A 65-kg swimmer pushes on the pool wall and accelerates at 6 m/s^2. The friction experienced by the swimmer is 100 n. What is the magnitude of the force that the swimmer applies on the wall?.

Answer:

C

Explanation:

The velocity vs time graph will show how the velocity is changing with time as the object falls

As the growing Jovian planets trapped gas from the solar nebula, the gas formed swirling disks around them, and condensation within those disks formed moons.

The moons formed from the largest protoplanets that cleared the solar nebula of gas. Jovian planets are much more like the Sun than the Earth.

Jovian's many moons are one of the unsolved mysteries of the formation of the solar system. Jovian planets formed far from the Sun, where ice and rock were abundant. The core quickly grew into a large mass of ice and rock.

Eventually, they grew so  large that their enormous gravitational pull trapped large amounts of hydrogen and other gases from  surrounding nebulae. These condensed to form enormous moons.

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The energy stored in the object due to its position is potential energy.

Potential energy can be defined as the energy that the body posses due to the virtue of its position.

For example,

If any object of mass M is taken to a height h above the surface of Earth then the potential energy stored in the object will be given by the formula,

U = Mgh

Where g is the gravitational acceleration.

Here, we can see that if the mass of the body is constant then the potential energy of the object is depending on the vertical position of the object from the surface of Earth.

So, we can conclude here that the energy stored in the body due to its position is potential energy.

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When a system absorbs 2,500 J of heat and exerts 7,655 J of work on its surroundings, its internal energy changes by - 5,155 J.

The fundamental concepts of internal energy, heat, and system work are used in the derivation of the first law of thermodynamics. According to this thermodynamic law,  the change in internal energy of the system is equal to the heat contributed to a system minus the work done by the system.

The formula for this is given as ΔU = Q - W where ΔU is the change in internal energy, W is work done by the system, and Q is the heat added to the system.

Given the heat absorbed is 2,500 J and the work done is 7,655 J. Then, the change in the internal energy is,

ΔU = 2,500 J - 7,655 J = -5,155 J.

The answer is -5,155 J.

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The number of loops in the output coil are 238 loops.

In a step-up transformer, the relationship between the number of turns in its primary coil Np, the number of turns in its secondary coil Ns, the input voltage Vp, the output voltage Vs, the input current Ip and the output current Is is given by:

Ns/Np = Vs/Vp = Ip/Is

Now, we need the relation between number of loops and current:

Ns/Np = Ip/Is

Given that, Np = 238 loops

Ns = ?

Ip = 2 A

Is = 2 A

Now, let us put the values in the above relation.

Ns = Ip/Is * Np = 2/2 * 238 = 238 loops

Thus, number of loops in output coil are 238 loops.

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The difference between the measure of weight of a piece of lead in air and water is due to the buoyancy force of water. Difference between the two readings on the scale is 50.

Volume of lead is ratio of the weight it to the density of the lead. Thus,

= V = W/ρ

The value of the density for the lead material is 11.3 g/cm cubed.

The volume of the lead = 50 cm³

The experiment was performed two times, once in the air and once in water. As the density of the lead is 11.3 gram per cm cubed, the weight of the lead is =

= W = V X ρ

= W = 11.3 X 50

= W = 565 g

Hence, the total weight of the piece of lead is 565 grams.

If the air force is negligible then the weight of the piece of lead is 565 grams when the experiment is done in the air with spring scale.

The density of the water is 1 gram per cubic centimetre of water and the buoyancy force applied by the water on the piece of lead with 50 cm³ volume is 50 g.

Thus, the weight of the piece of lead when the experiment is done in the water with spring scale is=

= W' = 565-50

= W' = 515 g

Thus, the weight of the piece of lead when the experiment is done in the water with spring scale is, 515 grams.

Difference between the two readings on the scale =

= 565 -515

= 50g

Hence, the difference between the two readings on the scale is 50g.

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By utilizing the idea of parallax, we can decide how cosmologists decide distances to stars.

