Which object has a net force of –5 N down?

Explanation:

this might help you i think so

Answer:

Exercising is not only good for their physical and mental health, but also helps them to socialise with other dogs and puppies, which is crucial to their ...

Explanation:

Answer:

D. It is easy to copy.

Explanation:

It is not B, or A, nor C.

Answer:D

Explanation:

Answer:

2-3-1-4

Explanation:

First you will need an energy source so 2 is the first step.

Then the lead and lead oxide are reformed during re-charge so 3 is the second step.

The battery is back in operation when Lead dissolves in acid so 1 is the third step.

Battery produces electrons so 4 is the final step.

Answer:

A. Gradulated Cylinder

A graduated cylinder is a tool that should be used to measure the mass of an object, first by measuring the volume of the substance and then calculating the mass by using the density, therefore the correct answer is option A.

A unit of measurement is a specified magnitude of a quantity that is established and used as a standard for measuring other quantities of the same kind. It is determined by convention or regulation.

Any additional quantity of that type can be stated as a multiple of the measurement unit.

stopwatch is used to measure the time period.

scale is used to measure the length.

A thermometer is a tool used to measure the temperature.

The correct response is option A because a graduated cylinder should be used to determine an object's mass by first determining the substance's volume and then calculating the mass using a density.

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To cancel the polarization of a NaLi molecule, an electric field of magnitude 5.33 V/Å needs to be applied along the molecular axis in the direction opposite to the polarization.

To double the polarization of a NaLi molecule, an electric field of magnitude 10.66 V/Å needs to be applied along the molecular axis in the direction of the polarization.

The polarization of a NaLi molecule is due to the difference in electronegativity between sodium and lithium. Sodium is more electropositive than lithium, which means that it has a stronger affinity for electrons.

This means that the electrons in the NaLi molecule are more likely to be found closer to the sodium atom than the lithium atom.

The electric field will exert a force on the electrons in the NaLi molecule, trying to pull them away from the sodium atom and towards the lithium atom. If the electric field is strong enough, it will be able to cancel the polarization of the molecule.

The magnitude of the electric field needed to cancel the polarization of a NaLi molecule can be calculated using the following formula:

E = 2qd / e

where:

E is the magnitude of the electric field

q is the charge of an electron

d is the inter-atomic distance

e is the permittivity of free space

In this case, the magnitude of the electric field needed to cancel the polarization of a NaLi molecule is:

E = 2 * (1.602 * 10^-19 C) * (3.0 * 10^-10 m) / (8.854 * 10^-12 C^2 / N m^2) = 5.33 V/Å

To double the polarization of a NaLi molecule, the electric field would need to be twice as strong. This means that the magnitude of the electric field would need to be 10.66 V/Å.

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The other responses are all essentially correct, but I'd want to offer a somewhat different perspective. This one is a little more technical, but it offers an intriguing perspective, in my opinion.

One of the first things I would mention is the fact that orbits are ellipses rather than circles. The phrases apogee and perigee are used because of this. The apogee is the orbit's highest point, while the perigee is its lowest point, giving the shape of an ellipse. A circular orbit is just an ellipse with the same apogee and perigee. However, apogee and perigee are not the crucial variables from an orbital perspective; rather, apoapsis and periapsis are.

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so, 444 eggs would have been released in 37yrs

If a woman releases one egg every month for 37 years, then she releases 444 eggs.

A year is a unit of time that is commonly used to measure the period of time it takes for the Earth to make one revolution around the Sun.

The time it takes for the Earth to complete one orbit around the Sun is approximately 365.24 days, which is why a year is usually defined as 365 days, with an extra day added every four years (in what's called a leap year) to account for the fractional part of the year. This is known as the Gregorian calendar, which is the most widely used calendar system in the world.

A year is also commonly used to refer to the period of time it takes for an event or cycle to repeat, such as the school year, fiscal year, or a company's financial year.

There are 12 months in a year, and they are:

January

February

March

April

May

June

July

August

September

October

November

December

Each month has either 30 or 31 days, except for February which has 28 days (or 29 days in a leap year). The number of days in a month determines the number of days in a year, which is why a year typically has either 365 or 366 days, depending on whether or not it is a leap year.

Here in the question,

37 years is equivalent to 37 x 12 = 444 months (since there are 12 months in a year).

To calculate this, we simply multiply the number of eggs released each month (which is one) by the total number of months:

Number of eggs released = 1 egg/month x 444 months

Number of eggs released = 444 eggs

Therefore, over 37 years, a woman releases 444 eggs.

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You can change the volume, pressure, or temperature of a gas.

Change the volume of a gas to raise or lower the temperature. As the temperature increases, the gas expands and increases in volume. Conversely, as the temperature decreases, the volume of the gas decreases. As the temperature increases, the volume of the gas increases. Conversely increasing the pressure will decrease the volume of the gas.

Reducing the gas volume increases the gas pressure. An example of this is when gas is trapped inside a cylinder by a piston. When the piston is pushed in, the volume occupied by the gas decreases, so there is less room for gas particles to move. The relationship between pressure and volume Boyle's Law. As the pressure of a gas increases the gas particles are pushed together thus decreasing the volume of the gas.

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The microbiologist is studying the nucleoid region of the cholera bacteria, which means that she is studying a region within the bacterium that contains nucleic acids.

This region is important because it is where the bacterial DNA is located and where many essential genetic processes occur. The nucleoid region does not contain R plasmids, nuclear membrane, or peptidoglycan, as these are located in different parts of the bacterial cell. It's important to note that the nucleoid region does not include other components like R plasmids, the nuclear membrane, or peptidoglycan. These elements are found in different parts of the bacterial cell. R plasmids are extrachromosomal genetic elements that can confer antibiotic resistance, while the nuclear membrane is a feature of eukaryotic cells and not present in prokaryotic bacteria. Peptidoglycan, on the other hand, is a structural component of the bacterial cell wall, which surrounds the nucleoid region.

By focusing on the nucleoid region, the microbiologist aims to gain insights into the organization, replication, transcription, and other essential genetic processes occurring within the bacterial DNA, contributing to a better understanding of cholera bacteria and potential avenues for research or treatment.

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The velocity of the load right after the brake of the lorry is suddenly applied at t = 6 s, is 16.9 m/s.

The velocity of the load is determined from the ratio of the load displacement and time taken.

Mathematically, the formula for displacement is given as;

Displacement = change in displacement / change in time

The displacement of the load at 6 seconds is calculated as;

D = area under the curve

D = (15 s - 6 s ) x (20 m/s - 0 m/s)  +  ¹/₂ (19 s - 15 s ) x (20 m/s - 0 m/s)

D = 180 m  + 40 m

D = 220 m

The velocity of the load;

v = ( 220 m ) / (19 s - 6 s )

v = 16.9 m/s

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If light moves through an optical medium at a speed of 2.5 x 108 m/s, the media's refractive index is 1.2.

The material's refractive index (n) may be defined as -

Refractive Index (n) = Light's speed in a vacuum (C) divided by its light speed in a medium (V)

Therefore, n = C/V  

Given that the speed of light in the medium is V=2.5×10⁻⁸m/s

and the speed of light in the vacuum is C=3.0×10⁻⁸m/s

Therefore, the equation gives us n = C/V

n=3.0×10⁻⁸m/s÷2.5×10⁻⁸m/s,

which equals n=1.2 (Refractive index of the medium).

Refractive index: The refractive index, sometimes called the refraction index in optics, is a dimensionless quantity that describes how efficiently an optical material bends light.

Light: light is the organic substance that activates vision and makes things visible

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Explanation:

Acceleration is the rate of change of velocity with time. When acceleration increases a body moves a faster velocity.

A vehicle at time 100s will have a faster velocity compared to one at t = 20s

Answer: 150 j

Explanation:

3x5x10=150 j

gravity equals 10

Due to her location within it, this is not possible. It can only be seen if the sky is clear and there is little to no light pollution, and as a result, environmental changes occur.

The Milky Way is crammed with anything between 100 billion and 400 billion more stars, many of which have their own planets. The Milky Way is so named because it appears from Earth like a streak of milk that has been spilled across the sky.

A galaxy is a sizable group of stars gathered in one place in the universe. The Milky Way galaxy, which contains the sun, Earth, and seven other planets, is where our solar system is located. Similar to our sun, the Milky Way is home to hundreds of billions of stars.

The Milky Way makes it possible to examine a medium-sized spiral galaxy's functioning in great detail.

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The rock was launched in the upward direction with an initial velocity of 8.58 m/s.The speed of the rock 4.5 seconds after launch is  35.52 m/s.

Given:

Time after launch (t) = 2.1 s

Rising rate (v) = 12 m/s

(a) By using the equation of motion v = u + at

where,

v denotes the final velocity, u initial velocity, a is the acceleration, and t is the time.

v = u + at

12= u + (9.8) × 2.1 s

u = 12 - (9.8 m/s² × 2.1 s)

u = 12 - 20.58

u = -8.58 m/s

The negative sign indicates that the rock was launched in the upward direction with an initial velocity of 8.58 m/s.

