A micrometeor has a mass of 0.005 grams. When it enters Earth's atmosphere, it travels at 21,000 meters per second. What is its kinetic energy when it enters Earth's atmosphere? KE=1/mv² (1 point) O 0.0525 J O 1,102.5 J O 1,102,500 J O 2,205 J E​

Help me please

The resultant force subtracts the magnitude of the smaller force from the magnitude of the larger force. The direction of the resultant force is in the same direction as the larger force.

In physics, the resultant force is the net force acting on an object, which takes into account all the individual forces acting on the object. When multiple forces act on an object, they can either reinforce or oppose each other. The resultant force is the sum of all these individual forces, taking into account both their magnitudes and directions.

Mathematically, the resultant force can be found by using vector addition. Each force acting on an object can be represented as a vector with its magnitude and direction, and the resultant force is the vector sum of all these forces. If the resultant force is non-zero, it will cause the object to accelerate in the direction of the force.

The concept of the resultant force is important in many areas of physics, including mechanics, electromagnetism, and fluid dynamics. Understanding the resultant force is crucial in predicting and explaining the motion of objects, and it is a fundamental concept in the study of physics.

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Answer:

0.89 m/s^2

Explanation:

Here we are given that,

As we know that in case of uniform circular motion , centripetal acceleration is given by,

[tex]\implies a_c =\dfrac{v^2}{r} \\[/tex]

And here ,

[tex]\implies v = 76km/h =\dfrac{5}{18}\times 76\ m/s \\[/tex]

[tex]\implies v = 21.1 \ m/s \\[/tex]

Also ,

[tex]\implies r =\dfrac{d}{2} \\[/tex]

[tex]\implies r = 0.5km =\boxed{500m} \\[/tex]

Now substitute the respective values,

[tex]\implies a_c = \dfrac{21.1\times 21.1 }{500} m/s^2 \\[/tex]

[tex]\implies\underline{\underline{ a_c = 0.89\ m/s^2}} \\[/tex]

and we are done!

The electrons must be accelerated to a speed of approximately 2.07 million meters per second to obtain a resolution of 0.19 nm.

The de Broglie wavelength of a particle is given by:

λ = h / (mv)

Where h is the Planck constant, m is the mass of the particle, and v is its velocity. To obtain a resolution of 0.19 nm, the de Broglie wavelength must be equal to or less than 0.19 nm.

Rearranging the equation above and solving for v, we get:

v = h / (mλ)

Given the mass of an electron (m = 9.10938356 x 10^-31 kg), and the Planck constant (h = 6.62607015 x 10^-34 Js), we can calculate the required velocity for a de Broglie wavelength of 0.19 nm (λ = 0.19 x 10^-9 m):

v = (6.62607015 x 10^-34) / (9.10938356 x 10^-31 x 0.19 x 10^-9)

v ≈ 2.07 x 10^6 m/s

So, the electrons must be accelerated to a speed of approximately 2.07 million meters per second to obtain a resolution of 0.19 nm.

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Answer:

here

Explanation:

in torque the length dimension is measured perpendicularly to the direction of the force, and acts as a multiplier of the linear force. Torque is equivalent to force in rotary systems.

The airplane needs to be pointing in a direction 5.71 degrees east of north to compensate for the crosswind and arrive at its destination.

Since the airplane is moving due north and the wind is blowing from west to east, the angle between the airplane's heading and the wind is 90 degrees. We can use vector addition to determine the airplane's resultant velocity, which will point in the direction the airplane needs to be pointing.  The magnitude of the resultant velocity can be found using the Pythagorean theorem:

Resultant velocity = [tex]sqrt(airspeed^2 + wind speed^2) = sqrt(200^2 + 20^2) = 201.25 mph[/tex]

The angle between the airplane's heading and the resultant velocity can be found using trigonometry:

[tex]tan(theta) = wind speed / airspeed = 20 / 200 = 0.1[/tex]

[tex]theta = tan^-1(0.1) = 5.71 degrees[/tex]

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Answer:

see below

Explanation:

in SI unit J/s is watt . So here,

36100 J/s

= 36.1 * 10³ J/s

= 36.1 * 10³ Watts

= 36.1 kilowatts

so 36.1 kW of power is being used.

hope this helps.

The rock went 34.22 metres, as indicated by the question that was given. Thus, this is the required treatment.

The source of an object's motion is altering, thus even if it moves in a circle at constant speed, it is still moving forward.

