Describe the causes/mechanisms for creep failure & give materials design approaches to prevent it.

Humans radiate excess energy in the form of infrared radiation. The radiation emitted in the highest amount has a wavelength of 9.50 micrometers. This wavelength is associated with a frequency of 3.16 x 10^13 Hz.

How is frequency related to wavelength and energy? Frequency is inversely proportional to wavelength, according to the equation c = λν, where c is the speed of light, λ is the wavelength, and ν is the frequency. As a result, if the wavelength of a wave increases, the frequency decreases, and if the wavelength decreases, the frequency increases. In general, the energy of a wave is proportional to its frequency. This suggests that if the frequency of a wave is higher, its energy will be higher, and if its frequency is lower, its energy will be lower.

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When an object is released with an initial velocity upward, the direction of its acceleration is typically downward.

This is because the force of gravity, which acts on the object, pulls it in the opposite direction to its motion. According to Newton's second law of motion, the net force on an object is equal to its mass multiplied by its acceleration. In this case, the force of gravity acts as the net force, causing the object to accelerate downward.

The acceleration due to gravity is approximately 9.8 meters per second squared on Earth, and it acts downward towards the center of the planet. Therefore, when the object is released with an initial velocity upward, the gravitational force causes it to decelerate and eventually change direction, resulting in a downward acceleration. This downward acceleration opposes the initial upward velocity of the object until it eventually reaches its peak and starts to fall back down under the influence of gravity.

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Answer:

0.0025H

Explanation:

I didn't come here to be part of this all I wanted is just information for my research

When the capacitor is fully charged, the potential difference across the capacitor is equal to the voltage source.

Capacitor is a device which stores charges. Charges come from the current passing through it.

The charges stored in a capacitor is called capacitance.

Its unit is farad (F)

No current flows in the circuit when a capacitor is fully charged because the potential difference across the capacitor is equal to the voltage source.

Here, the charging current will be zero such that capacitor voltage equal to source voltage.

When the capacitor is fully charged, the potential difference across the capacitor is equal to the voltage source.

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Answer:

Initial velocity (u) = 40 m/s

Distance travel in last 5 seconds = 100 m

Explanation:

Given:

Acceleration (a) = 8 m/s²

Final velocity (v) = 0 m/s

Find;

1] Initial velocity before 5 sec

2] Distance travel in last 5 seconds

Computation:

1] Initial velocity before 5 sec

v = u + at

0 = u + (-8)(5)

u - 40 = 0

Initial velocity (u) = 40 m/s

2] Distance travel in last 5 seconds

s = ut + (1/2)(a)(t²)

s = (40)(5) + (1/2)(-8)(5²)

s = 200 - 100

Distance travel in last 5 seconds = 100 m

The role of friction is of great importance when creating safety ramps and escalators because with the help of friction things move.

It is important to move objects slowly on ramps and escalator because the ramps and escalator moves object in the opposite direction of gravity. If we did not move objects slowly, then the objects or a person get damaged.

So we can conclude that the role of friction is of great importance when creating safety ramps and escalators because with the help of friction things move.

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Match the volcano type with its correct

1. Cinder Cone:

Plate Tectonic Setting: Mostly Spreading Ridges, some Mantle Plumes

2. Composite/Stratovolcano:

Plate Tectonic Setting: Subduction Zones (Convergent Margins)

3. Shield Volcano:

Plate Tectonic Setting: Mostly Mantle Plumes, some Spreading Ridges

4. Large Igneous Provinces (LIPs):

Plate Tectonic Setting: Various tectonic settings

Volcano types can be associated with specific plate tectonic settings and magma compositions. Let's match the volcano types with their correct plate tectonic settings and magma compositions:

1. Cinder Cone:

Plate Tectonic Setting: Mostly Spreading Ridges, some Mantle Plumes

Magma Composition: Mafic

Cinder cones are typically small, steep-sided volcanoes that form from the eruption of basaltic magma. They are commonly found in volcanic regions associated with spreading ridges, where tectonic plates are moving apart, or in areas influenced by mantle plumes, such as hotspot volcanism.

