A river is moving east at vWE = 2.29 m/s. A boat starts from the dock heading θ = 39.3 degrees north of west at vBW = 7.18 m/s, relative to the water. The river is w = 1130 m wide.

What is the speed of the boat, in m/s, with respect to Earth?

Answer:

Post a picture of it

Explanation:

The orbital time period of the Saturn is 29.6 years

We are given that,

Distance from Sun to Saturn is = a = 1.43 × 10¹²

The mass of the Sun is = M =1.99 × 10³⁰kg

The Gravitational constant = G = 6.67 × 10⁻¹¹N-m²kg⁻²

To find the orbital period of Saturn we can use the equation ,

\(T^{2} = \frac{4\pi }{GM}a^{3}\)

Where, T is the orbital time period of the of the Saturn , M is the mass of the sun , G is the gravitational constant.

Therefore, after putting the value in above equation we can get,

\(T^{2} = \frac{4(\(3.14)^{2} }{(6.67*10)^{-11} )N-m^{2} kg^{-2}}(1.43*10^{12}) ^{3}m\)

\(T^{2} = \sqrt{8.688*10^{17} } s\)

\(T = 932094415.818s\)

So that , from above to convert the orbital time period of Saturn from second into year i.e. above seconds divided by seconds (1 sec = 3.154 ×10⁷ Earth years)

Thus, the orbital time period can be ,

\(T = 29.6 years\)

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Since, density of the bracelet is not equal to the density of gold, then, the bracelet is not pure gold.

To know if the bracelet is pure gold, we calculate the density of the bracelet and compare it to the density of pure gold (19.3 g/cm³).

That is, for the bracelet to pure gold,

Density of bracelet ≈ 19.3 g/cm³

Density can be defined as the ratio of the mass and the volume of a substance.

The formula of Density is give as

⇒ Where:

From the question,

⇒ Given:

⇒ Substitute these values into equation 1

Hence, since the density of the bracelet is not equal to the density of gold, then, the bracelet is not pure gold.

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The linear velocity of the ball whose angular velocity is 31.3 rad/s about the elbow joint will be 45.385 m/s.

Angular velocity is the rate of change of angular displacement with respect to time. Mathematically -

ω = dθ/dt

from this we can write -

dθ = ω dt

∫dθ = ω ∫dt

θ₂ - θ₁ = ω(t₂ - t₁)

Δθ = ω Δt

ω = Δθ/Δt

Given is a ball thrown from a net on the end of a stick by rotating the stick and forearm about the elbow. The angular velocity of the ball about the elbow joint is 31.3 rad/s and the ball is 1.45 m from the elbow joint.

The relation between linear velocity and the angular velocity of a body undergoing circular motion is given by -

v = rω

From this we can write -

ω = 31.3 rad/s

r = 1.45 m

Substituting the values -

v = rω

v = 1.45 x 31.3

v = 45.385 m/s

Therefore, the linear velocity of the ball whose angular velocity is 31.3 rad/s about the elbow joint will be 45.385 m/s.

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Answer: A flower pot falling

Explanation:

The car on the curve (its direction is changing) and the falling flower pot (its speed is changing) are both undergoing acceleration.

The pressure of the tank, when filled with water at a depth of 6 m, is approximately 580.124 atmospheres (atm). To calculate the pressure of the tank, one can use the equation: Pressure (P) = Density (ρ) × g × Depth (h)

Pressure (P) = Density (ρ) × g × Depth (h)

Given: Density of water (ρ) = 1000 kg/m³

Acceleration due to gravity (g) = 9.8 m/s²

Depth (h) = 6 m

Using the given values, one can calculate the pressure:

Pressure = 1000 kg/m³ × 9.8 m/s² × 6 m Pressure

= 58800 kg·m⁻¹·s⁻²

Now, let's convert the units to pascals (Pa) using the conversion 1 atm = 1.013 x \(10^5\) Pa:

Pressure = 58800 kg·m⁻¹·s⁻² × (1 atm / 1.013 x\(10^5\) Pa)

Pressure = 580.124 atm

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Answer:

h1/h2 = \(\frac{2R^2}{3R^2 + h^2}\)

Explanation:

Using two rolls of tissue paper : One roll dropped normally while the other drops as some holds onto a sheet of the toilet paper ( I.e. the tissue paper drops rotating about its axis )

Determine the ratio of heights  h1/h2

mass of tissues = same

radius of tissues = same

h1 = height of tissue 1

h2 = height of tissue 2

For the first tissue ( Tissue that dropped manually )

potential energy = kinetic energy

mgh = 1/2 mv^2  

therefore the final velocity ( v^2 ) = 2gH  ----- ( 1 )

second tissue ( Tissue that dropped while rotating )

gh = \(\frac{v^2}{u}\) ( 3 + \(\frac{u^2}{R^2}\) ) ------ ( 2 )

To determine the ratio of heights we will equate equations 1 and 2

hence :

gh = \(\frac{2gH}{u}\) ( 3 + \(\frac{u^2}{R^2}\) )

∴ h1/h2 = \(\frac{2R^2}{3R^2 + h^2}\)

Answer:

a fireworks display, a rocket is launched from the ground with a speed of 18.0 m/s and a direction of 51.0∘ above the horizontal. During the flight, the rocket explodes into two pieces of equal mass (see Fig. 8.32). (a) What horizontal distance from the launch point will the center of mass of the two pieces be after both have landed on the ground? (b) If one piece lands a horizontal distance of 26.0 m from the launch point, where does the other piece land?

Answer:

A. gravitational force always true.

B, C and D could be true under the correct conditions

After plugging all the data into the equation, the result of the relative centrifugal force (RCF)  is measured in terms of g.

The relative centrifugal force (RCF) or the g force is the radial force generated by the spinning rotor as expressed relative to the earth's gravitational force.

RCF = ac/g

where;

\(RCF = \frac{\omega ^2 r}{g} = 1.118\times 10^{-5} \ (RPM)^2 r = 11.18r\ (RPM/1000)^2\)

where;

Find the maximum RCF of the JS-4.2 rotor can be obtained from its maximum speed (4200 rpm) and its rmax (250 mm);

\(RCF = 11.18 \times 25\ cm \times (\frac{4200 \ RPM}{1000} )^2 = 4,930.3 \times g\)

Thus, after plugging all the data into the equation, the result is measured in terms of g.

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The given statement is false.

Atlanta which is in Georgia have high temperatures during summer.

Although Georgia is near ocean but Atlanta is landlocked.

This place is also located a bit towards the tropic of cancer and this altitude is near to the equator.

With such a location, it is justified for the summers to be hot.

But in comparison to car, medium sized homes tend to cool down faster.

This is because of the good ventilation in the houses.

While in car, already the body is heat absorbing and traps heat in summer which then leads to the switching on of ACs in the car.

While in such hot summer when the AC is turned on then the ventilation becomes null. Which makes the hot air rise above and the cool air settle down.

But since there's no way for hot air to move, it remains inside the car and make it hotter in the summer and this in turn make people turn on their AC at cooler temperature and for longer time, thus consuming in more energy.

While in house, due to proper ventilation, there's a movement maintained in the atmosphere.

Therefore, it takes more energy to cool a hot car than it does to cool a medium-sized house in Atlanta during summer.

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Answer:

the placement of the ammeter in the circuit

Explanation:

Answer:

1108.464 N of force

Explanation:

diameter of water hose = 70 cm = 0.7 m

radius = 0.7/2 = 0.35 m

volumetric flow rate Q = 420 L/min

1 L = 0.001 m^3

1 min = 60 s

therefore,

Q = 420 L/min = (420 x 0.001)/60 = 0.007 m^3/s

Area A of fire hose = π\(r^{2}\) = 3.142 x \(0.35^{2}\) = 0.38 m^2

From continuity equation, Q = AV

where V1 is the velocity of the water through the pipe, and A1 is the area of the pipe.

Q = A1V1

0.007 = 0.38V1

V1 = 0.007/0.38 = 0.018 m/s.

Nozzle diameter = 0.75 cm = 0.0075 m

radius = 0.00375

Area = π\(r^{2}\) = 3.142 x \(0.00375^{2}\) = 4.42 x \(10^{-5}\) m^2

velocity of water through the nozzle will be

V2 = Q/A2 = 0.007 ÷ (4.42 x \(10^{-5}\)) = 158.37 m/s

From

F = ρQ(v2 - v1)

Where,

F = force exerted

p = density of water = 1000 kg/m^3

F = 1000 x 0.007 x (158.37 - 0.018) = 1108.464 N of force

Answer:

The expression for destructive interference in thin films allows to find the result for the smallest thickness of the films is:

         t = 2.03 10⁻⁸ mm

Explanation:

Given parameters

Incident wavelength lamo = 535 nm

Refractive index of the film n = 1.32

To find

The minimum thickness for destructive interference

The interference phenomenon occurs when the path of two rays scattered by an obstacle have different optical paths. In the case of thin films we must take into account:

The reflected wave has a phase change of 180º when it goes from a medium with a lower refractive index to a medium with a higher index.