It is given that,

Mass of the rock, m = 39 g = 0.039 kg

Gravitational acceleration, a = 1.62 m/s2.

We need to find the distance traveled by the rock when it falls from rest in 6.5 seconds if the only force acting on it was the gravitational force due to the Moon. With the help of a second equation of motion, i.e.

x = u t + [tex]\frac{1}{2}[/tex] at²

x = 0 +  [tex]\frac{1}{2}[/tex] x 1.62ms²x (6.5s)²

x = 34.22 meters

or Distance, x = 34.22 meters

x =34.22 meters

Consequently, the rock travelled 73.10 metres. Hence, this is the required solution.

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It would have the least kinetic energy at point A

Kinetic energy is the energy an object possesses as a result of its motion. It is the energy associated with the movement of an object and is proportional to the mass of the object and the square of its velocity. The formula for kinetic energy is given by:

KE = 0.5 * m * v^2

where m is the mass of the object and v is its velocity. Kinetic energy is a scalar quantity and is measured in joules (J) or other units of energy.

Since the motion commenced at the point A, that is the point of the least kinetic energy.

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Standing waves are the foundation of the physics of wind instruments. Standing waves are created when the player blows into the mouthpiece, causing the air column inside the instrument to vibrate.

A standing wave of air is produced inside a wind instrument, which produces a tone. In most wind instruments, the air inside the tube-shaped body of the instrument picks up a vibration that the musician generates at the mouthpiece, amplifies it, and gives it a pleasing timbre.

Theory. When a wave appears to be standing, the overall pattern does not appear to be moving. The fundamental prerequisite for a standing wave to appear on a string is that.

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The wavelength of the radiation is 2.63 x 10^-6 m

The wavelength of the most intense electromagnetic radiation emitted from the surface of a star can be calculated using Wien's Law, which states that the wavelength of maximum emission is inversely proportional to the temperature of the star. The formula for Wien's Law is given by:

λ = b / T

where

λ_max is the wavelength of maximum emission,

T is the temperature in kelvins, and

b is Wien's constant, which is equal to 2.898 x 10^-3 m K.

Substituting the values for the surface temperature of Sirius and Wien's constant, we get:

λ = 2.898 x 10^-3 m K / 11,000 K

λ = 2.63 x 10^-6 m

So, the wavelength is 2.63 x 10^-6 m

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The child's torque on the heel at the nine o'clock position is equal to (30)(9.8)(10)sin90=2940 Nm.

The torque resulting from the upward force applied to the ball of the foot must be equal to the torque resulting from the force on the Achilles tendon. The force on the Achilles tendon times its lever arm equals the torque caused by the tendon.

Weight of child = 30kg

Radius = 10 meter

Mass of carriage = 80kg

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The vehicle travels 126.7 meters while increasing its speed by 3.00 m/s2 from 10 m/s to 30 m/s.

Speed is a scalar variable that quantifies how quickly an object's position changes in a particular direction. It is a way to gauge how far you've come in a certain amount of time.

The following equation can be used to determine how far the car drove while accelerating:

d = v0 * t + 0.5 * a * t^2

where d is the distance traveled, v0 is the starting speed (10 m/s in this example), a is the acceleration (3.00 m/s2), and t is the amount of time that has passed.

In order to calculate the passing of time, we can apply the equation:

v = v0 + a * t

Considering that v = 30 m/s and v0 = 10 m/s, calculate t as follows:

30 = 10 + a * t

t = (30 - 10) / a = 20 / 3 = 6.67 s

Adding the values for v0, a, and t to the first equation yields the following results:

d = 10 * 6.67 + 0.5 * 3.00 * 6.67^2

   = 66.7 + 60 = 126.7 m

As a result, the vehicle travels 126.7 meters while increasing its speed by 3.00 m/s2 from 10 m/s to 30 m/s.

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The resistance of the wire will increase by a factor of 4 if the radius is reduced by a factor of 2.

The resistance of a wire depends on several factors, including its material, length, and cross-sectional area. According to Ohm's law, the resistance of a wire is given by the formula:

R = ρ * L / A

where R is the resistance, ρ is the resistivity of the material, L is the length of the wire, and A is its cross-sectional area.

