a heavy object and a light object are dropped at the same time and at the same height from rest in a vacuum. the heavier object reaches the ground:

Answer:

22500 Ns

Explanation:

Given,

Mass ( m ) = 1500 kg

Velocity ( v ) = 15 m/s

Formula : -

Impulse = mv

Impulse

= 1500 x 15

= 22500 Ns

Therefore,

22500 Ns is the impulse experienced by the car.

Note : -

Ns is the unit of impulse.

We noticed that our cart was moving down the track at a continuous acceleration. This suggests that the cart was under a continuous force and that the constant force was being generated by the mass of the cart.

It is not possible for a thing to "have in it" or "contain" a force. One object experiences a force from another. The idea of a force includes both inanimate items and living things. A force can lower or modify the velocity of a massed item. Two simple ways to illustrate force are to push or pull. Given that it has both a magnitude and a direction, a force is a vector quantity.

Both direct force and distant action two different types of forces exist. It's clear that you utilize force consistently. Forces are just push and pull. You exert force on an object when you push or pull against it.

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The correct answer is A. A water molecule entering the lake will remain in the lake for 600 years.

Residence time refers to the average amount of time that a water molecule spends in a particular body of water, such as a lake. In the case of Lake Tahoe, the residence time is approximately 600 years. This means that, on average, a water molecule that enters the lake will remain in the lake for 600 years before leaving through the outlet.

Option B is incorrect because the total volume of water in Lake Tahoe can vary due to precipitation, evaporation, and other factors.

Option C is also incorrect because the residence time of water in Lake Tahoe does not necessarily relate to the ability of the lake to sustain aquatic life.

Option D is incorrect because outflow from Lake Tahoe occurs regularly and is not limited to once every 600 years.

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Incomplete dominance is a type of gene inheritance pattern in which a phenotype intermediate the two parents is observed. In the F2 generation, genotypic and phenotypic ratio of 1:2:1 (red: pink: white) is observed.

Incomplete dominance is a type of gene interaction in which both the alleles of a gene at a particular locus are partially expressed in the organism, this often results in an intermediate or different phenotype from the original parental phenotypes. It is also known as partial dominance.

In the cross between the two pink-flowered (RR') F1 plants, the offspring produced are in the F2 generation shows a genotypic and phenotypic ratio of 1:2:1 (RR: RR': R'R'). The phenotypes are 1 (red): 2 (pink): 1 (white). The punnett square is attached with the answer.

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Answer:

i believe it's 7

Explanation:

The reaction exhibited an exothermic reaction.

Considering the energy values: The energy of the resulting products is lower compared to that of the initial reactants, indicating the liberation of energy throughout the reaction. This exemplifies the characteristic behavior of an exothermic reaction.

Analyzing the shape of the graph: If we were to plot the energy of the reaction as a function of time, the graph would display a downward trajectory, signifying a decrease in the system's energy. This aligns with the typical features associated with an exothermic reaction.

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Complete question:

In a particular chemical reaction, the energy of the reactants is 30 kJ and the energy of the products is 5 kJ. The maximum energy of the system is 40 kJ.

D. Is this reaction endothermic or exothermic? Explain your answer in two ways: first, using the energy values, and second, by referring to the shape of the graph.

For the chi-square (x^2) test to be valid, N must be large enough so that for every cell the expected cell count will be equal to 5 or more.

To make the x^2 test valid, N must be large enough so that for every cell the expected cell count will be equal to 5 or more. In other words, N must be such that each cell in the contingency table has a sufficient number of observations to ensure that the test is reliable. Some guidelines suggest that N should be at least 10 or more, while others suggest that N should be at least 5 or more. However, the most important consideration is to ensure that the expected cell count is not too low, as this can lead to inaccurate or misleading results. Therefore, the key condition for a valid x^2 test is to have a sufficiently large sample size to ensure that each cell has an expected count of at least 5.

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Spending years working on a construction site can have a negative effect on a person's hearing. This is because construction sites are often loud environments, with the constant sound of heavy machinery and power tools. Over time, exposure to these loud noises can damage the delicate hairs in the inner ear that transmit sound to the brain. This damage can cause hearing loss, which may be temporary or permanent depending on the severity and duration of exposure. Additionally, the use of earplugs or other hearing protection devices may not always be possible, especially if workers need to communicate with each other or are unable to hear warning signals. This makes it even more important for workers to take steps to protect their hearing, such as wearing ear protection when possible and limiting exposure to loud noises.

The answer is A. 5.46 rad/s^2.

Here's the solution:

To find the magnitude of the average angular acceleration, we can use the following formula:

Average angular acceleration = (Change in angular velocity) / (Change in time)

Initial angular velocity: ωi = 78.0 rpm = 78.0 * 2π / 60 rad/s = 4.59 rad/s

Final angular velocity: ωf = 22.8 rpm = 22.8 * 2π / 60 rad/s = 1.40 rad/s

Angular displacement: Δθ = 320 degrees = 320 * π / 180 rad = 5.02 rad

Average angular acceleration: α = (ωf - ωi) / Δθ = (1.40 - 4.59) / 5.02 = -5.46 rad/s^2

Note that the average angular acceleration is negative because the wheel is slowing down.

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This exercise is about Reflection and Mirrors. It explores the relationship between convex mirrors, virtual images, and complex images as well as to object distance d₀.

Any d₀ value greater than 10 for a convex lens will produce a true or real image, while any d₀ value greater than 15 for a complex mirror will produce a real image.

Any d₀ number less than 10 for a convex lens will result in a virtual image. Also, any d₀ value less than 15 for a complex mirror will result in a virtual picture.

The range of d₀ values that would result in a reduced picture in both lenses and mirrors is:

d₀ > 2 f, where is the Focal length.

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Answer:

Electric current produces a magnetic field. This magnetic field can be visualized as a pattern of circular field lines surrounding a wire. ... Magnetic Field Generated by Current: (a) Compasses placed near a long straight current-carrying wire indicate that field lines form circular loops centered on the wire.

Explanation:

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The feild never generates magnetic field on it's on. It simulataniously because when the flow of current stops , it loses it's magnetism and then there will no magnetism thus no magnetic feild.

The simultaneous kinetic link principle describes how major motor movements of the body occur at the same time so that no observable difference in time exists between the contributions of the different body segments to the performance.

Sitting, standing, walking, running, and jumping are the five fundamental motor skills. The following list includes a few justifications for the significance of motor abilities: They improve one's mobility and ability to carry out tasks quickly. Development of motor skills supports the development of speech, language, and sensory systems.

The capacity to coordinate the body's muscles for large movements like crawling, walking, jumping, running, and other activities is known as gross motor skills. There are also higher level skills like climbing, skipping, throwing, and catching a ball included.

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Answer: B. 0 J

Explanation:

The frequency of the signal is = 2.5 Hz

The wavelength of the sonar device = 5.9 m

The velocity of the sound = 15 m/s

The frequency = ?

But the formula for the velocity of sound wave = frequency × wavelength

Male frequency the subject of formula,

f = v/ wavelength

f = 15/5.9

f = 2.5Hz

Therefore, the frequency of the signal is = 2.5Hz

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There solar and lunar eclipses aren't every month  because the Moon’s orbit is tilted with respect to Earth’s orbit.

When the moon passes between the sun and the Earth, a solar eclipse occurs. As a result, the moon creates a shadow on the Earth by preventing the sun's light from reaching its surface. This takes place in new moon. Up to five solar eclipses can be seen annually.

When Earth passes between the sun and the moon, a lunar eclipse occurs. As a result, the Earth's shadow falls over the moon, preventing the moon from receiving light from the sun. It happens on a full moon day. Up to three lunar eclipses can be seen annually.

