If a negatively charged plastic rod is brought near one end of a neutral copper rod, what happens to that near end?.

According to Wien's law, the color of the sun should be a bright white or slightly bluish-white. This is because Wien's law states that the peak wavelength of the sun's radiation is in the ultraviolet region, which corresponds to a color on the blue end of the visible spectrum.

However, since the sun emits radiation across a broad range of wavelengths, it appears as a bright white ball in the sky to the human eye.

Based on Wien's Law, the Sun's color is primarily white. Wien's Law helps determine the peak wavelength of radiation emitted by a black body, such as the Sun, based on its temperature. The Sun's surface temperature is around 5,500°C (9,932°F), which corresponds to a peak wavelength in the visible light spectrum, causing it to appear white to the human eye.

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Answer:

Earplugs

Explanation:

The objects that absorb the most sound waves are usually soft and flexible or porous. So, the object that satisfies the first two characteristics is Earplugs. It means that the answer is Earplugs.

According to the given statement , the work done to stretch the spring by 0.04 m is 16 joules (J).

To calculate the work done in stretching a spring, you can use the formula:

Work = (1/2) * k * (x²)

where:
- Work is the amount of work done in stretching the spring (in joules)
- k is the force constant of the spring (in newtons per meter, N/m)
- x is the displacement or stretch of the spring from its equilibrium position (in meters)

In this case, the force constant (k) is given as 2.0 × 10⁴ N/m and the displacement (x) is given as 0.04 m.

To find the work done, substitute these values into the formula:

Work = (1/2) * (2.0 × 10⁴ N/m) * (0.04 m)²

First, calculate (0.04 m)² = 0.0016 m²

Work = (1/2) * (2.0 × 10⁴ N/m) * 0.0016 m²

Next, multiply (2.0 × 10⁴ N/m) by 0.0016 m²:

Work = (1/2) * 32 N * m

Finally, calculate (1/2) * 32 N * m:

Work = 16 N * m

Therefore, the work done to stretch the spring by 0.04 m is 16 joules (J).

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According to the given statement it take time to travel 10.0 m is 33 * 10¹³ s.

Speed, expressed in terms of meters per second, is the rate at which an object's location changes. A item moves one meter in one second, for instance, if it starts at the origin and moves three meters in three seconds. The formula for speed is as straightforward as dividing a distance by a time.

Speed is calculated as follows: speed = distance * time. Knowing the units for distance and time is necessary to calculate the units for speed. The units will be in metres per second (m/s) in this example since the distance is measured in metres (m) and the time is measured in seconds (s).

Speed = 3 * 10⁸

Distance = 10.0 m

Time = ?

So Using this formula

Time = Distance ÷ Speed

Time = 10 ÷ 3*10⁸

Time = 33 * 10¹³ s.

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Answer:

iron

Explanation:

Answer:

iron

Explanation:

Which atom is being researched as a possible ingredient of magnetic soap that can help c

An electrically charged object can attract an uncharged object without any contact due to the phenomenon of electrostatic induction. When an electrically charged object is brought close to an uncharged object, it creates an electric field around itself.

The electric field consists of electrically charged particles (electrons and protons) that interact with the atoms in the uncharged object. In the uncharged object, the atoms are electrically neutral, with equal numbers of protons and electrons. However, the electric field from the charged object can cause the electrons in the atoms of the uncharged object to move slightly away from the charged object, creating a separation of charges.

As a result of this separation, the side of the uncharged object closer to the charged object becomes temporarily negatively charged, while the opposite side becomes temporarily positively charged. This redistribution of charges creates an imbalance, and the positively charged side of the uncharged object is attracted to the negatively charged side of the charged object.

Although the charged and uncharged objects do not come into direct contact, the attractive force between them is a result of the electric field and the induced separation of charges. This phenomenon is known as electrostatic induction and is responsible for the attraction between the charged and uncharged objects.

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It is a false statement that; "when charging a secondary cell, energy is stored within a dielectric material using an electric field"

The term secondary cell refers to a cell that can be recharged when it is used up. A typical example of a secondary cell is a lithium ion battery.

