how long would the day have to be in order that a person standing at the equator of the earth would see a bathroom scale that she is standing on read 0

Answer:

Rounded down to 2 digits, 0.10 grams.

Explanation:

6.77 - 3.37 = 3.4

3.4 / 35 = 0.09714285

The mass of one match in grams will be 0.097 g

The unitary method is a technique for solving a problem by first finding the value of  a single unit and then finding the necessary value by multiplying the single unit value,

mass of 35 matches = mass of box full of matches - mass of box itself

mass of 35 matches = 6.77 g - 3.37 g

                                  = 3.4 g

using unitary method , we can write

if 35 matches can have a mass of = 3.4 g

1 match can have a mass of =  3.4/35 g

                                                 = 0.097 g

The mass of one match in grams will be 0.097 g

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saitama is the strongest

Answer:

Part A

The power to turn on the lamp, ∑P = 3.36 W

Part B

The Resistor required is approximately 8.04 Ohms

Part C

The time for all the lights to go out is approximately 21.43 hours

Explanation:

The input voltage of the motor battery , V = 12 V

The capacity of the battery, Q = 6 Ah

The number of lamps in parallel = 8 lamps

The maximum voltage of each lamp,  = 3 V

The electric current in each lamp = 140 mA

The energy available in a battery, E = Q × V

For the battery, we have;

E = 6 Ah × 12 V = 72 Wh

The energy available in a battery, E = 72 Wh

Part A

The power used by the lamps, \(P_i\) = \(I_i\) × \(V_i\)

∴ The total power used by the lamp, ∑P = 8 × 0.14 A × 3 V = 3.36 W

The power to turn on the lamp, ∑P = 3.36 W

Part B

The resistance required, is given as follows;

Resistor required = (Battery voltage - Lamp voltage)/(The sum of bulb current)

∴ Resistor required = (12 V - 3 V)/(8 × 0.14 A)

The Resistor required = 8.03571429 Ohms

The Resistor required ≈ 8.04 Ohms

Part C

The time for all the lights to go out = The time for the lamps to use all the power available in the battery

The time for all the lights to go out, t = E/∑P

∴ t = 72 Wh/(3.36 W) = 21.4285714 h

∴ The time for all the lights to go out, t ≈ 21.43 h

The time for all the lights to go out = The time for the lamps to use all the power available in the battery = t ≈ 21.43 h

∴ The time for all the lights to go out ≈ 21.43 hours.

The separation d of the two slits is 9.23 x 10^-5 m

The problem involves a double slit experiment where a He-Ne laser of wavelength? = 600 nm shines through the double slit onto a screen located 1.00 m away from the slit. The distance on the screen between the m = 4 maxima and the central maximum of the two-slit diffraction pattern is measured and found to be 2.6 cm.

To find the separation d of the two slits, we need to use the formula for the distance between adjacent maxima in a double-slit diffraction pattern:

y = (mλL) / d

where y is the distance between adjacent maxima on the screen, m is the order of the maximum (m = 1 for the central maximum, m = 2 for the first maximum on either side of the central maximum, and so on), λ is the wavelength of the light, L is the distance from the slit to the screen, and d is the separation between the two slits.

We are given the values of y, m, λ, and L, and we need to solve for d. Rearranging the equation, we get:

d = (mλL) / y

Plugging in the values, we get:

d = (4 x 600 nm x 1.00 m) / 2.6 cm
d = 9.23 x 10^-5 m
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Answer:

The volume of an object is a measure of the amount of space occupied by that object

Explanation:

Answer: A student might use a graduated cylinder to measure volume of a chemical solution in milliliters

Explanation:

Volume is the quantity of three-dimensional space enclosed by a closed surface,an often quantified numerically using the SI derived unit, the cubic metre.

The distance covered by the object is given as,

Plug in the known values,

Thus, the distance covered by the object is 81 m.

Answer:

The formula for calculating the length change due to a temperature change is:

ΔL = α * L * ΔT

where α is the linear expansivity, L is the original length of the bar, and ΔT is the change in temperature.

So in this case, the length change of each bar would be:

ΔL = 1.0 x 10^-5 K^-1 * 3m * (40°C - 28°C)

Converting the temperatures to Kelvin (28°C = 28 + 273 = 301 K and 40°C = 40 + 273 = 313 K), we get:

ΔL = 1.0 x 10^-5 K^-1 * 3m * (313 K - 301 K)

ΔL = 1.0 x 10^-5 * 3 * 12

ΔL = 0.00036 m

So each bar will increase in length by approximately 0.00036 meters when the temperature changes from 28°C to 40°C. To allow for this increase in length, a safety gap of 0.00036 meters should be left between each bar.

The total energy contained in all the particles produced is 2.225 MeV.

The mass defect (Δm) of the neutron is equal to the sum of the mass of the proton and electron minus the mass of the neutron:

Δm = (1.0072 + 0.00055) u - 1.0088 u= 0.00095 u

Now, the energy released (E) is obtained by using the formula:

E = Δm × c²= 0.00095 u × (931.5 MeV/c²/u) × c²= 0.885925 MeV

To find the total energy contained in all the particles produced, add the rest mass energies of the proton and electron to the energy released:

E_total = E + (m_proton × c²) + (m_electron × c²)

= 0.885925 MeV + (1.0072 u × 931.5 MeV/c²/u) + (0.00055 u × 931.5 MeV/c²/u)

= 2.225 MeV

Therefore, the total energy contained in all the particles produced is 2.225 MeV.

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its c                                     tjrxjxfjzjzrjrzjrzjkxkrzizikxikskiskskioxi

Answer:

it's C velocity

Explanation:

Answer: Chlorophyll Breaking down.

Explanation: When it starts to get cooler the chlorophyll breaks down causing the pretty green color to change to brown gold and orange.

The true statements are:Jupiter's Great Red Spot is in the southern hemisphere.The fastest wind speed recorded in our solar system is on Neptune.

Among the given statements, only two are true. Jupiter's Great Red Spot, a massive storm, is indeed located in the southern hemisphere of the planet. The Great Red Spot is a prominent feature on Jupiter, visible as a giant swirling storm system. On the other hand, the fastest wind speed recorded in our solar system, reaching speeds of up to 2,100 kilometers per hour (1,300 miles per hour), is found on Neptune.

The strong winds on Neptune contribute to its dynamic atmosphere and the formation of features like the Great Dark Spot. The remaining statements about Pluto, Saturn's moon Enceladus, and Uranus are not true according to our current understanding.

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Answer: If the mass of the object is 178 kg: k = 9.44*10^-5 N/m

Answer for the mass being 82 kg is not complete, because G was not given.

Explanation:

If the mass of the object is 178 kg:

The mass of object (m) = 178 kg

Length of tunnel (l) = 2640 km

***The minimum displacement (its amplitude) of object from its mean position,

A = 2640/2 = 1320 km = 1.320 * 10^6 m

Mass of planet (M) = 4.48 * 10^24 kg

Its Radius (R) = 8.26 * 10^6 m

Gravitational constant (G) = 6.67259 * 10^-11 Nm^2/kg^2

Now, restoring force for given hormonic motion will be

Vector of F = -((GMm)/R^3) * x

Comparing with, vector of F = -k*x, we get

k = (GMm)/R^3

k = (((6.67259*10^-11)*(4.48*10^24)*178)/(8.26*10^6)^3)

k = ((5320.99017*10^(-11+24))/(563.559976*10^18))

k = 9.44*10^(13-18)

k = 9.44*10^-5 N/m

If the mass of the object is 82 kg:

The mass of object (m) = 82 kg

Length of tunnel (l) = 2430 km

***The minimum displacement (its amplitude) of object from its mean position,

A = 2430/2 = 1215 km = 1.215*10^6 m

Mass of planet (M) = 4.16 * 10^24 kg

Its Radius (R) = 7 * 10^6 m

Gravitational constant (G) not given in the photo

Now, restoring force for given hormonic motion will be

Vector of F = -((GMm)/R^3) * x

Comparing with, vector of F = -k*x, we get

k = (GMm)/R^3

k = ((G*(4.16*10^24)*82)/(7*10^6)^3)

Remember that when multiplying two values with exponents, you add the exponents together!

k = ((3.4112*10^26 * G)/(3.43*10^20))

Insert G to solve!

The rate of heat loss is 52.3 kW. The amount of oil needed to supply heat lost by conduction from the house over a winter is approximately 1,156 gallons.

To calculate the rate of heat loss from the house, we can use the formula

Q/t = kA(Tin - Tout)/L

where Q/t is the rate of heat loss, k is the effective thermal conductivity, A is the surface area of the house, Tin is the temperature inside, Tout is the temperature outside, and L is the thickness of the walls and ceiling.

The surface area of the house is

A = 6L² = 6(9.0 m)² = 486 m²

The effective thermal conductivity is given as

koff = 0.048 W/(mK)

The thickness of the walls and ceiling is given as

L = 18 cm = 0.18 m

Substituting these values into the formula, we get

Q/t = (0.048 W/(mK))(486 m²)((20°C) - (0°C))/(0.18 m) = 52,320 W = 52.3 kW

Therefore, the rate of heat loss from the house is 52.3 kW.

