine than the work input to the machine.
Can you list 5 types of precipitation?
Here are 5 types of precipitation: Rain, Snow, Sleet (rain and snow mixture), Hail, Drizzle.
Precipitation is the term used to describe any form of water that falls from the atmosphere to the Earth's surface, including rain, snow, sleet, hail, and drizzle. Precipitation is an important component of the water cycle and is the main source of freshwater for many ecosystems and human communities.
Rain is the most common form of precipitation and is produced when water droplets in clouds become large enough to fall to the ground due to gravity. Snow is a form of precipitation that falls as frozen water crystals. Sleet is a mixture of rain and snow that falls to the ground as frozen precipitation, while hail is formed when snow or rain droplets freeze around a nucleus and grow into small, solid balls of ice. Drizzle is a form of precipitation that consists of tiny water droplets that fall to the ground in a steady, light rain.
The amount and type of precipitation that occurs in a specific location is influenced by various factors, including temperature, atmospheric pressure, wind patterns, and the amount of moisture in the air. Precipitation plays a crucial role in maintaining the Earth's water balance and providing water for various human and ecosystem needs.
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A bullet is accelerated in the muzzle of a gun from rest to 150 m/s in 0.50sec. What is the acceleration?
Answer:
Bullets are cylindrical metal projectiles shot from firearms. Their main function is to kill or otherwise incapacitate. They come in numerous varieties for use in handguns, rifles, and machine guns. There is also special ammunition capable of penetrating armor, firing underwater, or firing "silently" at subsonic speeds. However, their designs are all basically the same. A typical cartridge consists of four components: the cartridge case, primer, propellant charge and bullet. When a gun trigger is pulled, the primer is struck, igniting the propellant. This causes a rapid expansion of gas, which forces the bullet forward and ejects the casing. Contrary to popular belief, guns are not loaded with bullets, but cartridges, and they fire bullets (since bullets are a more common term and the actual objects responsible for harm, they receive the recognition).
While small in size (the most popular handgun bullet is 9 mm in diameter) bullets posses enough kinetic energy to cause serious damage. Using a kinematics formula, it is possible to determine the acceleration of a bullet when the muzzle velocity and barrel length of a gun are known.
v2 = vo2 + 2as
Where
v is the muzzle velocity
vo is the initial velocity of the bullet, which is zero
a is the acceleration
s is the barrel length
Since acceleration is the desired value, the derived formula is this:
equation
When fired from a Beretta 92S, the standard issue US Army pistol, a 9 mm Parabellum bullet has a muzzle velocity of 335 m/s. With its 127 mm barrel length, the bullet's acceleration is calculated to be 4.4 × 105 m/s2.
The acceleration of a bullet depends largely on the gun from which it is fired, along with the intent of the user. Pistol bullets generally feature a lower acceleration than rifles or machine guns. Also, individuals involved with clandestine operations may use firearms with silencers, which suppress bullet speed and require special subsonic ammunition.
Remember, guns don't kill people. Bullets do. To paraphrase Chris Rock in Bigger, Blacker and Uncut, if bullet prices were raised to $5,000 each, there would be a drastic decrease in murders [mp3].
2. Form a hypothesis: Buoyancy is the tendency to float. How do you think the liquid density affects the buoyancy of objects placed in the liquid?
Liquid density affects the buoyance of the object placed in it, since the ability of the object to float depends on the density of the liquid, the denser the liquid the more likely the object will float and vice versa.
Archimedes’ principle states that a body immersed in a fluid experiences an upward force which is equal to the weight of the fluid displaced.
The upward force experienced by an object in a liquid is known as buoyant force.
For Example;
let the density of the object = \(\rho_o\)let the density of the liquid = \(\rho_l\)An object which is denser than the liquid \((\rho_o > \rho_l)\) has a positive apparent weight and can sink in the liquid.
An object which is less dense than the liquid \((\rho_o < \rho_l)\) has a negative apparent weight and rises in the liquid.