Presently, we perceive how parallax estimations can be utilized to decide the distances, one of the realities we know is that if we have any desire to gauge the distance of divine bodies, we are familiar with the parallax, first and foremost, point. That's what it intends assuming we can quantify tiny parallax points, we can gauge enormous distances moreover.

The purpose for why we can not make precise estimations of parallax past a specific distance is that as the distance of the star from earth builds the parallax point turns out to be tiny.

Subsequently, presently we comprehend how parallax estimations are utilized.

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If the mass of the cylinder decreases, the temperature of the water decreases, because  lesser the  mass means the cylinder has less potential energy that can be converted to thermal energy, decreasing the temperature of the water.

Potential energy is a form of stored energy that is dependent on the relationship between different system components. When a spring is compressed or stretched, its potential energy increases. If a steel ball is raised above the ground as opposed to falling to the ground, it has more potential energy.

The temperature of the water falls as the cylinder's mass drops because a smaller cylinder has less potential energy that can be converted to thermal energy, which lowers the temperature of the water.

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The Correct option is C. Zero net torque acts on each part of the system.

In Newtonian mechanics, momentum (extra especially linear momentum or translational momentum) is fabricated from the mass and velocity of an object. it's far a vector quantity, possessing a value and a course. If m is an item's mass and v is its pace (additionally a vector amount), then the object's momentum p is :P = mv.

In view that momentum has a route, it is able to be used to are expecting the resulting path and pace of movement of objects after they collide. underneath, the fundamental houses of momentum are defined in a single size. The vector equations are almost the same as the scalar equations. Momentum, a manufactured from the mass of a particle and its velocity. Momentum is a vector amount; i.e., it has both value and course. Isaac Newton's second law of motion states that the time rate of exchange of momentum is identical to the pressure acting on the particle. See Newton's laws of motion.

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Answer:

The velocity of a non-relativistic electron can be calculated using the formula v = h / mλ, where h is Planck's constant, m is the mass of the electron, and λ is the de Broglie wavelength of the electron.

Assuming the mass of the electron is 9.11 x 10^-31 kg, the velocity of the electron can be calculated as follows:

v = (6.63 x 10^-34 m^2 kg / s) / (9.11 x 10^-31 kg * 3.637 x 10^-9 m)

This works out to be approximately 5.82 x 10^6 m/s.

However, it's important to note that the de Broglie wavelength of a particle is generally only considered to be a meaningful quantity when the particle is moving at speeds that are comparable to the speed of light. For non-relativistic particles, such as an electron moving at a low velocity, the de Broglie wavelength is not a well-defined concept. Therefore, it's not meaningful to calculate the velocity of an electron based on its de Broglie wavelength.

Explanation:

Answer: 2 x 10^5 m/s

Explanation:

de Broglie wavelength equation: λ = h / mv

v = h / m · λ

m = 9.11 x 10^-31 kg

h = 6.62 x 10^-34 J·s

λ = 3.637 x 10^-9 m

v = (6.62 x 10^-34 J·s) / (9.11 x 10^-31 kg) (3.637 x 10^-9 m)

v = 199800.3807 = 2 x 10^5 m/s

When the frequency of the light is increased, the stopping potential also increases. In your case, the stopping potential for a light of wavelength 200 nm is 1.93 V.

The photoelectric effect is the phenomenon in which electrons are emitted from a surface when exposed to light. In a photoelectric effect experiment, the stopping potential is the minimum voltage required to stop the electrons from being emitted. The stopping potential increases as the frequency of the light increases.

In this experiment, a light of wavelength 200 nm was used to illuminate the cathode, and the stopping potential was found to be 1.93 V. This indicates that the frequency of the light was just high enough to cause the electrons to be emitted, but not high enough to cause a larger potential to be required to stop the electrons. Therefore, if the frequency of the light increases, the stopping potential will also increase.

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The enthalpy of vaporization of the system is obtained as 23.6 kJ/mol.

We know that we can be able to obtain the enthalpy of vaporization from the vapor pressure of the system at two different temperatures that have been given in the question.

