Seagulls are often observed dropping clams and other shellfish from a height to the rocks below, as a mean of opening the shells. If a seagull drops a shell from rest at a height of 14.0m, how fast is the shell moving when it hits the rocks?

Answer:

Interferometer

Explanation:

Answer:

A. Any object that has motion has kinetic energy, while any object not in motion but with the potential to do work has potential energy.

Explanation:

Kinetic energy is associated to the motion energy in which object moves with certain speed.

It is given by the formula

[tex]E_k = \frac{1}{2}mv^2[/tex]

Now similarly we can define potential energy as the energy stored in an object which is due to its position and the object must be at rest.

It may be of gravitational potential energy or spring potential energy or any other type

Gravitational potential energy is given as

[tex]E_p = mgh[/tex]

both kinetic energy and potential energy is part of mechanical energy

so correct answer would be

A. Any object that has motion has kinetic energy, while any object not in motion but with the potential to do work has potential energy.

In weather modification, the use of large fans to mix surface air with air aloft is referred to as forced convection. Forced convection, influenced by external forces like fans, allows for a cycling of air by bringing cooler higher altitude air down while propelling warmer surface air up. This is used to improve weather conditions such as reducing smog or fog.

The type of weather modification that involves the use of large fans to mix surface air with air aloft is called forced convection. In forced convection, the flow of air (or other matter) is encouraged by external forces like fans. To understand this, you need a certain knowledge of thermodynamics.

For instance, similar to the way a house fan works by moving cooler air in to replace warmer air, large fans in a weather modification context can be used to promote air movement on a larger scale. This is done by drawing cooler, higher altitude air down to the ground, while pushing warmer surface air up, thus creating a cycle of air called convection.

This process is used for various purposes such as reducing ground-level fog or smog. An interesting example of a natural occurrence of forced convection is shown in Figure 3.1, where a weak cold front of air pushes smog over the Yellow Sea, capturing by NASA's Terra satellite in 2012.

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Final answer:

It takes less force to accelerate a low mass object compared to a high mass object by the same amount because acceleration is inversely proportional to mass, as stated in Newton's second law of motion (F = ma).

Explanation:

Understanding Force and Acceleration

The student's question concerns why it takes less force to accelerate a low mass object compared to a high mass object by the same amount. This is explained by Newton's second law of motion, which states that the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass.

The law is usually written as F = ma, where F is the force applied, m is the mass of the object, and a is the acceleration. When you apply the same force to two objects of different masses, the object with lower mass will experience a greater acceleration because acceleration is inversely proportional to mass.

For example, applying a force to a basketball will result in a greater acceleration than applying the same force to a car, assuming all other factors such as friction are negligible. This is because the basketball has a smaller mass compared to the car.

Similarly, Newton's second law can be used to calculate how a person's weight, or the force of gravity on the person, changes when on a different planet like the Moon, which has a lower acceleration due to gravity compared to Earth. This principle not only applies to linear motion but also to rotational motion. The angular acceleration of an object is also inversely proportional to its mass, meaning a lighter object will spin faster when the same rotational force is applied to it.

The coefficient of the balanced chemical equation always express the ratio of moles of reactants and the products as before performing the stoichiometric calculations, the equation should be balanced and the stoichiometric coefficient of the given reactant or product is the number of molecules participating in that equation. The stoichiometric calculations are mostly done in moles rather than in molecules.

Newton's Second Law and the Impulse-Momentum Relationship are intricately connected in physics due to their shared focus on force, acceleration, and momentum.

Newton's Second Law directly relates the total force that acts on an object to its acceleration at a specific time. The Impulse-Momentum Relationship involves force acting over time to change momentum, which is closely connected to Newton's second law.

Momentum continues to be a key concept in physics and is broadly applicable in various scenarios, including the study of atomic and subatomic particles.

Which of the following is known as the pulse of a wave?

A non-recurrent wave and one cycle of a wave motion.

Answer:

A non-recurrent wave and one cycle of a wave motion.

Explanation:

Yes, an object can have both kinetic energy and potential energy at the same time, such as a ball during its flight. These forms of energy can transform into each other without external work in a closed system.

An object can indeed have both kinetic energy and potential energy at the same time. For instance, a ball thrown in the air has kinetic energy due to its motion and potential energy due to its height above the ground. As it rises, its kinetic energy decreases while its potential energy increases, and vice versa when it falls back down. Energy transformation between kinetic and potential energy occurs without the need for external work if no friction or air resistance is present. In a closed system where no energy is lost to the environment, the sum of potential and kinetic energy remains constant according to the conservation of energy principle.

Answer:

Companies will tend to seek lower costs by outsourcing labor

Explanation:

Globalization, in its current form, is led by the large multinationals and neoliberalism. Thus, large corporations settle in many underdeveloped countries in search of abundant raw material and cheap labor. This cheap labor has no alternative but to be subjected to low wages, which, in general terms, ends up shaping the source of misery worldwide. This has been worrying many workers, as the cheapness of mother labor results in lower quality of life for them and their families.

The net force is the product of mass and acceleration. Thus, acceleration of a force of 6 f for an object of mass 2 m is 6 f/m.

Acceleration of a body is the rate of change of its velocity. It is a vector quantity thus, having both magnitude and direction. The commonly used unit of acceleration is m/s².

According to Newton's second law of motion force is the product of mass and acceleration of the body. Thus an increase in mass or acceleration increases the force acting on the body.

Given the mass = 2m

Force = 6 f

acceleration = force /  mass

                     = 6f /2m = 3

Lets take force in 6 N and mass in 2 Kg, then the acceleration is 3 m/s².

Therefore, the acceleration of object of 2 kg to have a force of 6 N is 3m/s².

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Final answer:

Commonly, air pressure in weather reports is measured in millibars (mb) and inches of mercury (in. Hg), where average sea level pressure is about 1013.2 mb or 29.92 in. Hg.

Explanation:

The two units of air pressure that are commonly used in weather reports are millibars (mb) and inches of mercury (in. Hg). Under average sea level conditions, the atmospheric pressure is approximately 1013.2 millibars or 29.92 inches of mercury. When watching a weather forecast, you might hear meteorologists refer to high and low-pressure systems using these units. High pressure is associated with greater than 1013.2 millibars and is typically indicative of fair weather, while low pressure is lower than this value, often leading to more stormy conditions.

Answer:

The upward velocity is 5.6 m/s.

(5) is correct option.

Explanation:

Given that,

Height = 1.6 m

We need to calculate the the upward velocity

Using equation of motion

[tex] v^2=u^2-2gh[/tex]

[tex]u=\sqrt{2gh}[/tex]

Here, g = acceleration due to gravity

v = final velocity

u = initial velocity

h = height

Put the value into the formula

[tex]u=\sqrt{2\times9.8\times1.6}[/tex]

[tex]u=5.6\ m/s[/tex]

Hence,  The upward velocity is 5.6 m/s.

According to the principle of conservation of momentum, two bowling balls of different masses can maintain the same momentum as long as the product of their mass and velocity is identical. Essentially, a lighter ball would need to move faster and a heavier ball slower to achieve the same momentum.

The subject matter of your question is fundamentally linked to the principle of conservation of momentum which states that the total momentum of a closed system remains constant if no external forces act upon it. Momentum, denoted as 'p', is the product of an object's mass 'm' and its velocity 'v' (p=mv).

Therefore, even if two bowling balls have different masses, they can still have the same momentum if their velocities compensate for the difference in mass. For instance, a lighter ball (smaller m) would need to be moving faster (higher v), while a heavier ball (larger m) would need to be moving slower (smaller v).

Consider this example: a 5 kg bowling ball moving at 2 m/s and a 10 kg bowling ball moving at 1 m/s. Even though the balls have different masses, their momenta are the same (5 kg * 2 m/s = 10 kg * 1 m/s = 10 kg m/s).

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The time the plane requires for takeoff, calculated using the equations of motion, is 50 seconds. The plane's velocity at takeoff is 80 m/s.

The subject of your question involves motion in linear dimensions which is a concept in physics. We can solve this using the equations of motion. We can use equation s = ut + 0.5at², where s is the distance, u is the initial velocity, a is the acceleration, and t is the time. Since the plane starts from rest, u = 0. Thus, the equation turns into s = 0.5at².

To find the time required for takeoff, we rearrange the equation to solve for t, giving us t = sqrt(2s/a). Substituting the given values, we find t = sqrt((2 * 1600m)/1.6m/s²) = 50 seconds.

For the plane’s velocity at takeoff, we can use the equation v = u + at where v is the final velocity. Since again the plane starts from rest, u = 0. Substituting the given values, we find the plane's velocity at takeoff to be v = 0 + (1.6m/s² * 50s) = 80 m/s.

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While fluid overload and dehydration are generally opposite conditions, they can coexist if there is a water and electrolyte balance disruption.

Fluid overload and dehydration are typically seen as opposite conditions, but they can coexist under certain circumstances such as when there is a disruption in water and electrolyte balance. Dehydration occurs when the loss of water exceeds the intake, substantially reducing the body's water content. Signs of dehydration include thirst, dizziness, headaches, and in severe cases, loss of consciousness or death.

During fluid overload, the body may hold onto too much water, possibly leading to conditions like hyponatremia, where sodium levels are abnormally low. In contrast, during dehydration, the concentration of electrolytes becomes greater outside of cells, leading to water leaving cells and making them shrink. Both conditions can have severe consequences if not properly managed.

Severe cases of dehydration can lead to electrolyte imbalances and the body's inability to function correctly due to insufficient water. This can happen due to factors such as prolonged physical activity with excessive sweating and insufficient fluid intake, especially in hot weather conditions or during endurance sports. Such imbalances need to be treated promptly to restore the body's fluid and electrolyte balance.

The example of positive feedback is, " warmer temperatures on earth's surface decrease the evaporation of water."

     Warmer temperature on the earth's surface decreases the evaporation of water.

Because, the temperature of the earth will become hot , cold, warm etc.. this happens due to the evaporation of water.

Hence, Option A is the correct answer.

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Answer:

Choice a

Explanation:

The weight is defined in formulaic terms as the mass *g

You know the mass to be 70 kg so multiply by g which gives choice (A)

A good way to check is that you know weight has the units newtons (N) and you know kg* m/s^2 qill yield newtons therefore choice A is correct

Hope this helps :)

Answer:

See image

Explanation:

Plato