When the weight of the object is equal to the upthrust \((\rho_o = \rho_l)\), the apparent weight will be zero and the object will float in the liquid. This is known as principle of floatation.
Thus, we can conclude that liquid density affects the buoyance of the object placed in it, since the ability of the object to float depends on the density of the liquid, the denser the liquid the more likely the object will float and vice versa.
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Answer:
Liquid density affects the buoyance of the object placed in it, since the ability of the object to float depends on the density of the liquid, the denser the liquid the more likely the object will float and vice versa.
Explanation:
A2.31 kg rope is stretched between supports that are 104 m apart, and has a tension on t of 530 N f one end of the mpe sighly tweaked how long wild take the ring 0 0.639 O 66731 O 0.592 2.6.600s
A rope of 2.31 kg is stretched between supports that are 104 m apart and has a tension of 530 N on it. If one end of the rope is slightly tweaked, the long wild take the ring is B. 0.66731
We need to determine how long it will take the resulting wave to travel from one end of the rope to the other. The wave speed formula is given as V = √(T/μ), where V is the wave speed, T is the tension on the rope, and μ is the mass per unit length.
Here, mass per unit length μ is equal to 2.31 kg/104 m = 0.0222 kg/m.
Putting the given values in the formula, we get: V = √(530 N / 0.0222 kg/m)V = √(23874.77) V = 154.41 m/s
To find the time taken by the wave to travel the length of the rope, we need to use the formula t = L/V, where t is the time, L is the length of the rope, and V is the wave speed.
Putting the given values in the formula, we get: t = 104 m/154.41 m/s ≈ 0.673 s.
Therefore, the time taken by the wave to travel the length of the rope is approximately 0.673 seconds.
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what does a high albedo indicate with regard to a planetary object?
A high albedo indicates that a planetary object reflects a significant amount of incoming sunlight back into space.
Albedo is a measure of the reflectivity of a surface. It quantifies the fraction of solar radiation that is reflected by an object compared to the total amount of radiation incident upon it. Albedo is expressed as a value between 0 and 1, where 0 represents a perfectly absorptive (dark) surface that reflects no light, and 1 represents a perfectly reflective (bright) surface that reflects all incident light. When a planetary object, such as a planet or moon, has a high albedo, it means that it reflects a large portion of the sunlight it receives. This indicates that the surface of the object is relatively bright and does not absorb much of the incoming solar radiation. Instead, it reflects a significant amount of light back into space.
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Which dog has the most kinetic energy?
A. A dog of mass 11 kg running with speed 5 m/s
B. A dog of mass 13 kg running with speed 3 m/s
C. A dog of mass 14 kg running with speed 2 m/s
D. A dog of mass 12 kg running with speed 4 m/s
Answer:
I'm pretty sure it'sssss A
El espectro visible en el aire está comprendido entre la longitud de onda 450 nm del color azul, Determina la velocidad de propagación.
Answer:
v = 2,99913 10⁸ m / s
Explanation:
The velocity of propagation of a wave is
v = λ f
in the case of an electromagnetic wave in a vacuum the speed that speed of light
v = c
When the wave reaches a material medium, it is transmitted through a resonant type process, whereby the molecules of the medium vibrate at the same frequency as the wave, as the speed of the wave decreases the only way that they remain the relationship is that the donut length changes in the material medium
λ = λ₀ / n
where n is the index of refraction of the material medium.
