Can you please help me with this!?

Answer:

false

Explanation:

The electrical force is much weaker than the force of gravity. False. Thomas Edison argued that our electrical system should use direct current because he felt that alternating current was dangerous.

Answer:

False

Explanation:

electrical force is billions and trillions and trillions times stronger than gravity. Gravity is a weak force compared to electrical force.

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Answer:

In a material, the magnetic behavior depends on the alignment of magnetic moments of the atoms. Magnetic moments are generated by the motion of the electrons in the atoms. When the magnetic moments of atoms in a material are aligned in a specific pattern, it creates a magnetic field which results in the material being magnetic.

In many materials, the magnetic behavior arises due to the alignment of magnetic domains, which are regions of atoms with magnetic moments aligned in the same direction. When many domains with aligned magnetic moments are present in a material, the material becomes magnetic.

The magnetic behavior of a material depends on the number of electrons and the arrangement of those electrons in the atoms. In particular, for an atom to have a magnetic moment, it must have unpaired electrons, meaning electrons that are not paired with another electron with the opposite spin. When these unpaired electrons in the atoms are aligned, they generate a magnetic moment. If all electrons are paired, there will not be a net magnetic moment, so the material will not be magnetic.

So, in summary, the magnetic behavior of a material is determined by the alignment of magnetic moments of atoms. When the magnetic moments of many atoms in a material align in the same direction, it creates a magnetic field, leading to a material being magnetic. This alignment is usually present in magnetic domains consisting of atoms with unpaired electrons.

Explanation:

Both are field dependent. Electric force is dependent on charge, while Magnetic force is dependent on current or rate of charge flow

Answer:

Time=120seconds

Explanation:

S=300m

V=2.5m/s

t=?

V=S/t

t=S/V

t=300/2.5

t=120 second

Answer:

120 seconds

Explanation:

.....

...

.....

Answer:I

Explanation:

i

(C)

Explanation:

The circle has a radius r = 0.5 m, which means that its circumference C is

\(C = 2\pi r = 2\pi(0.5\:\text{m}) = 3.14\:\text{m}\)

One revolution means that the stopper travels a distance equal to the circumference of the circle so the velocity of the stopper is

\(v = \dfrac{C}{t} =\dfrac{3.14\:\text{m}}{0.2\:\text{s}} = 15.7\:\text{m/s} \approx 16\:\text{m/s}\)

Solving Gaussian integration with polar coordinates involves converting the integral into polar coordinates, finding the mean and standard deviation of the function, substituting them into the Gaussian distribution formula, and integrating it over the range of the function in polar coordinates.

Gaussian integration with polar coordinates is the process of finding the integral of a function using polar coordinates and the Gaussian distribution. The polar coordinate system is a two-dimensional coordinate system that uses the radius and angle to locate a point in a plane. The Gaussian distribution is a probability distribution that is often used to describe random variables in statistics.
To solve the Gaussian integration with polar coordinates, we need to convert the integral into polar coordinates. The conversion is done using the following equations:
x = r cos(θ)
y = r sin(θ)
r² = x² + y²
θ = tan⁻¹(y/x)
Once the integral is converted into polar coordinates, we can use the Gaussian distribution to solve it. The Gaussian distribution is given by the following formula:
f(x) = (1/σ√(2π))e^(-(x-μ)²/2σ²)
where μ is the mean of the distribution and σ is the standard deviation. To use this formula, we need to first find the mean and standard deviation of the function we are integrating.
After finding the mean and standard deviation, we can substitute them into the Gaussian distribution formula and integrate it over the range of the function in polar coordinates. The result of the integration will be the value of the integral.
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The correct equation for the x-axis of object A is F-T = mga, where F is the force acting on object A, T is the tension in the rope, m is the mass of object A, g is the acceleration due to gravity, and a is the acceleration of object A.

From NA - WA = 0, we know that the normal force acting on object A is equal to its weight, NA = WA = mg = 75 kg * 9.81 m/\(s^2\) = 735.75 N.

From Ng - WB = 0, we know that the weight of object B is equal to the weight of the hanging mass, WB = mg = 75 kg * 9.81 m/\(s^2\) = 735.75 N.

