A piece of Nichrome wire has a radius of 5.00 10-4 m. It is used in a laboratory to make a heater that uses 3.00 102 W of power when connected to a voltage source of 120 V. Ignoring the effect of temperature on resistance, estimate the necessary length of wire.

Answer:

For the displacement of charge

Explanation:

When the vehicle is in motion,due to friction in air,the body of the vehicle gets charged. if accumulated, charge becomes excessive,sparking May occur and inflammable materials may catch fire. therefore metallic chains touching the ground are introduced so that the charge quickly leaks to the earth.

The molarity of the solution is 0.01196 M.  The molarity of the solution can be calculated using the formula:  Molarity = moles of solute / liters of solution

To find the moles of solute, we need to know the molar mass of copper (II) sulfate.

CuSO₄ has a molar mass of 159.61 g/mol.

Using the given information, we can calculate the moles of CuSO₄ present in the solution:

moles of CuSO₄ = mass of CuSO₄ / molar mass of CuSO₄

moles of CuSO₄ = 5.25 g / 159.61 g/mol

moles of CuSO₄ = 0.0329 mol

Now that we have the moles of solute, we can use the formula to calculate the molarity:

Molarity = moles of solute / liters of solution

Molarity = 0.0329 mol / 2.75 L

Molarity = 0.01196 M

Therefore, the molarity of the solution is 0.01196 M.

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The radius of the geostationary orbit is 4.2×10⁷m with the mass of the satellite is 650kg and the radius of the sphere is 6.4×10⁶m with the help of centripetal force.

From the given,

mass of earth(M) = 6×10²⁴ kg

Mass of satellite (m) = 650kg

the radius of the earth (r₁) = 6.4×10⁶m

The radius of the satellite(r₂) = 4.5×10⁷m

Centripetal force GMm/r² = mv²/r

  GM = v²r

angular velocity, v = ωr

 GM = ω²r²×r

 GM = ω²r³, ω = 2π/T

GM = 4π²/T²×r³            (24 hours = 60×60×24)

 r = ∛(6.67×10⁻¹¹× 6×10²⁴×(86400)²)/4π²

  = 4.2×10⁷m

Thus, the radius of the geostationary orbit is 4.2×10⁷m.

b) ΔU = (-GMm/r)initial - (-GMm/r) final

        = GM (-m/r(fin) + m/r(ini))

        = 6.67×10⁻¹¹× 6×10²⁴×(650/ 6.4×10⁶ + 650/4.2×10⁷)

        = 3.45×10¹⁰J

Thus, the change in potential energy ΔU = 3.45×10¹⁰J, increases in gravitational potential energy of the satellite during its launch from the Earth's surface to the geostationary orbit.

c) The advantage of launching satellites from the Equator in the direction of the Earth results in the consumption of low fuel. Launching near the equator coincides with the speed of Earth at the rate of 1650km per hour relative to the Earth's center.

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True, a stream of mass flow rate m and velocity u convects momentum at a rate m*u^2.

When a stream has a mass flow rate (m) and a velocity (u), the momentum of the stream is given by the product of its mass flow rate and velocity (m*u). The rate at which this momentum is convected is then given by multiplying the momentum by the velocity once more, resulting in m*u^2.

The mass flow rate equation is given by m = ρ V A. Where, ρ is density of fluid, V is velocity of fluid, A is Area of cross section.

The mass of a liquid moving through a pipe in a given amount of time is its mass flow rate. In other terms, the rate at which liquid passes through a unit area is defined as the mass flow rate.

The density, liquid movement, and cross-sectional area all have an impact on the mass flow. It is the mass moving per unit of time. The letters m and the numbers kg/s stand for mass flow.

Any object's mass can be calculated by multiplying its density by the space that it occupies. Additionally, for a fluid, the object's volume, density, and shape can all vary over time within the domain. Moreover, mass might move around the area.

Mathematically, m = ρ V A

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Answer:

Objects with mass exert forces on each other via the force of gravity. This force is proportional to the mass of the two interacting objects, and is inversely proportional to the square of the distance between them. The factors G, M, and r are the same for all masses at the surface of the Earth.

