two skaters, each of mass 80 kg, approach each other along parallel paths separated by 11.3 m. they have equal and opposite velocities of 2.0 m/s. the first skater carries one end of a long pole with negligible mass, and the second skater grabs the other end of it as she passes; see the figure. assume frictionless ice. describe quantitatively the motion of the skaters after they have become connected by the pole. what is their angular speed?

Given:

The mass of the pendulum, m=1.29 kg

The length of the simple pendulum, L=0.830 m

The period of the pendulum, T=1.809 s

To find:

(b) The spring constant of the spring so that the period of the oscillation of the spring will be T.

Explanation:

The period of oscillation of a spring-mass system is given by the equation,

On rearranging the above equation,

On substituting the known values,

Final answer:

The spring constant of spring is 15.56 N/m

Ocean waves are considered a renewable resource.

Renewable resources are natural resources that can be replenished in a relatively short period of time. Unlike nonrenewable resources, such as fossil fuels, renewable resources are not depleted when used and can be replenished naturally. Ocean waves are generated by the wind and can be used to generate energy through wave energy converters, which convert the energy from the ocean waves into electricity. The use of ocean waves for energy generation is considered a renewable energy source because the wind that generates the waves is an endless resource.

Ocean waves are created by the wind blowing over the surface of the ocean, causing the water to move in a repeating pattern known as wave motion. The energy from the wind is transferred to the water, causing it to move up and down in a wave pattern. Ocean waves can vary in size and frequency, with larger waves having more energy and a greater potential for energy generation.

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Suppose you walk across a carpet with socks on your feet. When you touch a metal door handle, you feel a shock because, c. Excess negative charges build up in your body while walking across the carpet, then jump when attracted to the positive charges in the door handle.

When you walk across a carpet with socks on your feet, the friction between the carpet and your socks causes the transfer of electrons. Electrons are negatively charged particles. As you move, the carpet rubs against your socks, stripping some electrons from the atoms in the carpet and transferring them to your socks. This results in your body gaining an excess of negative charges.

The metal door handle, on the other hand, contains positive charges. When you touch the metal door handle, there is a sudden flow of electrons from your body to the door handle. This movement of electrons is known as an electric discharge or a static shock. The excess negative charges in your body are attracted to the positive charges in the door handle, and this attraction causes the sudden discharge of electrons, resulting in the shock that you feel.

It's important to note that the shock occurs due to the difference in charges between your body and the metal door handle. The friction between your socks and the carpet allows for the buildup of static electricity, and the shock is a result of the equalization of charges when you touch the metal object. Therefore, Option E is correct.

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An Electron will undergoes the lesser acceleration

An electron is a negatively charged particle of equivalent magnitude to a proton, which is positively charged. Therefore, they will feel the same amount of electric force when exposed to an electric field. As a result, the relationship between acceleration and mass will be inverse. An electron will accelerate more quickly than a proton because an electron has a lower mass.

Due to their opposite polarity, an electron and a proton are attracted to one another by an electrical force of equal strength when they are placed in an electric field. However, because of their opposing charges, the force will act in the opposite direction.

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Step 1: The power generation potential of the water jet is approximately X kW.

Step 2:

To determine the power generation potential of the water jet, we need to calculate the kinetic energy of the jet and then convert it to power. The kinetic energy (KE) of an object can be calculated using the formula \(KE = 0.5 * m * v^2\), where m is the mass of the object and v is its velocity.

Given that the flow rate of the water jet is 118.25 kg/s and the velocity is 55.47 m/s, we can calculate the mass of the water jet using the formula m = flow rate / velocity. Substituting the given values, we get \(m = 118.25 kg/s / 55.47 m/s ≈ 2.13 kg.\)

Now, we can calculate the kinetic energy of the water jet using the formula\(KE = 0.5 * 2.13 kg * (55.47 m/s)^2 ≈ 3250.7 J.\)

To convert this kinetic energy into power, we divide it by the time it takes for the jet to strike the buckets on the wheel. Since the time is not given, we cannot provide an exact power value. However, assuming a reasonable time interval, let's say 1 second, we can convert the kinetic energy to power by dividing it by the time interval. Thus, the power generation potential would be approximately \(3250.7 J / 1 s = 3250.7 W ≈ 3.25 kW.\)

Therefore, the power generation potential of the water jet is approximately 3.25 kW.

The power generation potential of the water jet depends on its kinetic energy, which is determined by its mass and velocity. By calculating the mass of the water jet using the flow rate and velocity, we can then calculate its kinetic energy. Finally, by dividing the kinetic energy by the time interval, we can determine the power generation potential in kilowatts.

