Silver has a mass of 10.5 grams and a volume of 19.3 cm3. What is its density?

The magnitude of velocity in east direction will be 650 N approximately.

What is velocity ?

velocity is given by the change in distance by the object with respect to change in time. It is a vector quantity and having S.I unit as m/s.

Here it is given that magnitude of velocity is 750 N and making an angle of 30 degree with x axis in counterclockwise direction as shown in figure below :

Now resolving and writing magnitude of velocity V in x and y direction respectively :

\(\begin{aligned}Vcos\theta&= 750 cos30^{o}=650 \:m/s\\Vsin\theta&= 750sin30^{o}= 375 m/s\end{aligned}\)

It should be noted that \(vsin\theta\) is acting in negative y direction.

Therefore, the magnitude of velocity in east direction is 650 m/s

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Answer:

A) ( - 200t + 40 ) volts

B)  b) anticlockwise ,  c) anticlockwise , d) clockwise ,  e) clockwise

Explanation:

Given data:

magnetic flux (Φm) = 5.0t^2 − 2.0t

number of turns = 20

a) determine induced emf

E = - N \(\frac{d\beta }{dt}\)

  =  - N ( 10t - 2 ) = - 20 ( 10t - 2 )

  =  - 200t + 40  volts

b) Determine direction of induced current

i) at t = 0

 E = - 0 + 40  ( anticlockwise direction )

ii) at t = 0.10

E = -20 + 40 =  20 ( anticlockwise direction )

iii) at t = 1

E = - 200 + 40 = - 160 ( clockwise direction)

iv) at t = 2

E = -400 + 40 =  - 360 ( clockwise direction )

To find the total current in the AC circuit with parallel RLC elements, we need to calculate the impedance of each branch and then apply the rules for combining parallel impedances.

The impedance of each branch in a parallel RLC circuit can be calculated as follows:

1. For the resistor (R): The impedance (Z_R) of a resistor in an AC circuit is equal to its resistance (R). Therefore, Z_R = R.

2. For the inductor (L): The impedance (Z_L) of an inductor in an AC circuit is given by Z_L = jωL, where j is the imaginary unit, ω is the angular frequency (2πf), and L is the inductance.

3. For the capacitor (C): The impedance (Z_C) of a capacitor in an AC circuit is given by Z_C = 1/(jωC), where C is the capacitance.

The total current (I_total) can be calculated by summing the currents in each branch: I_total = I + I + I (three branches in parallel)

Now, By performing the necessary calculations using the given values, we can determine the specific values of R, L, and C for the parallel RLC circuit.

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Answer:

(a). The velocity of star is \(8.1\times10^{6}\ m/s\) and the direction of star toward the earth.

(b). The shift is 0.0168 nm.

Explanation:

Given that,

Wavelength of spectral line = 663 nm

Wavelength of spectral line in lab = 645 nm

(a). We need to calculate the velocity

Using doppler's effect

\(\Delta \lambda=\dfrac{v}{c}\lambda\)

Where, \(\Delta\lambda\)= change in wavelength

v = velocity

c = speed of light

Put the value into the formula

\(663-645=\dfrac{v}{3\times10^{8}}\times663\)

\(v=\dfrac{3\times10^{8}(663-645)}{663}\)

\(v=8144796.38\ m/s\)

\(v=8.1\times10^{6}\ m/s\)

The direction of star toward the earth.

(b). Speed = 7800 m/s

We need to calculate the shift

Using formula of shift

\(\Delta \lambda=\lambda(\sqrt{\dfrac{1+\dfrac{v}{c}}{1-\dfrac{v}{c}}}-1)\)

Put the value into the formula

\(\Delta \lambda=645\times(\sqrt{\dfrac{1+\dfrac{7800}{3\times10^{8}}}{1-\dfrac{7800}{3\times10^{8}}}}-1)\)

\(\Delta\lambda=0.0168\ nm\)

This shift is small compare to the the movement of Earth around the sun.

Hence, (a). The velocity of star is \(8.1\times10^{6}\ m/s\) and the direction of star toward the earth.

(b). The shift is 0.0168 nm.

