Can you help me on this? it is a phyisical science question.

Answer:

1000kg

Explanation:

We can use the equation "p=mv"

If we rearrange the equation to find mass (m), then the equation becomes:

m=p/v

We can substitute in the values of p and v as they are already given in the question.

So, now we just substitute in the values to get our answer.

m=p/v

m=25,000/25

m=1000kg

The plots of s(t) and b(t) from step 1.10 exhibit distinct characteristics. The plot of s(t) represents a sinusoidal function, which is a smooth oscillation with a regular pattern. It shows a consistent and predictable behavior over time. On the other hand, the plot of b(t) represents a random or noisy signal. It lacks a specific pattern or regularity, exhibiting irregular fluctuations and unpredictability.

The difference between the two plots can be further explained by their underlying mathematical properties. The sinusoidal function s(t) can be described by a mathematical equation, such as s(t) = A sin(ωt + φ), where A represents the amplitude, ω is the angular frequency, t denotes time, and φ represents the phase shift. This equation allows us to precisely determine the value of s(t) at any given time.

In contrast, the random signal b(t) does not follow a specific mathematical equation. It can be generated by various stochastic processes or noise sources, introducing randomness and unpredictability. The values of b(t) at different time points are typically independent and not determined by any deterministic pattern.

Therefore, the key difference between s(t) and b(t) lies in their regularity and predictability. While s(t) exhibits a consistent and predictable oscillatory behavior, b(t) lacks a discernible pattern and displays random fluctuations over time.

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The main difference between a white-dwarf supernova and a massive-star supernova is the absence/presence of hydrogen lines in the spectrum.

A white-dwarf supernova occurs when a white dwarf star accumulates enough mass from a companion star to surpass the Chandrasekhar limit and undergoes a thermonuclear explosion. This explosion results in a lack of hydrogen lines in the spectrum due to the absence of hydrogen in the white dwarf's composition.

On the other hand, a massive-star supernova occurs when a massive star exhausts its fuel and undergoes a core-collapse explosion. This explosion results in the presence of hydrogen lines in the spectrum due to the abundance of hydrogen in the star's composition.

Additionally, massive-star supernovae often have a higher luminosity and longer duration than white-dwarf supernovae. Observationally, astronomers can differentiate between the two types of supernovae by analyzing the spectrum of the explosion and looking for the presence or absence of hydrogen lines.

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Difference is that science is a particular discipline or branch of learning, especially one dealing with measurable or systematic principles rather than intuition or natural ability or science can be scion while physics is the branch of science concerned with the study of properties and interactions of space, time etc

Answer:

kinedk engrerr

Explanation:

Answer: b. A construction worker carries a heavy beam while walking at constant speed along a flat surface.

Explanation:

Answer:

A construction worker carries a heavy beam while walking at constant speed along a flat surface.

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Answer:

0.5 or 50%.

Explanation:

The ripple ratio is a measure of the magnitude of AC voltage compared to the DC voltage in a circuit, typically used in power electronics. It is calculated as the ratio of the amplitude of the AC component (VAC) to the DC component (VDC) in a waveform.

Given:

Amplitude of AC component (VAC) = 10 Vpp (peak-to-peak) = 10/2 = 5 V

Nominal DC voltage (VDC) = 10 V

Ripple Ratio = VAC / VDC

Ripple Ratio = 5 V / 10 V

Ripple Ratio = 0.5 (or 50% when expressed as a percentage)

So, the ripple ratio for the given circuit is 0.5 or 50%.

activities you can do on a regular basis for physical education​?

If so

The length of the guy wire needed for the given tower is approximately 275.56 feet long.

To determine the length of the guy wire, we can use trigonometry and the given information about the tower and the angle.

Let's denote the length of the guy wire as "x". We have a right triangle formed by the guy wire, the tower, and the ground. The side adjacent to the 45° angle is the distance from the attachment point to the ground, which is (215 - 20) feet. The hypotenuse is the length of the guy wire, which we want to find.

Using the cosine function, we can relate the adjacent side, the hypotenuse, and the angle:

cos(45°) = adjacent / hypotenuse

cos(45°) = (215 - 20) / x

Simplifying the equation:

√2/2 = 195 / x

Cross-multiplying:

√2 * x = 2 * 195

x = 2 * 195 / √2

x ≈ 2 * 195 / 1.414

x ≈ 275.56 feet

Therefore, the guy wire should be approximately 275.56 feet long.