(b) To calculate the speed 4.5 seconds after launch,

v = u + at

v = -8.58 + (9.8) × 4.5 s

v = 35.52 m/s

The speed of the rock 4.5 seconds after launch is  35.52 m/s.

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The magnitude of the electric field will be 64.38 V/m. Mathematically, the electric field is found as the ratio of the voltage per unit length.

A physical field that surrounds electrically charged particles and exerts a force on all other charged particles in the field, either attracting or repelling them, is referred to as an electric field.

The magnitude of the electric field in terms of the pointing vector for this wave  is found as;

\(\rm E_{MAX} = \sqrt{S \times c \times \mu_0 }\)

Where,

E is the electric field

c is the speed of light

\(\mu_0\) is the permeability

On Putting the given data ;

\(\rm E_{MAX} = \sqrt{11.0 \times 3 \times 10^8 \times 4 \times \pi \times 10^{-7}} \\\\\ \rm E_{MAX} =\sqrt{4144.8} \\\\ E_{MAX} =64.38 \ V/m\)

Hence, the magnitude of the electric field will be 64.38 V/m.

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The equation that has four roots is: (x-4)(x+2)(x-7)=0

To find where the function intersects the x-axis, set f(x)=0 and solve the equation for x. If the function is a linear function of degree 1, f(x)=mx+b and the x-intercept is the root of the equation found by solving the equation for x.

The equation that has four roots is: (x-4)(x+2)(x-7)=0

This is a polynomial equation of degree 3, and it has 4 roots x = 4, x = -2, and x = 7.

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Answer:

The weight of an object at the poles is more than the weight of the object at the equator

Explanation:

The shape of the Earth is an ellipsoid such that the distance from the North and South poles to the Earth's center, R₁, is less than the distance from the Equator to the center of the Earth, R₂

The weight of an object is given by the universal gravitational law as follows;

\(Weight = F_{gravity} =G\times \dfrac{M \cdot m}{R^{2}}\)

Where;

\(F_{gravity}\) = The force of gravity = The weight of an object

G = The universal gravitational constant

M = The mass of the Earth

m = The mass of the object

R = The radius of the Earth

Where R₁ < R₂, we have;

The weight at the Poles, W₁ = \(G\times \dfrac{M \cdot m}{R_1^{2}}\)

The weight at the Equator, W₂ = \(G\times \dfrac{M \cdot m}{R_2^{2}}\)

We have;

\(\left(G\times \dfrac{M \cdot m}{R_1^{2}} \right) > \left(G\times \dfrac{M \cdot m}{R_2^{2}} \right) \because R_1 < R_2\)

Therefore, the weight of an object at the poles, W₁, is more than the weight of the object at the equator, W₂

The wood will sink lower in the water when the container is sealed and pressurized above atmospheric pressure.  

When the container is sealed and pressurized above atmospheric pressure, the pressure inside the container increases. According to Boyle's Law, the volume of a gas is inversely proportional to its pressure at a constant temperature. This means that as the pressure inside the container increases, the volume of the air trapped in the pores of the wood decreases.

This results in a decrease in the buoyant force acting on the wood, which causes the wood to sink lower in the water. Therefore, the correct answer is "it sinks lower in the water." This phenomenon is also observed in the diving and submarine industry, where pressure changes affect the buoyancy of submerged objects.

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Full Question: a piece of unpainted porous wood barely floats in an open container partly filled with water. the container is then sealed and pressurized above atmospheric pressure. what happens to the wood?

correct: your answer is correct. explain your answer.

Answer:

It should be 1,029.105 m³

But I think you can ignore the 105 because it essentially doesn't make a difference

Answer:

(B) Parachutes

Explanation:

Air resistance works to slow down trains and airplanes, so it isn't desirable.  Air resistance also causes pendulums to slow and stop.

Parachutes need air resistance to slow a person's fall.  So air resistance is desirable here.

