Two objects a and b with masses 10.4 kg and 4.6 kg respectively attached to two ends of a light cord that passes a very light, fixed pulley. the system is released from rest so that a and b move vertically.
a/ use the energy consideration to find the velocity of a and b after they have moved 1.2 m.
b/ compute the tension on each end of the cord.

Answer:

When the student slides the rock along the flat surface of the frozen pond, according to Newton's second law of motion, the rock is given an initial velocity of motion. According to Newton's first law of motion, the rock will continue to slide indefinitely unless it is slowed or stopped by an opposite force. According to Newton's third law, the rock experiences a reaction force from the force of friction of the ice which slows it down at a rate given by Newton's second law of motion and the rock is seen to decelerate

Explanation:

Newton's first law of motion, states that an object will remain at rest or maintain a uniform motion in a straight line, unless impressed upon by an external force

Newton's second law states that an applied force is equal to the rate of change of momentum it produces

Newton's third law states action and reaction are equal and opposite.

Answer:

\(a = 0.83\ m/s^2\)

Explanation:

Uniform Acceleration

When an object changes its velocity at the same rate, the acceleration is constant.

The relation between the initial and final speeds is:

\(v_f=v_o+a.t\)

Where:

vf  = Final speed

vo = Initial speed

a   = Constant acceleration

t   = Elapsed time

It's known a train moves from rest (vo=0) to a speed of vf=25 m/s in t=30 seconds. It's required to calculate the acceleration.

Solving for a:

\(\displaystyle a=\frac{v_f-v_o}{t}\)

Substituting:

\(\displaystyle a=\frac{25-0}{30}\)

\(\boxed{a = 0.83\ m/s^2}\)

The inverted pendulum model is the most basic mechanical system that can replicate the motion of the centre of gravity during gait.

In this model, the hip joint serves as the pivot point for the leg's inverted pendulum. The inverted pendulum's swinging motion can be used to model how the centre of mass moves during gait. The centre of mass moves in an arc as the leg swings back and forth, imitating the natural stride. This mechanical device, which has been sped up, depicts the basic dynamics of walking and offers insights into the coordination and control of human mobility.

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Answer:

I’d say the air outside the hemisphere is more free than from the inside of the hemisphere.

Explanation:

hope this help!

Answer:

Electric field intensity (Option D)

Explanation:

Vector quantities have both magnitude and direction whereas scaler quantities have only magnitude

Electric field intensity is denoted by E

The formula is

\(\\ \rm\Rrightarrow E=\dfrac{F}{q}\)

Answer:

(d) Electric intensity

Explanation:

Option B. The mechanical advantage of a handle on a water well that requires 5 newtons of force to lift a 40-Newton bucket of water is 8.

Mechanical advantage is a measure of the force amplification completed by means of the usage of a device, mechanical tool or gadget device. The device trades off input forces towards motion to gain a preferred amplification in the output pressure.

The version for this is the regulation of the lever. The mechanical advantage is the degree how which tons of force is increased with the aid of using a device or gadget. it is equal to the pressure exerted with the aid of the tool or system divided via the carried-out effort.

calculation:-

Mechanical advantage = load/effort

                                       = 40/5

                                       = 8

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Methods for discovering the nature of dark matter include direct and indirect detection, collider experiments, and astrophysical observations, changing astronomy by requiring new techniques to study and understand this elusive substance.

Astronomers are still trying to understand the nature of dark matter, which is believed to make up a significant portion of the universe's mass but does not emit, absorb, or reflect any detectable electromagnetic radiation.

To search for dark matter, scientists use various methods, including direct detection experiments that aim to capture dark matter particles interacting with ordinary matter, indirect detection experiments that look for the products of dark matter annihilation or decay.

Collider experiments that aim to create dark matter particles in high-energy particle collisions, and astrophysical observations that study the effects of dark matter on cosmic structures.

The search for dark matter has changed astronomy by requiring the development of new techniques and technologies to detect and study this mysterious substance. It has led to advancements in detector technologies, data analysis methods, and theoretical models to better understand the nature of dark matter and its role in the universe.

The search for dark matter has also highlighted the need for interdisciplinary collaboration between astrophysicists, particle physicists, and other scientists to tackle this complex problem. Overall, the search for dark matter has expanded our understanding of the universe and pushed the boundaries of how astronomy is done.

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Answer:

Input power, Ip = 4 Watts

Explanation:

Given the following data;

Power output = 0.8 Watts

Efficiency = 20%

To find the power input of the sunlight onto the solar panel;

Mathematically, the efficiency of a machine is given by the formula;

\( Efficiency = \frac {Out-put \; power}{In-put \; power} * 100 \)

Substituting into the formula, we have;

\( 20 = \frac {0.8}{Ip} * 100 \)

\( 20 = \frac {80}{Ip} \)

Cross-multiplying, we have;

\( 20Ip = 80 \)

\( Ip = \frac {80}{20} \)

Input power, Ip = 4 Watts

According to the first law of thermodynamics, the change in internal energy of a system is equal to the heat added to the system minus the work done by the system. Since the container has rigid walls, no work is done by the gas. Therefore, the change in internal energy is equal to the amount of heat that left the gas, which is 280 kJ. Therefore, the change in internal energy of the gas during this process is 280 kJ.

Thermodynamics is a branch of physics that studies the relationship between energy, heat, work and entropy in physical systems. Thermodynamics has four basic laws that govern the behavior of a thermodynamic system under conditions of equilibrium. Thermodynamics can also be used to analyze energy change processes in heat engines, refrigeration cycles, chemical reactions, and other natural phenomena.

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Radio waves are most likely to be non-ionizing radiation.

Electromagnetic radiation can be classified into ionizing or non-ionizing radiation, depending on its ability to ionize atoms or molecules in its path. Ionizing radiation has enough energy to remove electrons from atoms or molecules, while non-ionizing radiation lacks sufficient energy to do so.

Radio waves have the lowest frequency and energy among the different types of electromagnetic radiation in the electromagnetic spectrum. They have a wavelength range of 1 millimeter to 100 kilometers, and their energy is typically below 10^-4 electron volts, which is not enough to ionize atoms or molecules. As a result, radio waves are classified as non-ionizing radiation.

On the other hand, ultraviolet, X-rays, and gamma rays have higher frequencies and energies than radio waves and are classified as ionizing radiation. Ultraviolet radiation has enough energy to ionize atoms or molecules in the air, causing sunburn and other skin damage. X-rays and gamma rays have enough energy to penetrate through materials, including human tissues, and can cause cellular damage or mutations if exposure occurs.

In summary, radio waves are non-ionizing radiation, while ultraviolet, X-rays, and gamma rays are ionizing radiation.

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Answer:

true

Explanation:

based on a scientist's research it is proven true because they travel the exosphere and they give information to the weather people and is used for the latest technology. :>

Answer:

A submission from India says the name Priyadharshini means "Beloved and pleasing to look at" and is of Sanskrit origin. According to a user from India, the name Priyadharshini is of Indian (Sanskrit) origin and means "God gift".

Answer: u excited for the super bowl?

Explanation:

Answer:

  36 years

Explanation:

Given the equation of Kepler's third law as T² = a³, you want to know the period of an asteroid that has an orbital radius of 11 au.

Solving the given equation for t, we find ...

  T = a^(3/2) . . . . . . take the 1/2 power

Then for a=11, the period in years is ...

  T = 11^(3/2) ≈ 36.48

The period of the asteroid is about 36 years.

Even though speed doesn't vary, acceleration is a change in motion that slows down, speeds up, or changes direction.

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Answer:

need more context

Explanation:

Answer:

EL QUE TENGA MÁS MASA Y MÁS ALTURA.

