at what point along its length must the wire be cut so that the resistance of one piece is 4.0 times the resistance of the other?

The ratio of her final to initial kinetic energy is 1.33

What is conservation of angular momentum?

Conservation of angular momentum is a principle in physics according to which the total angular momentum of a system remains constant as it is free from external torque irrespective of all the various types of interaction and transformation taking place within the system. It is a physical property of spinning system. The easiest example of conservation of angular momentum is Earth spinning around at the same rate from last billions of years.

Iiwi = Ifwf

Where Ii = Initial Angular momentum

If = Final Angular momentum

wi= initial angular velocity

wf = final angular velocity

wf= Iiwi / If

= Iiwi/ 0.75 Ii

= 1.33 wi

Ki= ½ = Iiwi2

Kf= ½ (0.75) Ii (1.33 wi)2

= 1.33 Ki

Kf/ Ki = 1.33 Ki/ Ki

= 1.33

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The kind of electronic transitions that is responsible for colored light being given off is called emission.

Emission is the discharge of something, particularly radiation or gas. Emission spectrum or line spectrum is the given off of electromagnetic radiation when an electron transits from a higher energy level to a lower energy level. During the course of transition from one level to another, energy generated are emitted in the form of white light by the atoms and molecules. When electrons in the ground state of an energy level is heated, it rises to a higher energy level. It thus releases energy quickly to maintain a balanced state or go back to the ground state. If the energy released is equal to the energy that produces white light, it will form colored light.

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5ohms is the resistance of the brake light in ohms.

Resistance is the degree to which a substance obstructs or opposes an electric current. Electric current is the flow of electrons. To better understand resistance, imagine how difficult it would be for a person to move from one shop to another in a crowded market.

The following is the equation to use Ohm's Law to compute resistance: R = V I, where R is the resistor's resistance expressed in ohms () and V is the voltage drop expressed in volts.

POWER(watts) = VOLTAGE * AMPERAGE

AMPERAGE = POWER(watts) / VOLTAGE

AMPERAGE = 30/12 = 2.5

RESISTANCE(ohms) = VOLTAGE / AMPERAGE

R = 12/2.5 = 4.8ohms

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The maximum speed at which the car could be moving will be 20 m/s.

Speed is the ration of total distance travelled by an object to the total time taken by the object to cover that particular distance.

Mathematically, Speed (v) = [tex]\frac{Distance (d)}{Time (t)}[/tex]

d = v*t

d = distance traveled

v = initial speed

t = time = 0.75v

d1 = 0.75(t)

Total distance = d1 + d2 = 35m

35 = 0.75v + d2

d1=35-0.75v

According to the Equations of motion.

[tex]v^{2} = s^{2} - 2sd1[/tex]

[tex]v = \sqrt{s^{2} - 2ad1 }[/tex]

where

s = final speed = 0m/s

v = Initial speed

a = acceleration = -10m/s2

d1 = displacement

[tex]v = \sqrt{0 - 2(-10)(35-0.75v) }[/tex]

[tex]v^{2} = 700 - 15v[/tex]

[tex]v^{2} + 15v -700 = 0[/tex]

On solving the above quadratic equation we get two values of v as:

v1 = 20 m/s

v2 = -35m/s

Since the velocity of the car has to be taken and also the car is moving in the forward direction, therefore v1 will be considered as the final velocity of the car, i.e. the maximum speed at which the car could be moving and not hit the barrier 35.0 m ahead will be 20 m/s.

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The momentum of a single photon in the pulse is 1.19 * 10^-27 kg m/s.

It is the quantity of motion of a moving body, measured as a product of its mass and velocity.

How to calculate the momentum of a single photon in the pulse?
Wavelength of light is given,
λ = 556nm = 556 * 10^-9m

Wavelength and momentum (p) are related by
λ = h/p

Where h is the planck constant = 6.63 * 10^-34 m^2 kg/s

So, the momentum is

p = h/λ

[tex]\frac{6.63*10^{-34} }{ 556*10^{-9}}[/tex]

p = 1.19 * 10^-27 kg m/s

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Mass refers to a body of matter's resistance to changing its speed or location in response to the application of a force.

