A giraffe trots 3.40 km due north, then 2.60 km due west. what is the magnitude of its displacement?

Answer:

Option 2.) Thermal energy is transferred by electromagnetic waves.

Explanation:

just answered it on e2020

Answer:

Explanation:

When an object is moving around a circular path with a uniform speed the motion os said to be uniform cicular motion. It is the example of accelerated motion as the direction of motion keeps on changing every instant.

When a body is in uniform circular motion, it experiences a force towards the centre of circular path, this force is called centripetal force.

The formula of centripetal force is given by

F = mv^2 / r

Where m is the mass of body, V be the speed of body and R be the radius of circular path

F = 11 × 3.5 × 3.5 / 0.6

F = 224.58 N

Oxygen is more reactive than nitrogen. Because triple bond between two atoms of nitrogen and there is double bond between two atoms of oxygen.Therefore, this statement is true.

Reactivity is a substance's capacity to chemically react with other compounds. Iron, for instance, reacts vigorously with oxygen. Rust is a reddish powder that is created when it reacts with oxygen.

Because nitrogen has a higher dissociation energy than oxygen, its reactivity is lower than that of oxygen at the molecular level. Due to the triple bond that exists between the nitrogen atoms, the bond length of nitrogen is also shorter than that of oxygen.

Due to the strong triple bond between the atoms, the fact that all the valence electrons are in bonding orbitals, and the fact that more energy is required to excite them, Nitrogen is less reactive than Oxygen in the majority of gaseous processes.

Thus, Oxygen is more reactive than nitrogen.

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Final answer:

The Moon orbits Earth instead of the Sun because it is closer to Earth. The strength of gravitational attraction is greater with proximity, despite the Sun's larger mass. The close distance to Earth thus ensures the Moon's stable orbit around it.

Explanation:

Even though the Sun has a greater mass than Earth, the Moon orbits Earth because it's closer to Earth than to the Sun. The gravitational force that an object experiences from another object is not just dependent on the mass but also on the distance between the two objects. In the Earth-Moon system, despite the Moon and the Sun both exerting gravitational forces on each other, the Moon remains in orbit around the Earth because it is much closer to Earth than it is to the Sun.

While the Sun is 27 million times more massive than the Moon, its gravitational pull on the Moon is lesser because it is 387 times farther away from the Earth than the Moon is. The gravitational force decreases with the square of the distance, which means that even a massive object like the Sun exerts a weaker force on the Moon compared to Earth, which is much closer.

Therefore, the Moon's orbit around Earth is stable because the Earth's gravitational pull on the Moon is significantly stronger than that of the Sun's due to the close proximity of the Moon to Earth. In the context of gravitational interactions, this proximity is the key factor in the Moon being Earth's natural satellite.

The force of tension acting on the elevator is calculated using Newton's second law of motion, considering the elevator's weight and its downward acceleration. After computations, the tension force is found to be approximately 15,150 N.

To determine the tension force (Ft) acting on the elevator, we can use Newton's second law of motion, which states that the force is equal to mass times acceleration (F = ma). First, we need to find the mass (m) of the elevator by using the weight (W) of the elevator and the acceleration due to gravity (g), which is approximately 9.81 m/s²:

m = W / g

Therefore, m = 14,700 N / 9.81 m/s² ≈ 1500 kg.

The net force acting on the elevator (Fnet) involves both its weight and the force of tension in the supporting cable, while considering the elevator's downward acceleration:

Fnet = Ft - W = ma

where 'a' is the acceleration of the elevator. Substituting the given values:

Fnet = Ft - 14,700 N = 1500 kg × (-0.30 m/s²)

Ft = 14,700 N + (1500 kg × 0.30 m/s²)

Calculating the terms:

Ft = 14,700 N + 450 N

Ft ≈ 15,150 N.

Therefore, to the nearest whole number, the force of tension acting on the elevator is 15,150 N.

Answer:

c. gravitational potential energy

Explanation:

Gravitational potential energy is the form of energy possessed by an object which is located at a certain height above the ground. This energy is given by:

[tex]U=mgh[/tex]

where:

m is the mass of the object

g is the gravitational acceleration (g=9.8 m/s^2)

h is the height of the object with respect to the ground

We have to note that gravitational potential energy is always measured with respect to a reference altitude (generally, the ground), because the value of h depends on the point chosen as reference.

Answer:

weight of the rock on Uranus is 218 Newton.

Explanation:

Weight of the object is given by,

Weight = mass × gravitational acceleration

For Uranus,

gravitational acceleration = 8.7 [tex]\frac{m}{s^{2} }[/tex]

thus,

Weight of rock on Uranus is,

Weight = mass × gravitational acceleration

Weight = 25 × 8.7

Weight = 217.5 Newton

Thus, weight of the rock on Uranus is 218 Newton.

Answer:

B

Explanation:

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A source of sound is kept in a jar in a vacuum. Air is slowly introduced in to the jar. The loudness of the sound increases gradually  because the air is slowly introduced in to the jar as sound needs a physical medium and in a vacuum there is none.

The pitch of the sound is an important property where the perception of frequency of sound occur by human ear within the range of human hearing, higher the frequency of the sound the higher is its pitch and a lower frequency means a lower pitch.

The loudness of sound can be determined by amplitude of the sound which  is a measure of the magnitude of the maximum disturbance of sound.

The speed of the sound can be detrained as  the sound waves travel through the medium is called the speed of sound and it is different for different mediums, travels fastest in solids.

When sound waves hit the surface of a solid  it reflects back to the same medium as it follows laws of reflection, Timbre is the another  property of sound which is used to differentiate sounds of the same frequency.

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The Black Hills of South Dakota is an example of an eroded "batholith".

Magma does not generally achieve the surface. In the event that gas weights are not sufficiently extraordinary to constrain the magma to the surface, or if overlying rocks can't be infiltrated by it, the magma may gradually cool and frame an extensive pool of stone. Stone is effortlessly unmistakable by its extensive gem structure and blend of minerals, including light-hued quartzes and darker feldspars and micas. An expansive district of intru-sive molten shake, found profound inside the outside, is known as a batholith. Batholiths can frame the center of a mountain run. This batholith, once framed profound inside Earth's outside layer, is presently uncovered at an elevation surpassing 3300 meters (10,000 ft) above ocean level. The Black Hills of South Dakota are another exemplary case of this sort of geologic development.

Answer:

The process of estimating values between measured data points is called. interpolation.

Explanation:

Answer:

The correct statement is “A solstice because the Earth is very close to the Sun”

Explanation:

The solstice occurs when the sun is closer or further from one of the Earth's hemispheres, increasing the duration of the day in one part of the world, and decreasing its duration in the other. That is, during the solstice, the sun is closer to one of the hemispheres, causing the day to have a longer duration, while the night is longer in the other hemisphere.

In the case of the equinox, the sun is on the equator line, so the day and night in both hemispheres have the same duration. At that time the part of the Earth closest to the Sun is the equator.

The solstice is caused because the axis on which our planet rotates on itself is slightly inclined with respect to the translation plane, this is its trajectory around the Sun.

That implies that different regions of the globe receive more or less light at different times of the year.

The equinox like the solstice is presented twice a year, marking the entrance of the seasons. The sunny days are longer during the summer solstice, while the nights are longer during the winter solstice. The equinox occurs at the beginning of autumn and spring, when the sun is closer to the equator.

So the correct statement is “A solstice because the Earth is very close to the Sun”

Final answer:

To find how far the camel is from oasis B after walking 24 km at 19° south of east and then 4 km due north, we use vector components and the Pythagorean theorem.

Explanation:

The problem you're working on is a classic example of vector addition and applying principles of trigonometry to solve for the resultant displacement. The camel starts at oasis A, walks 24 km at a 19° angle south of east, and then walks 4.0 km due north. We're looking to find the distance the camel is from oasis B.

First, we break down the camel's walk into components. The eastward component of the first walk is 24 km × cos(19°), and the southward component is 24 km × sin(19°). After the camel walks 4 km due north, the total southward displacement would be reduced by 4 km. Given that oasis B is due east of oasis A, the eastward component is compared to the 25 km distance between the oases.

To find out how far the camel is from oasis B, we calculate the straight-line distance using the Pythagorean theorem: √((25 km - eastward component)² + (southward component - 4 km)²). Let's calculate these components and solve for the distance.

The eastward component is 24 km × cos(19°) and the reduced southward component is 24 km × sin(19°) - 4 km. Finally, calculate the distance from oasis B using the Pythagorean theorem with the adjusted components.

