a circular swimming pool has a diameter of 20 m. the circular side of the pool is 4 m high, and the depth of the water is 3.5 m. (the acceleration due to gravity is 9.8 and the density of water is 1000 .) how much work (in joules) is required to:

Answer:

A) R = 190.42 Ω

B) P = 5.325 W

Explanation:

We are given;

Total power;P_tot = 7.1 W

Voltage;V = 26 V

A)We are told that while the battery is still connected, one of the resistors is heated, so that its resistance doubles.

Thus, the power is doubled.

Now, formula for power is;

P = IV

Thus, since power is doubled, we have;

P = 2(IV)

Now, formula for current is; I = V/R

So, P = 2V²/R

Making R the subject, we have;

R = 2V²/P

In this question, P is p_total = 7.1 W

Thus;

R = (2 × 26²)/7.1

R = 190.42 Ω

B) Now, the resistance of the resistors are R and 2R.

Formula for power in this context is;

P = V²/R

Thus,

Total power delivered to the resistors is;

P = V²/R + V²/2R

P = 3V²/2R

P = (3 × 26²)/(2 × 190.42)

P = 5.325 W

Answer:

50

Explanation:

200 divided by 4 gives you the mass of 50

The speed of light in crown glass if the index of refraction for crown glass is 1.52 is 1.97 x \(10^8\) m/s.

The speed of light in a medium can be calculated using the equation:

v = c / n,

where v is the speed of light in the medium, c is the speed of light in a vacuum (approximately 3.00 x \(10^8\) m/s), and n is the refractive index of the medium.

Given that the index of refraction for crown glass is 1.52, we can substitute these values into the equation:

v = (3.00 x \(10^8\) m/s) / 1.52.

Calculating the value:

v ≈ 1.97 x \(10^8\) m/s.

Therefore, the speed of light in crown glass is approximately 1.97 x \(10^8\) m/s.

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Answer:

\( \boxed{\sf Volume \ of \ cube \ (V) = \frac{1}{125} \ in^3} \)

Given:

Side length of the cube (a) = \( \sf \frac{1}{5} \) in

To Find:

Volume of the cube (V)

Explanation:

Volume of cube = (side length)³

\( \boxed{ \bold{V = a^3}}\)

Substituting value of a in the formula:

\( \sf \implies V = {( \frac{1}{5} )}^{3} \\ \\ \sf \implies V = \frac{ {1}^{3} }{ {5}^{3} } \\ \\ \sf \implies V = \frac{1}{ {5}^{3} } \\ \\ \sf \implies V = \frac{1}{125} \: {in}^{3} \)

Answer:

2 Joules

Explanation:

Kinetic Energy = 1/2 of (Mass x Velocity^2)

Answer: San diego

Because it is closer to the ocean

Term which is used to  define a complete path for current flow without any kind of break is closed circuit.

A circuit is the pathway of current. Circuits have two ends. A positive terminal and a negative terminal. The electrons are moving from negative terminal to the positive terminal.

The current flow in the opposite direction of electrons thus, from positive terminal to the negative terminal. There are both closed circuits and open circuits.

In an open circuits the current is zero. In a closed circuit, there is a net current flow through the circuit. The circuits can be made open or closed with the devices called switches.

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Loose objects on the dashboard slide to the right when the car turns suddenly to the left because they have inertia

When loose objects are placed on the dashboard of a car, they may slide to the right when the car turns suddenly to the left. objects at rest tend to stay at rest and objects in motion tend to stay in motion. As the car turns left, there is a force pushing the loose objects to the right, and gravity alone is not strong enough to hold them in place. Therefore, the objects slide to the right due to their inertia. To prevent this, it's best to secure loose objects on the dashboard or remove them altogether to ensure safety while driving.

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Answer:

The correct solution is "\(5\times 10^{-4}\) %".

Explanation:

The given values are:

Pressure,

\(\Delta P=7\times 10^5 \ N/m\)

for copper,

\(B=14\times 10^{10} \ N/m\)

As we know,

The Bulk Modulus (B) = \(\frac{\Delta P}{-\frac{\Delta V}{V} }\)

or,

The decrease in volume will be:

= \((\frac{\Delta V}{V})\times 100 \ percent\)

then,

= \(\frac{\Delta P}{B}\times 100 \ percent\)

On putting the values, we get

= \(\frac{7\times 10^5}{14\times 10^{10}}\times 100 \ percent\)

= \(5\times 10^{-4} \ percent\)

Answer:

ididate is a good one and

The marginal propensity to save (MPS) is equal to 0.2. The autonomous spending multiplier (ASM) is equal to 5.