Inside the film medium the wavelength is modulated by the refractive index.

In the attachment we see an outline of these events and the expression for destructive interference remains.

               2 n t = m λ₀

Where n is the refractive index, t the thickness of the film, λ₀ the wavelength in the vacuum and m an integer indicating the order of interference.  

             t =  

The first destructive interference occurs for m = 1, let's calculate.

       t =    

       t = 202.65 nm

Let's reduce this amount to millimeters.

        t = 202.65 nm  

        t = 2,027 10⁻⁸ mm

In conclusion, using the expression for destructive interference in thin films we can find the result for the smallest thickness of the films is:

         t = 2.03 10⁻⁸ mm

The acceleration of the car is approximately -3.06 m/s^2.

To find the acceleration of the car, we can use the kinematic equation:

v^2 = u^2 + 2as

Where:

v = final velocity = 0 m/s

u = initial velocity = 14 m/s

a = acceleration (to be determined)

s = displacement = 32 m

Plugging in the values into the equation, we can solve for acceleration:

0^2 = 14^2 + 2a(32)

Simplifying:

0 = 196 + 64a

Rearranging the equation:

64a = -196

Dividing both sides by 64:

a = -196/64

a ≈ -3.06 m/s^2

This means that every second, the car's velocity decreases by 3.06 meters per second. The negative sign indicates that the acceleration is in the opposite direction of the initial velocity, opposing the car's motion and bringing it to a stop.

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Explanation:

I have only 4 of them ,hope they help

Given:

The force is F = 100 N

The acceleration is a = 2 m/s^2

To find the mass of the object.

Explanation:

The mass can be calculated as

Thus, the mass of the object is 50 kg.

Answer:

B 1,3, and 4

Explanation:

The car is moving at approximately 12.5 meters per second.

The kinetic energy (KE) of an object can be calculated using the formula:

KE = 1/2 * m * \(v^2\)

where

KE = kinetic energy,

m =Mass of the object, and

v = velocity.

In this case, we are given the mass (m) of the car as 1600 kg and the kinetic energy (KE) as 125,000 J. To find the velocity .

Substituting the  values , we have:

125,000 J = 1/2 * 1600 kg *\(v^2\)

Now, we can solve for v by rearranging the equation:

\(v^2\) = (2 * 125,000 J) / 1600 kg

\(v^2\) = 156.25 \(m^2/s^2\)

Taking the square root, we find:

v = √156.25\(m^2/s^2\)

v ≈ 12.5 m/s

Therefore, the car is moving at approximately 12.5 meters per second.

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The index of refraction of light has a minimum value of 1 when it passes through two nearby materials with dissimilar optical properties. At the boundary between the two materials.

First, the various indices of refraction (in various media) must be taken into consideration. For instance, the refractive index of light in a vacuum is one (because vacuum = c). The "optical density" of a medium is determined by its refractive index value: Since transparent mediums other than a vacuum diffuse light more slowly than those that are not, n > 1 in all of them. Examples of common values include those of air (1,003), water (1,33), glass (1,46–1,66), or diamond (2.42). There is a minimum and a maximum value for the refractive index, and we may determine the minimum value using the following. The angle of refraction at which the refracted beam vanishes and all light is reflected is known as the limit or minimum angle, abbreviated as lim. Snell's rule allows us to determine the limit angle (the smallest angle we would need to have to know the minimal index of refraction), since the maximum value of the angle of refraction, from which everything is reflected, is max = 90o:

n 1x sin (lim) = n 2 sin (lim) = n 2 / n 1 = 1 with max = 90o

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The complete question is -

When light propagates through two adjacent materials that have different optical properties, some interesting phenomena occur at the interface separating the two materials. For example, consider a ray of light that travels from air into the water of a lake. As the ray strikes the air-water interface (the surface of the lake), it is partly reflected back into the air and partly refracted or transmitted into the water. This explains why on the surface of a lake sometimes you see the reflection of the surrounding landscape and other times the underwater vegetation.