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Answer:

classifying: are made by using the 5 senses.  Good observations are essential in learning the other science process skills.

Examples:

The learner will be blind folded and make observations using the sense of touch.  

The learner will create  observations about a coin using the 5 senses.

The learner will mix primary colors to create more colors.

answer

2. Classifying: making observations is important to notice similarities, differences with the garden vegetables

inferring: use your information that u already know

measuring:The learner will find the mass of different liquids that have the same volume

communication:It is important to be able to share your information.  This can be done with graphs, diagrams, maps, and spoken word

Explanation:

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The speed of the 2.86 g marble after the collision is 1.05 m/s.

We can use the conservation of momentum to solve this problem:

Before the collision:

m1 = 6.63 g = 0.00663 kg (mass of the first marble)

v1 = 1.41 m/s (velocity of the first marble)

m2 = 2.86 g = 0.00286 kg (mass of the second marble)

v2 = 0 m/s (initial velocity of the second marble)

After the collision:

v1' = 0.86 m/s (final velocity of the first marble)

v2' = ? (final velocity of the second marble)

Using conservation of momentum:

\(m1v1 + m2v2 = m1v1' + m2v2'\)

Substituting the known values:

\(0.00663 kg * 1.41 m/s + 0.00286 kg * 0 m/s = 0.00663 kg * 0.86 m/s + 0.00286 kg * v2'\)

Solving for v2':

\(v2' = (0.00663 kg * 1.41 m/s - 0.00663 kg * 0.86 m/s) / 0.00286 kgv2' = 1.05 m/s\)

Therefore, the speed of the 2.86 g marble after the collision is 1.05 m/s.

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Answer:

The spring constant is 907.2 N/m

Explanation:

v^2 = u^2 + 2as

Where:

v = final velocity

u = initial velocity

a = acceleration

s = displacement

As the spring is clamped to the table, the only displacement is horizontal, so the only acceleration is due to gravity. The final velocity is 0, as the ball lands on the floor. Therefore, we can use the equation of motion to determine the initial velocity of the ball:

v^2 = u^2 + 2as

0 = u^2 + 2g(1.6 m)

u = √ (2g(1.6 m))

We know that acceleration due to gravity is 9.8 m/s^2, so:

u = √ (2 * 9.8 * 1.6) = 4.6 m/s

Now we can use the conservation of energy to solve for the spring constant.

The spring constant can be determined by using the equation:

PE = 1/2 kx^2

where PE is the potential energy stored in the spring, k is the spring constant, and x is the compression of the spring.

KE = 1/2 mv^2

where KE is the kinetic energy of the ball, m is the mass of the ball, and v is the initial velocity of the ball

The sum of the potential energy stored in the spring and the kinetic energy of the ball is conserved, so:

1/2 kx^2 = 1/2 mv^2

We can now substitute the values we know into the equation:

1/2 k * (0.2)^2 = 1/2 * (19g) * (4.6m/s)^2

Solving for k:

k = (19g * (4.6m/s)^2 ) / (0.2m)^2

k = 907.2 N/m

Note that the unit of mass is gram (g) and it needs to be converted to kg to make the units consistent.

The process of charging a conductor by bringing it near another charged object and then grounding the conductor is called Induction. The correct option is C.

The process described, in which a conductor is charged by bringing it near another charged object and then grounding the conductor, is known as induction. Induction involves the redistribution of charges within the conductor without direct contact between the two objects.

Here's how the process works: When a charged object is brought close to the conductor, the charges in the conductor are rearranged.

This occurs due to the electric field of the charged object influencing the distribution of charges within the conductor. However, the conductor itself remains electrically neutral overall.

If the conductor is then grounded, allowing it to make contact with the Earth or a large reservoir of charge, any excess charges in the conductor are neutralized or redistributed, resulting in the conductor becoming charged with the opposite polarity to that of the inducing object.

Therefore, the correct term for this process is c, induction.

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Longitudinal waves travel faster in solids compared to liquids, gases, and vacuum.

Longitudinal waves are a type of mechanical wave in which the particles of the medium oscillate back and forth in the same direction as the wave propagation. The speed of a wave depends on the properties of the medium through which it travels. In the case of longitudinal waves, such as sound waves, they propagate faster through solids than through liquids, gases, or vacuum.

