Look at the illustration of the various positions of the moon in its orbit around the earth. For each position, draw the phase of the moon as seen from earth and label the lunar phase. In the table, fill in the approximate times of moonrise and moonset for the indicated lunar phases. Explain how the times of moonrise and moonset were chosen.

Answer:

450N

Explanation:

Given data

Mass m= 75kg

Acceleration= 6m/s^2

From the Newtons first law, F=ma

substitute

F=75*6

F= 450N

Hence the force is 450N

The electric field in the regions between the plates will be as follows:

No electric field as θ¹=0.

Constant electric field with magnitude 20.

Constant electric field with magnitude 10, directed opposite to the field in region 2.

Constant electric field with magnitude 10, directed opposite to the field in region 3.

Constant electric field with magnitude 10, directed opposite to the field in region 4.

Constant electric field with magnitude 10, directed opposite to the field in region 5.

Constant electric field with magnitude 10, directed opposite to the field in region 6.

Constant electric field with magnitude 10, directed opposite to the field in region 7.

In the given configuration, we have seven infinite parallel plates with different charge densities: θ¹, θ², θ³, θ⁴, θ⁵, θ⁶, and θ⁷.

However, the first plate (θ¹) has a charge density of 0. Since the charge density on this plate is zero, it implies that there is no charge present on this plate. Consequently, the electric field in the region corresponding to this plate will also be zero. For the remaining six plates, with charge densities θ² = 20, θ³ = 30, θ⁴ = 40, θ⁵ = 50, θ⁶ = 60, and θ⁷ = 70, the electric field can be determined using Gauss's law. Gauss's law states that the electric field between two parallel plates is directly proportional to the charge density. Therefore, the electric field in the regions corresponding to these plates will increase with increasing charge density. The electric field will be strongest in the region between the plate with charge density θ⁷ and the plate with charge density θ⁶, as the charge density on θ⁷ is the highest among all the plates.

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The winding density of the solenoid is approximately 1881 turns per meter.

To calculate the winding density of the solenoid, we need to determine the total number of turns in the solenoid per unit length.

The energy stored in a solenoid can be expressed as:

    E = (1/2) * μ₀ * n² * A * I² * L,

where:

      n² = (2E) / (μ₀ * A * I² * L)

      n = √((2E) / (μ₀ * A * I² * L))

n = √((2 * 6.00 × 10⁻⁶ J) / (4π × 10⁻⁷ T·m/A * π * (0.050 m)² * (0.400 A)²

* 0.700 m))

       n = √((2 * 6.00 × 10⁻⁶) / (4π × 10⁻⁷ * 0.050² * 0.400² * 0.700))

         n ≈ 1881  turns/m

Therefore, the winding density of the solenoid is approximately 1881  turns per meter.

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Answer

3ms^-2

_________

The specific heat of a substance of a container affect the quantity of substances that can be accommodated in the container at a given temperature.

The specific heat capacity of a substance is the quantity of heat required to raise the temperature of a unit mass of the substance.

Mathematically, the formula relating specific heat capacity and heat capacity of a substance is given as;

Q = m x  c  x Δθ

where;

From the formula above we can make mass " m " the subject of the formula;

m = ( Q ) / (  c  x Δθ )

As the specific heat of a substance increases, the smaller the mass of the substance that can be held in a container at equal heat gain and temperature and vice versa.

Thus, the specific heat of a substance affects the performance of a container as it depends the mass or volume of the substance that can be held in a container at a constant heat capacity and temperature.

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Answer:

its Q

Explanation:

There is no figure provided in the question. However, based on the given information, the direction of the magnetic field of an electromagnetic wave can be determined using Maxwell's equations and the right-hand rule.

If the electric field is along the z direction and the wave propagates along the y direction, the magnetic field must be either along the x or y direction.

The direction of the magnetic field can be determined using the right-hand rule, which states that if the fingers of the right-hand curl in the direction of the electric field, then the thumb points in the direction of the magnetic field.

The magnetic field must be in the x direction if the wave is propagating towards the positive z direction, or in the y direction if the wave is propagating towards the negative z direction.

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The average net force on the blood during this time is 0.4 F

According to Newton's second law, we use formula

F=m.a

F=(m.v)/t

F= 80×1/0.20

F=0.4 F

Newton's II law reads "An object with mass m experiences a resultant force of F will experience acceleration (a) whose direction is the same as the direction of the force and its magnitude is directly proportional to F and inversely proportional to mass (m)."

Every object tends to maintain its state as long as there is no resultant force acting on it. Newton's experimental results show that the force exerted on an object will cause the object to experience a change in velocity.

When the force is in the same direction as the object's motion, its speed increases and when the force is opposite to the object's motion, its speed decreases.

