A man runs at 7.5 m s-1 due east across the deck of a ship which moves at 10.0 m s-1 due north. Determine the resultant velocity of the man( his velocity relative to the water)

Answer:

distance = 6.26342 miles

Explanation:

Answer:

it's 100m/s2

Explanation:

a=f/m

or,a=5/50/1000. (mass si unit is kg and 1kg=1000g

or,a=5/0.005

or,a=100m/s2

Answer:

D. Electromagnetic waves can travel through empty space

Explanation:

After a few Google searches, this answer seems the most correct

Electromagnetic waves differ from mechanical waves by the fact that electromagnetic waves  can travel through empty space.

The electromagnetic radiation consists of waves made up of electromagnetic field which are capable of propogating through space and carry the radiant electromagnetic energy.

The radiation are composed of electromagnetic waves which are synchronized oscillations of electric and magnetic fields . They are created due to change which is periodic in electric as well as magnetic fields.

In vacuum ,all the electromagnetic waves travel at the same speed that is with the speed of air.The position of an electromagnetic wave in an electromagnetic spectrum is characterized by it's frequency or wavelength.They are emitted by electrically charged particles which undergo acceleration and subsequently interact with other charged particles.

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A surge-type receiver is a circuit that defends electronic equipment from a large voltage surge or spike by delaying it, weakening it, and allowing it to pass.

A surge-type receiver suppresses voltage surges in the power supply lines. It can be a single-unit surge suppressor that is installed at the inlet to the electrical circuit that needs protection. In addition, surge-type receivers are used in switchboards, power supplies, and other applications.

Surge-type receivers are usually required in electrical systems to protect against unexpected surges in voltage that might cause damage to electronic equipment. This surge in voltage might be caused by lightning strikes or the switching of heavy loads on nearby circuits. It is crucial to include surge suppressors at the input of electrical equipment because it safeguards it from voltage surges that might damage sensitive electronic circuits. The receiver can be utilized to suppress voltage surges in power supply lines and can be a single-unit surge suppressor installed at the inlet to the electrical circuit requiring protection. In addition, surge-type receivers are used in switchboards, power supplies, and other applications, where they suppress power surges caused by switching high loads or lightning strikes.

A surge-type receiver is a critical component in any electrical system. It's responsible for suppressing voltage surges and protecting sensitive electronic equipment from harm. It can be a single-unit surge suppressor installed at the input of the electrical circuit requiring protection or used in switchboards, power supplies, and other applications. Surge suppressors are crucial in defending against unexpected voltage surges that could cause damage to electronic equipment.

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Answer:

v = -\frac{n \ m}{M} \ v'

for the man to return to the ship he must throw the balls in the opposite direction of the ship

Explanation:

For this exercise we can use the conservation of momentum. Let's form a system made up of man and baseballs.

Initial instant. Before throwing the balls

     p₀ = 0

Final moment. After throwing the balls

     \(p_{f}\) = M v + n m v '

where M is the mass of the man, m is the mass of each ball and n is the number of balls , v isthe speed man and v' is the speed ball

Since the forces are internal, the momentum of the system is conserved

     p₀ = p_{f}

      0 = M v + n m v ’

      \(v =- \frac{n \ m}{M} \ v'\)

If we analyze this expression, for the man to return to the ship he must throw the balls in the opposite direction of the ship

The types of energy that move through the system are as follows: potential energy, kinetic energy, mechanical energy, and electrical energy.The water stored in the dams contains potential energy.

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Energy stored in the electric field between the tubes is 5.85 x 10-11 J.

Electric field

The electric field is defined as the electric force per unit charge. The direction of the field is taken to be the direction of the force it would exert on a positive test charge. The electric field is radially outward from a positive charge and radially in toward a negative point charge.

The electric field is the amount of electric force per charge and the electric force on a charge at some point in space is the amount of charge times the electric field at that point in space. So recapping, electric charges create electric fields.

In inner tubes.

A1 = \pi ro2 = (3.14) [(0.03 m) / 2] 2

A1 = (3.14) (0.000225 m2) (0.000225 m2)

A1 = 0.0007065 m2

In outer tubes.

