3-i) an unknown mass of m kg attached to the end of an unknown spring of k n/m has a natural frequency of 45 hz. when an additional 0.47 kg mass is added to m, the natural frequency is lowered to 41 hz. determine the unknown mass m (in kg) and the spring constant k (in n/m).

Answer:

When boiling water, the temperature of molecules within the water increases    

Explanation: and they slowly begin to move at a rapid rate, upwards. ... The hot water molecules become less dense, and they rise above the denser cooler molecules. This movement of molecules creates convection currents.

Answer:

Particles in solids are always vibrating (moving back and forth) in place. The vibrational motion of particles in solids is kinetic energy. Heat makes the particles in a solid vibrate faster, giving them more kinetic energy. Faster-vibrating particles bump into one another more often and hit each other harder.

Explanation:

Answer: Newton's second law of motion is F = ma, or force is equal to mass times acceleration.

Explanation: hope this helps!

Based on the given information, the temperature at your station in Houston is likely to decrease in the next 2 hours due to the constant temperature advection and is estimated to be 63.04ºF (16.8ºC).

Given the wind speed of 10 m/s from the west-northwest, we can use the concept of wind advection to adjust the temperature gradient based on the speed and direction of the wind.

First, we need to convert the wind speed from meters per second to kilometers per hour, as the temperature gradient is typically expressed in degrees per kilometer.

10 m/s is equivalent to 36 kilometers per hour (10 m/s * 3.6 km/h).

Next, we can adjust the temperature gradient based on the wind speed. The temperature change due to advection is typically estimated using a rule of thumb, which suggests that for each 10 kilometers per hour of wind speed, the temperature change is approximately 1 degree Celsius (or 1.8 degrees Fahrenheit) over a distance of 100 kilometers.

In this case, with a wind speed of 36 kilometers per hour, the adjusted temperature change due to advection would be approximately 3.6 degrees Celsius (or 6.48 degrees Fahrenheit) over a distance of 100 kilometers.

Now, let's calculate the temperature change at your station in Houston after 2 hours using the adjusted temperature gradient.

Temperature change = Adjusted temperature gradient × Distance × Time

Temperature change = 3.6°C/200 km * 200 km * 2 hours

Calculating the result, the temperature at your station in Houston is estimated to decrease by 7.2 degrees Celsius (or 12.96 degrees Fahrenheit) after 2 hours.

To find the final temperature at your station, subtract this temperature change from the initial temperature of 76ºF (24ºC):

Final temperature = Initial temperature - Temperature change

Final temperature = 76ºF (24ºC) - 12.96ºF (7.2ºC)

The estimated final temperature at your station in Houston after 2 hours is approximately 63.04ºF (16.8ºC).

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Answer:

light potential energy is converted into electrical potential energy.

Explanation:

A solar heat absorbs the light that creates pairs of electron - holes, these free charges when moving create a current, the light energy stored in the radiation is converted into electrical energy within the n-p junctions.

In summary, light potential energy is converted into electrical potential energy.

Answer:

a force that acts on a body moving in a circular path and is directed toward the center around which the body is moving.

Explanation:

Answer:

A net force that acts on an object to keep it moving along a circular path

External force and here centripetal force

If the truck exerts a force f on the sedan then Force f will exert on the truck.

According to newtons third law ,"every action have an equal and opposite

reaction".

If truck exerts a Force \(F_{ts}\) on sedan then sedan will exert a force \(F_{st}\) on truck and \(F_{ts}\) = - \(F_{st}\)

so, we can say that vehicle experiences a force of same magnitude.

given the truck exerts force on the sedan, so the sedan also exerts Force F on the truck.

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Answer:

If a child is holding a ball with a diameter of 4.20 cm and average density of 0.0839 g/cm³ underwater then the force required to hold the ball completely submerged will be 0.043 N.

Explanation:

When an object is submerged in a fluid, it experiences an upward force known as the buoyant force. This force is equal to the weight of the fluid displaced by the object and acts in the opposite direction to gravity. If the object is less dense than the fluid, it will float, whereas if it is denser, it will sink.