The tension in the rope is equal to the weight of the hanging mass, T = WB = 735.75 N.

From F - T = mga, we can solve for the acceleration of object A, a = (F - T) / m = (mA * g - T) / mA = (mA * g - 735.75 N) / mA.

Substituting the given values of mA = 50 kg and g = 9.81 m/\(s^2\), we get a = (50 kg * 9.81 m/\(s^2\) - 735.75 N) / 50 kg = 4.549 m/\(s^2\).

Therefore, the correct equation for the x-axis of object A is F-T = mga = 50 kg * 4.549 m\(s^2\) = 227.45 N.

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Vehicles need to be serviced for several reasons such as preventing costly repairs and improving fuel economy.

First, regular maintenance can help to prevent costly repairs down the road. Second, maintenance can help to improve fuel economy and emissions. Third, maintenance can help to keep your vehicle safe and reliable.

The servicing requirements for petrol/diesel and electric vehicles differ in a number of ways. Petrol/diesel vehicles require oil changes more frequently than electric vehicles. This is because petrol/diesel engines use oil to lubricate the moving parts, while electric motors do not. Petrol/diesel vehicles also require tune-ups more frequently than electric vehicles.

This is because petrol/diesel engines have more moving parts that need to be synchronized, while electric motors have fewer moving parts.

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Answer:

4.2 x 10⁵kg

Explanation:

Given parameters:

Speed of orbit  = 7660m/s

Kinetic energy  = 1.24 x 10¹³J

Unknown:

Mass  = ?

Solution:

Kinetic energy is the energy due to the motion of a body. It is mathematically expressed as;

       K.E  = \(\frac{1}{2}\)mv²

m is the mass

v is speed

Now insert the parameters and find the mass;

   1.24 x 10¹³   =  \(\frac{1}{2}\) x m x 7660²  

   1.24 x 10¹³  = 2.93 x 10⁷m

  m  = \(\frac{1.24 x 10^{13} }{2.93 x 10^{7} }\)   = 0.42 x 10⁶kg = 4.2 x 10⁵kg

The frequency of the wave can be obtained as follow:

Frequency (f) = 1 / period (T)

= 1 / 0.0125

= 80 Hertz

The period of the wave can be obtained as follow:

Period (T) = 1 / Frequency (f)

= 1 / 261.6

= 0.00382 s

The frequency of the wave can be obtained as follow:

Frequency (f) = 1 / period (T)

= 1 / 0.10

= 10 Hertz

The frequency of the wave can be obtained as follow:

Frequency (f) = 1 / period (T)

= 1 / 2.7

= 0.37 Hertz

The velocity of the wave can be obtained as follow:

Velocity (v) = wavelength (λ) × frequency (f)

= 450 × 12

= 5400 m/s

The frequency of the wave can be obtained as follow:

Frequency (f)  = Velocity (v) / wavelength (λ)

= 343 / 0.135

= 2540 Hertz

The wavelength of the wave can be obtained as follow:

Wavelength (λ) = Velocity (v) / frequency (f)

= 3.00×10⁸ / 89.1×10⁶

= 3.37 m

The velocity of the wave can be obtained as follow:

Wavelength (λ) = 13.2 m

Frequency (f) = 0.25 Hz

Velocity (v) = ?

Velocity (v) = wavelength (λ) × frequency (f)

= 13.2 × 0.25

= 3.3 m/s

The frequency of the wave can be obtained as follow:

Wavelength of wave (λ) = 16 m

Velocity of wave (v) = 42 m/s

Frequency of wave (f) =?

Frequency (f)  = Velocity (v) / wavelength (λ)

= 42 / 16

= 2.6 Hertz

The wavelength of the wave can be obtained as follow:

Wavelength (λ) = Velocity (v) / frequency (f)

= 343 / 261.6

= 1.31 m

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The Phase shift is a shift in sound wave frequency that happens when the originator of the acoustic pressure is moving in relation to a listener who is stationary.