The marginal propensity to save (MPS) is the portion of each additional dollar of income that a person saves. Given that the marginal propensity to consume (MPC) is equal to 0.8, we can calculate the MPS by subtracting the MPC from 1.

MPS = 1 - MPC = 1 - 0.8 = 0.2.

Therefore, the marginal propensity to save is equal to 0.2.

The autonomous spending multiplier (ASM) is the factor by which autonomous spending is multiplied to determine the total change in output or income in an economy. It is calculated using the formula:

ASM = 1 / (1 - MPC).

Substituting the given MPC value of 0.8 into the formula, we get:

ASM = 1 / (1 - 0.8) = 1 / 0.2 = 5.

Hence, the autonomous spending multiplier is equal to 5.

In summary:
- The marginal propensity to save (MPS) is equal to 0.2.
- The autonomous spending multiplier (ASM) is equal to 5.

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Answer:

\(\boxed {\boxed {\sf D. \ 6.02*10^{23} \ atoms}}\)

Explanation:

One mole of a substance contains the same amount of representative particles. These particles can be atoms, molecules, ions, or formula units. In this case, the particles are atoms of titanium.

Regardless of the particles, there will always be 6.02*10²³ (also known as Avogadro's Number) particles in one mole of a substance.

Therefore, the best answer for 1 mole of titanium is D. 6.02*10²³ atoms.

Answer:

D) 6.02 x 1023

Explanation:

A.P.E.X

Answer:

Explanation:

Explanation:

(a)

We get the time taken to reach the maximum height by using the vertical component of the velocity:

v=u+at

∴ 0=25sin60−9.8t

∴ t=21.65/9.8=2.21s

By inference the return to earth will take the same time, assuming a level playing field.

∴ total time in flight =2×2.21=4.42s

(b)

The horizontal component of velocity is constant so we get:

Distance = speed x time=25cos60×4.42=55.25m

Answer:

Explanation:

Let the potential difference between the middle point and one of the plate be ΔV .

electric potential energy will be lost and it will be converted into kinetic energy .

Electrical potential energy lost = Vq , where q is charge on charge particle .

For proton

ΔV× q = 1/2 M V² ( kinetic energy of proton )

where M is mass and V be final velocity of proton .

For electron

ΔV× q = 1/2 m v² ( kinetic energy of electron  )

where m is mass and v be final velocity of electron . Charges on proton and electron are same in magnitude .

As LHS of both the equation are same , RHS will also be same . That means the kinetic energy of both proton and electron will be same

1/2 M V² =  1/2 m v²

(V / v )² = ( m / M )

(V / v ) = √ ( m / M )

In other words , their velocities  are  inversely proportional to square root of their masses .

Answer:

b

Explanation:

negativity sure ans bro

The specific heat of Al is greater than that of water. Therefore, adding Al wire will increase the temperature of water in the calorimeter. While adding the Pb pellets will decrease the temperature.

Calorimetry is an analytical technique used to determine the heat energy absorbed or released by a system. The calorimetric equation connecting the heat change q with mass of the substance m, specific heat capacity c and the temperature difference ΔT is:

q = m c ΔT

The specific heat of a substance is the heat energy required to increase the temperature by one degree Celsius per one gram. Higher the specific heat, higher be the rate of cooling or heating.

The heat gained by water from steel will be greater than that of Al because specific heat of steel is greater. Lead has very small specific heat and the temperature change will be smaller.

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Answer:

aluminum wire = 2.6c

steel wire = 1.5c

lead pellets = 0.8c

Explanation:

The resolution of an optical microscope can be increased by immersing the objective lens and the sample in a transparent oil because it reduces the refractive index mismatch between the air and the sample, thereby increasing the numerical aperture (NA) of the objective lens. The numerical aperture is a measure of the lens's ability to gather light, and a larger NA means a higher resolution.

When the lens is immersed in oil, the light passing through it is refracted less, and more light can pass through the sample. This results in a sharper and clearer image of the sample, which is particularly useful when studying small structures or features.

The use of oil immersion is a common technique in high-resolution microscopy, such as in confocal or fluorescence microscopy.

The resolution of an optical microscope can be increased by immersing the objective lens and the sample in a transparent oil due to the change in refractive index. The refractive index of oil is higher than that of air, which increases the numerical aperture (NA) of the microscope.