In this scenario, a child is holding a ball with a diameter of 4.20 cm and an average density of 0.0839 g/cm³ under water. To determine the force needed to hold it completely submerged, we can use the equation:

Buoyant force = weight of fluid displaced = density of fluid x volume of displaced fluid x gravitational acceleration

Since the ball is completely submerged, it displaces a volume of fluid equal to its own volume. The volume of a sphere is given by the formula:

Volume = (4/3) x π x (diameter/2)³

Substituting the given values, we get:

Volume = (4/3) x π x (4.20/2)³ = 4.378 x 10⁻⁵ m³

The fluid in which the ball is submerged has a density of water, which is approximately 1000 kg/m³. Thus, we can calculate the weight of fluid displaced by the ball:

Weight of fluid displaced = density of fluid x volume of displaced fluid x gravitational acceleration

= 1000 kg/m³ x 4.378 x 10⁻⁵ m³ x 9.81 m/s²

= 0.043 N

Therefore, the buoyant force acting on the ball is 0.043 N, which is the force needed to hold the ball completely submerged.

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The force needed to hold the ball completely submerged is 0.0273 N. This is equal to the buoyant force acting on the ball, which is the weight of the water displaced by the ball.

What is Density?

Density is a physical property of matter that measures how much mass is contained in a given volume of a substance. It is typically represented by the symbol "ρ" (rho) and has units of mass per unit volume, such as grams per cubic centimeter (g/cm³) or kilograms per cubic meter (kg/m³).

the ball is not moving up or down, the force of gravity pulling the ball down must be balanced by an equal and opposite force acting upwards. This force is the force needed to hold the ball completely submerged, and is given by:

Fsubmerged = Fbuoyant = 0.377 N

However, we need to take into account the fact that the ball has its own weight. The weight of the ball can be calculated using its mass and the acceleration due to gravity:

Fweight = mball × g = density × volume × g = 0.0839 g/cm^3 × 38.48 cm^3 × 9.81 m/s^2 = 0.0327 N

Therefore, the net force needed to hold the ball completely submerged is:

Fsubmerged = Fbuoyant - Fweight = 0.377 N - 0.0327 N = 0.344 N

However, we need to convert this to newtons since the SI unit of force is newtons, so we get:

Fsubmerged = 0.344 N

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The result of acceleration of an object is momentum. The steel ball's change in momentum is greater compared to that of the ceramic ball.

Almost all motion-related activities have momentum. It is a fundamental idea in physics. The term "momentum" is frequently used in sports. Like, if a group has momentum, it is moving and will require some work to stop.

We measure mass in motion by its momentum. Any thing in motion has momentum. Physics dictates that an object's momentum is equal to its mass times its velocity. Both the mass and the velocity of the parameters have an impact on momentum.

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The following is an example of adaptive radiation: The evolution of different species of Hawaiian honeycreepers. The correct option is d.

Adaptive radiation is the rapid divergence of a single ancestral lineages into different species that inhabit a variety of ecological niches or habitats. It often happens in response to new opportunities for living or evolving in a changing environment.

The Hawaiian archipelago's different islands provided a variety of ecological niches that the Hawaiian honeycreepers evolved into various species, each adapting to its specific niche. This example represents adaptive radiation because different species of Hawaiian honeycreepers evolved from a single ancestral lineage.

Thus, the correct option is d.

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Answer:

2nd one

Explanation:

highest frequency shortest wavelength

Answer:

highest frequency shortest wavelength

Answer:

V = sqrt(2gh)

V = sqrt(2 * 9.8 * 10)

V = sqrt (196)

V = 14 m/s

Answer:

V = sqrt(2gh)

V= sqrt(29.8 10)

V = sqrt (196)

V=14 m/s

A key contribution of Hermann von Helmholtz to the study of neuron function was measuring the conduction speed through nerves of the action potential.

Helmholtz created a technique known as the "method of the nerve impulse" to gauge the rate of nerve conduction. He performed tests in which he stimulated a nerve at one end and timed the passage of an action potential to the other end of the nerve.

Helmholtz determined the speed of the nerve impulse by meticulously measuring these time gaps. His research and observations shed important new light on how signals move through the neurological system.

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The wavelength of the radio broadcast is 2.93 meters. The photon energy of the radio broadcast is 6.79 x  \(10^{26}\) joules.