In physics, mass is a quantitative measurement of inertia, a basic characteristic of all matter.It essentially refers to a body of matter's resistance to changing its speed or location in response to the application of a force.The change caused by an applied force is smaller the more mass a body has.

The work done to place the box at tree house=350 J.

The distance from ground to tree house =4.0 m and g = 9.8/8²

E =mgh

m = 350 J / (9.8/8²* 4.0m)

m=8.929kg

Hence the mass of the box is 8.929kg

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The beat frequency is always equal to the difference in frequency between the two notes that interact to create the beats.

First wave frequency 5Hz

Second wave frequency 227Hz

Beat frequency 〰️222Hz.

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The heat energy lost during the cooling of metal can be calculated using calorimetric equation. The heat lost here during cooling of copper is 20102.4 Cal.

Calorimetry is an analytical tool used to determine the heat energy released  or absorbed from a chemical reaction or physical change. The heat energy q is related to the mass m of the substance, specific heat capacity c and the temperature difference ΔT as follows:

q = m c  ΔT.

It is given that the mass of copper metal is 640 g having specific heat of 0.09 Cal/g° C cooled from 375  to 26 degree Celsius. The heat lost from the metal can be calculated as follows:

q = 640 g × 0.09 Cal/g° C × (375 - 26 ° C )

  = 20102.4 Cal.

Therefore, the heat lost from the metal is 20102.4 Cal.

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Therefore, U equal to cV T represents the change in internal energy for an ideal gas, where cV stands for specific heat (at constant volume) and T for change in temperature.

Increase in temperature is 0.0176 degree Celsius. b. the remaining energy will be lost.

The mass of copper block = 1.8kg

Initial speed = 3.1 m/s

Specific heat of copper = 0.385 j/g degree Celcius.

a. The increase in temperature is calculated below:

Change i kenetic energy = 1/2mv²

= 1/2 *1.8*4²= 14.4J

85% of energy is converted into internal energy.

mc =14.4*0.85

1.8*385 = 14.4*0.85

12.24/693

=0.0176

The remaining  15 per cent of kinetic energy will be lost and it will be changed into other forms.

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The maximum weight the rocket burn is 15000N or 15kN

Now in the question rocket burns the fuel at the rate 300g/s . we are supposed to deduce the maximum weight the rocket burn have if its going to move vertically upward.

As per Classical Mechanics , overall momentum of the system is conserved biding all conservational laws.

Force= mass x acceleration

F= m dv/dt

F=v dm/dt

v=500m/s

dm/dt=300

F=500 x 300

=15kN

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To learn frequency to known frequency and frets of guitar.

What is frequency?

The number of waves that pass a fixed point in a unit of time is referred to as frequency in physics. It also describes how many vibrations or cycles a body in periodic motion makes in a given amount of time.

What is the purpose of frets?

Frets, which determine the positions for the proper notes, make it much simpler for a player to achieve an acceptable standard of intonation. Furthermore, playing chords accurately is made simpler by a fretted fingerboard.

Frequency of the vibrations of the strings.

f=2LnmT, where T is the tension in the string, L is the length, and n is the number of harmonics, gives the frequency of vibration of a string.

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Answer: Find the right angle degree and then you will find ow to do the rest.

Answer:

Explanation:

c = 180

i have same problem and it work

Intensity and time interval of a sound can be compared between the two ears to locate the source of a sound.

Intensity of the sound is defined as the proportion of energy that flows per unit time through a unit area perpendicular to the direction of motion of such sound waves.

The time it takes for a sound wave to complete one cycle is called its time interval or the time period.

A person's loudness perception is affected by the amount of sound they hear.

Therefore intensity and time interval can be considered as the sound characteristics to compare between the two ears to locate the source of a sound.

The question is incomplete, the complete question is:

'What sound characteristics can be compared between the two ears to locate the source of the sound?

a. sound shadows and frequency

b. frequency and amplitude

c. intensity and time of arrival

d. timbre and rhythm'

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To measure one wavelength, you would measure the distance between A and B.

option D is the correct answer.

The wavelength of a wave is the distance travelled by a given a wave.

The wavelength of a wave is measured in meters and it depends on the frequency and speed of the wave.