A higher numerical aperture allows the objective lens to collect more light and focus it at a smaller point, ultimately improving the resolution of the image. This method, known as oil immersion, helps in minimizing the light scattering and maximizing the light gathering capability of the lens, enabling the microscope to achieve better resolution and contrast.

In summary, oil immersion enhances the resolution of an optical microscope by increasing the numerical aperture through its higher refractive index, allowing for more detailed observations of samples.

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The First Law of Thermodynamics which states that the change in internal energy of a system is equal to the heat transferred into the system minus the work done by the system. Mathematically, it can be represented as ΔU = Q - W

where ΔU is the change in internal energy, Q is the heat transferred into the system, and W is the work done by the system
In this case, we know that the internal energy of the system decreases by 125 J and the system performs 30.5 J of work. Therefore, we can write:
ΔU = -125 J
W = -30.5 J (since work is done by the system, it is negative)
Substituting these values in the first law equation, we get:
-125 J = Q - (-30.5 J)
Simplifying this, we get:
Q = -125 J - (-30.5 J)
Q = -94.5 J

Since the heat transferred into the system cannot be negative (it represents energy added to the system), we take the absolute value of Q is 94.5 J

Therefore, 94.5 J of heat is transferred into the system when its internal energy decreases by 125 J while it was performing 30.5 J of work.

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The name of the gravitational force acting on a mass on the surface of the Earth is gravity larger masses have stronger  gravitational fields. If the field is stronger on a planet, objects will accelerate towards the ground at a faster  rate.​

Gravity is a force that attracts two objects with mass towards each other. It is the force that gives weight to physical objects and is what keeps us grounded on the surface of the Earth.

Therefore, The strength of the gravitational field depends on the mass of the object creating the field and the distance from the object. The larger the mass of the object, the stronger the gravitational field. The closer an object is to the source of the gravitational field, the stronger the field will be.

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The name of the gravitational force acting on a mass on the surface of the Earth is weight.

Larger masses have greater  gravitational fields.

If the field is stronger on a planet, objects will accelerate towards the ground at a constant rate.​

Gravitational force is described as the force of attraction between all masses in the universe more especially the attraction of the earth's mass for bodies near its surface.

This is better explained by Newton's law of universal gravitation states that every particle attracts every other particle in the universe with a force that is proportional to the product of their masses and inversely proportional to the square of the distance between their centers.

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Answer:

cyber physical verbal

Explanation:

these are types of bullying

Answer:

Physical, Social, Verbal, and Cyber are different kinds of bullying.

Explanation:

Physical Bullying- Physical bullying is the use of physical actions to intimidate and gain control over a target. The physical actions are unwanted by the victim and can either cause damage to their body or possessions. This behavior is all too common in schools.

Social Bullying- Social bullying is deliberate, repetitive, and aggressive social behavior intended to hurt others. This type of behavior generally includes gossip or other actions that cause mental and emotional harm and social isolation for the victim.

Verbal Bullying- Verbal bullying is intended to degrade, demean, or insult the target person, which might affect their mental, physical, emotional, and psychological health. A bully might make comments about the appearance, gender, race, and weight of the bullied.

Cyber Bullying- Cyberbullying is bullying with the use of digital technologies. It can take place on social media, messaging platforms, gaming platforms, and mobile phones. It is repeated behavior, aimed at scaring, angering, or shaming those who are targeted.

A degausser device can be used to erase the contents of a hard drive using a magnetic field.

A degausser is a tool that generates a strong magnetic field that can erase the data stored on magnetic media such as hard drives, tapes, and floppy disks. This is done by exposing the media to a changing magnetic field that effectively randomizes the data, making it unrecoverable. Degaussers are often used by organizations that need to dispose of sensitive data securely, such as government agencies or financial institutions.

It is important to note that not all hard drives can be effectively erased using a degausser, and other methods such as physical destruction or software-based wiping may be necessary in some cases.

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The distance the wagons travel until the spring is fully compressed is 2 × xmax = 3.42 m. To solve this problem, we need to apply the principle of conservation of momentum and conservation of energy.