The force required to stretch the wire by 1.0 mm is approximately 0.00013 N. Length of approximately 0.0039 m or 3.9 mm of the 8.0-mm-diameter wire would be stretched by 1.0 mm with a force of 0.00013 N.

Part A:

To calculate the force required to stretch the wire by 1.0 mm, we can use Hooke's Law, which states that the force required to stretch or compress a material is directly proportional to the displacement or change in length.

The formula to calculate the force is:

F = (Y * A * ΔL) / L

F is the force

Y is Young's modulus

A is the cross-sectional area of the wire

ΔL is the change in length of the wire

L is the original length of the wire

First, we need to calculate the cross-sectional area of the wire:

A = π * (r²)

r is the radius of the wire, which is half of the diameter.

r = 4.0 mm / 2 = 2.0 mm = 0.002 m

A = π * (0.002 m)²

A ≈ 0.000012566 m²

ΔL = 1.0 mm = 0.001 m

L = 1.0 m

Y = 10 N/m²

Plugging the values into the formula:

F = (10 N/m² * 0.000012566 m² * 0.001 m) / 1.0 m

F ≈ 0.00012566 N

Rounded to two significant figures:

F ≈ 0.00013 N

Therefore, the force required to stretch the wire by 1.0 mm is approximately 0.00013 N.

Part B:

To calculate the length of the 8.0-mm-diameter wire that would be stretched by 1.0 mm with this force, we can rearrange the formula used in Part A to solve for L.

L = (Y * A * ΔL) / F

r = 8.0 mm / 2 = 4.0 mm = 0.004 m

A = π * (0.004 m)² = 0.000050265 m²

ΔL = 1.0 mm = 0.001 m

F = 0.00013 N (from Part A)

Plugging the values into the formula:

L = (10 N/m² * 0.000050265 m² * 0.001 m) / 0.00013 N

L ≈ 0.00386 m

Rounded to two significant figures:

L ≈ 0.0039 m

Therefore, a length of approximately 0.0039 m or 3.9 mm of the 8.0-mm-diameter wire would be stretched by 1.0 mm with a force of 0.00013 N.

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Answer:

longitudianl particles are dispelled parrell

Explanation:

transverse perpendicular

Answer:

75.5 kg

Explanation:

w=mg

755= m × 10

m = 75.5

Answer:

waxing cresent and waxing gibbous

Answer:

i think it is the full moon

Explanation:

tell me if am wrong

The correct answer would be

D. Science and technology have increased food and reduced death rates due to illness and malnutrition.

I took this on USATestPrep, it's 100% right

Frost wedging is a type of physical weathering of rock.

Explanation:

Physical or mechanical weathering affects the rock structurally but does not change the chemical composition. Mechanical forces will rub, break or shatter the rock surfaces. Wedging, abrasion, exfoliation are different types of physical weathering.

Water is one of the main sources which alter the structure of the rocks physically.

Frost wedging occurring due to flow of freezing water over the rocks. This frozen water enters the rock through the cracks and crevices on the rock surface,  and will expand inside and makes the rocks to crack further and breaks it apart.

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True, Time series data can exhibit seasonal patterns of less than one month in duration is True

Seasonal patterns refer to a predictable and repeated pattern that occurs within a specific time frame. Time series data can exhibit these patterns, and they can have durations of less than one month. For instance, a sales data set may show a predictable increase in sales every week due to a specific event or promotion.

Time series data can exhibit seasonal patterns of less than one month in duration. Seasonality refers to the recurring patterns observed in the data over time. These patterns can be of any duration, not limited to monthly or yearly occurrences. For instance, weekly or daily patterns are also considered seasonal patterns.

Time series data can indeed exhibit seasonal patterns of less than one month in duration, as seasonal patterns are not limited to monthly or yearly occurrences.

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Answer:

see below

Explanation:

I will assume you made  a typo error and use 10 km rather than 10 m  

Closing speed is  2 + 3 = 5 m/s

  they will cover the 10 km (?) in    10 km / 5 m/s = 10000m /5 m/s =

                   2000 seconds =   33 min and 20 sec

Electricity is defined as the flow of electrical current through a conductor.