Explanation:

Answer:

there are just a bit over 1.6 km in a mile so 7.5*1.6=12. something so there is just a little bit more distance in 7.5 miles

Explanation:

According to Kirchhoff's Laws, if ammeters and voltmeters are not to significantly alter the quantities they are measuring, the resistance of an ammeter should be much lower, and the resistance of a voltmeter should be much higher than those of the circuit being measured. Option b is correct.

This is because the electrical resistance of an instrument should be less than the electrical resistance of the circuit element being measured so that the instrument does not disturb the circuit. Kirchhoff's Laws are a set of fundamental principles that govern electrical circuits. They were first described by German physicist Gustav Kirchhoff in 1845. The first of these laws states that the sum of the currents entering any junction in a circuit must be equal to the sum of the currents leaving that junction.

The second of Kirchhoff's Laws states that in any closed loop of a circuit, the sum of the voltage sources must be equal to the sum of the voltage drops. The resistances of the ammeter and voltmeter should be as small as possible to avoid altering the electrical characteristics of the circuit being measured. An ammeter is a measuring device used to measure the electrical current flowing through a circuit, whereas a voltmeter is used to measure the electrical potential difference between two points in a circuit.

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The correct option is D. This is due to the fact that the rod in D has the same length as the vibrating rod (unlabeled), making it more likely for it to enter into resonance and generate a more pronounced oscillation.

In a complex mixture of chemical compounds that are reacting, a chemical oscillator is one in which the concentration of one or more components changes on a regular basis.

A trustworthy point level sensor for high and low level indication or plugged chute detection is a vibrating rod, also known as a vibrating level switch. Bulk densities of as little as 1.25 lb/ft3 can be used for their use in light, fluffy powders and flakes.

Therefore, option (d) is correct-This is because, the rod in D has same length as the vibrating rod (unlabeled) so its more likely to get in resonance with that that's why it oscillates more vigorously.

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Answer:

h = 11.47 m

Explanation:

Initial speed pf the t-shirt gun is 15 m/s

We need to find the maximum distance covered by the t-shirt. It is based on the conservation of energy. The maximum distance covered is given by :

\(h=\dfrac{u^2}{2g}\\\\h=\dfrac{(15)^2}{2\times 9.8}\\\\h=11.47\ m\)

So, it will cover a distance of 11.47 m.

Answer:

1.33ohms

Explanation: The formula for resistance in a parallel circuit is :

1/Rt = 1/R1+1/R2

Where Rt represents total resistance, R1 = 4ohms and R2 = 2ohms

1/Rt = 1/4+1/2

1/Rt = 1+2/4

1/Rt = 3/4

Rt = 4/3

Rt= 1.33ohms

Hence the total resistance is 1.33ohms

The researcher is studying the amount of trash (in kgs per person) produced by households in city X, and previous research suggests that the amount of trash follows a distribution with density force fe (2) --1/7 torz.

The density function fe (2) --1/7 torz indicates the probability distribution of the amount of trash produced by households in city X. This means that the researcher can use this distribution to make predictions about the amount of trash that is likely to be produced by households in the city. The density function can be used to calculate the probability of producing a certain amount of trash per person, given the distribution.

A probability density function is a function that describes the likelihood of a continuous random variable taking on a specific value within a given range. In this case, the continuous random variable is the amount of trash (in kgs per person) produced by households in city X. The pdf provided in the question, f(e) = 1/7 for 2 ≤ e ≤ 9, indicates that the amount of trash follows a uniform distribution between 2 and 9 kgs per person.
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The bus will go 2.788×10^14 meters far if the special detector placed on one of the bus's tires counts the number of rotations completed by the tire during the journey.

What is a circle?

It is described as a set of points, where each point is at the same distance from a fixed point called it's center.

wr are going on a field trip in a school bus. A special detector placed on one of the bus's tires counts the number of rotations completed by the tire during the journey.