Initially, the momentum of the system is given by:

p1 = (15 kg + 5 kg) × 3.75 m/s = 75 kg m/s

After the collision, the two wagons stick together and move as one unit, with a combined mass of 30 kg. Let v be the common velocity of the two wagons after the collision. Then, the momentum of the system is given by:

p2 = 30 kg × v

According to the principle of conservation of momentum, p1 = p2. Therefore, we have:

75 kg m/s = 30 kg × v

which gives:

v = 2.5 m/s

Now, let's consider the energy of the system. Initially, the kinetic energy of the system is given by:

K1 = (1/2) × (15 kg + 5 kg) × (3.75 m/s)² = 421.875 J

After the collision, the energy of the system is stored in the compressed spring. The potential energy of a spring is given by:

U = (1/2) × k × x²

where k is the spring constant and x is the displacement of the spring from its equilibrium position. At maximum compression, the displacement is xmax, and the potential energy is:

Umax = (1/2) × 250 N/m × xmax²

According to the principle of conservation of energy, the initial kinetic energy of the system is converted to potential energy of the spring at maximum compression. Therefore, we have:

K1 = Umax

which gives:

xmax = sqrt(2 × K1 / k) = 1.71 m

Therefore, the distance the wagons travel until the spring is fully compressed is 2 × xmax = 3.42 m.

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Answer:

below

Explanation:

300 000 km = 300 000 000 m

c = wl * f

3 x 10^8   =  300 000 000 m    *  f

1 hz = f

The language of the given pushdown automaton (PDA) can be described as follows:

The PDA has a stack alphabet consisting of symbols 'a', 'b', 'z', '6', '1', '۸', '2', '9', '0', 'x', 'y'. 'z' represents the stack end symbol.

The transitions of the pushdown automaton (PDA) are as follows:

Thus, the language accepted by this PDA is characterized by a sequence of 'a's followed by a sequence of 'b's, where the number of 'b's is three times the number of 'a's, and each 'b' is followed by a corresponding sequence of '90', '91', '92', 'a', 'b', 'b', 'b', '1', 'b', 'b', '1', and ending with '1'.

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Answer:

1606

The main reason for using light years, however, is because the distances we deal with in space are immense. If we stick to miles or kilometers we quickly run into unwieldy numbers just measuring the distance to the nearest star: a dim red dwarf called Proxima Centauri that sits a mere 24,000,000,000,000 miles away!

Explanation:

The mass of the second block is 1.0 kg.

We can use Newton's Second Law of Motion which states that the net force acting on an object is equal to its mass times its acceleration.

For the first block, we know that its mass is 3.0 kg and its acceleration is 2.0 m/s2, so we can calculate the net force acting on it:

net force = mass x acceleration
net force = 3.0 kg x 2.0 m/s2
net force = 6.0 N

Now, we can use the same net force to find the mass of the second block:

net force = mass x acceleration
6.0 N = mass x 6.0 m/s2

Solving for mass:

mass = 6.0 N / 6.0 m/s2
mass = 1.0 kg

Therefore, the mass is 1.0 kg.

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The speed of the wave is 11 m/s, the wavelength is 1 m, and the period is 0.1 seconds.

The given information describes the characteristics of a wave. The speed of the wave, which represents how fast it propagates through a medium, is stated as 11 m/s. The wavelength, which is the distance between two consecutive points in the wave that are in phase, is mentioned as 1 m. The period, which refers to the time it takes for one complete cycle of the wave, is given as 0.1 seconds.

These parameters are fundamental properties of a wave and are interconnected through the wave equation: speed = wavelength / period. Understanding these values helps in analyzing the behavior and properties of the wave, such as its frequency and amplitude, and allows for further exploration of wave phenomena in various fields, including physics and engineering.

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The winds aloft chart for the Great Lakes (Michigan is fine) region displays the wind direction and speed at several altitudes. At 3000 feet, the wind speed is approximately 17 knots.

At 12,000 feet, the wind speed is about 44 knots. The wind speed at FL350 is approximately 67 knots.Surface friction has an effect on the winds close to the ground, slowing them down due to the frictional force exerted on the ground by air molecules. The winds shift direction with altitude, veering to the right of the direction of travel in the northern hemisphere. The approximate location of the Jetstream can be obtained by examining the wind/temperature plot chart. The fastest wind speed at FL360 appears to be approximately 145 knots, traveling towards the northeast. Flight to the east or southeast would benefit from this wind speed.Seasonally, winds aloft change depending on the position of the jet stream, which moves towards the poles during the summer months and towards the equator during the winter months.

The current surface analysis chart (Prog chart) shows the major frontal activity passing through the Midwest states. Precipitation is what leads the frontal passage in general, with both temperature and wind speed/direction changing from behind to ahead of the front.

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Answer: acting, lying, or being across : set crosswise. 2 : made at right angles to the long axis of the body a transverse section.

Explanation: