Do machines create less work? Example: pulley system

Answer:

Here is some useful background facts...

Explanation:

They include mercury, lead, sulfur dioxide, nitrogen oxides, particulates, and various other heavy metals. Health impacts can range from asthma and breathing difficulties, to brain damage, heart problems, cancer, neurological disorders, and premature death

Answer:

Coal can hurt the environment severely. The mining of coal is bad for the ground and you pollute the air when you burn the coal.

Coal is also unhealthy for your lungs. If you burn coal and breathe in the smoke you can damage your lungs, especially if you are constantly around that smoke.

San Andreas Fault--Normal Fault is associated correctly.

This is option 1.

San Andreas Fault is a right-lateral strike-slip fault that runs approximately 800 miles (1,300 km) through California in the western United States. It forms the boundary between the Pacific Plate and the North American Plate, extending from the San Francisco Bay Area to the Salton Sea near the Mexico–United States border. It is one of the most significant geological features on the planet, and it is also one of the most active, with frequent earthquakes of varying sizes being reported in the region.

A normal fault is a type of fault that occurs when the rocks in the Earth's crust are pulled apart by tension. A normal fault occurs when the block of rock above the fault line falls downwards relative to the block of rock below the fault line, which is raised upwards.

So, the correct answer is option 1

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Answer:

70 kg = 7e+7

Explanation:

multiply the mass value by 1e+6

Answer:

If you are simply looking for the X component then the most applicable formula from the choices given is Tx + Ux+ Vx. This means that you will add all x-components. For example: If a man walking along the x-axis walks 10 meters to the right, 5 back and 2 meters forward, what is the resultant vector?

Answer:

C

Explanation:

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Answer:

i think a and c

Explanation:

Answer:

there it is fella

And that's according to ma observation

The diameter of the object is approximately is 11.33 cm.

To determine the object location for which the size of the reflected image is three-fourths the object's size, we can use the concept of spherical mirrors and the mirror equation.

The mirror equation is given by:

1/f = 1/do + 1/di

Where:

f is the focal length of the mirror

do is the object distance (distance of the object from the mirror)

di is the image distance (distance of the image from the mirror)

In this case, the mirror is a spherical mirror, and since the size of the reflected image is specified, we can use the magnification equation:

m = -di/do

Where:

m is the magnification

di and do have the same sign when the image is upright and opposite signs when the image is inverted

Let's solve for the object distance (do) when the magnification (m) is three-fourths (3/4) and the diameter of the object (which is the same as the diameter of the image) is 8.50 cm.

We know that the diameter of the image (Di) is related to the diameter of the object (Do) by the equation:

Di = m * Do

Given that Di = 8.50 cm and m = 3/4, we can substitute these values to find the diameter of the object:

8.50 cm = (3/4) * Do

Now, let's solve for Do:

Do = (8.50 cm) / (3/4)

Do = (8.50 cm) * (4/3)

Do ≈ 11.33 cm

So, the diameter of the object is approximately 11.33 cm.

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The solar system shows the planets in their orbits around the sun in this order: Mercury, Venus, Earth with Moon, Mars, Jupiter, Saturn. Fixed stars are around the outside of the orbit of Saturn.

Explanation:

Aristarchus of Samos was an ancient Greek astronomer and mathematician who presented the first known heliocentric model that placed the Sun at the center. So I had to choose the choice that was most similar to that.

Answer:

E = h ν = h c / λ

E = (6.63E-34 J-s * 3.00E8 m/s) / 757.7E-9 m

E = 2.62E-19 J

Note 1 eV = 1.60E-19 J

ν = c / λ = 3.00E8 / 110.9E-9 = 2.71E15 / sec

How much energy (in joules) does a photon of wavelength 757.7 nm have.The energy of the photon with a wavelength of 757.7 nm is 2.61 x 10^-19 J. The energy of a photon is given by the formula: E = hc/λwhere E is the energy, h is Planck's constant, c is the speed of light, and λ is the wavelength of the photon.

Substituting the given values, we get: E = (6.626 x 10^-34 J s)(3.00 x 10^8 m/s)/(757.7 x 10^-9 m)E = 2.61 x 10^-19 JTherefore, the energy of the photon with a wavelength of 757.7 nm is 2.61 x 10^-19 J. What is the frequency (in Hz) of light that has a wavelength of 110.9 nm  The frequency of light with a wavelength of 110.9 nm is 2.70 x 10^15 Hz. The frequency of light is given by the formula:f = c/λwhere f is the frequency, c is the speed of light, and λ is the wavelength of the light.

Substituting the given values, we get:f = (3.00 x 10^8 m/s)/(110.9 x 10^-9 m)f = 2.70 x 10^15 Hz Therefore, the frequency of light with a wavelength of 110.9 nm is 2.70 x 10^15 Hz. How much energy (in joules) does a photon of wavelength 757.7 nm have.The energy of the photon with a wavelength of 757.7 nm is 2.61 x 10^-19 J. The energy of a photon is given by the formula: E = hc/λwhere E is the energy, h is Planck's constant, c is the speed of light, and λ is the wavelength of the photon.

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Answer:

A. 17V

Explanation:

V = IR

680Ω × 0.025A = 17V

Cold climate favors rapid mechanical weathering, since the cold seasons cause the rock to contract.

Mechanical weathering, sometimes referred to as physical weathering and disaggregation, causes rocks to break down. Water, whether liquid or solid, is usually present during mechanical weathering. For instance, liquid water can seep through fractures and fissures in rock.

Cold climates promote mechanical weathering because they force rocks to contract and compress during the colder months. The rocks degrade and break at higher temperatures. Temperature fluctuations cause the expansion and contraction of rock (with cold). As this continues repeatedly, the structure of the rock deteriorates. It breaks down over time.

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ANSWER

False.

EXPLANATION

In radioactive decay (or nuclei decay), an unstable nucleus emits radiation into a nucleus that is table and has less energy and a lower mass.

Therefore, nuclei decay from a less stable form to a more stable form.

The answer is false.

The required focal length of the contact lenses for the farsighted person to read a book at a distance of 10.1 cm is approximately 9.52 cm. The focal length of the contact lenses that would allow a farsighted person with a near point of 166 cm to read a book at a distance of 10.1 cm is approximately 10.8 cm.

To find the focal length of contact lenses for a farsighted person with a near point of 166 cm to read a book at a distance of 10.1 cm, we can use the lens equation:

1/f = 1/do + 1/di

Where f is the focal length of the lenses, do is the distance of the object (the book) from the lenses, and di is the distance of the image (the book) from the lenses.

Since the person is farsighted, their eye cannot focus on nearby objects, so we can assume that the lenses will act as a converging lens to bring the book's image closer to their eye. Therefore, the value of di will be negative.

Let's plug in the given values:

do = 10.1 cm
di = -166 cm
f = ?

1/f = 1/do + 1/di
1/f = 1/10.1 cm + (-1/166 cm)
1/f = 0.0988 - 0.0060
1/f = 0.0928
f = 10.8 cm

Therefore, the focal length of the contact lenses that would allow a farsighted person with a near point of 166 cm to read a book at a distance of 10.1 cm is approximately 10.8 cm.
To correct farsightedness, converging lenses are used. The lens equation can help us find the focal length of the contact lenses needed:

1/f = 1/do + 1/di

where f is the focal length, do is the object distance (distance from the book), and di is the image distance (near point of the person).

In this case, do = 10.1 cm, and di = 166 cm. Plugging these values into the equation:

1/f = 1/10.1 + 1/166

Now, we solve for the focal length (f):

1/f = 0.09901 + 0.006024
1/f = 0.105034
f = 1/0.105034
f ≈ 9.52 cm

Therefore,The required focal length of the contact lenses for the farsighted person to read a book at a distance of 10.1 cm is approximately 9.52 cm.

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Gravitational force -an attractive force that exists between all objects with mass

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Fields exist between objects even if objects don't have any contact because gravity pulls them toward each other.

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The property of a transverse wave that stays the same even as the wave's energy and other properties change is the wavelength.

The correct option to the given question is option a.

The wavelength is the distance between two successive points of the wave that are in phase. As the wave's energy and amplitude change, the distance between two successive points of the wave that are in phase remains the same.

This is because wavelength is determined by the frequency of the wave and the speed of propagation. The frequency of the wave is the number of cycles of the wave that occur in one second, while the speed of propagation is the rate at which the wave travels through a medium.

If the frequency of the wave and the speed of propagation remain the same, then the wavelength will also remain the same even as the wave's energy and other properties change. This property is known as the characteristic of the wave.The amplitude is the maximum displacement of a point on the wave from its rest position. The frequency is the number of cycles of the wave that occur in one second. The rest position is the position of the medium when it is not disturbed.

Hence, wavelength of a transverse wave remains same even as the wave's energy and other properties change.

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The height at which the seagull was flying is 82.45 m.

The height of motion or maximum height in projectile motion occurs when the object reaches a vertical velocity of zero magnitudes.

The height at which the seagull was flying is calculated as follows;

v² = u² - 2gh

where;

0 = u² - 2gh

2gh = u²

h =  u²/2g

h = (40.2²) / (2 x 9.8)

h = 82.45 m

Thus, the height at which the seagull was flying is 82.45 m.

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Grow the peanut and 105 ways of preparing it for human consumption

Growing Peanuts:

   Climate and Soil Requirements:

       Peanuts require a warm climate with temperatures between 70°F and 90°F (21°C to 32°C).

       They need well-drained soil with a pH between 5.8 and 6.2.

   Seed Selection:

       Choose healthy, disease-free peanut seeds from a reliable source.

   1)Preparing the Soil:

       Clear the area of weeds and debris.

       Loosen the soil to a depth of 6 to 8 inches (15 to 20 cm) using a garden fork or tiller.

       Incorporate organic matter, such as compost or well-rotted manure, into the soil.

2)   Planting:

       Plant peanuts after the last frost date when the soil temperature reaches at least 65°F (18°C).

      3) Dig shallow furrows around 1 to 2 inches (2.5 to 5 cm) deep and space them about 18 to 24 inches (45 to 60 cm) apart.

       Place peanut seeds 2 inches (5 cm) apart within the furrows.

       Cover the seeds with loose soil.

 4)  Watering and Care:

       Water the peanuts regularly, providing around 1 inch (2.5 cm) of water per week.

       Mulch around the plants to conserve moisture and suppress weeds.

       Monitor for pests and diseases, such as aphids, caterpillars, or leaf spot, and take appropriate action.

   Harvesting:

       Peanuts are ready for harvest when the leaves start to turn yellow.

       Carefully dig up the entire plant, taking care not to damage the pods.

       Shake off the excess soil and hang the plants in a well-ventilated area to dry for about two to three weeks.

       Once the shells are dry and the peanuts rattle inside, they are ready for further processing.

105 Ways to Prepare Peanuts for Consumption:

   Peanut Cl

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The difference between longitudinal and transverse waves is with respect to their mediums.

Transverse waves and longitudinal waves are two different forms of waves that differ in the direction that the medium is moving. When the medium's vibration is parallel to the wave direction, a transverse wave is produced. At a right angle to the wave's direction of travel, amplitude is recorded. When the medium being employed vibrates parallel to direction of wave, longitudinal waves are produced.

Amplitude is measured at a zero-degree angle to the wave's travel direction. Transverse waves include crests and troughs, whereas longitudinal waves have compressions and rarefactions. While longitudinal waves can move through fluids like liquids and gases, transverse waves need a relatively rigid medium to do so.

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Answer:

exoplanets is any planet beyond our solar system.

If the total momentum of the insects is zero, this means all of the insects are at rest or are moving in opposite of each other. Same if the total kinetic energy is zero.

Momentum is the quantity of motion which is multiplied by the amount of matter moved i.e., mass and the velocity at which it moves. Because, the object is in motion, it is a vector quantity, it has both direction and magnitude. It is determined by the product of the object's mass and the velocity of object.

If the total momentum of the insects is zero, this could mean anything of the two things. Either, all of the insects are at rest or an equal amount of insects are moving in opposite direction of each other which cancels out the total momentum of the insects.

If the total kinetic energy of the insects is zero, this means either all of the insects are at rest or an equal amount of insects are moving in opposite direction of one another which results into canceling out the energy.