To calculate the amount of oil needed to supply the heat lost by conduction over the winter, we need to find the total energy lost over the 150 days. The total energy lost is

E = Qt = (52.3 kW)(24 h/day)(150 days) = 224,280 kWh

Since the heating system is 75% efficient, the amount of oil needed is:

oil = E/(Qcη) = (224,280 kWh)/(1.4 x 10^8 J/g)(0.75) = 1,156 gallons (rounded to 3 significant figures)

Therefore, the amount of oil needed to supply the heat lost by conduction over the winter is approximately 1,156 gallons.

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Answer:

4. The Earth's umbra only covers a part of the Moon causing a circular shadow to pass across it.

Explanation:

i took the quiz

Answer:

Potential energy

Explanation: Potential energy is represented as a stored energy.

The difference between the natural fibers and synthetic fibers is like synthetic fibers are produced using chemicals while, natural fibers are derived from plants and animals and are appreciated in the textile business for several factors.

The fibers that come from natural sources are known as natural fibers. The origins can range from zoological to botanical components. In other words, natural fibers are those that are obtained from plants and animals in their natural state. Wool, silk, hemp, cotton, and linen are a few examples of fabrics that naturally breathe.

Synthetic fibers are produced through a sequence of chemical processes, as their name suggests. These fibers are produced using a variety of chemical compounds rather than being derived from natural sources.

The creation of tiny molecules known as polymers is the process used to create synthetic, artificial, or man-made fibers. In most cases, raw materials and chemical compounds are used to extract polymers. Nylon, polyester, acrylic, and more are a few examples.

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A series RLC circuit has a 220 kHz resonance frequency. If  the resonance frequency of the capacitor value is doubled, the new resonant frequency is 155.58 kHz

The resonant frequency refers to the value of the frequency of the circuit when the impedance of the RLC becomes minimum. At the resonant frequency, the current flowing through the circuit reaches its peak value as R, L and C in the circuit behave as short-circuited components.

The resonant frequency of the series RLC circuit is given by

\(f = \frac{1}{2\pi } \sqrt{\frac{1}{LC} }\)

Now, the capacitance is doubled then the equation becomes

\(f = \frac{1}{2\pi } \sqrt{\frac{1}{L(2C)} }\)

Which can be rearranged and written as

\(f_{new} = \frac{1}{\sqrt{2} } (\frac{1}{2\pi } \sqrt{\frac{1}{LC} } )\)

\(f_{new} = \frac{f}{\sqrt{2} }\)

Therefore the new frequency is 220kHz/1.414 = 155.58kHz

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Answer:Deforestation refers to the decrease in forest areas across the world that are lost for other uses such as agricultural croplands, urbanization, or mining activities. Greatly accelerated by human activities since 1960, deforestation has been negatively affecting natural ecosystems, biodiversity, and the climate. The UN’s Food and Agriculture Organization estimates the annual rate of deforestation to be around 1.3 million km2 per decade.

Explanation:

The negative effect of deforestation on the environment is desertification. The correct option is B.

Desertification is the process by which fertile land becomes desert, typically as a result of drought, deforestation, and inappropriate agriculture or land use practices. It occurs when land that was once able to support vegetation and life becomes increasingly dry, barren, and unable to sustain crops, livestock, or human populations. This can be due to natural causes such as prolonged droughts, but it is often exacerbated by human activities such as deforestation, overgrazing, and soil degradation. Desertification can have devastating effects on the environment, leading to soil erosion, loss of biodiversity, and reduced productivity of the land. It can also cause social and economic problems, such as displacement of people, food shortages, and conflicts over resources.

Here in the question,

Deforestation is the clearing of trees and other vegetation from an area, leading to the loss of habitat and biodiversity, and disruption of water cycles. It can also cause soil erosion, which can result in the depletion of soil nutrients, reduced productivity, and eventually lead to desertification. Additionally, deforestation contributes to climate change by releasing carbon dioxide into the atmosphere, which can cause global warming and other environmental problems. Habitat restoration, soil production, and urbanization are not negative effects of deforestation but can be impacted by it.

Therefore, The correct answer is B i. e Desertification.

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Answer:

Yes! Thinking about it graphically a position vs time graph models meters per second in most cases, making every point on the line have the units m/s. If we want the find the slope we are finding the change between each point and those units would change to m/s/s or m/s^2 giving us the same units for acceleration. Simply put, slope of a velocity graph gives us acceleration.

Explanation:

Answer:

0.5

Explanation:

Two resistors with resistances of 2 ohms and 4 ohms, respectively, are connected in series with a battery. The current through the 2 ohms resistor is 2A. How would one find the current through the 4 ohms resistor?

I = V/R we get I = 10/ 200 or .05 amps.

Answer:

Hope this solution helps you

Explanation:

\(net \: force \: = \sqrt{ {6 }^{2} + {3}^{2} + 2 \times 3 \times 6 \cos(90) } = 6.7 N\)

The pressure in the gas at that point is equal to the initial pressure, 100 kPa.

To expand adiabatically, there must be no heat transfer involved. Adiabatic expansion means that no heat is transferred between the gas and its surroundings; this means that if we double the volume of our gas, nothing should change in terms of temperature as long as there is no heat transfer to or from our system during expansion.

Since we're starting out with a monatomic ideal gas, we know that its entropy is going to stay constant throughout this process, so the ideal gas law gives us a relationship between pressure, volume, and temperature: PV = nRT

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The proper order of structures through which light must pass in order to perceive and image is cornea, aqueous humor, lens, vitreous humor, retina.

These are the five main structures of the human eye that enable vision, including light perception and imaging. Let's delve into each of these structures.

Cornea: The clear, protective outer layer of the eye is the cornea. The cornea has two purposes: to shield the inner eye from harm and to help focus light on the retina at the back of the eye.

The cornea's curved shape bends light waves as they enter the eye, assisting in their concentration.

Aqueous humor: This is a liquid that flows throughout the front of the eye, nourishing and removing waste from its surrounding tissues.

It aids in the maintenance of normal eye pressure, and if this pressure becomes too high, it can lead to glaucoma.

Lens: The lens' job is to concentrate light onto the retina. It's a transparent structure with a biconvex (lens-like) shape that varies in thickness.

It is supported by ciliary muscles that allow it to alter shape when we focus on things at different distances.

Vitreous humor: This gel-like substance fills the eye's posterior (rear) cavity, providing it with structural stability and helping it to maintain its form. It also assists in light refraction.

Retina: This is a thin layer of tissue lining the rear of the eye. The retina's photoreceptor cells, or rods and cones, are sensitive to light.

The retina converts light energy into neural signals that are transmitted to the brain via the optic nerve, which is located behind the eye. The brain translates these signals into images, allowing us to see.

What we see when we open our eyes is formed by light. In order to perceive an image, light must pass through a series of structures in the eye.

The cornea, aqueous humor, lens, vitreous humor, and retina are the five main structures of the human eye that enable vision, including light perception and imaging.

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The value of force is 1.7 × 10⁻³ N, with the direction opposite to that of the bat's motion.

When an object collides with another object, they exchange energy. For example, a baseball and bat collision or a car collision. When two objects collide, the force of the collision has to be equal on both sides of the collision according to Newton's Third Law. So, to find the value of force, we will apply the equation:

F = ΔP / ΔT

where F is the force, ΔP is the change in momentum, and ΔT is the time of collision. The equation represents the impulse momentum theorem.

Now, let's apply the given values to the above equation.

Final momentum (p2) = mass × final velocity (v2)

p2 = 0.15 kg × (-50 m/s)

p2 = -7.5 kg.m/s

Initial momentum (p1) = mass × initial velocity (v1)

p1 = 0.15 kg × (40 m/s)

p1 = 6 kg.m/s

Change in momentum (ΔP) = p2 - p1

ΔP = -7.5 kg.m/s - 6 kg.m/s

ΔP = -13.5 kg.m/s

Time of collision (ΔT) = 8.0 × 10³ s

Now, putting the values of ΔP and ΔT in the equation of impulse momentum theorem, we get:

F = ΔP / ΔT

F = -13.5 kg.m/s ÷ 8.0 × 10³ s

F = -1.7 × 10⁻³ N

Thus, the value of force is 1.7 × 10⁻³ N, with the direction opposite to that of the bat's motion.

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The chemical that makes up genetic material is called nucleic acid. Specifically, DNA deoxyribonucleic acid and RNA ribonucleic acid are the two types of nucleic acids that store and transmit genetic information in living organisms.

Acids are substances that have a pH less than 7 and can donate a hydrogen ion (H+) to a solution. They are characterized by their sour taste and their ability to dissolve metals, react with bases, and change the color of indicators. Acids can be categorized as strong or weak based on their ability to ionize in water. Strong acids ionize completely in water, while weak acids only partially ionize.

Ionization refers to the process of converting a neutral atom or molecule into an ion by adding or removing one or more electrons. This can occur through a variety of methods, such as heating, chemical reactions, or exposure to radiation. When an atom loses one or more electrons, it becomes positively charged and is called a cation.

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Answer:

Actually for people in K12 (me) the answer is, "Increase the distance between the two objects"

Explanation:

I used the answer above me and got it wrong

:))

Answer: increase the distance between the two objects

Explanation: its the correct one trust me