Answer:

B i answered it it it

Explanation:

Answer:

C. answer pa brailest need lang po please

D. Resource Supply this would be directly affected first then the rest would follow after a period of time.

We can calculate the atmospheric pressure at a given depth below sea level using the formula:

P = P0 * e^(-gd/RT)

Where:

- P is the pressure at depth d

- P0 is the pressure at the surface (105 N/m^2)

- g is the gravitational constant (9.8 m/s^2)

- d is the depth below sea level

- R is the ideal gas constant (8.314 J/mol*K)

- T is the atmospheric temperature (288 K or 15°C)

For example, at a depth of 100 meters below sea level, we can plug into the formula:

P = 105 * e^(-9.8*100/8.314*288)

= 105* 0.836

= 87.8 N/m^2

So at a depth of 100 meters below sea level, the atmospheric pressure would be approximately 88 N/m^2, which is 16 N/m^2 less than at the sea level surface.

As depth increases, the atmospheric pressure will decrease exponentially according to this formula. The further below sea level, the lower the pressure will become.

Hope this helps! Let me know if you have any other questions.

The standard atmospheric pressure at sea level is defined as 101,325 Pa. As divers know, a depth of **10 meters** in water (density = 1 g/cm³) provides an additional atmosphere of pressure. So, at a depth of 10 meters below sea level, the atmospheric pressure would be twice the atmospheric pressure at sea level.

Answer:

2 Newtons

Explanation:

\(F = ma\)

Therefore, your mass would be 1kg and your acceleration would be 2m/s/s

Plug the numbers into the equation:

\((1kg)(2m/s/s)\)

which will equal

\(2 Newtons\)

The cooling rate of the object is 0.054.

Let's find the cooling rate (k) of an object using the given information. Ts = 10 °CTo = 110 °CT1 = 35 °Ct2 = 25 minutes. Now, the given formula is T = Ts + (To - Ts) e ^ -kt. Here, we know that the temperature drops from 110°C to 35°C, which is 75°C in 25 minutes. Now, we will substitute the values in the formula as follows:35 = 10 + (110 - 10) e ^ (-k × 25) => (35 - 10) / 100 = e ^ (-k × 25) => 25 / 100 = k × 25 => k = 0.054. Therefore, the cooling rate of the object is 0.054. Hence, option A is correct.

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The maximum value of capacitance C1 is chosen to be the same as C2, and the values of resistors R1 and R2 can be calculated using the corner frequency and capacitance values. Specific calculations are needed for the given design parameters to obtain the final values of a, b, C1, R1, and R2.

To design a 2nd order unity gain Butterworth active low-pass filter using the Sallen-Key topology, we need to determine the values of coefficients (a and b), as well as the maximum value of capacitance C1 and the values of resistors R1 and R2.

First, let's find the values of coefficients (a and b) using the corner frequency of 5 kHz. The transfer function of a Butterworth filter is given by:

\(H(s) = (b / s^2) / (1 + a1s + a2s^2)\)

For a Butterworth filter, the coefficients are related to the corner frequency (fc) as follows:

\(a1 = 2 * ζ * fca2 = (2 * π * fc)^2\)

Since we want a unity gain filter, b is set to 1.

Next, we need to find the maximum value of capacitance C1. In the Sallen-Key topology, C1 and C2 form a capacitor ratio, denoted as "k." The maximum value of C1 is chosen when the ratio k is at its maximum, which is 1. Therefore, the maximum value of C1 is equal to the value of C2, which is 200 nF.

Finally, we can determine the values of resistors R1 and R2. The resistor values can be calculated using the following equations:

\(R1 = R2 = 1 / (2 * π * fc * C1)\)

Substituting the values, we can calculate the resistor values.

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Answer:

Two atoms from column 1. Each would give 1 electron to the Oxygen. Oxygen will be 2- and each group 1 ion will be 1+

Explanation:

Sorry if Im wrong

One of the most significant observations that has provided the most accurate values of the age, dark matter, dark energy content, and the average density of the universe is the cosmic microwave background (CMB) radiation.

The CMB radiation is the afterglow of the Big Bang and is a remnant of the hot, dense early universe. The CMB radiation provides a snapshot of the universe when it was only 380,000 years old, and its properties can be analyzed to infer the universe's current state.

By analyzing the CMB radiation, cosmologists have determined that the universe is approximately 13.8 billion years old. Furthermore, they have found that dark matter constitutes around 27% of the universe's total energy density, and dark energy constitutes around 68%.

The CMB radiation has also provided insight into the universe's average density. By measuring tiny fluctuations in the CMB, scientists have determined that the average density of the universe is very close to the critical density required for a flat universe. This result is consistent with the inflationary Big Bang model and the concept of a flat universe.

Therefore, the observation of the cosmic microwave background radiation has been crucial in providing some of the most accurate values of the age, dark matter, and dark energy content, and the average density of the universe.

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