If the radius of the wire is reduced by a factor of 2, then the cross-sectional area will be reduced by a factor of 4 (A = [tex]pi*r^2[/tex]). This means that the resistance of the wire will be 4 times larger:

R' = ρ * L / (A/4) = 4 * ρ * L / A = 4 * R

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The power factor is now 0.6, which is an improvement over previous value (which would be lower than 0.6 due to the higher reactive power demand).

Capacitor of 8 kVAR is placed parallel with an electromagnet that draws 3 kW of active power and 4 kVAR of reactive power, resulting circuit becomes a combination of a capacitive and an inductive load.

Net reactive power = [tex]8 kVAR - 4 kVAR = 4 kVAR[/tex]

So, the resulting circuit will have a net reactive power of [tex]4 kVAR[/tex].

The power factor (cos) of the circuit can be calculated as ratio of active power to  apparent power:

cos = Active power / Apparent power

The apparent power can be calculated as:

Apparent power = [tex]sqrt(Active power^2 + Reactive power^2)[/tex]

Apparent power = [tex]sqrt(3^2 + 4^2) kVA = 5 kVA[/tex]

So, the power factor of the circuit can be calculated as:

[tex]cos = 3 kW / 5 kVA = 0.6[/tex]

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The velocity of the object is 9 m/s.

We have to note that when we are talking about the momentum what we mean is the product of the mass and the velocity of the body and the momentum of the body before Collison is equal to the momentum of the body after collision.

This is the law of the conservation of linear momentum as we already know it.

We then know that;

(9 * 3) + (3 * 0) = (9 * 0) + (3 * v)

V is the velocity of the skater after the Collison.

v = 27/3

v = 9 m/s

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Form the most generic linear combination of the nonhomogeneous term's family of functions, insert this expression into the provided nonhomogeneous differential equation, and solve for the linear combination's coefficients.

By locating a point that satisfies one of these parallel lines or curves, we can find the precise equation of the form y = f(x), which is the differential equation's specific solution. The general solution of a differential solution would be of the form y = f(x), which could be any of the parallel lines or curves.

The method of indeterminate coefficients in mathematics is a method for solving certain nonhomogeneous ordinary differential equations and recurrence relations.

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The maximum height travelled by the ball is 189.23 m.

The maximum height travelled by the ball is calculated by applying the following kinematic equation as shown below.

h = vt + ¹/₂gt²

where;

h = ( 64.1 m/s x 4.5 s )  -  ¹/₂ ( 9.8 m/s² ) ( 4.5 s )²

h = 189.23 m

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Answer:

V = V0 +  a t     velocity after time t

If V0 = 0   then V = a t

V = 3 m/s^2 * 2 s = 6 m/s

If you observe the Moon rising in the east as the Sun is setting in the west, you will observe the phase of moon to be a full moon.

The Moon's phase depends on where it is in reference to the Sun and Earth. Every day, much like the Sun, the Moon rises in the east and sets in the west. The Moon rises and sets at various times during the month. The Moon is visible both during the day and at night.

When the Moon is in its full phase, we can only view the side that is lighted because it is on the other side of the Earth from the Sun. On that day, the Sun rises as it begins to set, and vice versa.

Just like the Sun and the night time stars, the Moon's apparent rising in the east and setting in the west each day is not from the Moon's orbit around the Earth, it's from the Earth spinning. Even if the lunar orbit is slower and more difficult to view, you may still see it.

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Despite the fact that we can use the equation to determine where it falls, we choose the equation and the equation (for soccer) instead. Because they provide information when and where and are considered more basic than equations.

A formula is a statement that two amounts or values ​​are equal, like this: B. 6 x 4 = 12 x 2. 2. Key nouns. When two or more components need to be considered together to understand or describe the overall situation, it is called an equation.

A mathematical statement, known as an equation, consists of two expressions joined by an equal sign. For example, the formula is 3x - 5 = 16. Solving this equation reveals that the value of the variable x is 7. 

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A man moves a sled across a horizontal snow surface at a steady speed. 68.6 N is the force of friction between the sled and the snow if he pulls the rope with an 80 N force at a 53 N angle above the horizontal.

The force of friction can be determined using the following equation:

= F friction

= F norm - F applied × cos(θ)

here,

"F norm" is the normal force exerted by the snow on the sled,

"F applied" is the force applied by the man,

"θ" is the angle between the applied force and the horizontal.

Since, the sled moves at constant velocity, the net force on the sled must be zero.

Hence,

The force of friction must balance the applied force:

= F friction

= F applied × cos(θ)

Adding values:-

= F friction

= 80 N × cos(53°)

= 68.6 N

Therefore, the force of friction between the sled and the snow is 68.6 N.