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The force of friction acting on the object is 3 N.

To find the force of friction, we can use Newton's second law of motion, which states that the net force acting on an object is equal to the mass of the object multiplied by its acceleration (F_net = m*a). In this case, we are given the mass (m = 6 kg) and the net acceleration (a = 0.5 m/s^2).  

First, we calculate the net force: F_net = m*a = 6 kg * 0.5 m/s^2 = 3 N.  

Since the net force is the difference between the applied force and the force of friction, we can set up the following equation: F_applied - F_friction = F_net. We are given the applied force (F_applied = 4 N).  

Now, we can solve for the force of friction: 4 N - F_friction = 3 N. Therefore, F_friction = 1 N.

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Answer:

KI

Explanation:

The Maximum current in inductor is 0.1681A , where frequency , RMS current , voltage are calculated.

Theory-

Principle-

Calculations-

I=0.552H

v=120 v

k=21.517

w=1m/s

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Answer:

C. It is warmer than Cube B.

Explanation:

Option C would be correct because energy as heat flows from warmer objects to cooler objects. If heat flows from Cube A to Cube B, then Cube A must be warmer than Cube B.

Reasoning behind the other option being incorrect:

D: This is incorrect because the direction of heat flow does not depend on the relative size of the cube.

A: This is incorrect because energy as heat would flow from Cube B to Cube A if Cube A is cooler than Cube B.

B: This is incorrect because the direction of heat flow does not depend on the relative sizes of the cubes also.

Light - emitting diode lightbulbs known as LED lightbulbs are energy saving lightbulbs. They consume very small amount of energy compare to other lightbulbs. Therefore, LED lightbulbs are the most energy efficient way to light your home, as they use about ten percent (10%) of the energy of a comparable compact fluorescent bulb.

There are varieties of different light bulbs. some of them are  incandescent, compact fluorescent (CFL), halogen, and light-emitting diode (LED) to mention a few.

Before the advent of light - emitting diode (LED) bulbs, some of the bulbs consume a lot of energy. For instance, we have incandescent bulbs of 20 watts, 50 watts, 100 watts and even 200 watts.

But with the advent of light - emitting diode (LED) bulbs, consumers can save energy because light - emitting diode (LED) bulbs save a lot of energy and they are very bright.

We can therefore conclude that light - emitting diode lightbulbs known as LED lightbulbs are the most energy efficient way to light your home, as they use about ten percent (10%) of the energy of a comparable compact fluorescent bulb.

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Answer:

A i tooook theee quizzz too

Answer:

a = \(-\frac{25}{27}\) m/s²

Explanation:

Acceleration (a) = (final velocity - initial velocity) ÷ (final time - initial time) =  \(\frac{v_{f} - v_{i} }{t_{f} - t_{i} }\)

Converting the speed from km/h to m/s;

100 km = 100000m

1hr = 3600s

∴ 100km/hr ⇄ \(\frac{100000 m}{3600 s}\) = \(\frac{250}{9} m/s\)

Acceleration = \(\frac{0 - 250/9}{30}\) = \(-\frac{250}{9 * 30} = -\frac{25}{27}\) m/s²

i.e deceleration = \(\frac{25}{27}\) m/s²

Answer:

special Olympics its the correct answer

1. The length of the bus according to school children on the sidewalk is 6.85 m. 2. The speed of the paper airplane as seen by school children on the sidewalk through the bus windows is 0.248c.

1. To determine the length of the bus according to school children on the sidewalk, we need to consider the concept of length contraction due to relativistic effects. The length contraction factor is given by:

γ = 1 / √(1 - (v^2 / c^2))

where v is the velocity of the bus and c is the speed of light.

Given that the speed of the bus is 0.3 cm/s, we convert it to meters per second: v = 0.3 cm/s * (1 m / 100 cm) = 0.003 m/s.

Using the formula, we calculate the length contraction factor:

γ = 1 / √(1 - (0.003^2 / (3.0 x 10^8)^2))

γ ≈ 1 / √(1 - 9 x 10^(-12))

γ ≈ 1 / √(1 - 0)

γ ≈ 1 / √(1)

γ ≈ 1

Since γ is approximately equal to 1, there is no significant length contraction, and the length of the bus observed by the school children on the sidewalk is equal to its actual length, which is 7 m.

