the lowest point in death valley is 85.0 m below sea level. the summit of nearby mr. whitney has an elevation of 4420 m above sea level. what is the change in gravitational potential energy of an energetic 65.0 kg hiker who makes it from the floor of death valley to the top of mr. whitney? (answer: 2.87 x 106 j)

Answer:

The efficiency of a simple machine such as an inclined plane will decrease if the plane is made steeper. This is because a steeper plane requires more force to lift the same load, leading to a greater loss of energy due to friction and other sources of inefficiency. A gentler slope allows the force applied to the load to be spread out over a greater distance, reducing the force required to lift the load and therefore increasing the overall efficiency of the machine.

Explanation:

ALLEN

Answer:

D-A radiator emitting warm air and drawing in cool air

Explanation:

Answer:

It add strength to the metal, along with other enhanced chemical properties. Hardness, machinability, and corrosion resistance are other properties that can be added or enhanced by creating an alloy.

I hope my answer helps you.

A magnet is a material or object that produces a magnetic field. This magnetic field is invisible but is responsible for the most notable property of a magnet: a force that pulls on other ferromagnetic materials, such as iron, and attracts or repels other magnets.

A permanent magnet is an object made from a material that is magnetized and creates its own persistent magnetic field. An everyday example is a refrigerator magnet used to hold notes on a refrigerator door. Materials that can be magnetized, which are also the ones that are strongly attracted to a magnet, are called ferromagnetic (or ferrimagnetic). These include the elements iron, nickel and cobalt and their alloys, some alloys of rare-earth metals, and some naturally occurring minerals such as lodestone. Although ferromagnetic (and ferrimagnetic) materials are the only ones attracted to a magnet strongly enough to be commonly considered magnetic, all other substances respond weakly to a magnetic field, by one of several other types of magnetism.

Ferromagnetic materials can be divided into magnetically "soft" materials like annealed iron, which can be magnetized but do not tend to stay magnetized, and magnetically "hard" materials, which do. Permanent magnets are made from "hard" ferromagnetic materials such as alnico and ferrite that are subjected to special processing in a strong magnetic field during manufacture to align their internal microcrystalline structure, making them very hard to demagnetize. To demagnetize a saturated magnet, a certain magnetic field must be applied, and this threshold depends on coercivity of the respective material. "Hard" materials have high coercivity, whereas "soft" materials have low coercivity. The overall strength of a magnet is measured by its magnetic moment or, alternatively, the total magnetic flux it produces. The local strength of magnetism in a material is measured by its magnetization.

An electromagnet is made from a coil of wire that acts as a magnet when an electric current passes through it but stops being a magnet when the current stops. Often, the coil is wrapped around a core of "soft" ferromagnetic material such as mild steel, which greatly enhances the magnetic field produced by the coil.

Answer:

Observations of white dwarf supernovae

Explanation:

Less momentum in magnitude and more kinetic energy. Because it is heavier, the bowling ball has more kinetic energy. As mass grows, kinetic energy rises. Kinetic energy is also impacted by velocity.

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Metals - Conductivity and weight can be tailored, Ceramics - Good electrical and thermal insulators, Composites - The level of conductivity or resistivity can be controlled, Polymers - Poor electrical and thermal conductivity, Semiconductors - low compressive strength.

Metals: Metals are known for their good electrical and thermal conductivity. They are excellent conductors of electricity and heat, allowing for efficient transfer of these forms of energy.
Ceramics: Ceramics, on the other hand, are good electrical and thermal insulators. They possess high resistivity to the flow of electricity and heat, making them suitable for applications where insulation is required.
Composites: Composites are materials that consist of two or more different constituents, typically combining the properties of both. The conductivity and weight of composites can be tailored based on the specific composition.
Polymers: Polymers are characterized by their low conductivity, both electrical and thermal. They are poor electrical and thermal conductors.
Semiconductors: Semiconductors possess unique properties where their electrical conductivity can be controlled. They have an intermediate level of conductivity between conductors (metals) and insulators (ceramics).

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Answer:

3.76 m/s.

Explanation:

Velocity in mile per hour (mph) = 8.4 miles per hour

Velocity in metre per second (m/s) =?

Next, we shall convert 8.4 mph to ft/h. This can be obtained as follow :

1 mph = 5280 ft/h

Therefore,

8.4 mph = 8.4 mph / 1 mph × 5280 ft/h

8.4 mph = 44352 ft/h

Next, we shall convert 44352 ft/h to in/h. This is illustrated below:

1 ft/h = 12 in/h

Therefore,

44352 ft/h = 44352 ft/h / 1 ft/h × 12 in/h

44352 ft/h = 532224 in/h

Next, we shall convert 532224 in/h to m/h. This can be obtained as follow:

39.37 in/h = 1 m/h

Therefore,

532224 in/h = 532224 in/h / 39.37 in/h × 1 m/h

532224 in/h = 13518.51664 m/h

Next, we shall convert 13518.51664 m/h to m/min. This is illustrated below:

1 m/h = 1/60 m/min

Therefore,

13518.51664 m/h = 13518.51664 m/h / 1 m/h × 1/60 m/min

13518.51664 m/h = 225.30861 m/min

Finally, we shall convert 225.30861 m/min to m/s. This is illustrated below:

1 m/min = 1/60 m/s

Therefore,

225.30861 m/min = 225.30861 m/min / 1 m/min × 1/60 m/s

225.30861 m/min = 3.76 m/s

Therefore,

8.4 miles per hour is equivalent to 3.76 m/s.

Unit conversion does not change the real value. The velocity of the particle, when converted to meters per sec, is 3.756.

Unit conversion is a way of converting some common units into another without changing their real value. for, example, 1 centimeter is equal to 10 mm, though the real measurement is still the same the units and numerical values have been changed.

In order to convert the unit of velocity, we will first convert miles to meters and then, hours to seconds.

As it is given to us,

1 mile = 5280 ft

1 ft = 12 inches

1 m = 39.37 in

Now, since 1 m = 39.37 inches, therefore

\(1\rm\ in =\dfrac{1}{39.37}\ m\)

Converting a mile to meter,

\(1\rm\ miles = 5280\ ft \times 12\ inches\times \dfrac{1}{39.38} m\\\\1\ miles = 1609.652\ m\)

Converting hours to seconds

\(1\rm\ hour = 60\ minutes \times 60\ seconds\\\\1\ hour = 3600\ seconds\)

Now, converting the velocity we will get,

\(1 \rm\ \dfrac{miles}{hour} = \dfrac{1609.652}{3600}\ \dfrac{m}{s}\\\\1 \rm\ \dfrac{miles}{hour} =0.447\ \dfrac{m}{s}\)

Now, as given to us the velocity of a particle is 8.4 miles\hour, therefore,

\(8.4 \rm\ \dfrac{miles}{hour} =8.4 \times 0.447\ \dfrac{m}{s}\\\\8.4 \rm\ \dfrac{miles}{hour} =3.756\ \dfrac{m}{s}\\\\\)

Hence, the velocity of the particle when converted to meters per sec is 3.756.

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Answer:

The associated SI unit of force and weight is the Newton, with 1 kilogram weighing 9.8 Newtons under standard conditions on the Earth's surface. However, in the US common units, the pound is the unit of force (and therefore weight). The pound is the widely used unit for commerce.

Answer:

Force: Newtons

Nmaed after Isaac Newton

Weight: also Newtons:)

Explanation:

1, = 0.001. 2, = 0.002. 3, = 0.003.

I study in astronymy in College I had a question like this.

Long-period comets are set in motion towards the Sun from the Oort cloud by gravitational perturbations caused by passing stars and the galactic tide. Hyperbolic comets may pass once through the inner Solar System before being flung to interstellar space. The appearance of a comet is called an apparition.

This question can be solved by using equations of motion.

A. The grapefruit dropped by "3.1 m".

B. The speed of the grapefruit, when it hit the ground was "7.8 m/s".

A.