Given that;

ln(P2/P1) = -ΔHvap/R(1/T2 - 1/T1)

P2 = final pressure

P1 = initial pressure

ΔHvap = enthalpy of vaporization

T2 = final temperature

T1 = initial temperature

Then;

ln(135/24.3) = -ΔHvap/8.314 (1/325 - 1/273)

1.7 =  -ΔHvap/8.314 (0.0031 - 0.0037)

1.7 =  -ΔHvap/8.314 (-0.0006)

1.7 = 0.0006ΔHvap/8.314

ΔHvap = 1.7 * 8.314/0.0006

= 23.6 kJ/mol

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Answer:

strong force

Explanation:

check answer

The momentum of the probe after the retrorocket ceases to fire is 9.9 * 10^7 Kg m/s

We know that the momentum of an object has to do with the product of the mass and the velocity of an object. The momentum of an object is a vector quantity and the direction of the momentum is the direction of the velocity of the object that is in motion.

According to the Newton second law of motion, we know that the rate of change of the momentum is equal to the impressed force that is acting on the body.

We know that;

[tex]F_{t}[/tex] = [tex]p_{f}[/tex] -[tex]p_{i}[/tex]

F = force

t = time taken

[tex]p_{f}[/tex]= final velocity

[tex]p_{i}[/tex] = initial velocity

[tex]p_{f}[/tex] = [tex]F_{t}[/tex]  + -[tex]p_{i}[/tex]

[tex]p_{f}[/tex] = (2.0 * 10^6 * 12 s) + 7.5 * 10^7

[tex]p_{f}[/tex]  = 2.4 * 10^7 + 7.5 * 10^7

[tex]p_{f}[/tex]  = 9.9 * 10^7 Kg m/s

Hence, the momentum of the retrorocket is 9.9 * 10^7 Kg m/s.

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Missing parts;

A  space probe is traveling in outer space with a momentum that has a magnitude of  7.5 * 10^7 kgm/s. A retrorocket is fired to slow down the probe. It applies a force to the probe that has a magnitude of 2.0  * 10^6 N and a direction opposite to the probe's motion. It fires for a period of 12 s. Determine the momentum of the probe after the retrorocket ceases fire.

The volume of the cavity is 5cm³

Calculation :

Volume = [tex]\frac{Mass}{Density}[/tex]

              = [tex]\frac{155}{19.3}[/tex]

             =  8.03 cm³

Volume of Cavity = 13cm³ - 8.03cm³

Cavity quantum optics, for example, deals with the interaction of photons and molecules in an optical cavity confined between two closely spaced mirrors. A perfect optical cavity can only support light of a certain frequency and amplify the strength of the associated electromagnetic field

In a co-fired ceramic semiconductor package, the area intended for die attachment. The nominal area is defined by the bond finger limits.

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To find the volume of the cavity, the major parameter missing is the diameter of the cavity itself. we can obtain this using the following steps:

Weight of the cavity  = Weight of sculpture in air  - Weight of sculpture in water

Weight of cavity  = 11.29N  -  9.190N = 2.1N

Weight  = mass x acceleration due to gravity

       Mass  1 = 1.55kg

       Mass 2 = 1.42 kg

So;

Volume of substance can be determined from the density.

Density  =   mass/volume

  Volume  =   mass/density

Now insert the parameters and solve;

 Volume  =    = 1.1 x 10⁻⁵m³

Therefore, the volume of the cavity inside is 1.1 x 10⁻⁵m³.

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The month which has an average daily temperature of around 41 degrees is May. Hence, option A is the correct.

A thermometer is a device used to gauge a system's temperature. In a broad variety of activities, including as industry, science and research, and medical treatment, temperature measuring is crucial.

Galileo Galilei, an Italian mathematician, and physicist, is largely credited with developing the thermometer. In his device, constructed in 1592, a glass vessel's inversion caused the air inside to expand or contract, which in turn altered the amount of liquid that was half-filled into the vessel's long, accessible neck.

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The change in the internal energy of the system will be 500J.

Internal energy is a state function. It depends only on the state of the system and not on the method used to achieve that state.

Let's change the internal energy of the system by doing adiabatic process. There are two ways to do this.

(1) By the mechanical work of turning a series of small paddles.

(2) By electrical work using a dipstick.