We know that most of the secondary cell are charged using a chemical that is inside the battery. As such, it is a false statement that; "when charging a secondary cell, energy is stored within a dielectric material using an electric field"

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The balance of the seesaw would be affected if it were brought to the moon. On Earth, the balance of the seesaw depends on the force of gravity acting on the children and the distribution of their weights. The seesaw is designed in a way that when one child goes up, the other child goes down, maintaining balance.

However, on the moon, the force of gravity is only about 1/6th of what it is on Earth. This means that the children would experience a much weaker gravitational force. As a result, the seesaw would not be able to balance perfectly on the moon without some adjustments.

To balance the seesaw on the moon, the position of the children would need to be adjusted. The child with less weight would need to move closer to the center of the seesaw, while the child with more weight would need to move towards the end of the seesaw. By adjusting their positions, they can compensate for the weaker gravitational force and maintain balance on the seesaw.

In summary, the children would not be able to balance perfectly on the seesaw if it were brought to the moon. They would need to adjust their positions to account for the weaker gravity in order to maintain balance.

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Answer:

usa

Explanation:

Given :

Initial velocity, u = -15 m/s.

Acceleration , a = 2 m/s².

Time taken to applied brake, t = 2.5 s.

To Find :

The velocity of the car at the end of the braking period.

How far has the car moved during the braking period.

Solution :

By equation :

\(v = u+at\\\\v=-15 + 2\times 2.5\\\\v=-10 \ m/s\)

Now, distance covered by car is :

\(s=ut+\dfrac{at^2}{2}\\\\s=(-15)(2.5)+\dfrac{2(2.5)^2}{2}\\\\s=-31.25\ m\)

Hence, this is the required solution.

Answer:

3 meters

Explanation:

add up dum boi

A person's perception of how morally severe an ethical issue is moral intensity. The correct option is C.

Moral intensity refers to a person's perception or evaluation of the moral severity or significance of an ethical issue. It reflects the degree to which an ethical situation is perceived as morally relevant or ethically important to an individual.

When assessing an ethical issue, people consider various factors such as the potential harm caused, the social norms and values involved, the consequences for stakeholders, the violation of rights or duties, and the extent of moral obligations. These factors contribute to the perceived moral intensity of the issue.

Moral intensity encompasses the subjective evaluation of the seriousness, magnitude, and urgency of an ethical dilemma. It goes beyond the objective assessment of the situation and takes into account the personal values, beliefs, and emotional reactions of individuals.

By considering moral intensity, individuals can determine the level of moral concern and the ethical actions they should take in response to a particular situation. It helps in prioritizing ethical issues and guiding decision-making processes.

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The amplitude of the reflected wave is opposite to the amplitude of the original wave.

When a wave reflects across a free boundary, it undergoes a change in direction and amplitude. The reflected wave looks like the original wave, but it's inverted. It means that the reflected wave's crest becomes a trough, and the trough becomes a crest.What is a wave?A wave is a disturbance that travels through space and time, carrying energy without carrying matter along with it. The movement of energy through a body of water, such as the ocean, is a typical example of a wave.A free boundary refers to a boundary that is not restricted. An example of a free boundary is a reflecting surface. When waves reflect off of a free boundary, they bounce back in the opposite direction. The angle of reflection equals the angle of incidence.The wave looks similar to the original wave, but it is inverted or flipped. The crest of the original wave becomes the trough of the reflected wave, and the trough becomes the crest.

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Answer:

resistances is inversely proportional to the area of cross section of the conductor

Explanation:

The resistance of a wire is directly proportional to its length and inversely proportional to its cross-sectional area.

hope this helps you

have a nice day:)

Answer:

wavelength = (3×10^8 m/s)(6×10^5 Hz)

= 1.8×10^14 m

Answer:

Explanation:

First establish the POSITIVE direction.  We'll say to the RIGHT is positive, and UP is positive.  All you have to do is add forces in the positive direction and subtract forces in the negative direction.  If your answer is positive, the net force is to the right or up;  if your answer is negative, the net force is to the left or down.

Here are your answers:

25-15-15 = -5N left

84-60-10 = 14N up

75-60-2 = 13N right

25+25-25 -15 = 10N right

44+44-100= -12N down

67-76 = 9N right

iIttakes approximately 0.894 seconds for the block to slide the length of the ramp.