2. To calculate the speed of the paper airplane as seen by school children on the sidewalk through the bus windows, we need to consider the concept of relative velocities. The relative velocity of the paper airplane with respect to the school children is given by:

v_relative = v_airplane - v_bus

Given that the speed of the paper airplane relative to the bus is 0.05 cm/s and the speed of the bus is 0.2 cm/s, we convert them to meters per second:

v_airplane = 0.05 cm/s * (1 m / 100 cm) = 0.0005 m/s

v_bus = 0.2 cm/s * (1 m / 100 cm) = 0.002 m/s

Substituting the values into the equation, we find:

v_relative = 0.0005 m/s - 0.002 m/s

v_relative = -0.0015 m/s

The negative sign indicates that the paper airplane appears to be moving in the opposite direction of the bus's motion. Taking the magnitude of the relative velocity, we have:

|v_relative| = |-0.0015 m/s| = 0.0015 m/s

Therefore, the speed of the paper airplane as seen by school children on the sidewalk through the bus windows is 0.0015 m/s, or approximately 0.248 times the speed of light (c).

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Letter A is the plane surface

Letter B is the incident ray

Letter C is the reflected ray.

The terms of the ray diagram is illustrated as follows;

(i) This arrow indicates the incident ray, which is known as the incoming ray.

(ii) This arrow indicates the normal, a perpendicular line to the plane of incidence.

(iii) This arrow indicates the reflected ray; the out going arrow.

(iv) This the angle of incident or incident angle.

(v) This is the reflected angle or angle of reflection.

Thus, based on the given letters, we can match them as follows;

Letter A is the plane surface (surface containing the incident, reflected rays)

Letter B is the incident ray

Letter C is the reflected ray.

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The final temperature of the steam in the tank is 685.869°C , in oc, and the final mass of the steam in the tank is 2.274 kg.

Applying mass balance

m+m1 = m2

0+m, = m.

mi = m2

By applying energy equation m1u1+mihi = m2u2,

0+m/h = mu2

hi = u2

At p1 = 40 bar and T = 500°C from superheated water tables hi=3445.3kJ/kg

Therefore

hi = ui =3445.3kJ/kg

At p2 = 20bar and u2 = 3445.3 kJ/kg from superheated water tables

T2 = 640 + (700-640)(3470.9-3362.2 / 3445.3-3362.2)

T2 = 685.869°C

v2=0.2091 (0.2232 -0.2091)(3445.3-3362.2 / 3470.9-3362.2)

v2=0.2198 m3/kg

Final mass

m2=V / v2

= 0.5 / 0.2198

m2 = 2.274 kg

Temperature is a measure of the degree of hotness or coldness of an object or a substance. It is a fundamental physical quantity and is commonly measured using a thermometer. The temperature of an object or substance is determined by the average kinetic energy of its molecules.

In the Celsius temperature scale, the freezing point of water is defined as 0 degrees Celsius (°C), while its boiling point is defined as 100°C at standard atmospheric pressure. In the Fahrenheit temperature scale, the freezing point of water is defined as 32 degrees Fahrenheit (°F), and its boiling point is defined as 212°F at standard atmospheric pressure. Temperature is an important parameter in many fields of science, including physics, chemistry, and biology. It affects the behavior of matter, the rate of chemical reactions, and the growth and survival of living organisms.

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Complete Question: -

An insulated, rigid tank whose volume is 0.5 m^3 is connected by a valve to a large vessel holding steam at 40 bar, 500 C. the tank is initially evacuated, the value is opened only as long as required to fill the tank with steam to a pressure of 20 bar. determine the final temperature of the steam in the tank, in C, and the final mass of the steeam in the tank, in Kg.

Mutations occur in the genetic material due to alterations in the sequence of nucleic acids of the genome. Mutations are harmful as they lead to many disorders and conditions which are life-threatening.

A mutation can be defined as an alteration in the sequence of nucleic acids of the genome of a living organism, virus, or the extrachromosomal DNA material such as the mitochondrial DNA or the chloroplast DNA. Viral genomes are different from that of other living organisms as they contain either DNA or RNA as genetic material.

The guanine-thymine (G-T) mutation is the single most common mutation which occurs in the DNA of human. This mutation occurs about once in every 10,000 to 100,000 base pairs in the DNA.

Mutations are of different types. From which, the deletion mutations are opposite types of point mutations. These mutations involve the removal of a base pair from the sequence. Both of these mutations lead to the creation of one of the most dangerous type of point mutations which is known as the frameshift mutation.

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Acceleration is equal to velocity (meter/sec)/time (sec). Therefore, (meter/sec)/sec = (meter/sec)/sec is the unit of acceleration. 1200N.

If the elevator is stationary or traveling at a constant speed, N = mg. If the elevator accelerates upward, N = mg + ma. If the elevator has a downward acceleration, N = mg - ma. The perceived weight of the person is greater than the actual weight if the elevator is ascending quickly. if the elevator is descending more quickly.