2. Composite/Stratovolcano:

Plate Tectonic Setting: Subduction Zones (Convergent Margins)

Magma Composition: Intermediate, varies from felsic to mafic

Composite or stratovolcanoes are characterized by their steep slopes and alternating layers of lava flows and pyroclastic materials. They are commonly found in subduction zones, where an oceanic plate is being subducted beneath  continental plate. The magma composition of these volcanoes varies, ranging from felsic (high silica content) to mafic (lower silica content).

3. Shield Volcano:

Plate Tectonic Setting: Mostly Mantle Plumes, some Spreading Ridges

Magma Composition: Mafic

Shield volcanoes are large, broad, and gently sloping volcanoes that form from the eruption of basaltic magma. They are often associated with mantle plumes, such as those found in hotspot regions, as well as in volcanic areas influenced by spreading ridges.

4. Large Igneous Provinces (LIPs):

Plate Tectonic Setting: Various tectonic settings

Magma Composition: Mafic

Large Igneous Provinces (LIPs) are extensive regions of volcanic and intrusive rock formations that are associated with massive outpourings of mafic magma. They can occur in various tectonic settings, including continental rifts, hotspot regions, and flood basalt provinces.

5. Seafloor Volcanism, Pillow Lava:

Plate Tectonic Setting: Mostly Spreading Ridges

Magma Composition: Mafic

Seafloor volcanism is primarily associated with spreading ridges, where magma wells up and creates new oceanic crust. The lava erupted underwater cools rapidly, forming pillow-shaped structures known as pillow lavas. The magma composition is typically mafic, dominated by basaltic lavas.

These associations between volcano types, plate tectonic settings, and magma compositions provide insights into the geological processes and Earth's dynamics that shape the Earth's surface.

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A more fundamental way to measure the rotation of Jupiter is to measure the changes in the planet's radio waves, which are controlled by its magnetic field.

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Answer:

Approximately \(1.5\; {\rm s}\).

(Assumptions: \(g = 9.81\; {\rm m\cdot s^{-2}}\); air resistance on the volleyball is negligible.)

Explanation:

Under the assumptions, acceleration of the volleyball would be \(a = (-g) = (-9.81)\; {\rm m\cdot s^{-2}}\) during the entire flight. (This value is negative since the ball is accelerating downwards- toward the ground.)

By the time the volleyball hits the ground, the volleyball would be at a position \(2.0\; {\rm m}\) below where it was launched. In other words, the (vertical) displacement of the volleyball during the entire flight would be \(x = (-2.0)\; {\rm m}\). (Negative since the ball is below where it was launched.)

Apply the SUVAT equation \((v^{2} - u^{2}) = 2\, a\, x\) to find the velocity of the volleyball right before hitting the ground. In this equation:

Rearrange this equation and solve for the velocity right before landing, \(v\). Note that because \(v\!\) is raised to the power of \(2\) in \((v^{2} - u^{2}) = 2\, a\, x\), both \(v = \sqrt{u^{2} + 2\, a\, x}\) and \(v = -\sqrt{u^{2} + 2\, a\, x}\) could satisfy this equation. However, \(v\!\!\) needs to be negative since the volleyball would be travelling downwards before reaching the ground.

Therefore, right before reaching the ground, velocity of the volleyball would be:

\(\begin{aligned} v &= -\sqrt{u^{2} + 2\, a\, x \\ &= -\sqrt{(6.0)^{2} + 2\, (-9.81)\, (-2.0)} \; {\rm m\cdot s^{-1}} \\ &\approx (-8.67)\; {\rm m\cdot s^{-1}}\end{aligned}\).

In other words, velocity of this volleyball has changed from \(u = 6.0\; {\rm m\cdot s^{-1}}\) (upwards) to \(v \approx (-8.67)\; {\rm m\cdot s^{-1}}\) (downwards) during this flight. Divide the change in the velocity \((v - u)\) by the rate of change in velocity \(a = (-9.81)\; {\rm m \cdot s^{-2}}\) to find the duration of this flight:

\(\begin{aligned}t &= \frac{v - u}{a} \\ &\approx \frac{(-8.67) - 6.0}{(-9.81)}\; {\rm s} \\ &\approx 1.5\; {\rm s}\end{aligned}\).

Answer:

R + 6 ohms

Explanation:

The current is the same in all three resistors

i = 2 amps

The problem is that the total voltage is unknown.

R = r

R1 =3 ohms

R2 = 3 ohms

The voltage drop is E = I*R

I = 2 amps

R1 = 3 ohms

R1 = 3 ohms

E = 3*2 = 6 volts

The second 3 ohm resistor also has 6 volts across it.

The total is 12 volts so far. But we know nothing more on how to solve for R.

All you can say is that the total resistance = R + 6 ohms

Answer:

私は知らない

Explanation:

Salt, or NaCl, is an example of an ionic compound. Ionic compounds are formed when a metal combines with a non-metal through the transfer of electrons.

Crystalline compounds are compounds that have a well-defined, ordered, and repeating three-dimensional arrangement of atoms, ions, or molecules in a solid state. In a crystalline compound, the constituent particles are arranged in a highly ordered and repeating pattern called a crystal lattice.

In the case of NaCl, the sodium (Na) donates an electron to the chlorine (Cl), forming an ionic bond between them and resulting in the formation of an ionic compound. Ionic compounds typically have high melting and boiling points, are crystalline in structure, and conduct electricity when dissolved in water.

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Answer:

7.5x10-^8m

Explanation:

the formulae is v=fh ,where f is frequency

h is wavelength

hence wavelength=v/f

since the speed of light is 3x10^8

then the wavelength =3 x 10^8/4 x 10^15

=7.5x10^-8m

A solar system object of rocky composition and comparable in size to a small city is most likely an asteroid. Asteroids are small, rocky objects that orbit the Sun and are remnants from the formation of the solar system. They can vary in size, with some being only a few meters in diameter while others can be hundreds of kilometers across.

Asteroids can be found in the asteroid belt between Mars and Jupiter, but they can also be found in other regions of the solar system. They are classified based on their composition, with some being made up of silicate rock, while others are composed of metals like iron and nickel.

The study of asteroids is important because they can provide valuable insights into the formation and evolution of the solar system. Some asteroids may also pose a threat to Earth if they were to collide with our planet, which is why scientists are studying ways to potentially deflect or destroy them in the future.

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Answer:

Control Variable

Explanation:

A control variable is a variable that is held constant throughout the cause of an experiment, in order to test accurately the relationship between the dependent and the independent variables. The control variable, which is amount of water needed by the plants in this case, has the property of affecting the growth of the daisies, hence if it is not held constant, the result of the experiment might not be accurately attributed to the light source alone.

Therefore, to say with certainty that the difference seen in both categories of plants was from the difference in lighting alone, other variables (amount of water, type of soil, temperature etc.) has to be held constant

Answer:

D

Explanation:

There are no exceptions to these laws under specific stated conditions..

The laws of science are statements that describe or predict a range of phenomena as they appear in nature. Laws explain facts determined by experiment. Laws do not have absolute certainty and be changed by future experiments and observations.

Answer:

there are no exceptions to these laws under specific stated conditions.

Explanation:

There are no exceptions to scientific laws under certain stated conditions. This is the main factor that distinguishes scientific theories from scientific laws.

Both scientific theories and laws are based on extensive observations, experimentation, and reasoning, but scientific theories are subject to change over time as new technology is invented and new evidence emerges.

The sailplane which is going from Earth to Mars is accelerating at 0.033 m/s² in the direction of solar radiation force.

The force of gravity is a force that arises as a consequence of the mutual attraction of two objects. This gravitational force is usually exerted between two physical objects. Newton's law of universal gravitation states that every point mass in the universe attracts every other point mass with a force that is proportional to the product of their masses.

Acceleration is the rate at which an object changes its speed or direction. Acceleration is a vector quantity that can be positive or negative. If the acceleration is negative, the object slows down. If the acceleration is positive, the object speeds up.

The acceleration on the sailplane can be determined using the following formula:

\(F_{net} = ma\)

Where Fnet is the net force acting on the sailplane, m is the mass of the sailplane a is the acceleration on the sailplane.\(F_{net} = ma\)

The net force acting on the sailplane can be calculated as:

\(F_{net} = F_{rad} - F_{gravitySun} - F_{gravityEarth}\)

Where \(F_{rad}\) is the solar radiation force, \(F_{gravitySun}\) is the gravitational force due to the sun, and \(F_{gravityEarth}\) is the gravitational force due to Earth.

Putting the given values in the above formula:

\(F_{net} = 7.70 \times 10^2 N - 173 N - 1.00 \times 10^2 N = 497 N\)

The acceleration on the sailplane is given as:

\(a = F_{net} / ma = (497\  N) / 14,900 \ kg = 0.033 \ m/s^2\)

The magnitude of the acceleration on the sailplane is 0.033 m/s² (rounded to three significant figures).

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Answer:

d. 0.48

Explanation:

The story that describes the graph is, we  were accelerating from our starting point A to the next point B, then from point B started decelerating to our next point C, rested between point C and D, and finally we started our journey again by accelerating to point E.

A displacement time graph, is a type of graph that is used to describe the motion of an object with respect of how the object is changing its position with time.

The change in position with change in the time of motion of the object gives velocity of the object which is also equal to the slope of the graph.

v = Δx / Δt

where;

From the given graph we can conclude the following based on the motion;

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The answer is d) 20 m.

The depth of pond is 20 m if it seems to be 10 m.

The formula relating real depth and app. depth :

\(\boxed {A = \frac{R}{n}}}\)

In this case, refractive index has to be an whole number for real depth to give a whole number for app. depth.

To determine the power required to drive the heat pump, we can use the concept of the Coefficient of Performance (COP). The COP of a heat pump is defined as the ratio of the heat delivered to the heat absorbed from the outside environment.

In this case, the heat delivered is the heat lost by the house to the outside air, which is 10 kW.

The COP of a heat pump can be expressed as COP = Q_delivered / W_input, where Q_delivered is the heat delivered and W_input is the power input to the heat pump.

Since the COP is not provided, we cannot directly calculate the power required to drive the heat pump. However, typical values of COP for heat pumps range from 2 to 4. Let's assume a COP of 3 for this case.

Using the COP formula, we have COP = Q_delivered / W_input. Rearranging the equation, we can solve for W_input: W_input = Q_delivered / COP.

Substituting the values, W_input = 10 kW / 3 = 3.33 kW.

Therefore, the power required to drive the heat pump is approximately 3.33 kW.

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Answer:

Take the following steps

putting on gloves before treating the cut

using disinfectant on the cut

calmly telling the lab instructor

washing hands after treating the cut scalpel safety rules scalpel

use in lab how to use a scalpel safely how to use a scalpel correctly handling sharp objects sharp instrument safety sharp object safety rules safe handling and disposal of sharps policy

Report inappropriate predictions

False. Many of the brightest stars we see in the night sky are actually several million to billions of years old.

These stars have gone through various stages of stellar evolution, including their formation, main sequence phase, and possibly later stages such as red giant or supernova. The brightest stars we see often belong to different spectral types and luminosity classes, indicating their varying stages of evolution. Young stars, such as protostars and T Tauri stars, may appear bright during their early formation phases, but they are not typically among the brightest stars visible to us without the aid of telescopes.

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Deposition is when a gaseous state changes to solid state by escaping liquid state. So I think it is 3. Liquid glass cools and hardens

Answer:

Astronomers estimate the age of the universe in two ways: 1) by looking for the oldest stars; and 2) by measuring the rate of expansion of the universe and extrapolating back to the Big Bang; just as crime detectives can trace the origin of a bullet from the holes in a wall.

Explanation:

The first situation that the bird is giving force to its wings to fly , it is related to the first law. The second one the coffee cup stay on rest until any force acts on it is related to the first law.

Newton's first law of motion states, every objects tends to stay in its current  state until an external force acts on it. The second law states that, the force is the product of mass and acceleration. Thus, greater is the mass greater force is needed to accelerate an object.

Third law of motion states that, for every action there is an equal and opposite reaction.

The sailor when pushing the boat, the boat is exerting a force in turn and the man can slide to the land and boat moves away. This is third law of motion.

As the force by the wind increases, its acceleration increases . This is second law. The team with greater mass in tug of war game will  have greater force that is just the second law.

The skater board tends to move again even after the hitting, its is first law of Newton.

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Answer:

When a negative charge is brought near one end of a conductor electrons are repelled. ... When electric voltage is applied, an electric field within the metal triggers the movement of the electrons, making them shift from one end to another end of the conductor. Electrons will move toward the positive side.

A defibrillator is a medical device used to deliver an electric shock to the heart in order to restore normal heart rhythm during a life-threatening condition called cardiac arrest. The power delivered by a defibrillator is typically expressed in terms of energy rather than power.

The defibrillator delivers a high-energy electric shock, measured in joules (J), to the body. The energy delivered during defibrillation is used to depolarize the heart muscles and allow the natural pacemaker of the heart to resume control over the heart rhythm.

The energy delivered by a defibrillator can vary depending on the specific device and the protocol being followed. Typically, the initial shock delivered by a defibrillator ranges from 120 to 200 joules. However, subsequent shocks may require higher energy levels.

It's important to note that the power of the defibrillator is determined by the rate at which energy is delivered. Power is the rate of energy transfer, measured in watts (W). The power delivered by a defibrillator is typically very high for a very short duration, allowing for the rapid delivery of the required energy to the heart.

Overall, while the defibrillator delivers a high-energy electric shock measured in joules, the power of the device depends on the rate at which the energy is delivered, and it is typically very high for a very short duration.

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Answer:

60N

Explanation:

Given parameters:

Combined mass = 50kg

Acceleration  = 1.2m/s²

Unknown:

Force to propel  = ?

Solution:

From Newton's second law of motion, we know that;

       Force  = mass x acceleration

 So;

         Force  = 50 x 1.2  = 60N

Answer:

60N

Explanation:

Here are the answers to the questions:1. Three main orbital changes that the earth undergoes and their time periods are:A. Precession- every 26,000 years B. Obliquity- every 41,000 years C. Eccentricity- every 100,000 yearsThese changes in the earth's orbit, together, have an impact on the amount of solar radiation that reaches the Earth's surface, which then affects climate change. Three cyclical orbital changes and their times associated with Milankovitch are:A. Eccentricity - every 100,000 yearsB. Obliquity - every 41,000 yearsC. Precession - every 26,000 years2. All EMR in order of wavelength are:- Gamma rays- X-rays- Ultraviolet radiation- Visible light- Infrared radiation- Microwave- Radio wavesForms of EMR from the sun that are reaching right now are UV radiation, visible light, and infrared radiation.

The number of forms of EMR reaching the moon right now is two, UV radiation, and visible light.The ozone layer is present in the stratosphere and is formed through a series of complex chemical reactions. The primary function of the ozone layer is to protect the earth from the harmful effects of UV radiation by absorbing it. The balance of EMR plays a critical role in the greenhouse effect. As the amount of greenhouse gases increases, the amount of energy that is absorbed by the Earth's surface also increases. Carbon dioxide and other greenhouse gases can absorb and emit infrared radiation, which plays a crucial role in climate change.3. The four forms of heat transfer to and on planet earth are:- Conduction- Convection- Radiation- AdvectionThese four forms of heat transfer are responsible for weather on planet Earth.

For example, when the sun heats the ground, it results in conduction, which then results in convection as the air heats up and rises. This can lead to cloud formation and precipitation.4. The time it takes for EMR from the University of Delaware to reach:A. Moon - About 1.28 secondsB. Jupiter - About 33.75 minutesC. Closest star (not the sun) - About 4.37 yearsD. Your mother - This question is not clear, please provide more context.

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