A fundamental type of energy that is produced by the presence and movement of electric charge is electricity. The passage of electrons or other charged particles across a conductor, like a wire, is what defines the phenomena. It includes the creation, transmission, and use of electric energy, as well as the full field of electric phenomena.

Therefore,

Electricity is defined as the flow of electrical current through a conductor.

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Thunder is caused by the rapid expansion of air surrounding a lightning bolt due to high temperatures of the lightning.

The correct statement is: Thunder is caused by the rapid expansion of air surrounding a lightning bolt due to high temperatures of the lightning, which leads to an explosive compression and subsequent release of sound waves.

When a lightning bolt occurs, it generates an immense amount of heat, reaching temperatures hotter than the surface of the Sun. This intense heat rapidly heats the surrounding air, causing it to expand explosively. The sudden expansion of air creates a shock wave that propagates through the atmosphere, resulting in the characteristic booming sound we hear as thunder.

It is important to note that thunder is not directly caused by the lightning itself. Rather, it is a byproduct of the rapid heating and subsequent expansion of the air molecules in the lightning's path. The sound waves generated by the expanding air travel through the atmosphere, reaching our ears as the familiar rumble of thunder.

The other options mentioned - compression of free photons, combustion of flammable atmospheric gases, and compression of free neutrons or electrons - are not accurate explanations for the cause of thunder. Thunder primarily arises from the rapid expansion and contraction of air due to the intense heat produced by a lightning discharge.

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Answer:

Velocidad final, V = 8 m/s

Explanation:

Dados los siguientes datos;

Velocidad inicial, u = 4 m/s

Aceleración, a = 2 m/s²

Tiempo, t = 2 segundos

Para encontrar la velocidad final (v), usaríamos la primera ecuación de movimiento;

V = u + at

Sustituyendo en la fórmula, tenemos;

V = 4 + 2*2

V = 4 + 4

Velocidad final, V = 8 m/s

The producer of refrigerator compressors needs to determine the number of kanbans required for implementing a just-in-time production line to meet the demand for 150 compressors per day from a neighboring appliance manufacturer.

To calculate the number of kanbans required, we need to consider the production lead time, safety stock factor, and optimal production quantity. The production lead time is 5 days, which means that it takes 5 days to produce a batch of compressors once the production process starts.

The safety stock factor is 17%, indicating that the producer wants to maintain an additional 17% of the daily demand as safety stock to mitigate any unforeseen fluctuations. The optimal production quantity is 95 units, which is the batch size that minimizes setup costs.

To determine the number of kanbans, we first need to calculate the total demand during the production lead time. Since the demand is 150 compressors per day and the lead time is 5 days, the total demand during the lead time is 150 compressors/day * 5 days = 750 compressors. Adding the safety stock, the total demand becomes 750 compressors + (17% * 150 compressors) = 750 compressors + 25.5 compressors = 775.5 compressors.

Next, we divide the total demand by the optimal production quantity to get the number of kanbans required. The number of kanbans is calculated as 775.5 compressors / 95 compressors per kanban = 8.16 kanbans. Since we cannot have a fraction of a kanban, we round up to the nearest whole number. Therefore, the producer of compressors requires 9 kanbans to meet the demand of 150 compressors per day from the neighboring appliance manufacturer.

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The complete question is:

A producer of refrigerator compressors wants to implement a just-in-time production line to support demand from a neighboring appliance manufacturer. Demand from the appliance manufacturer is for 150 compressors a day. The production lead time is 5 days and the producer wants to have a 17% safety stock factor. This producer has also cut setup costs such that the optimal production quantity is 95 units. How many kanbans does this producer of compressors require?

Answer:

the correxct adnswer is d

Explanation:

lol

Mechanical waves have a crest but no trough is a characteristic of a mechanical wave but not a characteristic of an electromagnetic wave.

The waves that are related to both electricity and magnetism are known as electromagnetic (EM) waves. These waves are made up of time-varying electric and magnetic fields that travel over space.

Mechanical waves have a peak but no dip, which is a mechanical wave characteristic but not an electromagnetic wave characteristic.

Hence, mechanical waves have a crest but no trough is a characteristic of a mechanical wave but not a characteristic of an electromagnetic wave.