The wavelength of the radio broadcast can be calculated using the formula:

wavelength = speed of light / frequency

The speed of light in a vacuum is approximately 3.00 x \(10^8\) meters per second. We need to convert the frequency from megahertz (MHz) to hertz (Hz):

102.3 MHz = 102.3 x \(10^6\) Hz

Plugging in the values, we get:

wavelength = (3.00 x \(10^8\)m/s) / (102.3 x \(10^6\) Hz)

wavelength = 2.93 meters

Therefore, the wavelength of the radio broadcast is 2.93 meters.

b. The photon energy of the radio broadcast can be calculated using the formula:

energy = Planck's constant x frequency

Planck's constant is approximately 6.63 x \(10^{34}\) joule-seconds. Again, we need to convert the frequency from megahertz to hertz:

102.3 MHz = 102.3 x \(10^6\) Hz

Plugging in the values, we get:

energy = (6.63 x \(10^{34}\) J·s) x (102.3 x \(10^6\) Hz)

energy = 6.79 x \(10^{26}\) joules

Therefore, the photon energy of the radio broadcast is 6.79 x \(10^{26}\)joules.

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Answer:

lubricant (decrease friction).

control production speed.

use only when required.

realtion between applied force.and pressure is more force exerts more pressure whereas less force exerts less pressure

confused in another one

Answer:

See below

Explanation:

1) Applied Force and Pressure

Pressure = Force / Area

This shows that Applied force and pressure are in direct relationship. This means that If the Applied force is more, the Pressure is also More and vice versa.

2) Surface Area of Contact and Pressure

Pressure = Force / Surface Area of Contact

This shows that Pressure and Surface area of contact are inversely related. This means that if pressure is increased on an object, the surface area of contact decreases and vice versa.

Answer:

Explanation:

Hooke's Law is a linear representation that, in equation form, looks like this:

F = -kΔx where F is force, k is the spring constant, and Δx is the displacement of the spring when a Force is applied to it in the form of a mass hanging on the end of it. We need to use the equation to solve for the spring constant, k. Doing this by filling in the values we were given:

4 = -k(-12) the 12 is negative because the mass hangs below the point of equilibrium. This gives us that

k = 1/3. Now we'll use that in the next equation where we need to solve for displacement:

6 = -1/3(Δx) and

Δx = -18 cm

Answer:

newton's first law of motion

Explanation:

this is because newton's first law of motion states that every object will continue in its state of rest or uniform motion in a straight line unless a resultant force acts on it so...

isn't this similar to the law of inertia?

yes it is

hope this helps

Answer:

A positive charge placed in an electric field will tend to move in the direction of the electric field lines and a negative charge will tend to move opposite to the direction of the electric field lines.

One way to remember this is that there is one velocity, and so the thumb represents it. There are many field lines, and so the fingers represent them. The force is in the direction you would push with your palm. The force on a negative charge is in exactly the opposite direction to that on a positive charge.

Explanation:

Answer:

The force of the negative particle direction is East.

The minimum force needed to horizontally push a 50.0 kg object up a friction-less incline of 30∘ with constant speed is 245 N.

Explanation: A force, F is needed to push the block up the incline at constant speed. This is given by the force balance in the horizontal and vertical directions. Thus, taking the incline angle as θ = 30º, the force balance equations can be written as: Horizontal direction:

F = mgsinθ

= 50 x 9.8 x sin 30º

= 245 N

Vertical direction:

N = mgcosθ

= 50 x 9.8 x cos 30º

= 424.5 N

The force needed to push the block is the horizontal force F.

Therefore, the minimum force required to push the block up a frictionless incline of 30∘ with constant speed is 245 N.

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Saturn's Roche limit played the most important role in the ring's formation. This is because the Roche limit is the distance from a planet at which tidal forces would break apart a celestial body held together only by its own gravity. As Saturn orbited the Sun, it reached a point where the gravitational forces on its moons and other orbiting objects were so strong that they were torn apart and formed the rings.So option B is correct.

The Roche limit of Saturn refers to the critical distance from the planet where the tidal forces exerted by Saturn's gravity are stronger than the self-gravity holding a celestial object together. Inside the Roche limit, the tidal forces would exceed the object's gravitational forces, resulting in its disintegration. Beyond the Roche limit, gravitational forces prevail, allowing the formation of stable objects like moons.

The rings of Saturn are thought to have originated from the debris of moons or moon lets that either collided or were disrupted by Saturn's tidal forces within the Roche limit. These interactions, occurring over a significant period, caused the moon lets to break apart into countless tiny particles, thus forming the extensive ring system encircling Saturn.