The plane of the Moon's orbit around the Earth is tilted by around 5.15° in relation to the plane of the Earth's orbit around the Sun. That's way,  there aren't solar and lunar eclipses every month.

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New advancements in forensic science and the scientists responsible for these advancements are detailed below.

Technology is the use of knowledge to achieve practical goals in a repeatable manner. The term technology may also refer to the products of such endeavors, which can include both tangible things like utensils or machinery and immaterial ones like software. Technology is the application of scientific knowledge to the practical goals of human existence, or, as it is sometimes referred to, to the modification and manipulation of the human environment. Technology is the practical application of scientific knowledge. It comprises machines (such as computers) as well as procedures and processes (like the way we produce computer chips). It may appear that all technology is electronic, but that is only true of most current technology.

Here,

Researchers can now read evidence such as footprints, fingerprints, and striking marks thanks to image enhancement technology. Data mining databases, such as the Connected DNA Index System (CODIS) and the Automated Fingerprint Identification Systems (AFIS), help solve situations that were previously unsolvable.

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(a) The initial temperature is 373.95 K.

(b) The final temperature is 546.15 K.

(c) The total internal energy change of the fluid during this process is 515.4 kJ.

(d) The process can be represented as an isochoric heating process on the P-v diagram and as an isobaric expansion process on the T-v diagram.

(a) To find the initial temperature, we can use the saturated steam tables. At a pressure of 200 kPa, the corresponding saturation temperature is 373.95 K.

(b) Since the volume doubles, the process is an isochoric (constant volume) heating process. Using the ideal gas law, we can determine the final temperature. The initial and final volumes are related by the equation V_final = 2V_initial. Since the mass remains constant, the specific volume (v) is inversely proportional to the density (ρ). Therefore, ρ_final = ρ_initial/2. Using the ideal gas law, we can calculate the final temperature to be 546.15 K.

(c) The total internal energy change can be calculated using the equation ΔU = mC_vΔT, where m is the mass of the fluid and C_v is the specific heat at constant volume. Given the mass as 0.5 kg, the specific heat of water at constant volume, and the temperature change, we can find that the total internal energy change is 515.4 kJ.

(d) On the P-v diagram, the process is represented as a vertical line at 200 kPa, indicating constant pressure. On the T-v diagram, the process is shown as an upward-sloping line, indicating an isobaric expansion process. The initial state is represented as a point on the left, and the final state is represented as a point on the right. The path between the initial and final states is a straight line connecting these two points.

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The tension in the string supporting the rod and the attached weights is 7.11 N.

The tension in the string supporting the rod and the attached weights is the sum of the weights supported by the strings.

T = (m1 + m2)g

where;

0.4lb + 1.2lb = 1.6lb = 0.725 kg

T = 0.725 x 9.8

T = 7.11 N

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Answer:

Wavelength.

Explanation:

1 period, or wavelength, is measured from one crest to another or from one trough to another.

It is more likely that the storm you observed, which passed over you after an hour, was a mesoscale convective system (MCS) rather than an air mass thunderstorm.

Air mass thunderstorms typically form and dissipate within the boundaries of a single air mass. They are generally short-lived and do not typically travel large distances. Therefore, it is less likely for an air mass thunderstorm to travel from a location far to the west to your current location within just an hour.

On the other hand, mesoscale convective systems are larger-scale weather systems that can cover hundreds of miles and persist for several hours or even longer. They often have organized structures, such as squall lines or clusters of thunderstorms, and can move over significant distances. It is more plausible for a mesoscale convective system to travel from a distant location to your area within the span of an hour.

Considering the time and distance covered, the fact that the storm passed over you after an hour suggests that it was likely a mesoscale convective system.

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Answer:

A contact force is the push/pull that changes the velocity of a mass by physically touching it.

Example: muscular force, friction, or air resistance.

A non-contact force does the same without touching it.

Example: electrostatic force, gravity, or magnetism.