The two changes that would decrease the density of ocean water are increasing its temperature and Decreasing it's salinity​.

What is density?

Density is a measure of how much mass is contained in a given unit of volume. It is usually expressed in g/cm3 or kg/m3. It is a measure of how tightly the molecules of a substance are packed together. Density is an important physical property of a material because it affects how it interacts with other materials, how it behaves under different conditions, and how it is affected by forces such as gravity.

The density of seawater is determined by its temperature and salinity. As the temperature of seawater increases, the density of the water decreases. This is because the molecules of water expand and move farther apart as they are heated, resulting in a decrease in the mass per unit volume of water. Similarly, as the salinity of seawater decreases, the density of the water also decreases. This is because the salt in seawater increases the mass per unit volume of water, making the water denser. If the amount of salt in the water decreases, then the water will be less dense.

Therefore, increasing its temperature and Decreasing it's salinity​ decrease the density of ocean water.

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Answer:  the hunter should aim his rifle 3,422 meters above the deer to hit it.

Explanation: We can solve this problem using projectile motion equations. Let's first identify the known variables:

Distance to the deer along the line of sight (horizontal distance): d = 10,181 m

Height of the hill: h = 90 m

Muzzle velocity of the gun: v0 = 100 m/s

Acceleration due to gravity: g = 10 m/s^2

We want to find the vertical distance (height) between the hunter's location and the deer, which we can call y. We can use the following equation for the vertical motion of a projectile:

y = v0tsin(theta) - (1/2)gt^2

where t is the time it takes for the bullet to reach the deer, and theta is the angle between the line of sight and the horizontal (the angle at which the rifle is aimed).

To find t, we can use the fact that the time of flight of a projectile is given by:

T = 2v0sin(theta)/g

We can solve for sine(theta) using the fact that the horizontal distance is related to the time of flight by:

d = v0*cos(theta)*T

Combining these equations, we get:

sin(theta) = d/(2Tv0)

cos(theta) = sqrt(1 - sin^2(theta))

t = T/2

Substituting these values back into the equation for y, we get:

y = (d*t/tan(theta)) - (1/2)gt^2

Now we just need to plug in the numbers and solve for y:

sin(theta) = 90/10,181

theta = arcsin(sin(theta)) = 0.523 degrees

cos(theta) = cos(0.523) = 0.999

T = 2100sin(theta)/g = 3.189 seconds

t = T/2 = 1.595 seconds

y = (10,181*t/tan(theta)) - (1/2)gt^2 = 3,422 meters

Therefore, the hunter should aim his rifle 3,422 meters above the deer to hit it. Note that this assumes no air resistance and that the rifle is perfectly aimed. In reality, the bullet would be affected by air resistance and the trajectory would depend on the accuracy of the rifle and the shooter's skill.

Answer:

B

Explanation:

F=\(\frac{Gm1m2}{r^2}\)

F=(6.67 x 10^-11)\(\frac{63.7X9,750.6}{7.5^2}\)

F=7.36502254e-7

Answer:

Explanation:

(1) The surface area of the electrodes: Larger the surface area of the electrodes, less is the internal resistance.

(2) The distance between the electrodes: As the distance between the electrodes increases, the internal resistance of cell also increases.

The formula is given by

\(\\ \rm\Rrightarrow R=\rho\dfrac{\ell}{A}\)

On these three factors resistance depends

also

According to ohms law

Resistance also depends on voltage and current

Answer:

I think it's 2 the photo is hard to tell what they are exactly talking about.

Answer:

2.7

Explanation:

V=s÷t

v=13.5÷5.0

V=2.7

Answer:

it is an example of a translucent object

Answer: A. An ice hockey player picks up a trophy as he slides past it

Explanation:

A PE X

The statement that best describes a perfectly inelastic collision is

C. A surfer falls off of his surfboard when a wave hits him.

A collision is the interaction between two bodies in such a way that the momentum and velocity of one body gets changed due to the presence of other body. There are three types of collision-

1. Elastic collision

2. Inelastic collision

3. Perfectly inelastic collision.

In all types of collision , the momentum of the system before collision and after collision always remains same or we can say that momentum is conserved in collisions

An elastic collision is the one in which kinetic energy is also conserved and coefficient of restitution is one. Both the bodies move separately with different velocities after elastic collision.