D. 5ft

Explanation:

The wave base of a wave is the depth at which there is no more perturbation of the medium caused by the wave. The wave base of a wave is determined to be half the wavelength of the wave itself.

In this problem, we have a wave with wavelength of 10 ft, so the wave base is

[tex]b=\frac{\lambda}{2}=\frac{10 ft}{2}=5 ft[/tex]

Final answer:

To calculate the emitted power per square meter for an object at 2600 K, we use the Stefan-Boltzmann law with a value of 5.67 × 10^-8 W/m^2/K^4 for the Stefan-Boltzmann constant. The result for the given object is approximately 1.53 × 10^7 W/m^2.

Explanation:

Finding the Emitted Power Per Square Meter for a Blackbody

To find the emitted power per square meter (intensity) of peak intensity for an object with a temperature of 2600 K, we will use the Stefan-Boltzmann law, which expresses the power radiated per unit area from a blackbody in terms of the Stefan-Boltzmann constant (σ) and the absolute temperature (T) to the fourth power. The Stefan-Boltzmann law can be written as:

dP/dA = σ T^4,

where σ (Stefan-Boltzmann constant) is approximately 5.67 × 10^-8 W/m^2/K^4. We can calculate the power per square meter by plugging the given temperature into this equation:

dP/dA = (5.67 × 10^-8 W/m^2/K^4) × (2600 K)^4,

After calculating, we find that the power emitted per square meter at peak intensity is:

dP/dA = about 1.53 × 10^7 W/m^2.

Therefore, an object at 2600 K emits approximately 1.53 × 10^7 watts per square meter.

Answer:

1) the bird sitting on the tree is not moving, hence he has not kinetic energy. By the fact that the bird is high in the tree you can see that it has some potential energy (wich in this case depends on the height) and the bird has potential energy because has the ability  of doing work (lije jumping down for example)

2) the cook is moving, because he needs to do it in order to prepare the meal, then he has kinetic energy and is doing work (because he puts the energy in order to move himself) the answer is "kinetic energy because he is making the meal.

3) Ok, when you stretch the bow, it wants to return to his original shape, then you are creating elastical energy in the bow, and you are using mechanical energy to stretch the bow.  Then when the bow releases his elastical energy (also you can think that when the string is pushing the arrow, it is applying mechanical energy on the arrow), it propulsates the arrow, creating now kinetic energy into the arrow.

The correct answer is mechanical to elastic, because you need to first use mechanical energy in order to stretch the bow and create the elastic energy, and then mechanical again when the string starts to impulse the arrow.

Answer:

Meter

Liter

Kilogram

The distance is 17 km

The displacement of the boat is about 12 km at 70° S of W

[tex]\texttt{ }[/tex]

Vector is quantity that has magnitude and direction.

One example of a vector is displacement.

Let us now tackle the problem !

[tex]\texttt{ }[/tex]

This problem is about Vector Diagram.

On his fishing trip Justin rides in a boat 12 km south.

[tex]d_1 = -12 \widehat{j}[/tex]

[tex]\texttt{ }[/tex]

The fish aren’t biting so they go 4 km west.

[tex]d_2 = -4 \widehat{i}[/tex]

[tex]\texttt{ }[/tex]

They then follow a school of fish 1 km north.

[tex]d_3 = 1 \widehat{j}[/tex]

[tex]\texttt{ }[/tex]

[tex]\texttt{Total Distance} = 12 + 4 + 1 = 17 \texttt{ km}[/tex]

[tex]\texttt{ }[/tex]

[tex]d = d_1 + d_2 + d_3[/tex]

[tex]d = -12 \widehat{j} - 4 \widehat{i} + 1 \widehat{j}[/tex]

[tex]d = -4 \widehat{i} - 11 \widehat{j}[/tex]

[tex]\texttt{Total Displacement} = \sqrt{4^2 + 11^2} = \sqrt{137} \approx 12 \texttt{ km}[/tex]

[tex]\texttt{Direction of Displacement} = \theta = \tan^{-1} \frac{11}{4} \approx 70^o \texttt{ south of west}[/tex]

[tex]\texttt{ }[/tex]

[tex]\texttt{ }[/tex]

Grade: High School

Subject: Physics

Chapter: Vectors

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Keywords: Local , Race , Driver , Road , Finish , Line , Displacement , Vector , Degree , North , West , South , Kilometres