The time it takes for the block to slide the length of the ramp can be determined using the equation of motion. We can use the equation s = ut + (1/2)at^2, where s is the distance traveled, u is the initial velocity, t is the time taken, and a is the acceleration.

In this case, the block starts from rest (u = 0), travels a distance of 2 meters (s = 2m), and reaches a final velocity of 4 m/s. Since the block slides down a ramp, it experiences a constant acceleration due to gravity (a = 9.8 m/s^2).

Using the equation s = ut + (1/2)at^2, we can solve for time:

2 = 0*t + (1/2)(9.8)t^2
2 = 4.9t^2
t^2 = 2/4.9
t ≈ √(2/4.9)
t ≈ √(20/49)
t ≈ √(4/7) ≈ 0.894 s

Therefore, it takes approximately 0.894 seconds for the block to slide the length of the ramp.

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Answer:

See below

Explanation:

Answer 3 and 6   with  F = ma    to find the 'a'   or F  

 4 and 5 are also   F = ma     with  a = 9.81 m/s^2

Answer:

sa64

Explanation:

Surfactants (surface-active agents) are compounds that lower the surface tension of a liquid.

They work by accumulating at the liquid-gas interface and preventing water molecules from forming strong hydrogen bonds with each other, resulting in a decrease in surface tension.

A surfactant, or surface active agent, is a substance that reduces the surface tension of a liquid by altering the properties of the surface of the liquid. They typically contain both hydrophilic and hydrophobic elements, allowing them to interact with both water and oil.

The way surfactants work to reduce surface tension is explained below:Surfactants have a hydrophilic head (attracted to water molecules) and a hydrophobic tail (repelled by water molecules). When surfactants are added to water, they orient themselves at the surface between the water and the air.The hydrophobic tails of the surfactant molecules attach themselves to the air, while the hydrophilic heads face the water.

Because the tails are being pulled in two directions by the opposing forces of water and air, the surface tension of the water decreases.The greater the concentration of surfactants in the water, the more surfactant molecules there are at the surface of the water, and the lower the surface tension.

As a result, surfactants are used in a variety of applications to lower surface tension and modify wetting, emulsifying, and foaming characteristics.

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Answer:

2. deer

Explanation:

The lion, spider, and snake eat meat or to an extent.

Deer don't eat meat

Answer:

deer :)

Explanation:

The rest are basically carnivores

The total distance traveled by the mass after a time interval is 4A. Option E is correct.

In simple harmonic motion (SHM), the motion of the mass on a spring repeats itself periodically. The total distance traveled by the mass after a time interval τ depends on the relationship between τ and the period T.

The period T is the time it takes for one complete cycle of the motion. In other words, it is the time for the mass to go from one extreme (maximum displacement) to the other extreme and back again. During this time, the mass covers a distance of 2A, where A is the amplitude of the motion.

Now, let's consider the time interval τ. If τ is equal to or less than the period T, it means that the time interval falls within one complete cycle of the motion. In this case, the mass will cover a distance of 2A, as mentioned earlier.

However, if τ is greater than the period T, it means that the time interval spans multiple cycles of the motion. In each cycle, the mass covers a distance of 2A. Since there will be multiple cycles in the time interval τ, the total distance traveled by the mass will be greater than 2A.

The mass will travel a total distance of 4A after the time interval τ.

Therefore, Option E is correct.

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The cylindrical pressure vessel is constructed from steel plates that are welded along the 45° seam. The vessel has an inner radius of 1.25 mm and a wall thickness of 18 mm.

The inner radius of 1.25 mm specifies the distance from the center of the cylinder to its inner surface. The wall thickness of 18 mm refers to the distance between the inner and outer surfaces of the cylinder.

The welding along the 45° seam suggests that the steel plates are joined at an angle of 45 degrees. This seam is crucial for maintaining the structural integrity and pressure resistance of the cylindrical vessel.

Overall, the cylindrical pressure vessel is designed to withstand internal pressure while maintaining a specific inner radius, wall thickness, and welding configuration along the 45° seam.

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Answer:

\(\boxed {\boxed {\sf 157.5 \ Joules }}\)

Explanation:

Work is equal to the product of force and distance.