We will use the second equation of motion here to find out the distance dropped by the grapefruit:

\(h = v_it+\frac{1}{2}gt^2\)

where,

h = height dropped = ?

vi = initial speed = 0 m/s

t = time period = 0.8 s

g = acceleration due to gravity = 9.81 m/s²

Therefore,

\(h = (0\ m/s)(0.8\ s)+\frac{1}{2}(9.81\ m/s^2)(0.8\ s)^2\)

h = 3.1 m

B.

Now, we will use the first equation of motion to find out the final speed:

\(v_f = v_i +gt\)

vf = 0 m/s + (9.81 m/s²)(0.8 s)

vf = 7.8 m/s

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The attached picture shows the equations of motion in the horizontal and vertical directions.

Magma is called for the dense mix of dry hot rock fragments and hot gas erupting from volcanic vent at high speed.

Magma is the extremely hot liquid and flows under the surface of the earth. When this liquid comes out to the surface of earth, then called as lava.

Gas bubble, making up to lave are energetic in nature, because they keep on expanding in all directions, they will go all out to the only open are of a volcano, the vent, in an upward direction.

Hence Magma is called for the dense mix of dry hot rock fragments and hot gas erupting from volcanic vent at high speed.

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The correct option is 2. The solid state is more dense than the liquid state.

The solid form of most substances is denser than the liquid phase so a block of most solids will sink in the liquid but a block of ice floats in liquid water because ice is less dense. Upon freezing the density of water decreases by about 9%. This is due to cooling of intermolecular vibrations allowing the molecules to form steady hydrogen bonds and locking into positions of hexagonal packing upon freezing to ice. These bonds are shorter in the crystal than in the liquid.

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As per the figure , heat engines, (b) violates the first law of thermodynamics and (a) violates the second law of thermodynamics.

The First Law of Thermodynamics states that energy cannot be created or destroyed but can be transferred from one form to another. It's often referred to as the Law of Conservation of Energy.

The Second Law of Thermodynamics states that energy is constantly changing from a more concentrated to a less concentrated state. As a result, heat is not going to spontaneously flow from a colder body to a hotter one. The entropy of a closed system can only increase or remain constant.

Heat engines are devices that convert thermal energy to mechanical energy. In heat engines, the energy absorbed as heat is transformed into mechanical work by following the laws of thermodynamics, particularly the second law. The efficiency of a heat engine is always less than 100 percent, according to the second law of thermodynamics. The Carnot cycle, a theoretical thermodynamic cycle, is the most efficient heat engine cycle.

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Complete question:

Camouflage is not a general adaptation.

Adaptation refers to the evolutionary process through which organisms develop certain traits or characteristics that allow them to survive and reproduce in their environment. These traits can be physical, behavioral, or physiological and are shaped by natural selection.

Adaptations can be both structural, such as the long neck of a giraffe, or functional, such as the ability of some plants to tolerate drought conditions. They can also be behavioral, such as the way in which some birds build their nests, or physiological, such as the ability of some animals to regulate their body temperature in extreme environments.

Camouflage is a specific adaptation. It refers to an animal's ability to change the color or pattern of its body to blend in with its environment. It does not have the same universal application as other general adaptations, such as streamlined shapes to reduce friction or legs for walking.

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The shortest chain sling, ACB, that can be used to lift the loaded bin without exceeding a tension of 5 kN

To determine the shortest chain sling configuration, we need to consider the forces acting on the loaded bin during lifting. The maximum tension in the chain sling should not exceed 5 kN.

Let's assume that A, B, and C are the lifting points on the loaded bin, and ACB represents the chain sling configuration.

To calculate the tension in the chain sling, we need to consider the angles at each point and the weight of the loaded bin.

Let W be the weight of the loaded bin (in kN) and θ1, θ2, and θ3 be the angles at points A, B, and C, respectively.

The tension in the chain sling, T, can be calculated using the following formula:

T = W / [(cos θ1)(cos θ2)(cos θ3)]

To find the shortest chain sling configuration, we need to determine the values of θ1, θ2, and θ3 that minimize the tension T while not exceeding 5 kN.

By applying appropriate rigging techniques and considering the geometry of the loaded bin and the available lifting points, the specific chain sling configuration, ACB, can be determined. This may involve using various combinations of chain lengths and angles to achieve the desired result.

The shortest chain sling configuration, ACB, that can be used to lift the loaded bin without exceeding a tension of 5 kN is determined based on the weight of the bin, angles at the lifting points, and the calculated tension in the chain sling. This configuration can be obtained by employing appropriate rigging techniques and considering the specific requirements of the lifting operation.

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Using a saltwater aquarium to model the ocean has limitations, such as showing only a small part of the actual ocean and being unable to replicate the vastness and complexity of the ocean ecosystem.

One limitation of using a saltwater aquarium to model the ocean is that it can only show a small part of the actual ocean. Since an aquarium is confined and limited in size, it cannot realistically replicate the vastness and complexity of the ocean ecosystem. For example, it may not have the space to accommodate large marine animals like whales or the turbulent currents that exist in the open ocean. Therefore, it is important to recognize that while a saltwater aquarium can provide some insights into the ocean, it cannot fully capture the dynamic nature and diverse interactions found within the entire ocean ecosystem.

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Answer:If you mean how much heat it can transfer as a thermal mass - in order to move heat from one place to another:

Typically the relationships are given by specific heat capacity (at different temperatures) and latent heats, plus the end-point temperatures to determine which of these conversion factors are relevant.

If time comes into it, you are looking at including shape and thermal conductivity at the minimum, so you really would need to be more specific

Explanation:

Answer:

YES

Explanation:

Asexual means the plant is identical to the parent

Answer:

true

Explanation: Asexual reproduction produces plants that are genetically identical to the parent plant because no mixing of male and female gametes takes place.

Answer:true

Explanation:

Answer:

\(mass = 2.0kg\)

Explanation:

Greetings!!!

Force (F)= 10N

Acceleration (a)= 5m/s²

Mass(m)= ?

Firstly, recall the Newton's second law.

substitute known variables into the equation

solve for mass.

if you have any questions or unclear ideas tag on comments

Hope it helps!!!

Explanation:

Given:

v₀ = 0 m/s

a = 3 m/s²

t = 4 s

Find: Δx and v

Δx = v₀ t + ½ at²

Δx = (0 m/s) (4 s) + ½ (3 m/s²) (4 s)²

Δx = 24 m

v = at + v₀

v = (3 m/s²) (4 s) + 0 m/s

v = 12 m/s

Answer:

the answer is at the BOTTOM OF THEIR QUESTION

Explanation:

IT IS CORRECT BTW

The following statement “Adams and Leverrier predicted the position of Neptune, based on its perturbation analysis of uranus.” is True.

Adams and Leverrier independently predicted the position of Neptune based on their observations of the perturbations in the orbit of Uranus. In the mid-19th century, astronomers noticed that Uranus was not moving exactly as predicted by Newtonian mechanics, suggesting the presence of an unknown celestial body influencing its orbit.

Using mathematical calculations and perturbation analysis, John Couch Adams (an English mathematician) and Urbain Le Verrier (a French mathematician) separately predicted the existence and approximate position of Neptune. Their predictions led to the actual discovery of Neptune in 1846.

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Answer:

Ohms

Explanation:

Ω this is the symbol

The net work done on the cart must be 160 Joules (J) in order to change its speed from 6 m/s to 10 m/s.

The initial kinetic energy (K₁) :

K₁ = (1/2) × m × v₁²

where m is the mass of the cart (5 kg) and v₁ is the initial velocity (6 m/s).

K₁ = (1/2) × 5 × (6)²

K₁ = 90 J

The final kinetic energy (K₂):

K₂ = (1/2) × 5 × (10)²

K₂ = 250 J

The change in kinetic energy (ΔK) is given by:

ΔK = K₂ - K₁

ΔK = 250  - 90

ΔK = 160 J

Therefore, the net work done on the cart must be 160 Joules (J) in order to change its speed from 6 m/s to 10 m/s.

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Answer:

A.

Explanation:

B,C,D is not right because those do not pay a factor on kinectic energy

When a fragment of bone containing carbon-14 isotopes of the element carbon is discovered during an archaeological dig, and it is estimated to be approximately 23,000 years old, one can calculate the proportion of the carbon-14 isotopes that remains.

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