Formulas on Newton's Law II

F = m.a

F = the force acting on the object (N)

m = mass of object given force (kg)

a = acceleration of the object given the force (m/s2)

If the style works more than one is written:

∑F= ∑ m.a

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The deceleration of the body is -1 m/s^2, the distance between X and M is 200m, and the time taken by the body to move from X to M is 20 seconds.

Kinematic equations are a set of mathematical equations used to describe the motion of an object in terms of its displacement, velocity, and acceleration, given certain initial conditions.

To solve this problem, we can use the following kinematic equations of motion:

v = u + at

s = ut + (1/2)at^2

v^2 = u^2 + 2as

Where:

u = initial velocity

v = final velocity

a = acceleration or deceleration

t = time taken

s = distance covered

i) To find the deceleration of the body:

From the first equation, we have:

v = u + at

20 = 40 + a(20)

a = (20-40)/20 = -1 m/s^2

Therefore, the deceleration of the body is -1 m/s^2.

ii) To find the distance between X and M:

We know that the total distance covered from P to M is:

s = 200m + distance between X and M

When the body is at rest at point M, we can use the third equation:

v^2 = u^2 + 2as

Since the body is brought to rest, the final velocity is zero:

0 = 20^2 + 2(-1)s

s = 200 m

Therefore, the distance between X and M is 200m.

iii) To find the time taken by the body to move from X to M:

From the second equation, we have:

s = ut + (1/2)at^2

Since the initial velocity is 20m/s and the final velocity is zero, we have:

s = (1/2)at^2

200 = (1/2)(-1)t^2

t^2 = 400

t = 20 seconds

So, the time taken by the body to move from X to M is 20 seconds.

Therefore, 200 meters separate X and M, the body is decelerating at -1 m/s^2, and it takes the body 20 seconds to get from X to M.

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Answer:

To get your answer multiply 637N by 10N/kg to get 6370kg

The mass of an object weighing 637 N on earth is 65 kg. The acceleration due to gravity on mars is 3.72 m/s². Then its weight on mars is 241.8 N.

The gravitational force is the force by which an object attracts other object into its center of mass. Earth attracts every objects into its surface and that is why we are all standing on the ground and experience a weight.

The acceleration due to gravity is the acceleration to the downward motion by gravitational force for an object.  The weight of an object is the sum of its mass and acceleration due to gravity of the planet in which the object is placed.

The acceleration due to gravity of earth = 9.8 m/s²

then mass of person weighing 637 N = 637 N/9.8 m/s² = 65 Kg

acceleration due to gravity of mars = 3.72  m/s²

then weight of the mass 65 kg = 65 kg × 3.72  m/s² = 241.8 N.

Therefore, the person will weight 241.8 N at mars.

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Answer:

It's should be 7.0m/s.....i hope it helps

The  answer to the question is option A, which states that the additional water available from a hydrant is determined by the difference between static pressure and residual pressure.



Static pressure refers to the pressure in a water system when there is no water flowing. Residual pressure, on the other hand, refers to the pressure that remains in the system while water is flowing. The difference between these two pressures is what determines how much additional water can be obtained from a hydrant.

Option B, which mentions the difference between friction loss and current water pressure, is not directly related to determining the additional water available from a hydrant.

Option C, which states the difference between static pressure and atmospheric pressure, is also not relevant as atmospheric pressure does not play a role in determining the additional water available from a hydrant.

Option D, which suggests the sum of static pressure, residual pressure, and atmospheric pressure, is also not accurate as atmospheric pressure is not a factor in this calculation.

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Because they sit high up, truck drivers have excellent visibility (option c) forward.

The statement suggests that truck drivers have a good view of the road and surroundings in the direction they are moving, which is forward.

The high position of the driver's seat in trucks provides an advantageous vantage point, allowing them to see the road ahead clearly and have a better perspective of the traffic conditions.

Sitting higher than most vehicles on the road, truck drivers benefit from an elevated position that enhances their field of vision.

This elevated viewpoint allows them to have a broader and clearer view of the road, enabling them to anticipate and react to potential hazards or obstacles in advance.

The improved visibility from the elevated seat position helps truck drivers make informed decisions while driving and enhances overall safety.

In conclusion, the phrase "truck drivers have excellent visibility because they sit high up" suggests that the excellent visibility is primarily in the forward direction, providing them with a clear view of the road and surroundings ahead.

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C. Increasing the voltage in a circuit increases its power.

is the relationship between voltage and power in a circuit

The watt is the unit of power measurement. The power will quadruple if the voltage increases. In a circuit, if the voltage (or electrical pressure) is raised, the current (flow of electrons) will rise in direct proportion; for example, doubling the voltage will result in doubling the current flow.

Several different voltages will produce the same amount of power as long as you can pull adequate current (amps) from the battery. Hence, hypothetically, a higher voltage does not automatically translate into more power. Typical voltage values for peak (max) volts are 40, 80, and 120 volts.

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False. The terminator of a gene is located downstream of the coding region.The terminator of a gene is a DNA sequence that signals the end of transcription, or the process by which genetic information is converted from DNA to RNA.

It is located downstream of the coding region, which is the part of the gene that contains the instructions for making a particular protein. The terminator helps to regulate the amount of mRNA that is produced, as well as to prevent the production of unwanted transcripts. The precise location and sequence of the terminator vary among different genes, but its role in regulating transcription is an important aspect of gene expression.

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Explanation:

Primary cell    

1. They are non-rechargeable.

2. The energy density of primary cells is more.

3. The internal resistance of primary cells is more.

4. Example : Zinc-Carbon cell.

Secondary cells

1. They are rechargeable cells.

2. The energy density of secondary cells is less.

3. The internal resistance of secondary cells is less.

4. Example : Car batteries

Current :

The flow of electric charge per unit time is called electric current. It can be given by the formula as follows :

\(I=\dfrac{q}{t}\)

The SI unit of electric current is Ampere.

1 Ampere is defined as the current that flows with the electric charge of one Coulomb per second (C/s).

A force of 15 Newton stretches a spring to a total length of 30 cm and an additional force of 10 Newton's stretches to a Spring of 5 cm, the natural length of the spring is 58.5 cm

To find the natural length of the spring, we can use Hooke's law, which states that the force applied to a spring is directly proportional to the displacement of the spring from its natural length.

Let's denote the natural length of the spring as L.

According to the problem, a force of 15 Newton stretches the spring to a total length of 30 cm. This means that the displacement of the spring is 30 cm - L.

Using Hooke's law, we can set up the following equation:

Force = k * Displacement

where k is the spring constant.

For the first scenario, we have:
15 N = k * (30 cm - L)

Next, we are given that an additional force of 10 Newton's stretches the spring to a length of 5 cm. This implies that the displacement of the spring is 5 cm - L.

Using Hooke's law again, we can set up the following equation:

10 N = k * (5 cm - L)

Now we have two equations:

15 N = k * (30 cm - L)
10 N = k * (5 cm - L)

We can solve this system of equations to find the value of L, the natural length of the spring.

By dividing the second equation by 10, we get:

1 N = k * (0.5 cm - 0.1L)

Rearranging the equation, we have:

1 N = 0.5 k - 0.1kL

Now, let's substitute the value of k from the first equation into this equation:

1 N = 0.5 (15 N / (30 cm - L)) - 0.1 (15 N / (30 cm - L)) * L

Simplifying the equation, we get:

1 = 0.75 / (30 cm - L) - 1.5L / (30 cm - L)

Combining the terms on the right side of the equation, we have:

1 = (0.75 - 1.5L) / (30 cm - L)

Cross-multiplying, we get:

30 cm - L = 0.75 - 1.5L

Simplifying the equation, we have:

L - 1.5L = 0.75 - 30 cm

Combining like terms, we get:

-0.5L = -29.25 cm

Dividing both sides of the equation by -0.5, we get:

L = 58.5 cm

Therefore, the natural length of the spring is 58.5 cm.

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Answer:

If you try to lift up a weight in a swimming pool and then try to lift the same weight on the edge of the pool, it feels much lighter in the water.

This was supposed to have been first explained by the Greek scientist Archimedes. He said that the water gives an upward force or upthrust on any object in it.

You can weigh an object in air and then in water and actually work out the upthrust, it is the difference between the two readings. For this reason the upthrust is often called the loss in weight of the object.

Answer:-11m/s^2

Explanation:

Doubling the speed of the object would increase the kinetic energy of a moving object the most.

Kinetic energy is a form of energy that an object possesses when it is in motion. It is directly proportional to an object's mass and the square of its velocity.

The formula for kinetic energy is as follows:

K = 1/2mv²

Where,K is the kinetic energy of the object.m is the mass of the object.v is the velocity of the object.

Therefore, when the velocity of a moving object is doubled, its kinetic energy is quadrupled. Therefore, doubling the speed of the object would increase the kinetic energy of a moving object the most, as compared to other given options.

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Answer:

the third law (for every action there is an equal and opposite reaction).

Explanation:

The skateboarder pushes backwards on the road (that is he applies a force on the road in a direction opposite the direction of intended motion). By Newton's third law, this action of the skateboarder causes an equal reaction of the road on the skateboarder in the opposite direction. Newton's third law states that action and reaction are equal but opposite in direction. So, the road in response to this backward force pushes the skateboarder in the forward direction causing the skateboarder and the skateboard to move in the forward direction.