A2 = \pi ri2 = (3.14) (3.14) [(0.04 m) / 2] 2

A2 = (3.14) (0.0004 m2) (0.0004 m2)

A2 = 0.001256 m2

The conducting tubes' total area is provided by -

A = (0.0007065 m2) + (0.001256 m2) (0.001256 m2)

A = 0.0019625 m2

A formula that yields

(8.85 x 10-12 C2/Nm2) (0.0019625 m2)/d = C = varepsilon0 A (0.3 m)

C = 5.78 x 10-14 F

The energy stored in the electric field between the tubes when these are coupled to a 45-volt battery is provided as:

U = (1/2) C V2 = (0.5) (5.78 x 10-14 F) (45 V)

U = 5852.2 x 10-14 J

U = 5.85 x 10-11 J

Energy stored in the electric field between the tubes is 5.85 x 10-11 J.

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Answer:KE

Explanation:

The spacetime Using Lorentz transformation equation coordinates in the moving frame are (1303.93 m, 3.01 s).

Given information:

An event has spacetime coordinates (x,t)=1,300 m,3.0 s in reference frame S.What are the spacetime that moves in the negative x - direction at 0.03c?We know that the coordinates of the same event as observed from two different inertial frames are related by the Lorentz transformation equations.

Using Lorentz transformation equation:(x', t') = (γ(x − vt), γ(t − vx/c²))where γ = 1/√(1−v²/c²) represents the Lorentz factor, x is the position in the stationary frame, t is time in the stationary frame, x' is the position in the moving frame, t' is time in the moving frame, v is the relative velocity between the two frames and c is the speed of light in vacuum.We are given,x = 1,300 mt = 3.0 s, v = −0.03c (since the motion is in the negative x direction)∴ γ = 1/√(1−v²/c²) = 1/√(1−0.03²) = 1/0.997

The spacetime coordinates in the moving frame, (x', t') = (γ(x − vt), γ(t − vx/c²))= [1/0.997 (1300 - (-0.03c)(3.0))] m, [1/0.997 (3.0 - (-0.03c)(1300)/c²)] s= (1303.93 m, 3.01 s) [correct to 2 decimal places]

Therefore, the spacetime coordinates in the moving frame are (1303.93 m, 3.01 s).

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Answer:

your answer will be the letter B

The material with the lowest refractive index is air. The correct option is D. Air.

Light waves are a type of electromagnetic wave that travel through space at the speed of light.

In this case, the light wave is traveling through glass and then strikes the boundary with a second medium at a 45° angle, refracting away from the boundary. For the light wave to refract away from the boundary, the second medium must have a lower refractive index than glass.

Out of the options given, the material with the lowest refractive index is air. Therefore, the correct answer is D. Air.

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Answer: Gamma rays (violet) have the shortest wavelengths and the highest frequencies.

Explanation: The wavelength of the gamma rays is less than 0.01 nanometers. The frequency of a wave is inversely proportional to its wavelength. That means that waves with a high frequency have a short wavelength, while waves with a low frequency have a longer wavelength.

The electromagnetic waves have the shortest wavelength and the highest frequency is Gamma rays (violet).

Gamma radiation, from gamma rays (γ), is a type of electromagnetic radiation usually produced by radioactive elements. Gamma rays, due to their high energy, are able to penetrate matter more deeply than alpha or beta radiation.

Gamma ray is a type of high frequency electromagnetic radiation usually produced by radioactive elements.

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Answer:

C is correct

Explanation:

The statement that best describes how the phase of the Moon changes from a full moon to a new moon is as follows:

Thus, the correct option for this question is C.

The different phases of the moon may significantly include the new Moon, waxing crescent, first quarter, waxing gibbous, full Moon, waning gibbous, third quarter, and waning crescent. This cycle of phase change of the moon repeats once a month.

The Earth completes its one rotation around the sun in 365.25 days. While the moon completes its one rotation around the Earth in 29.5 days.  The rotation of the moon around the earth leads to phase change of it. This is because when the moon rotates around the sun, it directly or indirectly causes its exposure to the sun where its phase changes.

In the diagram above, when there is a full moon, the earth is present between the sun and the moon. But when a new moon arises, the moon is present between the earth and the sun.

Therefore, the correct option for this question is C.