Therefore the expression is
v = \(\frac{\lambda_o}{n} f\)
Let's look for the frequency of blue light in a vacuum
f =\(\frac{c }{\lambda_o}\)
f = \(\frac{3 \ 10^8}{450 \ 10^{-9}}\)
f = 6.667 10¹⁴ Hz
the refractive index of air is tabulated
n = 1,00029
let's calculate
v = \(\frac{450 \ 10^{-9} }{1.00029} \ 6.667 \ 10^{14}\)450 10-9 / 1,00029 6,667 1014
v = 2,99913 10⁸ m / s
we can see that the decrease in speed is very small
a girl is running along a straight line with a uniform velocity 1.4 m/s, find her acceleration
Answer:
acceleration is zero....In this case
Explanation:
In uniform velcity acceleration is zero
Find the tension in the two ropes that are holding the 2.9 kg object in place. Rope 1 makes an angle of 51.3° with respect to the vertical. Rope 2 is pulling horizontally.
Answer:
Explanation:
Let the tension in horizontal rope be T₁ and in the other rope be T₂ which is making angle of 51.3⁰
The vertical component of tension T₂ will balance the weight .
= T₂ cos 51.3 = 2.9 x 9.8
T₂ = 2.9 x 9.8 / cos 51.3
= 28.42 / .625
= 45.47 N
The horizontal component of T₂ will balance T₁
T₂ sin 51.3 = T₁
45.47 sin 51.3 = T₁
T₁ = 35.48 N .
True or false. A small amount of mass can produce a large amount of energy
The satement is true.
This comes from the fact that, according to Einstein:
\(E=mc^2\)and since c² is a very large number then, if we find a way to convert all the mass in energy a small amount will produce a large amount of energy.
if at a given time the magnitude of acceleration of a mass is 9 m/s2 when its position is 4 meters from equilibrium, what is the period of oscillation?
The period of oscillation, if at a given time the magnitude of acceleration of a mass is 9 m/s² when its position is 4 meters from equilibrium is 4.188 s
Acceleration can be expressed as,
a ( t ) = - ω² x ( t )
ω² = a ( t ) / - x ( t )
ω² = 9 / - ( - 4 )
ω² = 9 / 4
ω = 3 / 2
ω = 1.5 rad / s
T = 2 π / ω
T = Time period
ω = Angular velocity
T = 2 * 3.14 / 1.5
T = 4.188 s
Therefore, the period of oscillation is 4.188 s
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An electron with an initial speed of u and a proton with an initial speed of 2u move in circles in a uniform magnetic field B. Compare the work done by the magnetic field on each particle a The work on both particles is the same and non-zero b The work on the proton is twice the work on the electron c The work on the electron is twice the work on the proton. d The work on both particles is the same and zoro
The work done by the magnetic field on each particle is the same and is not zero.
What is magnetic field?A magnetic field is a region in space where a magnetic force is present. This force is caused by the motion of electrically charged particles, such as electrons and protons, and is felt as a force that can attract or repel other magnetic objects. Magnetic fields are created by magnets, or by electric currents. The Earth has its own magnetic field, which is produced by the motion of the planet's molten iron core. Magnetic fields can be used to create energy, power motors, and generate electricity.
This is because the work done by the magnetic force on a charged particle is equal to the product of the charge of the particle, the magnetic field strength and the angle through which the charge moves in the magnetic field. Since both particles have the same charge (1.6 x 10^-19 C) and the same angle, the work done on them is the same.
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What causes earth's magnetic field to flip?
Answer:
The generation of Earth's magnetic field starts at its very center. Some researchers believe polarity reversals are caused by a disturbance in the balance between Earth's rotation and the temperature at the core, which alters the fluid motion of the liquid iron, but the exact process remains a mystery.
a block of mass m is floating in a container of liquid and is partially submerged. the block is then replaced by a block of mass 2m . which of the following describes two forces that are a newton's-third-law force pair whose magnitudes are the same for the two situations? responses
In both situations, the two forces that form a Newton's third-law force pair with equal magnitudes are the buoyant force exerted by the liquid on the block and the weight of the block exerted on the liquid.