It is given that diameter (D) of the tyre = 111 meters

circumference of the tyre = πD

circumference of the tyre = 3.14 × 111

= 348.5 m

In 800080008000 rotations, total distance covered = 348.5 × 800080008000 = 2.788×10^14

Thus, the bus will go 2.788×10^14 meters far if the special detector placed on one of the bus's tires counts the number of rotations completed by the tire during the journey.

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Answer:

i beleive its 4.0 ml

Explanation:

The question addresses the stability of the atmosphere and the factors that determine convective stability or instability. It also explains the difference between the adiabatic lapse rate of dry air and wet saturated air.

a) The stability of the atmosphere is determined by the temperature profile and relative densities of the air cell and atmosphere. If the temperature of the surrounding atmosphere decreases with altitude at a rate greater than the adiabatic lapse rate of the air cell, the atmosphere is considered convectively stable.

In this case, the air cell will return to its original position. Conversely, if the temperature of the surrounding atmosphere decreases slower than the adiabatic lapse rate of the air cell, the atmosphere is convectively unstable. The air cell will continue moving in the same direction.

b) The adiabatic lapse rate refers to the rate at which temperature decreases with altitude for a parcel of air lifted or descending adiabatically (without exchanging heat with its surroundings). The adiabatic lapse rate of dry air is higher (around \(9.8^0C\) per kilometer) compared to the adiabatic lapse rate of wet saturated air (around 5°C per kilometer).

This difference arises because when water vapor condenses during the ascent of saturated air, latent heat is released, reducing the rate of temperature decrease. A diagram can illustrate the difference between the two lapse rates, showcasing their respective slopes.

c) When wet unsaturated air rises from the ocean surface, its temperature decreases at a rate equal to the dry adiabatic lapse rate. However, if the ambient lapse rate (temperature decrease with altitude) is higher than the adiabatic lapse rate for dry air, a temperature inversion layer forms at higher altitudes.

In this inversion layer, the temperature increases with altitude instead of decreasing. A schematic diagram can depict the temperature changes of the wet air in comparison to the ambient temperature, showing the inversion layer.

Cumulus clouds form at the altitude where the rising moist air reaches the level of the temperature inversion layer. These clouds are formed due to the condensation of water vapor as the air parcel cools to its dew point temperature.

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When comparing and contrasting how sound is heard by a person observing a moving car versus a person moving with the car, the primary difference lies in the Doppler effect, this occurs when the source of sound is moving relative to the observer and the sound intensity.

For the person observing the moving car, the pitch of the sound will change due to the car's motion. As the car approaches the observer, the sound waves compress, resulting in a higher pitch. Conversely, as the car moves away, the sound waves expand, leading to a lower pitch. In contrast, for the person moving with the car, the sound remains constant because the relative motion between the sound source and the observer is the same, this individual will not experience the Doppler effect and will hear the car's sound at its original pitch.

Furthermore, the observer at rest may experience varying sound intensity due to the car's changing distance. On the other hand, the person moving with the car will have a relatively consistent sound intensity, as their distance from the sound source remains constant. Overall, the Doppler effect and sound intensity are the key factors that differentiate the auditory experience between these two scenarios.

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A softer landing occurs when a falling object bounces from a surface. This is a common occurrence when an object with some degree of elasticity is dropped.

When it strikes a surface, the object's kinetic energy is transformed into potential energy. When it bounces back, some of that potential energy is transformed back into kinetic energy, resulting in a bounceback.A softer landing occurs when a falling object bounces from a surface due to elasticity.

For instance, when a ball is dropped, it hits the ground, and a softer landing occurs when the ball bounces from the ground, causing it to absorb less impact than if it had just hit the ground. Soft landings can happen when a surface is made of a soft or elastic material that can deform and absorb some of the impact, reducing the force of the landing.A ball with more elasticity will bounce higher than a ball with less elasticity.

This is due to the fact that a ball with higher elasticity will rebound with more kinetic energy, resulting in a higher bounce. A softer landing can also occur if the surface that the object lands on is cushioned or padded, such as when a person jumps onto a foam mat.

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