As an observer and a mobile source of waves come closer together, there appears to be an upward shift in frequency, and when they move apart, there appears to be a downward movement in frequency. This phenomenon is known as the Doppler effect.

Doppler shift is frequently demonstrated by the change in pitch that occurs as a car approaches and moves away from a viewer while sounding its horn. The received frequency increases during proximity, identical at the time of passing by, and lower when matched to the emitted frequency.

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The diameter of the smaller end of the pipe is approximately 0.78 meters.

To determine the diameter of the smaller end of the pipe, we can use the principle of conservation of mass. According to this principle, the mass flow rate of water should remain constant throughout the pipe.

The mass flow rate is given by the equation:
Mass flow rate = density of water * cross-sectional area * velocity

Since the density of the water remains constant, we can write:
Cross-sectional area1 * velocity1 = Cross-sectional area2 * velocity2

Given that the velocity1 is 13 m/s, the diameter1 is 1.2 m, and the velocity2 is 30 m/s, we can solve for the diameter2 using the equation:
(pi * (diameter1/2)^2) * velocity1 = (pi * (diameter2/2)^2) * velocity2

Simplifying the equation:
(1.2/2)^2 * 13 = (diameter2/2)^2 * 30

Calculating the equation:
(0.6)^2 * 13 = (diameter2/2)^2 * 30

0.36 * 13 = (diameter2/2)^2 * 30

4.68 = (diameter2/2)^2 * 30

Dividing both sides by 30:
0.156 = (diameter2/2)^2

Taking the square root of both sides:
0.39 = diameter2/2

Multiplying both sides by 2:
0.78 = diameter2

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Answer:

Explanation:

Formula for calculating normal force is expressed as:

\(F = ma\\since \ a = \frac{v^2}{r} \\F = \frac{mv^2}{r}\)

m is the mass of the body = 50kg

v is the velocity of the Ferris wheel = 8m/s

r is the radius of the Ferris wheel

Substitute into the formula:

\(F = \frac{50 \times 8}{10}\\ F = \frac{400}{10}\\ F = 40N\\\)

Hence the normal force of the seat is 40N

Answer:

The energy of a photon emitted by the green light is 3.758 x 10⁻¹⁹ J

Explanation:

Given;

wavelength of the photon, λ = 529 nm = 529 x 10⁻⁹ m

The energy of a photon emitted by the green light is given by;

\(E = hf\\\\E = h(\frac{c}{\lambda} )\\\\\)

Where;

h is Planck's constant = 6.626 x 10⁻³⁴ J/s

c is speed of light = 3 x 10⁸ m/s

Substitute the given values;

\(E = h(\frac{c}{\lambda} )\\\\E =(6.626*10^{-34})(\frac{3*10^8}{529*10^{-9}} )\\\\E = 3.758 *10^{-19} \ J\)

Therefore, the energy of a photon emitted by the green light is 3.758 x 10⁻¹⁹ J

Answer:

The acceleration of the particle as it travels one semicircle is

\(a= \frac{\pi R}{t^2}\)

Explanation:'

Kindly see attached a sketch of a semi-circle

Step one:

given data

velocity =v

let the time taken be t

The path PQM is the distance covered

so distance \(d= \pi R\)

we know that time= distance/velocity

t= πR/v

step two:

velocity =distance/time

\(velocity=\frac{\pi R}{t}\)

also, we know that acceleration is velocity/time

\(a= \frac{\pi R}{\frac{t}{t} }\)

\(a= \frac{\pi R}{t}*\frac{1}{t}\)

\(a= \frac{\pi R}{t^2}\)

Answer:

No because you don't have to be black or white you don't have to be a pacific race to just get it like lets say for example a asian person come in and they want to get a abortion but the doctor say no then that person can end up killing her self or when the baby is born she could end you know doing something bad. But no you do not have to be a pacific person to just get it

Explanation:

The air pressure that will produce a force of the given magnitude is 135 times the pressure transmitted by the liquid. The value of P2, the pressure transmitted by the liquid, is not given in the problem, so we cannot determine the exact value of P1.