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Answer:

550 m/s

Explanation:

Speed of wave = wl * f      wl = 1,25 m    f = 440 Hz  (given)

                          1.25 m * 440 = 550 m/s

Answer:

as the mass of an object is increased, the acceleration of the object is decreased & vice-versa.

Explanation:

hope this helps!

When an electron moves east in a uniform electric field of 1.50 N/C directed to the west, and it travels from point A to point B, a distance of 0.365 m east of point A, its speed remains constant.

Therefore, the speed of the electron at point B is the same as its initial speed at point A, which is 4.55×10^5 m/s.

In a uniform electric field, the force experienced by a charged particle is given by the equation:

F = qE

where F is the force, q is the charge of the particle, and E is the electric field strength. In this case, the electron experiences a force opposite to the direction of its motion, as the electric field is directed to the west. Since the force and velocity vectors are in opposite directions, the speed of the electron remains constant.

As the speed of the electron remains constant, its speed at point B will be the same as its initial speed at point A. Therefore, the speed of the electron at point B is 4.55×10^5 m/s. The distance traveled does not affect the speed of the electron in this scenario.

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The acceleration of the flea during takeoff is approximately 1.0 × 10^9 m^2/s^2.

To determine the acceleration of the flea during takeoff, we can use the kinematic equation:

\(v^{2}\) = \(u^{2}\) + 2as

where:

v = final velocity (takeoff speed) = 1.0 m/s

u = initial velocity (starting from rest) = 0 m/s

a = acceleration

s = distance traveled = 0.50 nm

Converting 0.50 nm to meters:

1 nm = 1 × \(10^{-9}\) m

0.50 nm = 0.50 × \(10^{-9}\) m = 5.0 × \(10^{-10}\) m

Now, we can rearrange the equation and solve for acceleration:

a = \(\(\frac{{v^2 - u^2}}{{2s}}\)\)

a = \(\left(\frac{{1.0 \, \mathrm{m/s}}}{{2 \times 5.0 \times 10^{-10} \, \mathrm{m}}}\right)^2\)

a = \(\(1.0 \times 10^9 \, \text{m}^2/\text{s}^2\)\)

Therefore, the acceleration of the flea during takeoff is approximately \(\(1.0 \times 10^9 \, \text{m}^2/\text{s}^2\)\).

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Answer: >41.5N

Explanation:

Mass of bowling ball = 7.5kg

Breaking point of rope = T > 115N

Where T = Tension on the rope

Since the bowling ball is hung by a rope :

Tension (T) = mg = 7.5 kg × 9.8m/s^2 = 73.5kgm/s^2

T = mg + ma

F = ma

T = mg + F

>115 = 73.5 + F

F = 115 - 73.5

F = 41.5N

Force >41.5N

The device that converts chemical energy into electrical energy is a battery.

On the other hand, the resistor is a passive element that is mainly used to limit the current in a circuit.

A resistor doesn't convert chemical energy into electrical energy.

Therefore, we can conclude that the given statement is false

The reading on the scale is 882.6 N when the elevator accelerates upwards with an acceleration of 4.90 m/s².

Given that the mass of a person is 60.0 kg and the elevator accelerates upwards with an acceleration of 4.90 m/s², we have to determine the reading on the scale.

Let F be the force exerted by the scale on the person. Then, by Newton's second law of motion, the net force acting on the person is Fnet= m * a

where m = 60.0 kg is the mass of the person and a = 4.90 m/s² is the acceleration of the elevator. Hence, the net force acting on the person is given by;

Fnet = 60.0 kg * 4.90 m/s²

Fnet = 294.0 N

Therefore, the scale reading is equal to the force exerted by the scale on the person. Since the elevator is accelerating upwards, the force exerted by the scale on the person is greater than the weight of the person, which is the force of gravity acting on the person.

The force of gravity acting on the person is given by;

Fg = m * g, where g = 9.81 m/s² is the acceleration due to gravity. Hence, the force of gravity acting on the person is given by;

Fg = 60.0 kg * 9.81 m/s²Fg = 588.6 N

Therefore, the scale reading is given by the sum of the force of gravity acting on the person and the net force acting on the person;

F = Fg + Fnet

F = 588.6 N + 294.0 N

F = 882.6 N

Thus, the reading on the scale is 882.6 N when the elevator accelerates upwards with an acceleration of 4.90 m/s².