\(W=F*d\)

The box is being pushed with an effort (force) of 45 Newtons and the distance is 3.5 meters.

\(F= 45 \ N \\d= 3.5 \ m\)

Substitute the values into the formula.

\(W= 45 \ N * 3.5 \ m\)

Multiply.

\(W= 157.5 \ N*m\)

\(W= 157.5 \ J\)

157.5 Joules of work are done on the crate.

Answer:

The mass flow rate of water from the tank can be found using the Bernoulli's equation which states that the total energy of a fluid remains constant along a streamline. Applying Bernoulli's equation between the surface of the water in the tank and the orifice at the bottom, neglecting the height difference, we get:

P/ρ + gh + 1/2 * V^2 = P₂/ρ + 1/2 * V₂^2

where P is the pressure at the surface of the water in the tank, ρ is the density of water, g is the acceleration due to gravity, h is the height of the water surface above the orifice, V is the velocity of water at the surface of the water in the tank, P₂ is the pressure at the orifice, and V₂ is the velocity of water at the orifice. Since the orifice is at the bottom of the tank, h is zero, and V₂ is the velocity of water discharging from the orifice, which can be calculated using the continuity equation:

A₁V = A₂V₂

where A₁ is the cross-sectional area of the tank, and V is the velocity of water at the surface of the water in the tank.

Combining these equations and solving for the mass flow rate, we get:

m_dot = A₂ * sqrt(2 * ρ * (P - P₂))

Now, if a pipe of area A₂ and length H/2 is attached to the orifice, the velocity of water at the end of the pipe will be different than the velocity of water discharging from the orifice. We can use the Bernoulli's equation again between the orifice and the end of the pipe to calculate the velocity of water at the end of the pipe:

P₂/ρ + 1/2 * V₂^2 = P₃/ρ + gh + 1/2 * V₃^2

where P₃ is the pressure at the end of the pipe, and V₃ is the velocity of water at the end of the pipe. Again, neglecting the height difference, we get:

P₂/ρ + 1/2 * V₂^2 = P₃/ρ + 1/2 * V₃^2

Since the pipe is attached to the orifice, the pressure at the end of the pipe is atmospheric pressure Po, and the velocity of water at the end of the pipe can be calculated using the continuity equation:

A₂V₂ = A₃V₃

where A₃ is the cross-sectional area of the pipe.

Combining these equations and solving for the increase in mass flow rate, we get:

Δm_dot = A₃ * sqrt(2 * ρ * (P₂ - Po))

To find the pressure at point C for the two cases, we need to apply the Bernoulli's equation between the surface of the water in the tank and point C. Neglecting the height difference again, we get:

P/ρ + 1/2 * V^2 = Pc/ρ + 1/2 * Vc^2

where Pc is the pressure at point C, and Vc is the velocity of water at point C. For the first case, where the pipe is not attached to the orifice, we can assume that the velocity of water at point C is negligible, i.e., Vc = 0. Solving for Pc, we get:

Pc = P - 1/2 * ρ * V^2

For the second case, where the pipe is attached to the orifice, we can assume that the velocity of water at point C

Answer:

0 degrees

Explanation:

this is because when the light ray hits a surface a medium at 90 degrees then the angle of incidence = 0 , thus light doesn't bend when it enters the medium, no bending means angle of refraction is 0 degrees

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The magnitude of the force F required to rotate the pulley with a radius of 0.05 m and moment of inertia of 0.2 kg·m², resulting in an angular acceleration of 2 rad/s², is 0.4 N.

To determine the magnitude of the force F, we need to consider the torque acting on the pulley and the moment of inertia of the pulley. The torque exerted on an object is equal to the product of the force applied and the lever arm distance.

The torque (τ) can be calculated using the formula:

τ = I * α

In this case, the given moment of inertia of the pulley is 0.2 kg·m² and the angular acceleration is 2 rad/s².

τ = (0.2 kg·m²) * (2 rad/s²)

τ = 0.4 N·m

The torque is equal to the force F multiplied by the radius (r) of the pulley. Since the radius is given as 0.05 m, we can write the equation as:

τ = F * r

0.4 N·m = F * 0.05 m

F = 0.4 N / 0.05 m

F = 0.4 N

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Answer:

The answer is 0km

Explanation: