Is 5 hours of sleep enough?

If 2.0 kg of steam at 100 o C and 10.0 kilogram of ice at 0 o C are combined, the resulting mixture will be hotter than 50 degrees. In its gaseous state, water is steam.

This might happen as a result of boiling or evaporation, where heat is provided until the water achieves the enthalpy of vaporization. Although wet steam, the visible mist or aerosol of water droplets created as water vapour condenses, is sometimes referred to as "steam," saturated or superheated steam is invisible. The concept of temperature is used to convey quantitatively how hot and cold something is. Using a thermometer, one can gauge temperature. Thermometers are calibrated using a variety of temperature scales, which historically drew on a variety of reference points and thermometric substances.

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The boat is moving at a speed of 2.0 m/s when crossing the river.

Step 1: Determine the boat's velocity in relation to the river by deducting the river's current from the boat's speed in still water.

Boat speed in relation to the river is equal to 8.0 m/s minus 6.0 m/s, or 2.0 m/s.

In Step 2, multiply the boat's angular velocity to the stream by both the lake's current to determine how fast the sailboat will be traveling across the water.

Boat's river crossing speed is calculated as 2.0 m/s plus 6.0 m/s, which equals 8.0 m/s.

Because of this, the boat is moving at 8.0 m/s as it crosses the river.

An object's mass and the force being exerted towards it both affect how quickly it moves. The speed of an object's movement increases with increasing force. It will travel more slowly the more mass an object has. This is so that the item can be accelerated by the pressure towards the extent that the mass permits.

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The difference between the mass of a proton and an electron is 9.99 X 10⁻²⁸ Kg.

Mass of a proton = 1.67 X 10⁻²⁴ g

Mass of an electron = 9.1 X 10⁻²⁸ g

Converting Mass to Kilogram,

Conversion factor: 1kg = 1000 g

Mass of a proton = 1.67 X 10⁻²⁷ g

Mass of an electron = 9.1 X 10⁻³¹ g

Difference in their masses would be,

= Difference = Mass of proton - Mass of electron

= Difference = ( 1.67 X 10⁻²⁷ ) - ( 9.1 X 10⁻³¹ )

= Difference = 9.99 X 10⁻²⁸ Kg

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Muscle strength is measured by estimating a person's one repetition maximum (1RM).

1RM is a measurement of the greatest load (in kilograms) that one can move means it can be lifted, pushed, or pulled once without failure or injury.

1RM is calculated by counting the maximum number of exercises that you can do in repetition by the use of a load that is just less than the maximum amount that can be moved. This number is known as the repetitions to fatigue (RTF) – you are required to stop counting the repetitions when you feel you can no longer do the exercise in a proper way or when you slow down or can't keep a steady pace.

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537N thermal energy is created by friction during his descent.

The friction-related work is converted into thermal energy.

If Justin is initially at rest, MGH is his potential energy.

Thus, we have 30* 9.8*8 = 2352N.

Where,

Mass = m

Gravitational acceleration = g

Height = h

His potential energy is changed into usable kinetic energy when he reaches the bottom of the slide, leaving us with 1/2 mv^2.

Finally, we arrive to 1/2 * 30 * (11)^2 = 1815N

He had 2352N at the outset, and 1815N at the conclusion.

The thermal energy is therefore 2352 - 1815 = 537N.

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The work is done by a force of 125 N while being moved 2.5 m is equal to 312.5 J.

Work done can be described as the energy needed when a force is applied to move an object through a definite displacement. The work done can be defined as both the applied force and the displacement of the object.

The function of the force is to move a body in a straight line in the direction of the exerted force over a distance 'd'.

W= F × d

Where 'd' is the displacement, 'F' is the applied force and W is the work done.

Given, the force applied on the object, F  125 N

The displacement by the object, d = 2.5 m

The work done by the object can be calculated as:

W = F.d

W = 125 ×2.5

E = 312.5 J

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Answer:

The boat moves away from the dock, he won't be able to grab the line

Explanation:

When he jumps, he applies a force to the boat and the boat exerts a force equal in magnitude and opposite in direction to the force he applied.  Because the friction is very low between the bottom of the boat and the water, the boat moves away from the dock.  He won't be able to lean over and grab the line.  This is Newton's 3rd Law of Motion.

The order of steps through which a particle of gaseous water travel is evaporation, Convection, precipitation and collection.

The gaseous particle of water also called water vapor will first evaporate and goes high into the clouds and follow the process of condensation, after condensation the water will fallback on the land in the form of rain this process is called raining.

When water goes into the high mountain ranges and then collects in water body, this process is called precipitation and collection respectively. Then again water which is in liquid form becomes what a vapour by following the process of convection.

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With a plane mirror, the distance of the image behind the mirror is infinitely far. The greatest distance behind the mirror at which the image can be found is infinite.

For plane mirrors, the object distance is equal to the image distance and hence, the image is the same distance behind the mirror as the object is in front of the mirror.

The image distance from mirror does not depend on the distance of the observer from mirror. Therefore, if we change the object's distance then only the image distance or distance between object and image will be affected.

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When the switch is closed, in the third circuit the resistance would be the highest and the current be the lowest.

From the question, we have

Voltage in the circuit, V = 1.5 volts,

The circuit's resistance, R = 50,

In the third diagram, the bulb is connected in parallel, which means that the voltage in the circuit will remain constant. Additionally, because the current depends on the resistor, the resistance in this circuit will be larger.

Additionally, according to Ohm's law, a high resistance will result in a low current flow.

Since there is only one bulb in the first circuit, resistance will be minimal and current flow will be high.

As a result, the third circuit's resistance would be the highest and its current the lowest when the switch is closed.

Current :

The phrase "electric current" is frequently used to describe how much electricity flows through a circuit and how it flows in an electronic circuit. Amperes are used to measure it (A). As more electricity passes through the circuit, the ampere value increases.

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When the switch is closed, in the third circuit the resistance would be the highest and the current be the lowest.

What is current?

When describing how much electricity flows through a circuit and how it flows in an electronic circuit, the term "electric current" is often employed. It is measured in amperes (A). The ampere number rises as more electricity flows through the circuit.

Given:

The Voltage in the circuit, V = 1.5 volts,

The resistance in the circuit, R = 50 Ω,

As you can see in the third diagram, there is a parallel connection of the bulb, so the voltage in the circuit will remain the same and the current depends on the resistor, so there will be higher resistance in this circuit.

And if the resistance is high the current flow will be low, (By Ohm's law)

In the first circuit, there is only one bulb, so resistance will be low, and the current flow will be high.

Therefore, when the switch is closed, in the third circuit the resistance would be the highest and the current be the lowest.

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The strong force, which is thought to hold atoms' nuclei together and is even stronger than the Coulomb force at close ranges, was postulated by physicists as a result of Coulomb's law inside the nuclei of atoms.

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The hubble constant is about 70 km/s/mpc. you measure the redshift of four galaxies. the first has a redshift of 1500 km/s, the second has a redshift of 750 km/s, the third has a redshift of 5000 km/s and the fourth has a redshift of 2000 km/s. Andromeda is the closest galaxy.

A galaxy is made up of gravitationally bound clusters of stars, stellar debris, interstellar gas, dust, and dark matter. The word "galaxias" is a Greek word that means "milky" and alludes to the Milky Way galaxy, which is where the Solar System is located. Hubble constant, galaxies range in size from dwarfs, which have less than 100 million stars, to supergiants, which have more than 100 trillion stars. All of these stars orbit the galaxy's center of mass. Galaxies have an average of 100 million stars. Stars and nebulae make up a very small portion of the material of a typical galaxy; dark matter makes up the majority of the galaxy's mass. Typically, galaxy cores contain supermassive black holes. Galaxies can be characterized as elliptical, spiral, or irregular based on their visual shape. [6] Many of them are thought to have supermassive black holes in their cores. The main black hole of the Milky Way.

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The two-neuron chain allows increased communication and control of the effector organ is true.

Preganglionic and postganglionic neurons make up the link in the ANS between the CNS and its effector. Outside of the central nervous system, in an autonomic ganglion, is where these two neurons synapse.

The two-neuromuscular chain enables improved communication and regulates the effector organ. The sympathetic division is where the cell bodies of preganglionic neurons are found.

The brainstem or spinal cord of the central nervous system houses the preganglionic neurons' cell bodies (CNS).

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The volume of the oort cloud that is in the shape of sphere is 5.2 * 10¹⁴ au³.

We know the volume of sphere as V = 4/3 * (πr³)

where, V is the volume

r is the radius of the sphere

Given that, radius of oort cloud is r = 50000 au

The volume of the oort cloud can be calculated as follows.

V = 4/3 * (πr³)

π is substituted as 22/7

V = 4/3 * 22/7 * 50000³

⇒ 88/21 * 125 * (10⁴)³

⇒ 523.8* 10¹²

⇒ 5.238 * 10¹⁴

Hence, the volume of the oort cloud that is in the shape of sphere is 5.2 * 10¹⁴ au³.

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Answer:

Zero I think I'm not sure

The magnitude of the net torque on the wheel due to these three forces for an axis perpendicular to the wheel and passing through its center is

¹/₂MR³a.

The net torque on the wheel is determined from the moment of inertia of the pulley and the angular acceleration.

∑τ = Iα

where;

the moment of inertia of the axis perpendicular to the wheel and passing through its center is calculated as;

where;

a is the acceleration due to the applied force.

Thus, the magnitude of the net torque on the wheel due to these three forces for an axis perpendicular to the wheel and passing through its center is ¹/₂MR³a.

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The wavelength of radiation is 1.428 x 10⁻⁶m.

The equation E=hf is called the Planck relation or Planck-Einstein relation. The letter h is named after Planck as Planck's constant. Energy (E) is related to this constant h and the frequency (f) of the electromagnetic wave.

In quantum wave theory, the Planck relation describes the shear wave energy emitted or absorbed as an electron transitions between energy levels within an atom. If the atom contains electrons, the destructive wave interference between the protons and electrons in the nucleus gives rise to destructive waves, resulting in binding energy. This binding energy is the energy of a photon emitted when an electron is captured or moves between states within an atom. Electron vibrations generate transverse waves, and photon energy is based on the frequency of that vibration.

c/y=v

c/v=y

3 x 10⁸/2.10 x 10¹⁴

1.428 x 10⁻⁶m

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The formula of string potential energy is equal to the product of force and distance of displacement.

Also, force is nothing but the product of spring constant and displacement.

The potential energy of the spring is calculated using the formula,

PE = 1/2* k* x²

where, k is spring constant

x is displacement

The potential energy of the spring is the potential energy stored as a result of the deformation of a particular elastic object, or a spring. It describes the work done to stretch a spring and depends on the spring constant k and the distance stretched.

The spring constant is the characteristic property of the spring. It depends upon the construction material and is measured in units of Nm⁻¹.

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The magnitude of the gravitational force exerted by ball A on ball B is equal to 36.31 × 10⁻¹¹ N.

Newton’s law of gravitation can be defined as every particle of matter in the universe attracting every other particle with mass with a certain force. The magnitude of gravitational force has a direct relationship with their masses.

Therefore, the gravitational force between two bodies can be written as:

[tex]\displaystyle F =G\frac{M_1M_2}{r^2}[/tex]

Where G denotes the universal gravitational constant.

Given, the mass of the Ball A = Ball B = 7 Kg

The separation between the two balls, r = 3 m

The magnitude of the gravitational force applied by ball A on ball B can be determined as:

[tex]\displaystyle F =6.67 \times 10^{-11} \times \frac{7\times 7}{(3)^2}[/tex]

F = 36.31 × 10⁻¹¹ N

Therefore, the gravitational force is equal to 36.31 × 10⁻¹¹ N.

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Wavelength is the property of light is responsible for the different colors.

The length that a periodic wave travels across in order to replicate its shape is known as its wavelength. It is the distance between two successive corresponding wave points of the same phase, such as two neighboring crests, troughs, or zero crossings, and it is a feature of both traveling waves and standing waves, as well as other spatial wave patterns. The spatial frequency is defined as the wavelength's inverse.. Additionally, sinusoidal wave envelopes, modulated waves, and waves created by the interference of several sinusoids are also commonly referred to as having a wavelength.

Wavelength. and frequency are inversely. related, assuming a sinusoidal. wave traveling at a constant. speed

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If the elevator is stopped, the scale reads what you would expect it to read, your weight in an elevator. There elevator is in equilibrium.

If you are on an elevator (on Earth), your mass is constant. However, if the elevator is moving (and you're on a scale), you'll notice that your weight changes depending on where the elevator is moving. The only possible factor that can explain this change is the acceleration of the object - you

When the elevator is moving, we will weigh our normal weight. Since we are already moving at the same speed as the elevator (up or down), nothing is affecting us to change our weight. However, when the elevator starts to go or stops, our body resists it.

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When we cook a marshmallow on a metal poker tool over an open flame, there are three ways in which heat energy is transferred: Conduction, convection, and radiation.

Heat transfer is the natural transfer of heat from an object with a higher temperature to an object with a lower temperature. Heat transfer can occur in three ways, namely conduction, convection, and  radiation.

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The ratio of current in both of the given resistors is I1  - R2

                                                                                     I2    R1

Here we have been given that two resistors which are  and  respectively are connected in parallel with a cell. We have been asked to find the current that is flowing through the resistor  to the current flowing through

The current in both the resistors will be different as we know that in parallel connection of the given resistors the current through each of them is different, but the voltage remains the same.

From ohm's law, we have,

V = IR      

Where V is the potential difference between the respective ends of the resistors, I is the amount of current flowing in the circuit and the R is the resistance.

Then we have,

Current (I1) in the  resistor is as follows:

I1 =V/R1

Current (I2) in the  resistor is as follows;

I2 =V/R2

The ratio of the currents in both the resistors is as follows;

I1/I2=V/R1

       V/R2

⇒ I1/I2=R2/R1

Therefore the ratio of current in both the resistors is    ⇒ I1/I2=R2/R1                                                                            

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Answer:

An elliptical galaxy is a type of galaxy in the Hubble sequence characterized by having a roughly ellipsoidal shape and hardly any distinctive features, lacking, for example, the spiral arms that characterize the homonymous galaxies. They are one of the four main classes of galaxies described by Edwin Hubble in his 1936 work The Realm of the Nebulae,1 along with spiral and lenticular galaxies. Elliptical galaxies (E) are, along with lenticular galaxies (S0) with their large-scale disks, and ES2​3​4​ galaxies with their intermediate-scale disks, a subset of the "early-type" galaxy population. ".

Most elliptical galaxies are composed of older, low-mass stars, with a sparse interstellar medium and minimal star formation activity, and tend to be surrounded by large numbers of globular clusters. Elliptical galaxies are thought to make up about 10-15% of the galaxies in the Virgo Supercluster, and are not the dominant galaxy type in the universe as a whole.5 They are found preferentially near the centers of galaxy clusters .6​

Elliptical galaxies range in size from dwarf ellipticals with tens of millions of stars, to supergiants with over a hundred trillion stars dominating their galaxy clusters. Originally, Edwin Hubble hypothesized that elliptical galaxies evolved into spiral galaxies, which was later found to be false,7 although the accumulation of gas and smaller galaxies can form a disk around a pre-existing ellipsoidal structure.8 9 The stars found within elliptical galaxies are, on average, much older than the stars found in spiral galaxies.7

Explanation:

The second polarizer's axis is positioned at a 90-degree angle, and the light intensity that passes through it is 0.