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Answer:

4.1 billion

Explanation:

Answer:

60 cm

Explanation:

Torque = τ = rFsinΘ

In this case Θ = 90, so sinΘ = 1

x = distance from fulcrum of the 1 kg mass

(2 kg)(g)(0.30 m) = (1 kg)(g)(x)         because the beam is in equilibrium

0.60 N·m = (1 N)x

x = 0.60 m = 60 cm

Although a magnet can change the direction of travel of an electron beam, it cannot change its charge. The charge of an electron is a fundamental property and is not affected by magnetic fields.

A magnet is an object or material that produces a magnetic field, which can exert attractive or repulsive forces on other magnets or magnetic materials. It has a north pole and a south pole with opposite magnetic polarities. Magnets can be natural or artificial, and they are used in numerous applications like electric motors, generators, speakers, magnetic storage devices, and medical imaging machines. They play a crucial role in various industries and scientific fields where the manipulation of magnetic fields is necessary.

They are also commonly used in magnetic compasses for navigation and in various industrial and scientific applications where the manipulation of magnetic fields is required.

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Answer:

D

Explanation:

Trees are obviously effected from deforestation.

Pollution effects the things trees need to grow (water, air).

Reduction removes parts of the tree, some parts being needed.

Answer: D

Explanation:Trees are obviously effected from deforestation.

Pollution effects the things trees need to grow (water, air).

Reduction removes parts of the tree, some parts being needed.

Einstein's special theory of relativity explains that the electric and magnetic fields are both can formulate together in mathematically.

It is given Einstein's special theory of relativity.

It is find the Einstein's special theory of relativity explains the perpendicular behavior of moving charges without recourse to invoking the concept of a magnetic field.

As we know that one charge creates a field and its that field that actually exerts a force on the other charge. Here we it gives the relationship of two fields like electric field and magnetic field and gives the formula for electromagnetic objects.

Special relativity fixes the problem by the points that the magnetic force in one frame of reference easily be an electric force in other and also some of the combination of them in a frame.

Thus, Einstein's special theory of relativity explains that the electric and magnetic fields are both can formulae together in mathematically.

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Answer:

5 m/s

Explanation:

Mass of the boy + scooter system =  35 kg

Kinetic Energy =  437.6 J

437.6 = \(\frac{1}{2} 35 {v}^2\)

25.0057143 = \(v^{2}\)

v = 5 m/s

Since the resistors are in series, the equivalent resistance is the sum of the resistances:

Now, to find the current, let's divide the voltage by the total resistance:

The current through each resistor is the same because they are in series: 1.5 A.

To find the most powerful resistor, let's analyze the formula for the power in a resistor:

We can see that the greater the resistance, the greater the power, therefore the most powerful resistor is the 30 ohms resistor.

A neutron star is made almost entirely of neutrons, relatively large particles that have no electrical charge.

A neutron star is made almost entirely of neutrons, relatively large particles that have no electrical charge. Neutron stars are incredibly dense celestial objects that form when massive stars undergo a supernova explosion. During this explosion, the outer layers of the star are ejected into space, leaving behind a dense core composed primarily of neutrons.

Neutrons are subatomic particles that, along with protons, make up the nucleus of an atom. In most atoms, neutrons and protons are bound together by the strong nuclear force. However, in a neutron star, the intense gravitational pressure is so strong that it overcomes the repulsive electromagnetic force between protons, causing the protons to merge with electrons through a process called electron capture. As a result, most of the protons in a neutron star are also converted into neutrons.

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A patient is referred to a physical therapist for treatment of chronic neck pain. During the examination, the therapist notices that the patient has a marked ulnar drift.

Step 1: The physical therapist will assess the patient's neck pain, range of motion, strength, and posture to develop an appropriate treatment plan.

Step 2: Since ulnar drift is observed, the therapist will also evaluate the patient's hand and wrist function, as ulnar drift is a deformity typically seen in the hands.

Step 3: The treatment plan will address both the chronic neck pain and the ulnar drift, using techniques such as manual therapy, stretching, strengthening exercises, and postural education.

Step 4: The physical therapist may recommend adaptive equipment or splints to support the patient's hand and wrist and help reduce ulnar drift progression.

Step 5: Regular follow-ups with the physical therapist will be important to monitor progress, adjust the treatment plan as needed, and ensure the patient is effectively managing their neck pain and ulnar drift.

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