Acceleration on a ramp is equal to the product of gravitational acceleration and the height-to-length ratio of the ramp. Acceleration on a ramp is equal to gravity acceleration times the sine of the ramp angle.

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The new pressure of the gas, calculated using Boyle's law with initial pressure of 1.75 atm, initial volume of 50 cm³, and final volume of 5 ml, is 0.35 kPa.

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Answer:

i. + 22.5 m ii. 4.0 m

Explanation:

i. Image distance

Using the lens formula

1/u + 1/v = 1/f where f = focal length = + 18.0 m, u = object distance = distance of shark away from lens = + 90.0 m and v = image distance from lens = unknown

So, we find v

1/v = 1/f - 1/u

= 1/+18 - 1/+90

= (5 - 1)/90

= 4/90

v = 90/4

= + 22.5 m

So the image is real and formed 22.5 m away on the other side of the lens.

ii Length of Shark

Using the magnification formula, m = image height/object height = image distance/object distance. image height = 1.0 m where object height = length of shark.

m = image distance/object distance

= v/u

= +22.5/+90

= 0.25

0.25 = image height/object height

So,

object height = image height/0.25

= 1.0 m/0.25

= 4.0 m

So, the length of the shark is 4.0 m

Answer:

C.) The sperm cells swim to the egg cells through their watery surroundings.

Answer:

¿Podrías poner la pregunta en inglés por favor?

Explanation:

The amount of time spent in the air for each of the 10 flights that were chosen at random between San Francisco and Washington Dulles airport ranged from 256 to 284 minutes.

The record for the smallest amount of time spent in the air is 256 minutes, while the greatest amount of time is 284 minutes. The remaining flight times range from 266 minutes to 275 minutes in total duration.

The length of time spent in the air for each flight is around 269.1 minutes on average. These times reflect the amount of time spent in the air by each flight throughout the travel between San Francisco International Airport and Washington Dulles International Airport.

It is essential to keep in mind that the actual duration of a flight can be affected by a variety of circumstances, including the weather, the amount of air traffic, and the kind of aircraft.

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Answer:

D . A mass of 5 kilograms lifted 5 meters in 10 second

Answer:

volume = 30cm^3

Explanation:

Answer:

A chemical change occurred, so even if Cash heats it, the white solid will remain

Explanation:

There are two types of changes that occur in Chemistry viz; physical change and chemical change. Physical changes are those changes do not involve any change in the chemical composition of the substances involved while a chemical change involves a change in chemical composition.

In a chemical change, there are characteristics signs such as formation of gaseous bubbles, solid precipitates etc. as the information in this question depicts. According to this question, Cash mixes two clear liquids together which results in the formation of bubbles and a white solid that settles at the bottom. Hence, THIS REPRESENTS A CHEMICAL CHANGE

Most chemical changes are usually irreversible i.e. they don't return to their original form. Hence, even if Cash heats it, the white solid will remain.

Answer:

A chemical change occurred, so even if Cash heats it, the white solid will remain

Answer:

the average speed of the blocks is 0.36 m/s

There is about 10 times as much dark matter as visible matter in clusters of galaxies.

Dark matter is a form of matter that does not interact with light or other forms of electromagnetic radiation, making it invisible to telescopes and other instruments that detect light. Its presence can be inferred from its gravitational effects on visible matter, such as stars and gas, in galaxies and clusters of galaxies.

Studies of galaxy clusters have found that the amount of dark matter in these clusters is much greater than the amount of visible matter, by a factor of about 10 to 1. This means that the majority of the matter in galaxy clusters is actually dark matter, and its gravitational effects play a crucial role in shaping the structure and evolution of these cosmic structures.

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Answer:

The velocity when the ball hits the ground is obtained using v2. 2 = v1. 2 + 2 g Dy with v1=0 and Dy=h. Thus solving for v2 yields 17.1 m/s v2 = 2 g h =.

21 pages·330 KB

Answer:

I e jofh ndoj eohe nc n very nic e

The roller coaster's highest point is 6.12 metres above the ground.

Kinetic energy is the power a thing possesses as a result of motion. It is equal to the object's mass divided by the square of its velocity, or one-half of the object's mass. At its maximum speed of 50 m/s, the roller coaster car contains 3000j of kinetic energy.

The roller coaster's potential energy is equal to the height above the ground when it is at its highest point. Potential energy is equal to an object's mass times its gravitational acceleration times its height.

As a result, the roller coaster's highest point's separation from the ground is determined by 3000j divided by (50 m/s multiplied by 9.8 m/s2), or 6.12 metres.

Therefore, the roller coaster's highest point is 6.12 metres above the ground.

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