When a block is floating in a container of liquid, it experiences two forces: the weight of the block and the buoyant force exerted by the liquid. The weight of the block is given by the equation:
\(\[ F_{\text{{weight}}} = mg \]\)
where m is the mass of the block and g is the acceleration due to gravity. The buoyant force exerted by the liquid on the block is equal to the weight of the liquid displaced by the block. It can be calculated using Archimedes' principle:
\(\[ F_{\text{{buoyant}}} = \rho V_{\text{{submerged}}} g \]\)
where \(\( \rho \)\) is the density of the liquid and \(\( V_{\text{{submerged}}} \)\) is the volume of the block that is submerged in the liquid.
When the block is replaced with a block of mass 2m , the weight of the block doubles while the buoyant force remains the same. Therefore, the two forces that form a Newton's third-law force pair with equal magnitudes in both situations are the buoyant force exerted by the liquid on the block and the weight of the block exerted on the liquid.
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a swimmer can develop a maximum speed of 8m/s when he is swimming in a pool. calculate the time that is required to pass the distance of 15m
Answer:
2
Explanation:
What type of microscopy works by allowing only light waves that have reflected from or refracted though the sample to enter the lens system
Answer:
dark-field microscopy
Explanation:
A darkfield microscope can be regarded as a brightfield microscope with a significant modification to condenser. There is an opaque disk, with a diameter of about 1cm placed in between the illuminator and condenser lens, the disk responsible for the blocking of most of the light from the illuminator, passing through the condenser to objective lens , which will then form hollow cone of light that has its focus on the specimen. Using a darkfield microscope the light that get to the objective is the only refracted or reflected light of structures in the specimen. And the image formed usually display a bright object with a dark background.
It should be noted that darkfield microscope is a type of microscopy works by allowing only light waves that have reflected from or refracted though the sample to enter the lens system.
20 points
A net force of 24 N is applied to an object for 5.0 s. The object is pushed a total of 5.2 m. What is the mass of the object? What equations will be used?
Answer:
S = V0 t + 1/2 a t^2 net distance traveled
5.2 = a/2 * 25
a = 10.4 / 25 = ,416 m / s^2
F = m * a
m = F / a = 24 / .416 = 57.7 N
What do you mean by mechanical advantage of lever is 4. Please help me
Answer:
MA of a simple machine is 4. It means that load overcome is 4 times more than effort used in the machine. This machine can multiply force 4 times the effort used.
Two charged point-like objects are located on the x-axis. The point-like object with charge q1 = 4. 60 µC is located at x1 = 1. 25 cm and the point-like object with charge q2 = −2. 14 µC is located at x2 = −1. 80 cm.
A) Determine the total electric potential (in V) at the origin.
B) Determine the total electric potential (in V) at the point with coordinates (0, 1. 50 cm)
V = kq1/x1 + kq2/x2 is the formula for the total electric potential at the origin, where k is the Coulomb constant.\(V = (8.99x109 Nm2/C2)(4.60x10-6 C)/(0.0125 m) - (8.99x109 Nm2/C2)(2.14x10-6 C)/(-0.0180 m) = 1.28x105 V\) after plugging in the supplied values.
A) We need to compute the electric potential due to each point charge separately and then sum them up to get the overall electric potential at the origin.
The following formula determines the electric potential caused by a point charge q at a distance r from it:
V = kq / r
where k is equal to 9.109 N/m2/C2, the Coulomb constant.
The distance from the point charge q1 to the origin is r1 = 0.0125 m, with x1 = 1.25 cm = 0.0125 m on the x-axis. The electric potential caused by q1 at the origin is thus:
\(V1 = kq1 / r1 = 9.109 Nm2/C2 4.6010-6 C / 0.0125 m = 165.12 V\)
Keep in mind that the displacement absolute value is always taken to be the distance r. the observation point's vector from the point charge.
The distance from the point charge q2 to the origin is r2 = 0.0180 m and it is situated at x2 = -1.80 cm = -0.0180 m on the x-axis. The electric potential caused by q2 at the origin is thus:
\(V2 = kq2 / r2 = (9 10 9 N m 2/ C 2) (-2.14 10 6 C) / 0.0180 m = -226.47 V\)
It should be noted that the negative sign in front of q2 denotes a negative electric potential caused by q2.