The planet's gravitational pull on the gases above its surface produces atmospheric pressure, which depends on the planet's mass, the radius of its surface, the quantity, makeup, and vertical distribution of the gases in the atmosphere.

The following equations describe the force that compressed air exerts on a tiny piston:

F1 = P1 * A1

The larger piston, which has a larger area A2, receives the power via the liquid. The larger piston's power is determined by:

F2 = P2 * A2

Pascal's rule states that the larger piston receives the same amount of pressure P1 as the smaller piston, so we have:

P1 = P2

Since the forces F1 and F2 are equal, we have:

F1 = F2

Therefore:

P1 * A1 = P2 * A2

P1 * (pi * (5.00 cm)²) = P2 * (pi * (15.0 cm)²)

Simplifying and solving for P1, we get:

P1 = (P2 * A2 * (5.00 cm)²)/ (A1 * (15.0 cm)²)

Substituting A1 = pi * (5.00 cm)² and A2 = pi * (15.0 cm)², we get:

P1 = (P2 * 15.0²) / 5.00²

P1 = 135 * P2.

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The force that acts on a projectile in the horizontal direction is Gravitational force.

A projectile is an object upon which the only force is gravity. Gravity acts to influence the vertical motion of the projectile, thus causing a vertical acceleration. The horizontal motion of the projectile is the result of the tendency of any object in motion to remain in motion at constant velocity.

Due to the absence of horizontal forces, a projectile remains in motion with a constant horizontal velocity. Horizontal forces are not required to keep a projectile moving horizontally. Hence, The only force acting upon a projectile is gravity.

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Answer:

Explanation:

The image is real light rays actually focus at the image location). As the object moves towards the mirror the image location moves further away from the mirror and the image size grows (but the image is still inverted).

Answer:

B.

Divide the height of the valley walls by the rate of erosion.

Explanation:

There is a relationship between the rate of erosion and the hieght at which it is eroded according to Newton's law of motion. In the case of the scenario above, the best way to determine the time the river started carving the valley would be the division of the height of the valley walls by the rate of erosion.

Answer:

20 Yards

Explanation:

|---20----|

|            |

| 50       |50

|---D--->|

Start      End

Total displacement(D)  20 yards (East).

Answer:

...

Explanation:

Answer: C.

Explanation: Earth and Mars have the closest length of day. Earth has 23 hours and 56 minutes and Mars has 1 day and 37 minutes. If this is incorrect then it must be B. Both were close.

Answer:

339.29 N

Explanation:

From the question,

Torque = Force×Radius

τ = F×r................. Equation 1

Where

τ = torque, F = Force, r = radius of length of the Wrench.

make F the subject of the equation

F = τ/r.................. Equation 2

Given: τ = 95 Nm, r = 28 cm = 0.28 m

Substitute these values into equation 2

F = 95/0.28

F = 339.29 N

Hence the force perpendicular to the wrench is 339.29 N

Answer:

Answer:

(a) 98 N

(b) 158 N

(c) 38 N

Explanation:

When the acceleration is 0 m/s², the net force on the mass is 0 N. Therefore, the tension force is equal to the weight force due to Newton's Second Law:

Since the tension in the cable and the weight of the mass are equal to each other, we can solve for the weight force of the mass by using:

Since T = w, we can say that T = 98 N.  

Let's set the upwards direction to be positive and the downwards direction to be negative. We can use Newton's Second Law to solve for the tension in the cable if the acceleration is 6 m/s² upward:

Plug the known values into the equation and solve for T.

The tension in the cable if the acceleration is +6 m/s² is 158 N.

The process is the same, but this time acceleration is -6 m/s².

Plug known values into the equation and solve for T.

The tension in the cable if the acceleration is -6 m/s² is 38 N.

Answer:

Weight measures the force of gravity pulling on an object

Explanation:

Bot sure if tht answered ur question

The primary means by which heat is transferred through fluids is convection currents (option D).

Convection is the transmission of heat in a fluid by the circulation of currents.

Heat can be transferred by different methods depending on the medium. Fluids like gases and liquids transfer heat through the process of convection.

Therefore, the primary means by which heat is transferred through fluids is convection currents.

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