It is determined that the temperature rises from T1 to T2 by the same amount. Thus, the same work done, regardless of how it is done, produces the same change in state, measured as a change in temperature.

Q=u+w

u=Q-w

u=2000-2500=500 J

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Answer:500J

Explanation:

The galaxy that our solar system belongs to is known as “The way of chopped hay galaxy” or “The Milky Way galaxy ” It takes an oval shape with coiled spiral arms extending from it, and the Sun lies on one of these spiral arms. The solar system consists of the Sun, the Planets, the Moons, the Asteroids, the Meteors, the Meteorites & the Comets.

(a) General expression is R = ∛T²GM/4π²

(b) The mass of the planet in geosynchronous orbital period is  4.9 * 10²⁵ kg.

What is the orbital period?

We know that the solar system is composed of the sun and the planets. The planets are known to move around the sun in concentric circles. Following the heliocentric model of the solar system, the sun is at the center of the solar system at all times and all the other planets tend to move round the sun at a good distance that is appropriate for each.

Now we have that;

T = √4π²r³/GM

T = period of the orbit

r = radius of the orbit

G = gravitational constant

M = mass of the planet

Hence, we have;

R = ∛T²GM/4π²

8.98 * 10⁷ m =∛ (26 * 60 * 60)² * 6.67 * 10⁻¹¹ * M/ 4 * (3.142)²

8.98 * 10⁷ m * 39.49 / ∛2.86 * 10¹⁸ = M

M = 4.9 * 10²⁵

Therefore, the mass of the planet in geosynchronous orbital period is  4.9 * 10²⁵ kg.

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Torque delivered was = 319.4 Nm

The power of an automobile crankshaft transfers energy from engine to axel is = 41.8 kw

angular speed = 1250 rev/min

power consumed is,

P = τω

here τ = torque

τ = P/ω

τ = 41.8 X 10³/ 1250 X 2π/ 60

τ = 319.4 Nm

Therefore, the torque delivered was = 319.4Nm

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3.00 moles of magnesium are present in a sample of magnesium with a mass of 72. 9 g.

An estimation of the volume of material that makes up or is contained within a physical body. According to classical physics, an object's inertia and mass are connected because of the force needed to accelerate an item.

The amount of matter that makes up any item or body is best referred to as its mass. All of the objects we perceive have mass. There is mass in objects like tables, chairs, beds, footballs, glasses, and even air. As a result, every thing has a mass, which determines whether it is light or heavy.

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here, we have given kinetic energy = 3.2 J

mass= 428.5 kg = 0.4285 gm

so now we know,

K.E = [tex]1/2mv^{2}[/tex]

v= [tex]\sqrt{2K/m}[/tex]

v= [tex]\sqrt{2*3.2/0.4285}[/tex]

v=[tex]\sqrt{14.94}[/tex]

v=3.86 m/s.

at 3.86m/s object will be moving to possess a kinetic energy of 3.2 j.

kinetic energy.

v= velocity

m= mass

K.E = kinetic energy

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At a distance of 120.0 meters beneath the water surface, a submarine must resist pressure of 1200kPa.

h=120m

1 g/cm3 equals 1000 kg/m3 for p water.

P atmosphere equals 101.3 kPa

Total P =?

water = density *g*h

=1000*10*120

=1200000Pa

=1200kPa

P total = 1200 kPa plus 101.3 kPa equals 1301.3 kPa

The pressure on the hull increases by one atmospheric (1 bar, 14.7 psi, 101 kPa) for every 10 meters (33 feet) in depth, therefore at 300 meters (1,000 feet), the hull is able to resist 30 environments (30 bar, 441 psi, 3,000 kPa) with water pressure.

Therefore, gauge pressure plus atmospheric pressure add to the overall pressure, also known as absolute pressure:

Pabs=Pg+Patm Pabs is indeed the unconditional pressure, Pg is the gauge pressure, and Patm is the air pressure. P abs = P g + P atm

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The average kinetic energy of molecules of an ideal gas doubles if the temperature doubles.

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The frequency of a light wave with a wavelength of 6.0 × 10⁷ and a speed of light of 3 × 10⁸ will be equal to 5.