The incident light is ordinary light. it is unpolarised

I₁=I₀/2  For the first polarized

I₂=I₁cos²θ          (Second polarization)

 =I₀/2 cos²90°             (θ=90)

 =I₀/2(0)²

 =0

When an area is measured on a plane perpendicular to the direction of energy propagation, it is possible to define the intensity or flux of radiant energy as the power transferred per unit area. Watts per square meter (W/m2) and kg/s3 are the basic units for this system in the SI. The term "intensity" is most usually used to describe electromagnetic or acoustic waves, such as light or radio waves, where the average power transfer over the course of one wave period is taken into account. Any situation where energy is exchanged can be described as having intensity. The amount of kinetic energy that water drops from a garden sprinkler are carrying, for instance, might be calculated.

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The air around a pool and the water in the pool absorb the same amount of energy from the sun; however, the water requires more energy to increase its temperature than the air does.

Water has a higher specific heat capacity than air, meaning it requires more energy to increase its temperature by the same amount. This is because the molecules in water are more tightly bonded than those in air, so more energy is needed to break these bonds and increase the temperature.

Additionally, water has a higher latent heat of vaporization than air, meaning it requires more energy to evaporate and create steam. Therefore, the air experiences a greater increase in temperature than the water.

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6.626 x [tex]10^{-11}[/tex] m   is the shortest wavelength of these x rays.

Solution:

λ = h c/ΔE

λ = wave length

h = 6.626 x [tex]10^{-34}[/tex]  m² kg /s  = Planck constant

ΔE = 30 keV potential ( 1 keV = 1.6021 x [tex]10^{-16}[/tex] J)

c = velocity of light = 3 x 10⁸ m/s

Put these values in formula,

λ  =    (6.626 x  [tex]10^{-34}[/tex]  m² kg /s x 3 x 10⁸ m/s) / (30 x 1.6021x [tex]10^{-16}[/tex]  J)

   =    6.626 x [tex]10^{-11}[/tex] m

Hence, 6.626 x [tex]10^{-11}[/tex] m   is the shortest wavelength of these x rays.  

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When the angle between the dipole moment and electric field is 0°, the lowest amount of potential energy is present in an electric dipole.

Technically referred to as a magnetic dipole, a tiny current loop functions as a tiny magnet. The formula m = NIA, which results in the units - Ampere meter square, determines the power of that tiny magnet, the magnetic dipole moment m.

The electron's orbital angular momentum forms a 180° angle with the orbital magnetic moment's direction. Explanation: Given is the equation for the relationship between an electron's rotational momentum and its magnetic moment: = - e m e L e 2 m e L, where e and me are the electron's mass and charges.

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The speed of the travelling wave is found to be 0.0628m.

The time period is given to be 2 seconds.

The time period and the frequency are related as,

T = 2πv

Putting values,

2 = 2πv

v = 1/π Hz.

The relationship between the frequency of the wave, the wavelength of the wave and the speed of the wave is given by

V = fy

Where,

V is the speed of the travelling wave,

F is the frequency of the travelling wave,

y is the wavelength of the travelling wave.

The speed of the travelling wave is given to be 2 cm/s (0.02m/s) and the frequency of the travelling wave is 1/π.

Now, putting all the values,

0.02 = 1/πy

y = 0.0628m

So, the wavelength of the travelling wave is 0.0628m.

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The current in the circuit of resistance is 1.2 A.

Current is the rate of flow of charge round an electric circuit.

To calculate the current flowing in the circuit, we use the formula below.

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

Hence, the current is 1.2 A.

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