In inelastic collision  there is a loss of kinetic energy and coefficient of restitution is less than one.

In perfectly inelastic collision there is maximum loss of kinetic energy and coefficient of restitution is zero. Both the bodies stick together after collision and move with same velocity

Coefficient of restitution is the  ratio of  relative velocity of separation after collision to relative velocity of approach before collision.

A surfer falls of his surfboard when a wave hits him is an example of perfectly inelastic collision because in this when water hits the surfers he falls of and sticks to the water , and will also now move with the velocity of water .

So  when the surfer falls off his surfboard when a wave hits him is perfectly inelastic collision.

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The arrow that indicates the direction of centripetal force on the object represented by the dot is the arrow that points towards the center of the circle.

Centripetal force is the force that keeps an object moving in a circular path. It always acts towards the center of the circle, which is why the arrow pointing towards the center of the circle represents the direction of centripetal force. In the diagram below, the object represented by the dot is moving in a circular path, and the arrow pointing towards the center of the circle represents the direction of centripetal force:

```
     ^
     |
<-----O----->
     |
     v
```

In conclusion, the arrow that indicates the direction of centripetal force on the object represented by the dot is the arrow that points towards the center of the circle.

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Answer:

C

Explanation:

The arrow labeled C, pointing towards the middle of the circle

The values for the reverse-biased silicon pn junction at T = 300 K are:

Xn ≈ 11.78 μm

Xp ≈ -10.602 μm

w ≈ 1.178 μm

|Emax| ≈ 1.53 × 10^6 V/cm

To determine the values of Xn, Xp, w, and |Emax| for a reverse-biased silicon pn junction, we can use the following equations:

1. Depletion width (w):

  w = sqrt((2 * Es * (1 / NA + 1 / No)) * (VR / q))

2. Width of the n-side depletion region (Xn):

  Xn = (NA / No) * w

3. Width of the p-side depletion region (Xp):

  Xp = w - Xn

4. Maximum electric field (|Emax|):

  |Emax| = q * (NA / (Es * No)) * Xn

Now, let's substitute the given values into the equations:

NA = 5x10^16 cm^-3 (acceptor concentration on the p-side)

No = 5x10^15 cm^-3 (donor concentration on the n-side)

T = 300 K (temperature)

VR = 8 V (reverse bias voltage)

n = 1.5x10^10 cm^-3 (intrinsic carrier concentration)

Es = 11.9 (permittivity of silicon)

First, we need to calculate the thermal voltage (VT) using the formula:

VT = (k * T) / q

  = (1.38 * 10^-23 J/K * 300 K) / (1.6 * 10^-19 C)

  = 0.0259 V

Now we can substitute the values into the equations:

w = sqrt((2 * Es * (1 / NA + 1 / No)) * (VR / q))

  = sqrt((2 * 11.9 * (1 / 5x10^16 + 1 / 5x10^15)) * (8 / 0.0259))

  ≈ 1.178 μm (micrometers)

Xn = (NA / No) * w

   = (5x10^16 / 5x10^15) * 1.178 μm

   = 11.78 μm

Xp = w - Xn

   = 1.178 μm - 11.78 μm

   = -10.602 μm (since Xp lies in the opposite direction of Xn, we consider it negative)

|Emax| = q * (NA / (Es * No)) * Xn

       = (1.6 * 10^-19 C) * (5x10^16 / (11.9 * 5x10^15)) * 11.78 μm

       ≈ 1.53 × 10^6 V/cm

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Answer:

\( \boxed{\sf Distance \ travelled = 62.5 \ m} \)

Given:

Initial velocity (u) = 25 m/s

Final velocity (v) = 0 m/s (Rest)

Time taken (t) = 5 seconds

To Find:

Distance travelled by car (s)

Explanation:

From equation of motion of object moving with uniform acceleration in straight line we have:

\( \boxed{ \bold{s = (\frac{v + u}{2} )t}}\)

By substituting value of v, u & t in the equation we get:

\( \sf \implies s = ( \frac{0 + 25}{2} ) \times 5 \\ \\ \sf \implies s = \frac{25}{2} \times 5 \\ \\ \sf \implies s = 12.5 \times 5 \\ \\ \sf \implies s = 62.5 \: m\)

\( \therefore\)

Distance travelled by car (s) = 62.5 m

The distance  car travel during that time is 62.5 meter.

Acceleration is the rate at which speed and direction of velocity vary over time. A point or object going straight ahead is accelerated when it accelerates or decelerates.

Even if the speed is constant, motion on a circle accelerates because the direction is always shifting. Both effects contribute to the acceleration for all other motions.

Initial velocity (u) = 25 m/s

As the car becomes rest, final velocity (v) = 0 m/s (Rest)

Time taken (t) = 5 seconds.

The deceleration of the car: a = (initial speed - final speed)/time interval

= ( 25 m/s - 0 m/s)/5 second

= 5 m/s²

The distance  car travel during that time = ut - at²/2

= 25 × 5.0 meter - (5×5²/2) meter

= 62.5 meter.

Hence, the distance  car travel during that time is  62.5 meter.

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The acceleration (α) of the center of the hoop: α = (mg * sin(θ)) / (2m) = (g * sin(θ)) / 2

The minimum coefficient of static friction (μmin) needed for the hoop to roll without slipping: μmin = α / (g * cos(θ)) = (g * sin(θ) / 2) / (g * cos(θ)) = tan(θ) / 2

The acceleration (α) of the center of the circular hoop can be determined by applying Newton's second law and the principle of conservation of angular momentum. Considering gravitational force (mg), normal force (N), and friction force (f) acting on the hoop, we can write:

mg * sin(θ) - f = m * α (1) (linear motion) and f * r = I * α/r (2) (angular motion)

For a hoop, the moment of inertia (I) is given by I = m * r^2. Substituting this into equation (2) and solving for f, we get:

f = m * α (3)

Now, substitute equation (3) into equation (1):

mg * sin(θ) - m * α = m * α

Rearranging the terms, we get the acceleration (α) of the center of the hoop:

α = (mg * sin(θ)) / (2m) = (g * sin(θ)) / 2

For the hoop to roll without slipping, the static friction (f) must be equal to the torque acting on the hoop. The minimum coefficient of static friction (μmin) can be determined using the frictional force equation:

f = μmin * N

Since the normal force (N) equals mg * cos(θ), the frictional force can be written as:

f = μmin * mg * cos(θ)

Now, substituting f = m * α from equation (3) into this equation, we get:

m * α = μmin * mg * cos(θ)

Rearranging the terms, we find the minimum coefficient of static friction (μmin) needed for the hoop to roll without slipping:

μmin = α / (g * cos(θ)) = (g * sin(θ) / 2) / (g * cos(θ)) = tan(θ) / 2

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Answer: long handle

Explanation: they are better for tree planting and other hole-digging. Long shovel handles can reach deep into a hole. And you'll get better leverage, which is easier on your back. ... The lighter the shovel, the easier time you will have digging.

Answer:

V = 50 volts

Explanation:

Given that,

Resistance, R = 10 ohms

Current, I = 5 A

We need to find the potential difference across the circuit. We know that,

V = IR

Put all the values,

V = 5 × 10

V = 50 volts

Hence, the potential difference is equal to 50 volts.

Answer:

A plant cell contains a large, singular vacuole that is used for storage and maintaining the shape of the cell. In contrast, animal cells have many, smaller vacuoles. Plant cells have a cell wall, as well as a cell membrane. Animal cells simply have a cell membrane, but no cell wall.

hope this helps :)

Answer:

Compare animal cell and plant cell: Both are eukaryotic cells, both contain membrane bound organelles. Both contain similar membranes such as cytosol and cytosketal elements.