The sum of V1 and V2 determines the total electric potential at the origin:
\(165.12 V - 226.47 V = -61.35 V, where Vtotal = V1 + V2\)
Therefore, the total electric potential at the origin is -61.35 V.
B) To calculate the point's overall electric potential (0, 1.50 cm), Each point charge's electric potential must first be independently determined, and then added.
First, let's get the distance between each point charge and the y-axis's (0, 1.50 cm) centre. The distance between the point and q1 is:
r1 = √[(0.0150 m)^2 + (0.0125 m)^2] = 0.0191 m
Q2 is located at a distance from the point of:
r2 = √[(0.0150 m)^2 + (-0.0180 m)^2] = 0.0242 m
The point's electric potential as a result of q1 is:
\(V1 = kq1 / r1 = (9 10 9 N m 2/ C 2) (4.60 10 -6 C) / 0.0191 m = 119.96 V\)
The point's electric potential as a result of q2 is:
\(V2 = kq2 / r2 = (9 10 9 N m 2/ C 2) (-2.14 10 -6 C) / 0.0242 m = -65.47 V\)
The sum of V1 and V2 determines the point's overall electric potential. V2:
V total = V1 + V2, which equals 119.96 V - 65.47 V, or 54.49 V.
Consequently, 54.49 V is the total electric potential at the position (0, 1.50 cm).
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a bodybis thrown vertically upward with velocity of 30m/s calculate the the maximum height attained
Explanation:
Initial velocity(v)=30 m/sFinal velocity(u)=0 m/sAcceleration due to gravity(g)=9.8m/s²Height(h)=?Now,
By the third equation of motion, we have
v²=u²+2gh30²=0²+2×9.8×h900=0+19.6h900=19.6h900/19.6=hh=45.918 mDoes more current flow out of a battery than into it? Does more current flow into a lightbulb than out of it? Explain.
No, the same current flows out of a battery or light bulb as into it.
No, the same current flows out of a battery or light bulb as into it. Since no charge accumulation takes place in these devices, and there is only a single path, the current has to be the same for If you connect a wire only to a single part (pole) of the battery and keep the other end in your hand there will be no flow of electrons, hence no current! By convention, current flows from the positive terminal to the negative. Conventional current flows in an opposite direction to electron flow.
Whenever, one talks about a flow of current, it should always be noted that current is the flow of charges and that results in potential difference (voltage) and not the other way around. Let me get to the exact point.
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Using the picture below, what must take place for the book to move in the direction of the movement arrow?
-A force must be applied to the top of the book to make sure that it is equal to the force of friction.
-The friction of the table must increase and the friction of the book decrease to allow for movement.
-The friction must be removed for any movement to take place.
-A force in the direction of the desired movement must be applied causing the forces to be unbalanced.
For the book to move in the direction of the movement arrow, a force in the direction of the desired movement must be applied causing the forces to be unbalanced.
option D is the correct answer.
What is the Newton's first law of motion?Newton's first law of motion states that an object at rest or uniform motion in a straight line will continue in that path unless it is acted upon by an external force and it will move in the direction of the applied force.
Also, from Newton's second law of motion, which states that the force applied to an object is directly proportional to the product of mass and acceleration of the object.
Mathematically, Newton's second law of motion is written as;
F (net) = ma
F - Ff = ma
where;
F is the applied force on the objectFf is the force of friction opposing the motion of the objectm is the mass of the objecta is the acceleration of the object.Thus, for the book to move, the force of friction must be overcame by the applied force and this create an unbalanced force acting on the book. Also, the book will move in the direction of the net force acting on it.
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Does anyone have a science fair Idea in the topic force and motion? Please I need help!
Answer:
i did this project where i took two marbles pool noodles and tape then i made a ramp and i saw which marble would go down faster the big marble or the little marble hope this helps!!