One wavelength is distance measured from the trough to another trough of  the wave form or the distance measured from crest to another crest of the wave form.

In the given image, the following are one wavelength;

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A full moon is currently visible in the sky across from our sun.

What is a new full moon?

Half of the moon is visible to us, and the other half is not lit by sunlight until around a week after the new moon. We observe the moon in this phase, sometimes referred to as the first quarter moon, around a week following the new moon.

What is waxing gibbous?

The waxing crescent and illuminated first-quarter moon are visible to the west. Since "gibbous" means "swollen" or "humpbacked," the moon phase that follows the first quarter moon is known as the "waxing gibbous moon." And indeed, it does appear as though the moon is slightly swollen or developing a small hump. You should be aware that the word "waxing" is a synonym for "increasing," which will aid you in remembering that during the waxing phase, we see more and more of the moon every night.

Therefore, the moon currently visible in the sky is a full moon.

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For a charged particle, a constant magnetic field can be used to change for a charged particle, only the direction of the particle's velocity .

magnetic force = q(VxB)  

which is perpendicular to V and B

so it can't change magnitude only can change direction.

A magnetic field is a vector field near a magnet, an electric current, or an alternating electric field where the observed magnetic forces exist. A magnetic field consists of moving electric charges and the internal magnetic moments of elementary particles associated with a fundamental quantum property called spin. The magnetic field and the electric field are both related and are components of the electromagnetic force, which is one of the four  forces of nature.

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Peak thermal radiation for the human body at 310 K has a wavelength of 9.3 mm.

The average body temperature is 310.15 oK. The infrared region is where the radiation peaks as a result. Red light with wavelengths as long as 7,000 Angstroms can be seen by the human eye. Generally speaking, infrared wavelengths are those between 7,000 and 1,000,000 Angstroms.

Light's wavelength is used to measure it (in nanometers). It is typically represented by the Greek letter. Visible light is typically defined as having a wavelength between 400 and 700 nanometers (nm), or one billionth of a meter.

The distance between equivalent places in two consecutive light cycles is known as the wavelength of light, and the frequency of light is the number of light cycles that pass a specific spot in a second.

Atoms or molecules that undergo discrete energy level transitions give rise to narrowband radiation.

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We think that it once had huge amounts of water content in its atmosphere.

The Solar System is the gravitationally bound system that includes the Sun and the objects that orbit it. It was formed by the gravitational collapse of a massive interstellar molecular cloud 4.6 billion years ago. The Sun contains the vast majority (99.86%) of the system's mass, with Jupiter holding the majority of the remaining mass. Mercury, Venus, Earth, and Mars are all terrestrial planets made mostly of rock and metal. The four outer system giant planets are significantly larger and more massive than the terrestrials. Jupiter and Saturn are gas giants, composed primarily of hydrogen and helium; Uranus and Neptune are ice giants, composed primarily of volatile substances with relatively high temperatures.

Hence, If Deuterium is more abundant on Venus than elsewhere in the solar system, I think that it once had huge amounts of water content in its atmosphere.

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Answer:

Procedure - Take 150g of ice in a beaker and suspend a laboratory thermometer so that the bulb is in contact with ice. Start heating and note the temperature when the ice starts melting. Finally, note the temperature when all the ice is completely melted.

Change in heat causes change in temperature because heat is the transfer of energy from a hotter object to a cooler object, leading to a change in the internal energy of the substance, which in turn affects its temperature.

When heat is added to a substance, its internal energy increases, and the particles in the substance gain kinetic energy, leading to an increase in temperature. The kinetic energy of the particles determines their motion, and as they move faster, the temperature of the substance rises.

Conversely, when heat is removed from a substance, its internal energy decreases, and the particles lose kinetic energy, resulting in a decrease in temperature. As the particles slow down, the temperature of the substance decreases.

The relationship between heat and temperature is described by the specific heat capacity of the substance, which quantifies the amount of heat required to raise the temperature of a given mass of the substance by one degree Celsius. In simple terms, heat is the energy transferred during a temperature change, and the two are intrinsically linked.