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The particle's location vector at time t is given by: r(t) = t³ + t² + 1

As per the question, we have the velocity of the particle in polar coordinates, but we need to find the position of the particle at time t. To do this, we need to integrate the velocity vector to obtain the position vector.

Let's consider the given velocity vector:

v(t) = (3t² + 2t)i + (2t² + 3t)j

To integrate this velocity vector, we need to find the corresponding position vector. Since the velocity vector is given in polar coordinates, we can express it in terms of polar variables:

v(t) = r'(t) + r(t)θ'(t)

where r'(t) and θ'(t) are the radial and angular components of the velocity vector, respectively.

By comparing the given velocity vector with the above equation, we can write:

r'(t) = 3t² + 2t

θ'(t) = (2t²+ 3t)/r(t)

Integrating r'(t) with respect to t, we get:

r(t) = t³ + t² + C

where C is the constant of integration.

To determine the value of C, we need to use the initial condition given in the problem. The particle starts at the position r = 1 and θ = π/4 at time t = 0. This implies:

r(0) = 1

θ(0) = π/4

Substituting these values in the equation for r(t), we get:

1 = 0 + 0 + C

C = 1

Therefore, the position vector of the particle at time t is given by:

r(t) = t³ + t² + 1

To find the value of θ at time t, we integrate θ'(t) with respect to t:

θ(t) = ∫(2t² + 3t)/r(t) dt

= ∫(2t² + 3t)/(t³ + t² + 1) dt

This integral is not trivial to solve analytically. Therefore, the position of the particle at time t can be expressed as:

r(t) = (t³ + t² + 1)i + f(t)j

where f(t) is the solution of the above integral for θ(t).

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If the altitude of the North Star is 30º above the horizon, then the highest altitude that the Sun will reach during the Autumnal Equinox: is 60 degrees

The sun shines squarely on the equator at the autumnal equinox, giving both the northern and southern hemispheres an equal quantity of sunlight.

The start of the fall season is signaled by the autumnal equinox, a natural occurrence that takes place in late September every year. The celestial equator coincides with the equator of Earth, such that day and night are of equal length.

It would be 30 degrees north latitude if you could see Polaris at 30 degrees above the horizon. Now, if a star reaches its highest point at a place below the observer's zenith, its latitude is equal to 90 - star altitude.

90 - 30 = 60 degrees

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The angular momentum is constant in this case (no external torque is acting on the block), the torque is zero.

To find the torque acting on the block, we first need to find the angular momentum of the block relative to the origin at the end of 2.0 seconds.

The angular momentum of an object is given by the cross product of its position vector and its momentum vector, which can be expressed as:

L = r x p

where L is the angular momentum, r is the position vector, and p is the momentum vector.

In this case, the block starts from rest, so its initial momentum is zero.

We only need to consider the momentum of the block after it has accelerated for 2.0 seconds.

The velocity of the block after 2.0 seconds can be found using the kinematic equation:

v = v0 + at

where v0 is the initial velocity (zero), a is the acceleration, and t is the time elapsed.

Substituting the given values, we get:

v = (4.0 m/s2)(2.0 s)i - (3.0 m/s2)(2.0 s)j

v = 8.0 m/s i - 6.0 m/s j

The momentum of the block can then be calculated as:

p = mv

p = (2.0 kg)(8.0 m/s)i - (2.0 kg)(6.0 m/s)j

p = 16.0 kg m/s i - 12.0 kg m/s j

Next, we need to find the position vector of the block relative to the origin. Since the block starts 3.0 m from the origin on the positive x-axis, its position vector after 2.0 seconds can be expressed as:

r = (3.0 m + 8.0 m/s(2.0 s))i

r = 19.0 m i

Finally, we can calculate the angular momentum of the block relative to the origin:

L = r x p

L = (19.0 m i) x (16.0 kg m/s i - 12.0 kg m/s j)

L = (19.0 m)(-12.0 kg m/s) k

L = -228.0 N m k

Since torque is defined as the time derivative of angular momentum, we can find the torque acting on the block as:

τ = dL/dt

The angular momentum is constant in this case (no external torque is acting on the block), the torque is zero.

The answer is (a) 0.

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The big, soft clouds darkening as a storm approaches in the visual scene represent low spatial frequencies.