A substance that has 1500 liters and which has a density of 250 kg / m3 determine the mass of said substance
【Answer】Therefore, the mass in said substance is 375 kilograms.
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This is an exercise on fluids and their fundamental characteristics.
We start to solve, obtaining the data:
DATA:v = 1500 lt = 1.5 m³d = 250kg/m³m = ?Conversion from liters to m³
\(\boldsymbol{1500\not{l}*\dfrac{1 \ m^{3} }{1000\not{l} }=1.5 \ m^{3} }\)
To calculate mass: multiply density by volume.
\(\boldsymbol{m=d*v \ \ \to \ \ \ Formula}\)
We clear our data in the formula:
\(\boldsymbol{m=250\dfrac{kg}{\not{m^{3}}}*1.5\not{m^{3}} }\)
\(\boldsymbol{m=375 \ kg}\)
{ Pisces04 }6. You throw a 0.16 kg baseball to the first baseman. The ball has a kinetic
energy of 105 J. How fast did you throw it? (velocity) *
Answer:
Kinetic energy is the energy possessed by an object due to its motion. You threw the baseball at approximately 36.2 meters per second (m/s).
Explanation:
To calculate the velocity at which you threw the baseball, we can use the equation for kinetic energy:
KE = 1/2 * m * v^2
Where KE is the kinetic energy, m is the mass of the baseball, and v is the velocity.
Given that the mass of the baseball is 0.16 kg and the kinetic energy is 105 J, we can rearrange the equation to solve for v:
105 J = 1/2 * 0.16 kg * v^2
Multiplying both sides by 2 and dividing by the mass:
v^2 = (2 * 105 J) / 0.16 kg
v^2 ≈ 1312.5 m^2/s^2
Taking the square root of both sides:
v ≈ √1312.5 m/s
v ≈ 36.2 m/s
Therefore, you threw the baseball at approximately 36.2 meters per second (m/s).
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which pollutant is most commonly released into waterways by families and individuals?
The most commonly released pollutant into waterways by families and individuals is domestic sewage.
Domestic sewage refers to wastewater that is generated from everyday household activities, such as bathing, washing dishes, and laundry.
This type of pollution primarily consists of organic waste, such as food particles, feces, and soaps, which can contain high levels of nutrients like nitrogen and phosphorus.
When discharged into waterways, these nutrients can contribute to eutrophication, a process that results in the excessive growth of algae and depletion of oxygen levels in the water. This, in turn, can lead to the death of aquatic organisms, loss of biodiversity, and deterioration of water quality.
Moreover, domestic sewage may also contain harmful substances, such as pharmaceuticals, personal care products, and cleaning agents, which can have adverse effects on aquatic ecosystems and human health if not treated properly.
To mitigate the impacts of domestic sewage pollution, families and individuals can take several steps, such as:
1. Properly disposing of waste: Avoid flushing non-degradable items down the toilet and discard fats, oils, and grease in the trash rather than down the sink.
2. Reducing water usage: Practice water conservation measures to decrease the amount of wastewater produced.
3. Using eco-friendly products: Opt for biodegradable and phosphate-free cleaning products and detergents to minimize the environmental impact.
4. Maintaining septic systems: Regularly inspect and pump septic systems to ensure their proper functioning and prevent leaks.
5. Supporting wastewater treatment: Advocate for adequate funding and implementation of wastewater treatment facilities in your community to ensure the proper treatment of domestic sewage before it is discharged into waterways.
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Find the horizontal and vertical components of 75.0 N at 65 degrees
Horizontal component = 75 · cosine(65°) = 31.7 N
Vertical component = 75 · sine(65°) = 68.0 N
For a series circuit, as lights are added, the voltage across each bulb increases/ decreases/ remains the same ?
For a series circuit, as lights are added, the current across each bulb increases/ decreases/ or remains the same ?
For a series circuit, as lights are added, the current across each bulb decreases.