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The required average acceleration of the particle during this 4.200 s interval is calculated to be 10.23 m/s² and in the opposite direction to the particle's initial velocity.

The speed of the particle is given as 16 m/s.

v₁ = 16 m/s

And t₁ = 0

The speed of the particle in the opposite direction is 27 m/s.

v₂ = - 27 m/s

The average acceleration at t₂ = 4.2 s is to be found out.

The expression to find average acceleration is,

a avg = [v(t₂) - v(t₁)]/(t₂ - t₁) = (-27 - 16)/(4.2 - 0) = 43/4.2 = -10.23 m/s²

Thus, the required average acceleration of the particle during this 4.200 s interval is 10.23 m/s² and in the opposite direction to the particle's initial velocity.

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Answer

heyyy ok its b

Explanation:

The ultrasonic transducer in a medical ultrasound imaging device is a device that converts electrical energy into mechanical (ultrasonic) energy and vice versa, oscillating back and forth 1 million times per second with a mass of 0.10 g.

The ultrasonic transducer is an essential component in medical ultrasound imaging devices as it produces high-frequency sound waves that are used to generate images of the inside of the body. The device works by sending sound waves into the body and then measuring the echoes that are reflected back from the internal organs and tissues.

This information is then used to create an image of the inside of the body on a screen. The transducer operates in simple harmonic motion (SHM) and has a frequency of 1.0 MHz, meaning it oscillates back and forth 1 million times per second. The thin disk-like structure of the transducer is designed to produce highly focused sound waves that can penetrate deep into the body while minimizing any damage to the surrounding tissues.

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The net electric field vector at the field point o the origin is  kQ/L² (1.732i + j )

The electric field vector is a vector quantity that describes the strength and direction of the electric field at a given point in space.

The electric field vector at a point due to a point charge q is given by Coulomb's law:

E = kq/r²

where;

Based on the position of the charges, the electric field vector at the origin due to each point charge has the form:

Ex = kq/r² cos(θ)

Ey =  kq/r² sin(θ)

where;

Each angle of equilateral triangle = 60⁰, therefore

θ = 90 - 60⁰ = 30⁰

The sum of horizontal component of the electric field;

Ex = kQ/L² cos(30)  + kQ/L² cos(30)

Ex = 1.732kQ/L²i

The sum of vertical component of the electric field;

Ey = kQ/L² sin(30)  + kQ/L² sin(30)

Ey = kQ/L² j

The net electric field = 1.732kQ/L²i  +  kQ/L² j

= kQ/L² (1.732i + j )

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It takes the suitcase 2.49 seconds to go from point A to point C at a certain velocity.

What is velocity?

Velocity is a vector quantity that describes the rate of change of an object's position in a specific direction. It is defined as the derivative of an object's position with respect to time. Mathematically, velocity is expressed as:

v = Δx / Δt

To determine the velocity of the suitcase at the point where it strikes the ground (point C), we can use the conservation of energy principle. The suitcase starts at rest at point A, so its initial potential energy is equal to its weight multiplied by its height above the ground:

PEi = mgh

PEi = 40 lbs * 20 ft = 800 ft-lb

At point C, all of the suitcase's potential energy has been converted into kinetic energy. The kinetic energy at point C is equal to one-half the mass of the suitcase multiplied by its velocity squared:

KEf = 1/2 * m * v²

where m is the mass of the suitcase and v is its velocity at point C.

We can equate the initial potential energy to the final kinetic energy and solve for the velocity:

800 ft-lb = 1/2 * 40 lbs * v²

v² = 800 ft-lb / (1/2 * 40 lbs) = 6400 ft²/lb

v = 80 ft/s

So, the velocity of the suitcase at point C is 80 ft/s.

To find the time it takes for the suitcase to go from point A to point C, we can use the kinematic equation for motion under constant acceleration:

v = vi + at

where v is the final velocity, vi is the initial velocity (0 ft/s for this problem), a is the acceleration (which is the acceleration due to gravity, g = 32.2 ft/s²), and t is the time.

Solving for t:

t = (v - vi) / a = (80 ft/s - 0 ft/s) / 32.2 ft/s² = 2.49 s

So, it takes the suitcase 2.49 seconds to go from point A to point C at a certain velocity.

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Answer:

165s

Explanation:

see attachment.

Hope this helps!