Explanation:

Answer: They are all easy to perform as they are bodyweight exercises.

Explanation:

no difficult exercise so NA. Yes I was plenty of online video to watch to address issues

A web designer is one who thinks about the best way to display information on the site.

The role of Web designers is to plan, create and code internet sites and web pages, many of which combine text with sounds, pictures, graphics, and video clips. A web designer is responsible for creating the design and layout of a website or web pages.

Web designers generally establish design guidelines, standards, and best practices. They also maintain the appearance of websites by enforcing content standards. Designing visual imagery for websites and ensuring that they are in line with branding for clients.

Therefore, a web designer is one who thinks about the best way to display information on the site.

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The expression for Q in terms of N is Q = 0.99N

Sure! Here are the details step-by-step:

The initial number, N, is increased by 10% to obtain P. This means that P is equal to N plus 10% of N.

  Mathematically, this can be written as: P = N + 0.10N.

The number P is then reduced by 10% to get Q. This means that Q is equal to P minus 10% of P.

  Mathematically, this can be written as: Q = P - 0.10P.

Substituting the value of P from step 1 into the equation in step 2:

  Q = (N + 0.10N) - 0.10(N + 0.10N).

Simplifying the expression:

  Q = N + 0.10N - 0.10N - 0.01N.

Combining like terms:

  Q = N - 0.01N.

Factoring out N:

  Q = (1 - 0.01)N.

Simplifying the expression:

  Q = 0.99N.

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Explanation:

It is given that,

Initial speed of a golfer, u = 29 m/s

If it travels the maximum possible distance before landing. It means that it is projected at an angle of 45 degrees.

(a) We need to find the time spent by the ball in the air. It can be calculated by using second equation of motion.

\(s=ut+\dfrac{1}{2}at^2\)

Here,

a = -g

s = 0 (it is displacement and it is equal to 0 as the ball lands on the green).

So,

\(0=29\sin(45)t-\dfrac{1}{2}\times 9.8t^2\ (\text{Initial vertical component of velocity is taken})\\\\-4.9t^2+29\times \dfrac{1}{\sqrt2}t=0\\\\-4.9t^2+20.5t=0\\\\t=0,4.184\ s\)

So, it will take 4.184 seconds in the air.

(b) let x is the longest hole in one that the golfer can make if the ball does not roll when it hits the green. It can be given by :

\(x=vt\cos\theta\\\\x=29\times 4.184\times \cos(45)\\\\x=85.79\ m\)

Hence, this is the required solution.

Explanation:

This is the correct answer...

I hope you understand...

The amount of charge that can be placed on a capacitor depends on the capacitance, which is determined by the area of each plate.

The capacitance of a capacitor is given by the formula:

C = ε0 * (A / d)

Where:

C is the capacitance,

ε0 is the permittivity of free space (a constant value),

A is the area of each plate,

d is the separation between the plates.

To determine the amount of charge, we can rearrange the formula as:

Q = C * V

Where:

Q is the amount of charge,

V is the voltage across the capacitor.

Given that the area of each plate is 7.3 cm², we can use this information to calculate the capacitance. However, the question does not provide the voltage or any other information required to calculate the amount of charge accurately. Without knowing the voltage or other relevant parameters, it is not possible to determine the exact amount of charge that can be placed on the capacitor.

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In enzyme catalysis, binding energy is essential. Proteins known as enzymes serve as catalysts for chemical reactions by reducing the activation energy necessary for the reaction to take place.

Binding energy is the amount of power needed to separate two or more particles held together by an external force, such as the strong nuclear force or the electrostatic force. It is a crucial idea in physics and chemistry that aids in the explanation of a variety of events, including the structure of atomic nuclei and the creation of chemical bonds between atoms. Binding energy is essential in biological systems as well because it is essential for DNA replication, protein folding, and enzyme catalysis. The specificity and effectiveness of these biological processes are determined by the strength of the binding energy between a ligand and its target molecule, and even tiny changes in the binding energy can have a big impact on the system's overall performance.

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