These effects on light propagation occur because light travels at different speeds depending on the medium. The index of refraction of a material, denoted by n , gives an indication of the speed of light in the material. It is defined as the ratio of the speed of light c in vacuum to the speed v in the material, orn=cv. What is the minimum value that the index of refraction can have?

Answer:

Following the recent news that the world’s heaviest person alive has lost an incredible 291 kg (641 lb or 45 st – the equivalent of 40 large bowling balls!), we take a look back at the story of the heaviest humans on Earth. It’s a tale that is by turns turbulent, tragic and even uplifting.

The heaviest human category is not one that’s challenged very often. Few individuals wish to publicize their extreme obesity, although occasionally a new story breaks when someone seeks help for what is a very serious medical condition. Record holders face a constant struggle, not only with their extreme size and fluctuating waistlines, but also the life-threatening health issues that accompany them.

This is the case with the most recent man to be verified as the world’s Heaviest human: Juan Pedro Franco Salas of the central Mexican city of Aguascalientes.Explanation: for humans

Answer:

hi, I am an IGCSE student and i know pretty well about physics, may I help you with any question?

Explanation:

Answer:

The atomic number of the element in this notation is 15.

Explanation:

The X notation for an atom provides information about its atomic number and mass number. The atomic number is the number of protons in the nucleus of an atom, which determines its chemical properties and identity as an element. The mass number is the sum of the number of protons and neutrons in the nucleus.

In the notation "32 on 15 X", the number on the top (32) represents the mass number of the atom, which is the total number of protons and neutrons in the nucleus. The number on the bottom (15) represents the atomic number of the atom, which is the number of protons in the nucleus.

Therefore, the atomic number of the element in this notation is 15.

Answer:  Energy can be transferred between objects or systems through various mechanisms such as conduction, convection, radiation, and mechanical work.

In conduction, heat energy is transferred between objects or systems that are in contact with each other through direct molecular collisions. For example, if you heat a metal rod at one end, the heat energy is transferred through the rod to the other end.

In convection, heat energy is transferred between objects or systems through the movement of fluids, such as air or water. For example, when you boil water on a stove, the heat is transferred from the stove to the water through conduction. As the water heats up, it rises to the top of the pot and cooler water flows in to take its place. This process of rising and falling creates a convection current that transfers the heat energy throughout the water.

In radiation, energy is transferred through electromagnetic waves, such as light or infrared radiation. For example, the heat energy from the sun is transferred to the Earth through radiation.

Mechanical work can also transfer energy between objects or systems. For example, when you lift an object off the ground, you are doing work against the force of gravity. The energy you use to do this work is transferred to the object in the form of potential energy.

An example of energy transfer is the use of solar panels to generate electricity. When sunlight hits the solar panels, the energy is transferred through radiation, which creates an electrical current that can be used to power appliances and devices. In this case, the energy is transferred from the sun to the solar panels to the electrical devices.

Explanation: would apreciate a thanks and a brainliest :D

Answer:

Explanation:

The one above is incorrect, and I know this is late. Even if it doesn't help you I hope it helps people in the future! YES I AM TALKING ABOUT YOU FUTURE PEOPLE!! I know this is the answer because I have taken 5.11 Quiz: Uncrewed Spacecraft in K12. There will only be the questions and correct answers below.

1. Which planetary body was Spirit designed to explore?

Mars.

2. What is the name of the most distant manmade object in space? (Credit: shathaadnan64/lak521)

Voyager 1.

3. Which group was designed to study Saturn? (Credit: Brainly User/snowballandtigoya1xa

Voyager 1, Huygens, and Cassini.

4. Why are scientists interested in exploring Mars?

Possible evidence of life.

5. What do interplanetary space missions study?

Planets in the solar system.

Have an amazing day!!

Since the sum of the odd term coefficients and the even term coefficients must both be zero, the expression a0+a1k+a2k2++ankn is divisible by 3 for all kN.

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Answer:Magnetic fields from two sources add up as vectors at each point, so the strength of the field is not necessarily the sum of the strengths1. Magnetic fields are vectors, which means they have direction as well as size. Therefore, the sum of two magnetic fields is not simply the sum of their magnitudes2.

Explanation:

Answer:

Jumping battle slams - just move the rope up and down

Alternating jump wave - jump and move the rope side to side

Alternating wide circles - move the rope in a circle position

Jumping jacks

Squat to sholder

Explanation:

The guy above me is correct give him Brainliest