Answer:

Airplane wings are shaped to make air move faster over the top of the wing. When air moves faster, the pressure of the air decreases. So the pressure on the top of the wing is less than the pressure on the bottom of the wing. The difference in pressure creates a force on the wing that lifts the wing up into the air.

:)

Answer:

I attached a PFD with the answer to your question and roughly 50 others involving acceleration and how to calculate it. This PDF gives you the answers to all the question whilst showing you an in-depth explanation on how they got the answer. Hopefully that helps

Explanation:

May I have brainliest please? :)

It takes the stone roughly 0.397 seconds to get from moving at 5.8 m/s to 9.70 m/s.

In physics, the term "impulse" is used to characterise or measure the impact of force operating gradually to alter an object's motion. It is commonly stated in Newton seconds or kg m/s and is denoted by the sign J.

The impulse-momentum theorem relates the impulse of a force to the change in momentum of an object. It can be written as:

impulse = change in momentum

In this problem, a stone is falling straight down under the influence of gravity. The force of gravity is the only force acting on the stone, so the impulse it experiences is equal to the change in its momentum. We can write this as:

J = Δp

where J is the impulse, and Δp is the change in momentum.

The momentum of an object can be expressed as:

p = m * v

where p is momentum, m is the mass of the object, and v is its velocity.

Therefore, the change in momentum of the stone as it falls from a velocity of 5.8 m/s to 9.70 m/s can be written as:

Δp = m * (9.70 m/s) - m * (5.8 m/s) = m * (9.70 m/s - 5.8 m/s) = 3.9 * m * kg/s

The impulse experienced by the stone is equal to this change in momentum. The impulse can also be expressed as the product of force and time:

J = F * Δt

where F is the force acting on the stone (in this case, the force of gravity), and Δt is the time for which the force acts.

We can rearrange this equation to solve for the time:

Δt = J / F

Substituting the values we have calculated, we get:

Δt = Δp / F = (3.9 * m * kg/s) / (m * g) = 3.9 s/g

where g is the acceleration due to gravity (approximately 9.81 m/s^2).

Therefore, the time for the stone to increase its speed from 5.8 m/s to 9.70 m/s is approximately 0.397 seconds.

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Answer:

heuristic.

Explanation:

Psychology can be defined as the scientific study of both the consciousness and unconsciousness of the human mind such as feelings, emotions and thoughts, so as to understand how it functions and affect human behaviors in contextual terms.

This ultimately implies that, psychology focuses on studying behaviors and the mind that controls it.

A heuristic is an automatic mental shortcut or rule of thumb that avail people the opportunity to make quick and efficient judgement in decision-making process, as well as proffering solutions to a problem. Thus, it allows people to make decisions, pass probability judgement or proffer solutions to problem quickly and efficiently while applying minimal mental effort.

Basically, a heuristic helps an individual to shorten the decision-making time while paying less attention on thinking of his or her next course of action.

Hence, when you're advised to try working backward from the desired goal to the starting point or current state. This advice describes a heuristic.

If you drop the same rock from half the height, the acceleration will be 4.9 m/s².

The acceleration of the object dropped from half of the given height is calculated as follows;

h = vt + ¹/₂at²

where;

h = 0 +  ¹/₂at²

h =  ¹/₂at²

2h =  at²

a = 2h/t²

a = (2 x 0.5h)/t²

a = (h)/(t²)

a = (17 m) / (1.86263²)

a = 4.9 m/s²

Thus,  if you drop the same rock from half the height, the acceleration will be 4.9 m/s².

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Answer:

When two objects interact, each one exerts a force on the other that can cause energy to be transferred to or from the object. For example, when energy is transferred to an Earth-object system as an object is raised, the gravitational field energy of the system increases.

Explanation:

Force and work are directly proportional to each other, while force and displacement are indirectly propotional. The equation showing the relationship is W= Fd. W represents work measured in joules; F represents force in newtons; and d represents distance in meters.