While factors like Saturn's differential rotation, distance from the Sun, debris from volcanoes on Mimes, and tidal resonance with Titan may have some impact on the ring system, the primary and most influential factor in the formation of Saturn's rings is Saturn's Roche limit .Therefore, option B is correct.

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The fabrication process improves the yield from 0.92 to 0.95. The defects per area unit for 0.92 and 0.95 technology are 0.042 per cm² and 0.026 per cm² respectively

The yield is increased by a manufacturing procedure from 0.92 to 0.95 the defects will be;

Given Data

Suppose the area of the die is 2 cm²

The defects per unit area with a yield of 0.92 and 0.95 must be determined

Solution

Equation for yield

Yield = 1/(1+(defects × die area/2)²

The yield equation has been rearranged

Defects = 2×(1√(yield)-1)/die area

First, we find for the technology of 0.92

Defects = 2×(1√(yield)-1)/die area

Putting the value of yield and die are 0.92 and 2 cm² respectively

Defects =2× (1√(0.92-1)/2

Defects = 0.042 per cm²

Now, find for the technology of 0.95

Putting the value of yield and die which are 0.95 and 2 cm² respectively

Defects=2× (1√(0.95-1)/2

Defects=0.026 per cm²

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Using the information depicted on the distance - time graph, the slope of the graph is could be used to infer the velocity of each cyclist. Hence, cyclist A and B do not have the same velocity at 3 seconds.

The steepness of slope on the distance - time graph gives the velocity of the cyclist. At time, t = 0 ; the cyclist A has a greater slope than cyclist B. Hence, the velocity of the cyclists is different.

Therefore, the cyclists do not have the same velocity at time, t = 3 seconds.

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The mass of an object broken into parts can be determined by finding the mass of the parts, and then add those masses together.

To total mass of an object broken into parts can be determined by adding the mass of different parts together.

\(M_t = m_1 + m_2 +\ ---\)

where;

Thus, we can conclude that the mass of an object broken into parts can be determined by finding the mass of the parts, and then add those masses together.

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The phase of the moon when the moon is on the opposite side of the earth from the sun is the full moon. This happens when the sun, earth, and moon are aligned, with the earth in the middle.

The full moon appears when the sun’s light reflects off the entire surface of the moon, making it appear completely illuminated from our perspective on earth.Therefore, option A is the correct answer: The full moon.

When the moon is on the opposite side of the Earth from the sun, it is in the full moon phase. During this phase, the sun illuminates the entire side of the moon facing the Earth, making it appear fully lit and round. This occurs because the sun, Earth, and moon are aligned in a straight line, with the Earth in the middle. The full moon phase is characterized by a bright, round shape and is often considered the most visually striking lunar phase. It occurs approximately once every 29.5 days as the moon orbits around the Earth.

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Answer:

Avg. Velocity = 10 m/s

Acceleration =  2 m/s^2

Distance = 100 m

Explanation:

First, we need to convert the velocity of the car from km/h to m/s, since the standard unit of velocity in SI units is meters per second.

72 km/h = 20 m/s (to 2 significant figures)

We can now calculate the average velocity of the car using the formula:

average velocity = total distance ÷ total time

Since the car starts from rest, its initial velocity is 0 m/s. Therefore, the total distance it travels during the 10 seconds is:

distance = (1/2) × acceleration × time²

where acceleration is the constant acceleration of the car during the 10 seconds, which we do not know yet.

To find the acceleration, we can use the formula:

final velocity = initial velocity + acceleration × time

The final velocity of the car is 20 m/s (which we calculated earlier), the initial velocity is 0 m/s, and the time is 10 seconds. Therefore:

20 m/s = 0 m/s + acceleration × 10 s

Solving for acceleration:

acceleration = 2 m/s²

Substituting this value of acceleration into the formula for distance, we get:

distance = (1/2) × 2 m/s² × (10 s)² = 100 meters

Therefore, the average velocity of the car during the 10 seconds is:

average velocity = total distance ÷ total time = 100 meters ÷ 10 seconds = 10 m/s

The acceleration of the car during the 10 seconds is 2 m/s², and the distance travelled by the car during this period is 100 meters.