The reason for this is related to the density and intermolecular forces within each medium. Solids have a higher density compared to liquids and gases, which allows the particles to be tightly packed together. This density results in stronger intermolecular forces and more frequent collisions between particles, facilitating faster energy transfer and wave propagation.

In contrast, liquids have a lower density and weaker intermolecular forces, making it more difficult for the wave to transfer energy between particles. Gases have even lower density and weaker forces, leading to slower wave propagation. Lastly, in a vacuum, there are no particles to transmit the wave, making it impossible for longitudinal waves to travel through it.

Therefore, the correct answer is C. solids, as longitudinal waves propagate faster through solid mediums.

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C. 2400 W. The average power supplied by the student running up the flight of stairs is 2400 watts. To calculate the average power supplied by the student, we can use the formula:

Power = Work / Time,

where Power is measured in watts (W), Work is measured in joules (J), and Time is measured in seconds (s).

The work done by the student is given by:

Work = Force × Distance,

where Force is the force applied by the student and Distance is the vertical distance traveled.

Given:

Force = 600 N,

Distance = 4.0 m,

Time = 4.2 s.

First, let's calculate the work done:

Work = 600 N × 4.0 m = 2400 J.

Next, we can calculate the average power:

Power = Work / Time = 2400 J / 4.2 s.

Calculating this expression, we find the average power supplied by the student.

Now, let's evaluate the answer options:

A. 630 W

B. 571 W

C. 2400 W

D. 35.7 W

By comparing the calculated value of the average power with the given answer options, we find that the correct answer is:

C. 2400 W.

Therefore, the average power supplied by the student running up the flight of stairs is 2400 watts.

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1. The south pole of a compass needle points toward a south magnetic pole.

2. Electric current in a wire is the flow of both positive and negative particles.

1. The south pole of a compass needle does not point towards the geographic south pole but actually points toward a south magnetic pole. This is because the Earth's magnetic field is generated by the movement of molten iron in its core. The magnetic field lines extend from the geographic north pole to the geographic south pole. Therefore, the south pole of a compass needle is attracted to the Earth's magnetic north pole, which acts as a magnetic south pole.

2. Electric current in a wire is the movement of electric charge. While historically, conventional current flow was defined as the movement of positive charges, it is now understood that electric current consists of the flow of both positive and negative charges. In most conductors, such as metals, the charge carriers are negatively charged electrons. However, there are also cases, such as in electrolytic solutions, where positive ions can contribute to the electric current. Hence, electric current in a wire can involve the movement of both positive and negative particles.

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Species go extinct every day due to a variety of reasons, including sudden mass dying events, predation, low population size, and reduced geographic area.

Sudden mass dying events, such as natural disasters or disease outbreaks, can wipe out entire populations of species. Predation can cause a decline in population size, as well as disrupting the ecosystem balance.

Low population size makes species more vulnerable to environmental changes and other threats. Reduced geographic area, caused by habitat loss and fragmentation, can limit a species' ability to find food and mates, ultimately leading to extinction.

Climate change is another factor that is increasingly contributing to species extinction. It is important to understand these reasons and work towards mitigating them to prevent further loss of biodiversity.

The survival of species is crucial for maintaining the health and stability of our planet.

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The work done by the applied force on the block against the frictional force is 15.75 J.

Work done is equal to product of force applied and distance moved.

Work = Force x Distance

Given is a 4 kg block is pushed 2m at an acceleration of 0.2 meter per second square up a vertical wall by constant force f applied at an angle of 37 degree with the horizontal if the coefficient of kinetic friction, μ between the block and the wall is 0.30.

From the equilibrium of forces acting on the block, we have

F - f = ma

where, F is applied force, f is frictional force, m is the mass and a is the acceleration.

Frictional force f =  μmgsinθ

Substitute the values, we get

Fcos(37) - μmgsin(37) = ma

Fcos(37) - (0.3)(4)(9.8)sin(37) = 4(0.2)

0.799F - 7.077 = 0.8

F = 9.86 N

Work done by the applied force is

W = Fdcosθ

W = 9.86 x 2 x cos(37)

W = 15.75 J

Thus, the work done by the applied force on the block against the frictional force is 15.75 J.

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Answer:

Choice A.

Nearness to a body of water causes an increase in humidity, due to the higher rate of evaporation.

The efficiency of the machine is determined as 83.3 %.

M.A = load/Effort

M.A = 4500/900 = 5

V.R = distance moved by effort/distance moved by load

V.R = 6/1 = 6

E = M.A/V.R x 100%

E = (5/6) x 100%

E = 83.3 %

Thus, the efficiency of the machine is determined as 83.3 %.

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The ratio of the magnitudes of the two charges q1 and q2 can be determined from the density of electric field lines.

(a) To find the ratio of the magnitudes of q1 and q2, observe the electric field lines' density near each charge. The more electric field lines emanating from a charge, the larger its magnitude.

The ratio of the magnitudes is the inverse of the ratio of the number of lines. For example, if there are 4 field lines originating from q1 and 2 field lines from q2, the ratio of their magnitudes would be q1/q2 = 2/4 = 1/2.

(b) At a long distance from the charges, the electric field lines will appear less dense and almost parallel to each other. This indicates a weaker electric field strength as we move away from the charges.

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The momentum is conserved in the case of this particular collision.

The conservation of linear momentum is a fundamental principle in physics which states that in the absence of any external forces, the total momentum of a system of objects remains constant. In other words, if a system of objects interacts with each other, the total momentum before the interaction is equal to the total momentum after the interaction.

Mathematically, the principle of conservation of linear momentum can be expressed as:

Σp_before = Σp_after

We know that;

Momentum before collision = ( 4 * 6) - ( 1 * 6) = 24 - 6 = 18 Kg m/s

Momentum after collision = ( 4 * 2) + (1 * 10) = 8 + 10 = 18 Kgm/s

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The scientist who asserted that the material composition of other planets and the moon was similar to that of the earth was Sir Isaac Newton. In his book "Principia," published in 1687, Newton proposed that the laws of motion and gravity applied universally, including to celestial bodies.

He argued that the same fundamental substances and elements that make up the Earth are also found on other planets and the moon. Newton's assertion was based on his understanding of gravity and the laws of motion, which he developed through his studies in physics and mathematics.

By observing the motion of planets and their moons, Newton concluded that they were governed by the same forces that operate on Earth. This understanding laid the foundation for our modern understanding of the composition and behavior of celestial bodies.

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The statement "A schema is a cluster of beliefs that allow one to process information about people,  emotions, and events." is true. This is further explained below.

Generally, Schema is simply defined as a cluster of beliefs that allow one to process information about Humans, emotions, and events.

In conclusion, a cluster of beliefs that allow one to process information about Humans is a  Schema

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Answer:

true

Explanation:

they float on water because the ice has the same mass of water and is density is lighter

The metaphor (object) that shows how Aristotle's Three Artistic Proofs hold up one's argument is a stool. The correct option is 1.

The Three Artistic Proofs are Aristotle's fundamental concepts of argument that build a convincing case when utilized together:

Ethos: It is the ethical appeal; it establishes credibility with an audience.

Pathos: This refers to the emotional appeal; it appeals to the audience's emotions and sentiments.

Logos: It is the logical appeal; it uses reasoning and logical argument to persuade and convince the audience.

The metaphor (object) that shows how Aristotle's Three Artistic Proofs hold up one's argument is a stool. A stool is a three-legged object that can stand on its own with each leg equally supporting the weight. It is like the three artistic proofs, which are required in a good argument to hold it up. Without one of the three legs, the stool would be unstable and would fall apart. This metaphor is commonly used to explain how the three artistic proofs work together to build a convincing case. Option 1.

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Method of section is a significant method of determining forces in members of a structure.

The basic concept of the method of section is to find out the forces acting on the sections by separating them from the rest of the structure.

In this problem, the moment at point b has to be determined using the method of section.

The given weight of the beam is

w = 40.3 lb/ft.

Let's draw the free-body diagram for the given beam:

Free-Body Diagram:

As we can see from the above diagram, the section has been drawn which passes through point b.

We have to determine the moment at point b using this section.

Now, we will write the equation for the moment of the section passing through point b as:

- 12(6) - 4(8) - (20)(12) - (32)(20) - (40.3)(12/2) = 0Mb = 1126.05 lb-ft

the moment at point b is 1126.05 lb-ft.

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