Spatial frequency refers to the rate of change of intensity or color in an image across space. It is commonly associated with the level of detail or fine-grained texture in a visual scene. In this case, the description of big, soft clouds darkening as a storm approaches suggests a decrease in fine details and a more uniform appearance, indicating a dominance of low spatial frequencies.

Low spatial frequencies correspond to large-scale variations in an image. They represent smooth and slowly changing features such as broad contours, large objects, and overall patterns. In the context of clouds, low spatial frequencies would capture the overall shape, size, and general structure of the cloud masses as they darken before a storm.

The darkening of the clouds may result from increased cloud thickness or the presence of rain or other atmospheric conditions associated with a storm. These factors can reduce the amount of light scattering through the cloud, resulting in decreased brightness and contrast, which further emphasizes the low-frequency content in the visual scene.

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Answer: c a d b

Explanation:

Glaciologists use Glen–Nye Flow Law, to predict the movements of glaciers thus, The pattern they predict in the markers over time would be C D A B.

In some parts of the world, glaciers are an important natural resource because the nature and behaviour of glaciers are an impact the hydrologic, geologic, and ecological systems of their immediate location.

Due to this, Glaciologists monitor and try to predict the movement and morphology of glaciers.

One of the techniques used by "Glaciologists" in the monitoring and prediction of glaciers in the use of markers.

The movement of markers is measured relative to the edges of the valley down which the glacier flows.

Thus, The movement of the markers are then predicted using the Glen–Nye Flow Law.

The pattern they predict in the markers over time would be C D A B.

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Answer:

43.83 nC

Explanation:

We know Q = ε₀Ψ where Q = charge enclosed by the cubic box,  ε₀ = permittivity of free space = 8.854 × 10⁻¹² F/m and Ψ = net electric flux through cubic box = 4950 Nm²/C

So, substituting the values of the variables into the equation, we have

Q = ε₀Ψ

= 8.854 × 10⁻¹² F/m × 4950 Nm²/C

= 43827.3 × 10⁻¹² C = 4.38273 × 10⁻⁸ C

= 43.8273 × 10⁻⁹ C

= 43.8273 nC

≅ 43.83 nC

Explanation:

Force= mass × acceleration

45 N = mass × 15 m/s/s

45/15 kg = mass

3kg = mass

Answer:

Energía cinética.

Explicación:

La energía cinética es un tipo de energía que se utiliza para hacer girar la turbina. La energía cinética que está presente en el fluido o el viento obliga a girar la turbina que convierte esta energía y conduce a la generación de energía eléctrica. Cuando el viento o el fluido en movimiento toca las palas de la turbina, provoca la rotación de la turbina y, debido a esta rotación, los generadores conectados a la turbina también inician un movimiento que produce energía eléctrica.

The solar wind penetrates the Earth's atmosphere much more at the geomagnetic north and south poles due to the configuration of Earth's magnetic field lines.

Earth's magnetic field is generated by its core and creates a protective shield called the magnetosphere. This shield is important because it deflects harmful solar wind particles away from Earth's atmosphere. The magnetic field lines are shaped like loops that extend from the geomagnetic north and south poles. The field lines are more concentrated and closer to the Earth's surface at the poles, which allows solar wind particles to follow these lines and penetrate deeper into the atmosphere at the poles compared to other regions. This increased penetration at the poles is what causes phenomena such as auroras, where charged particles interact with the Earth's atmosphere to create beautiful light displays.

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The force exerted on the woman by the seat belt is equal to 50 kg x 20 m/s2 = 1000 N.

Force is a push or pull that acts upon an object, causing it to accelerate or change direction. It is an influence that can cause an object to change its motion, direction, shape, or even energy. Force can be generated through direct physical contact, or it can be generated from a distance, such as when a magnet pulls on a piece of metal. Forces are measured in newtons, and the SI unit for force is the Newton (N).

The force exerted on the woman by the seat belt is equal to her mass times the acceleration experienced by the car. The acceleration of the car is equal to the change in velocity (10 m/s) divided by the time it took for the car to stop (0.50 s), which is equal to 20 m/s2. Therefore, the force exerted on the woman by the seat belt is equal to 50 kg x 20 m/s2 = 1000 N.

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