The amplitude, wavelength, velocity, and intensity of a wave change as it moves through different media, but the frequency remains constant.

Wavelength and wave speed both change as you switch from one medium to another, but frequency stays constant. Whether there is energy absorption at the boundary or not will determine whether the amplitude decreases or stays the same.

Speed = Wavelength x Frequency is an equation that relates wave speed to both wave wavelength and wave frequency. The medium, or the substance through which waves are propagating, determines the majority of wave speeds.

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At a fixed location, the phase changes by 55.04 radians during a time interval of 0.01 s.

First use the formula to find the wavelength of the wave:

wavelength = speed/frequency

Use the fact that the speed of a wave is related to its wavelength and frequency by the formula:

speed = wavelength x frequency

Rearrange this to get:

wavelength = speed/frequency

Now find the speed. Use the fact that the wave has a frequency of 880 Hz to find the wavelength using the formula:

speed = wavelength x frequency

speed = wavelength x 880

Use the given information that the difference in phase between two positions is π/3 radians.

The difference in phase between two positions is related to the difference in distance between those positions by the formula:

phase difference = 2π(distance difference)/wavelength

Rearrange this formula to get:

distance difference = wavelength(phase difference)/(2π)

Now substitute in the values:

distance difference = (speed/frequency)(π/3)/(2π)

Simplifying this expression gives:

distance difference = speed/(6frequency)

Find the speed to answer part (a). Using the earlier equation that relates speed, wavelength, and frequency:

speed = wavelength x frequency

substitute in the frequency and rearrange to get:

wavelength = speed/frequency

wavelength = (speed)/(880 Hz)

Use the given information in part (b) to find how much the phase changes during a time interval of Δt = 0.01 s.

The phase of a traveling wave changes over time according to the formula:

phase change = 2π(frequency)(time interval)

Substituting the given values gives:

phase change = 2π(880 Hz)(0.01 s) = 55.04 radians

Therefore, at a fixed location, the phase changes by 55.04 radians during a time interval of 0.01 s.

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Answer:

Self demagnetization means when magnets' poles are free (suspended) for too long, their magnetic attraction becomes weaker and thus, self demagnetizes.

The efficiency of the machine will be calculated from the ratio of output force to input force.

Efficiency is defined as the rate at which a machine does work.

Mathematically, efficiency is given as the ratio of output force to input force.

Eff = (output force / input force) x 100%

Eff = (load x distance moved by load) / (effort x distance moved by effort)

Thus, the efficiency of the machine will be calculated from the ratio of output force to input force.

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Answer: Endothermic and Exothermic reactions

It is important to note that the debate between scientific realism and antirealism is ongoing and complex, with various nuances and perspectives within each position. Different philosophers of science and scientists may hold different views on the nature of scientific terms and their relationship to reality.

According to a scientific realist perspective, scientific terms for unobservable phenomena such as "atom" and "black hole" are seen as referring to entities that truly exist in reality. Scientific realists believe that scientific theories and concepts accurately capture aspects of the world, including unobservable entities and phenomena. They argue that scientific theories provide the best explanation of the natural world and aim to describe the underlying structure and mechanisms of reality.

On the other hand, scientific antirealists hold a different view. They argue that scientific terms that refer to unobservable phenomena do not necessarily correspond to something that exists independently in reality. Antirealists often emphasize the instrumentalist view of science, which suggests that scientific theories are simply tools or frameworks that help us organize and predict observable phenomena, without making claims about the ultimate nature of reality.

Antirealists may argue that scientific theories are subject to revision and change over time as new evidence emerges, suggesting that the terms used to describe unobservable phenomena are not fixed and may not have a one-to-one correspondence with actual entities in reality. They may also highlight the role of social and cultural factors in shaping scientific knowledge, suggesting that scientific terms are influenced by human conventions and interpretations.

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To find the magnetic force per unit length on the wire, we need to use the formula: F = BIL sinθ Where F is the magnetic force, B is the magnetic field, I is the current, L is the length of the wire, and θ is the angle between the magnetic field and the wire.

Since the wire is perpendicular to the magnetic field, θ = 90 degrees and sinθ = 1. Therefore, the formula simplifies to:

F = BIL

We are given the magnetic field (B = 0.20 T) and the angle between the magnetic field and the x-axis (45 degrees). To find the magnetic force per unit length on the wire, we need to know the current and length of the wire.

Without knowing the current and length of the wire, we cannot calculate the magnetic force per unit length on the wire.

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