The distance between two identical locations (adjacent crests) in successive cycles is known as the wavelength, and it is used to describe waveform signals that are transmitted over wires or into space.

Typically, in wireless systems, this length is specified in meters (m), centimeters (cm), or millimeters (mm). The wavelength is more frequently described in nanometers (nm), which are units of 10⁻⁹ m, or angstroms, which are units of 10⁻¹⁰ m, for infrared (IR), visible light (UV), and gamma radiation.

The wavelength of the light, λ = 6.0 × 10⁷

Then the frequency of the light will be,

λ = c/f

f = c/λ

f = (3 × 10⁸)/(6.0 × 10⁷)

f = 5

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Sleep is very crucial in development of our muscular system. During sleeping blood flow in our body is most efficient.

One investigation discovered that a solitary evening of lacking rest didn't reduce how much power muscles can produce, yet a few sequential evenings of too little rest did. In this way, it's anything but a useful example to get into in the event that you're attempting to get more grounded, less fatty, and fabricate more characterized muscles.

High quality sleep is a fundamental component of living, and it has many advantages for wellbeing and prosperity. It could actually affect how your muscles become stronger preparation. Most grown-ups need somewhere in the range of 7 and 9 hours of rest each evening. There is such an incredible concept as getting an excess of rest as well.

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By resolving the ratios of measurements you can dilate an image with scale factor.

The size of the enlargement/reduction is represented by the scale factor.

For example, a scale factor of 2 means that the new shape is twice the size of the original shape. A scale factor of 3 means that the new form is three times the size of the original form.

To calculate the scale factor, use the following formula:

Enlarge = Large/Small

Reduce = Small/Large

You can get "Large" and "Small" from the corresponding sides of the diagram.

Refer Fig :- Triangle DEF lies between the origin of triangle ABC and point O, the center of dilation, because the scaling factor is less than 1. Triangle ABC is between dilated triangle GHI and the center of dilation because the scaling factor is greater than 1. Moreover, all three triangles are similar.

The closer the scale factor is to 1, the closer the magnified triangle image is to the original image. Triangle ABC is expanded by a factor of to produce triangle DEF.

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The meter stick weighs 204.11cm. A meter stick is a measurement tool that measures one meter (hundred centimeters) and is used to measure things in meters and centimeters.

In physics, mass is a way to measure inertia, a fundamental property of all matter. It essentially refers to a body of matter's resistance to changing its speed or position in response to the application of a force. The change produced by an applied force is smaller the more mass a body has.

Let us assume the following items

x1 = 50 cm;

m2 = m3 =  3.78 g;

x2 = x3 = 33.4 cm;

xcm = 48.8 cm

Xcm = m₁x₁ + m₂x₂ + m₃x₃ / m₁ + m₂ + m₃

48.8cm = m₁ ₓ50 + 3.78 ₓ 33.4 + 3.78 ₓ 33.4 / m₁ + 3.78 + 3.78

48.8m₁ + 7.56 = 50m₁ + 126.25 + 126.25

48.8m₁ - 50m₁ = 244.94

₋1.2m₁ = 244.94

m₁ = ₋244.94/₍1.2

m₁ = 204.11cm.

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The magnitude of the magnetic field inside the solenoid is 0.00571Tesla.

The radius of the solenoid = 95.00cm

The number of turns = 1200

the current flow = 3.60

The formula of the magnetic field inside the solenoid is

                                    B = μ0.i.n=μ0i(N/L)  

                                     B = 4π × 10^(-7).(3.6).(1200/95)

                                     B = 0.00571 Tesla

Hence, The magnitude of the magnetic field inside the solenoid is 0.00571Tesla.

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10 w night light left on for 18 hr is consumes more energy.

a 1 kw hair dryer used for 10 min.

energy consumes = 1kw * 10* 60 = 600kJ.

a 10 w night light left on for 18 hr

18Hr = 18 * 60 * 60 = 64800 sec

Energy consumes = 10 * 64800 =648000 J. = 648 kJ.

Since, 10 w night light left on for 18 hr consumes more energy.

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