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Answer:

The single touch method of making a magnet is a simple way to magnetize a ferromagnetic material, such as a piece of iron. The process involves taking a magnet and bringing it into contact with the material to be magnetized, while moving it along the length of the material in a single direction. This process aligns the magnetic domains within the material, causing it to become magnetized. The strength of the resulting magnet depends on the strength of the magnet used and the length of time it is in contact with the material.

The process of making an electromagnet involves using an electric current to create a magnetic field. To make an electromagnet, a wire is wound into a coil around a magnetic core, such as an iron rod. When an electric current flows through the wire, it creates a magnetic field around the coil, which in turn magnetizes the magnetic core. The strength of the resulting magnet depends on the strength of the current flowing through the wire, the number of coils in the wire, and the type of magnetic core used. Electromagnets are commonly used in a variety of applications, including electric motors, speakers, and MRI machines.

Explanation:

Answer:

See below

Explanation:

vf = vo + at            vf = final velocity      vo = original velocity

88  =  0  +  a (19.7)

a = 88/19.7 = 4.47 m/s^2

Answer: The panel of solar cells transforms solar or sunlight energy into electrical energy.

Explanation:

The panels take the visible light waves emitted from the sun and convert them into electricity.

Answer:

sunlight or solar it absorb sun energy

Answer:

Coal was one of man's earliest sources of heat and light. The Chinese were known to have used it more than 3,000 years ago. The first recorded discovery of coal in this country was by French explorers on the Illinois River in 1679, and the earliest recorded commercial mining occurred near Richmond, Virginia, in 1748

Explanation:

A sequence diagram is a type of UML (Unified Modeling Language) diagram that shows the interactions between objects or components of a system as they occur in a chronological sequence.

It is a graphical representation of the interactions that take place between objects or components of a system, depicting the order of messages that are exchanged between them.

Sequence diagrams are used to visualize the flow of a system's functionality, as well as the communication and collaboration between the various components of the system. They are especially useful in understanding complex systems and identifying areas that may require improvement or optimization. Sequence diagrams are also often used to document and communicate the design of a system to stakeholders or development teams.

In summary, a sequence diagram shows the timing of interactions between objects or components of a system as they occur. It is a valuable tool in understanding and communicating the behavior and functionality of complex systems.

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Using kitchen and bath exhaust fans may increase heating and cooling requirements, as they remove conditioned air and draw in unconditioned air from outside.

Kitchen and bath exhaust fans work by extracting air and moisture from the rooms they are installed in, which helps to reduce humidity and odors. However, they can also remove conditioned air (heated or cooled) from your home, forcing your heating and cooling system to work harder to maintain the desired temperature. This can lead to increased energy consumption and costs.

To mitigate this issue, make sure the exhaust fans are properly sized and vented, and use them only when necessary. Additionally, consider using energy-efficient models or installing a heat recovery ventilator (HRV) or energy recovery ventilator (ERV) to help minimize energy loss while maintaining a comfortable indoor environment.

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Answer:

A modulation is a voltage, frequency, pulse, or phase change in an analog transmission.

Explanation:

A modulation is a voltage, frequency, pulse, or phase change in an analog transmission. It is a process by which a signal, such as an audio or video signal, is modified in order to be transmitted over a longer distance.

Some key points about modulation include:

- Modulation allows analog signals to be transmitted over long distances without degradation.

- There are several types of modulation, including amplitude modulation (AM), frequency modulation (FM), and phase modulation (PM).

- In AM, the amplitude of the signal is varied in order to carry information.

- In FM, the frequency of the signal is varied in order to carry information.

- In PM, the phase of the signal is varied in order to carry information.

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A modulation is a voltage, frequency, pulse, or phase change in an analog transmission.

Modulation is the process of changing a signal's characteristics to encode information for transmission. In analog transmissions, the signal is continuous and varies in amplitude, frequency, or phase.

Modulation techniques include, amplitude modulation (AM), frequency modulation (FM), and phase modulation (PM), among others. These techniques are used in radio, television, and telephone systems, among others.

The modulation process converts the analog signal into a format that can be transmitted over a channel, such as a wire or radio frequency, and then demodulated at the receiving end to recover the original signal.

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