In summary, change in heat causes change in temperature because heat is the energy transferred that alters the internal energy of a substance, leading to changes in the kinetic energy and motion of its particles, resulting in temperature fluctuations.

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In a massive centrifuge, centripetal forces accelerate trainee astronauts to extremely high speed is 49.3 frac ms2 and 5.

During a rocket launch, an astronaut's maximum g-force is typically around 3gs. The passengers can withstand this, which is equivalent to three times the gravity that people experience while they are on Earth.

a)a c=omega2 r=frac4 pi 2 r, T2=49.3 frac ms2, and a c = 2 r= T 2

4π \s2 \s r \s​ \s =49.3 \ss \s

m \s​ \s ,

b)frac = k=F aP=\frac{a c}

g=5.k= P \sF \s\s = \sg \sa \​ \s =5.  

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The kinetic energy of the ball just after it is kicked is 48 J.

Kinetic energy is the force that propels motion, which can be seen in the movement of a particle, an object, or a group of particles. A person walking, a baseball being thrown, a piece of food falling from a table, and a charged particle in an electric field are all instances of objects in motion that use kinetic energy.

Vibrational, rotational, and translational energy are the three subtypes of kinetic energy. Unsurprisingly, vibrating things are the source of vibrational kinetic energy. While objects colliding with one another produce translational kinetic energy, objects moving create rotational kinetic energy.

Given:

Mass- 0.43kg

Velocity- 15

kinetic energy = 1/2 mv²

kinetic energy of the ball = 1/2 (0.43)(15)²

kinetic energy of the ball = 48 J.

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Ionising radiation such as alpha and beta particles or gamma rays are detected using the Geiger-Müller (GM) tube. The radiation enters the tube through a very thin window at one end.

A radioisotope used for diagnostics must generate enough gamma rays to escape from the body and have a short enough half-life to decay away shortly after imaging is concluded. Tc-99 is the most often used radioisotope in medicine, accounting for approximately 80% of all nuclear medicine treatments.

Nuclear imaging is used to study the function of organs and tissues. During the operation, a trace amount of a radioactive chemical is used to aid in the examination. Body tissue absorbs the radioactive substance, known as a radionuclide (radiopharmaceutical or radioactive tracer).

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Magnitude of the acceleration would be 36 m/s^2.

Force is nothing but an influence that can change the motion of object or can make changes into the object. Sometimes we apply force but still there is no effect. Mathematically when object comes into motion after applying force, Force is the product of the mass of the object and the accelerations of the body, so we can write

F = ma

now putting the values, we can get that force is

F = 0.25 x a

a = F/0.25

a = 9/0.25

a = 900/25

a = 36 m/s^2

Hence the acceleration would be 36 m/s^2.

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Answer:

a = − 1.579 [tex]\frac{m}{s^{2} }[/tex]

b. t = 3.52s

We have velocity in km/hr and displacement in m. Since we have to make a unit conversion, might as well do it so it will yield the answer in the normal (SI) units for acceleration.

u = 100 x [tex]\frac{5}{18}[/tex] = 27.78 [tex]\frac{m}{s}[/tex]

v = 80 x [tex]\frac{5}{18}[/tex] = 22.22 [tex]\frac{m}{s}[/tex]

Using the formula of motion [tex]v^{2} - u^{2}[/tex] = 2*a*d

[tex](22.22)^{2}[/tex] - [tex](27.78)^{2} \\[/tex] = 2 * a * 88

a = -1.579 [tex]\frac{m}{s^{2} }[/tex] = acceleration

Since the acceleration was constant, we can use the average velocity, and the distance to determine the time.

time = [tex]\frac{displacement}{speed}[/tex]

t = [tex]\frac{88}{speed}[/tex]

speed = [tex]\frac{1}{2}[/tex] * (u+v) = [tex]\frac{1}{2}[/tex] * (22.22 + 27.78) = 25[tex]\frac{m}{s}[/tex]

t = [tex]\frac{88}{25}[/tex] = 3.52 s

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The acceleration of the car is equal to -1.58 m/s. The time required for the given decrease in speed is equal to 3.52 s.

The equations of motion can be utilized to describe the relationship between the acceleration, velocity, time, and displacement of a moving object.

The equations of motions can be mathematically expressed as shown below:

[tex]v = u + at\\S= ut +\frac{1}{2}at^2\\ v^2-u^2 = 2aS[/tex]

Given, the initial velocity of the police car, u = 100 Km/h = 27.78 m/s

The final velocity of the car, v = 80 Km/h = 22.22 m/s

The displacement of the car, S = 88m

From the third equation of motion: v²- u² = 2aS

(22.22)² - (27.78)² -  = 2 × a × 88

a = - 1.58 m/s²

Calculate the time from the first equation of motion: v = u + at

22.22 = 27.78 + (-1.58) × t

t = 3.52 sec

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The solar system when the milky way galaxy collides with the andromeda galaxy in billions of years will likely be unharmed.

For milky way galaxy,

For Andromeda galaxy,

When these galaxies collide in about 5 billion years from now, the central black hole of Andromeda galaxy with a mass of 100 million suns will swallow up the central black hole of milky way galaxy with a mass of 4 million suns.

Therefore, the solar system when the milky way galaxy collides with the andromeda galaxy in billions of years will likely be unharmed.

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The angular speed of the skaters is 0.7rad/s  and the kinetic energy of the two-skater system is 98 J.

Kinetic energy = m[tex]v^{2}[/tex] = 98J

Angular speed = 0.7 rad/s

A force needs to be applied if we want to accelerate an object. We must use effort to apply a force. The object will be moving at a new constant speed once the operation is finished and energy has been transferred to it. Kinetic energy, which is the energy that is transferred and is based on the mass and speed attained, is what causes motion.

It is possible for kinetic energy to move from one item to another and change into other types of energy. An encounter between a flying squirrel and a chipmunk, for instance, might occur. Some of the squirrel's initial kinetic energy may have been passed to the chipmunk after the collision, or it may have been converted to another kind of energy.

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The maximum voltage that can be applied to the whole network is 39.46V.

The explanations given here are that Power equals current times Voltage (P=VxI), Voltage equals Power divided by current (V=P/I), and current equals Power divided by Voltage (I=P/V).

Power and Voltage:

The equation for the relationship between power, resistance, and voltage is

P = V²/R

P is for power,

R stands for resistance,

and V for voltage.

Given that the resistors

V = [tex]\sqrt{PR}[/tex]

Consequently, the maximum voltage for the 2.8k resistor will be:

V = [tex]\sqrt{(0.2)(2800)}[/tex]

V = 23.66V

The maximum voltage for the 2.1k resistor will be similar:

V = [tex]\sqrt{(0.2)(2100)}[/tex]

V = 20.49V

This is lower than the 2.8k resistor's maximum voltage.

The voltage between the 2.8k and 2.1k resistors must be same because they are connected in parallel.

The highest voltage that can be applied across this parallel configuration is 20.49V since a voltage of 23.66V would be too high for the 2.1k resistor to handle.

Similarly, the voltage drop across the series-connected 1.8 k resistor is:

V = [tex]\sqrt{PR}[/tex]

V = [tex]\sqrt{(0.2)(1800)}[/tex]

V = 18.97V

Consequently, the highest voltage that can be used over the entire network is

20.49V + 18.97V = 39.46V

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Speed of the command module relative to earth just after the separation is 5785.2Km/h

Velocity of speed of Vehicle = 5800km/h

mass = 4m + m = 5m

relative velocity = v2 - v1 = 74 km/h

v2 = 74 + v1

using conservation of momentum,

(5800)(5m) = 4m(v1) + m(v2)

V1 = 5785.2km/h

Momentum in Newtonian physics is defined as the sum of an object's mass and velocity, or more specifically, as its linear momentum or translational momentum. As a vector quantity with both a magnitude and a direction, it has both. The momentum of an item is expressed as follows: if an object has mass (m) and velocity (v), both of which are vector quantities.

The newton-second is a unit of measurement for momentum in the International System of Units (SI), and the kilograms metre per second (kg m/s) is its SI counterpart.

A body's momentum changes at a rate equal to the net force exerted on it, according to Newton's second law of motion. However, in any inertial frame, momentum is independent of the frame of reference.

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