A volume of air has a temperature of 0 degrees C. An equal volume of air that is twice as hot has a temperature ofA) 0 degrees CB) 64 degrees CC) 100 degrees CD) 273 degrees CE) none of the above choices are correct

The resistance of the person is 9200 Ω if a fault in the switch is caused by a householder to receive a mild electric shock with the mean power transfer to the person as 5.75 W and potential difference across the person as 230 V.

The resistance of the person can be calculated using Ohm’s law.

Ohm’s law states that the potential difference across a conductor is directly proportional to the current flowing through it, provided that its temperature and other physical conditions remain constant.

It can be expressed as: V = IR,

where V is the potential difference, I is the current, and R is the resistance of the conductor.

Rearranging the equation, we get: R = V/ I.

Given that the mean power transfer to the person was 5.75 W and the potential difference across the person was 230 V, the current flowing through the person can be calculated using the formula:

P = IV

where P is the power ,V is the potential difference and I is the current flowing through the person

Rearranging the equation, we get: I = P/V

Substituting the given values, we get:

I = 5.75/230 = 0.025 A

Therefore, the resistance of the person can be calculated as:

R = V/I = 230/0.025 = 9200 Ω

Hence, the resistance of the person is 9200 Ω.

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This assertion is made up and does not adequately reflect what is known about the noises or feelings felt inside a car or a pregnant woman's body.

Thus, The connection between the hum of a car engine and the buzz of blood in a pregnant woman's arteries, while it is true that some low-frequency sounds.

The vibrations can have a calming effect on people, is not substantiated by scientific data.

A automobile engine's hum is often a synthesis of mechanical noises made by numerous parts, including the exhaust system, pistons, and valves.  These noises can differ based on the engine's kind, condition, and other elements.

Thus, This assertion is made up and does not adequately reflect what is known about the noises or feelings felt inside a car or a pregnant woman's body.

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In a typical star schema, each dimension record is related to thousands of facts records.

Star schema is explicit data warehouse scheme.

It is known by the name of star schema because it has a diagram like a star and it is a schema where the centre of the star can have one fact table and then have a number of associated dimension tables.

Star schema is beneficial for fast calculations and easy works. It can help us tell the total item sold and the gains.

The examples of data in star schema is sales price, sale quantity, distant, weight, speed and weight measurements .

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The car shall not be successful since the corner must have a radius as nine times as the real corner designed for a suggested speed of 15 miles per hour.

By definition of centripetal acceleration, the square of the velocity taken by the vehicle (\(v\)), in miles per hour, is directly proportional to the radius of the corner (\(R\)), in meters. Then, we have the following relationship:

\(\frac{v_{A}^{2}}{R_{A}} = \frac{v_{B}^{2}}{R_{B}}\) (1)

Where:

If we know that \(v_{A} = 15\,\frac{mi}{h}\), \(v_{B} = 45\,\frac{mi}{h}\) and \(R_{A} = k\), then the expected radius of the corner is:

\(R_{B} = k\cdot \left(\frac{v_{B}}{v_{A}} \right)^{2}\)

\(R_{B} = 9\cdot k\)

In order to successfully take a corner at 45 miles per hour, the corner must have a radius as nine times as the real corner designed for a suggested speed of 15 miles per hour. Thus, the car shall not be successful at a speed of 45 miles per hour.

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The origin of the rings of Uranus took place from the collisional fragmentation of several moons that once were revolving around the planet.

The collisional fragmentation happened due to the moon ripped apart by tidal forces and that material captured by Uranus. After the moons that broke into several particles, they survived as narrow and dense rings around the planet.

The rings of Uranus usually consists of rock and ice, in very small diameters. Uranus is known to have 13 rings. The outermost ring of Uranus appears blue. The rings of Uranus are thin, dark and narrow compared to that of other planets. They also have the capacity to reflect light.

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Answer:

Explanation:

Mass of sofa(m) = 105 kg

Force= 403 N

F = μ*N

Where:

F = friction force = 403 [N]

μ = static coefficient

N = Normal force [N]

The normal force of a body lying on a horizontal surface can be calculated by means of the product of mass by gravitational acceleration.

mass × acceleration due to gravity = 105 × 9.8  =  1029

403= μ *1029

substitute force with 403 N and resistance with 1029 × μ

                                    403 = 1029 × μ

                                         μ = 403/1029

                                            = 0.391

Answer = 0.391

When the pool is empty, the angle between the two ends of the meter stick is approximately 63.4 degrees, and when the pool is filled with water, the angle is approximately 44.2 degrees.

a. When the pool is empty, we can treat this scenario as a simple right triangle. The horizontal distance from your eye to the center of the meter stick is half the pool width (1.5 m), and the vertical distance is the depth of the pool (3.0 m). Using the arctangent function, the angle between the two ends of the meter stick can be calculated:
angle = arctan(opposite/adjacent) = arctan(3.0/1.5) ≈ 63.4 degrees
b. When the pool is completely filled with water, light travels at a different speed, causing refraction. We can use Snell's Law to account for this change:
n1 * sin(angle1) = n2 * sin(angle2)
In this case, n1 = 1 (air), n2 = 1.33 (water), and angle1 is the angle we calculated in part a (63.4 degrees). Solving for angle2:
1 * sin(63.4) = 1.33 * sin(angle2)
angle2 = arcsin(sin(63.4)/1.33) ≈ 44.2 degrees
So, when the pool is empty, the angle between the two ends of the meter stick is approximately 63.4 degrees, and when the pool is filled with water, the angle is approximately 44.2 degrees.

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A flywheel accelerates angularly at 11 rev/min2, reaching 45 revolutions per minute in about 4.10 seconds after being turned on. In physics, "angular acceleration" refers to the speed.

Changes in angular velocity. Since spin angular velocity and orbital angular velocity are two different forms of angular velocity, respectively, there are two different types of angular acceleration. Spin angular acceleration and orbital angular acceleration are the names for these. Because there is no directional component, speed must be a scalar variable. The average speed in physics can be calculated by dividing the total distance travelled by the total amount of time.

Initial angular acceleration = 0 rev/min

Final angular acceleration = 42 rev/sec 45 = + alpha *4.10 alpha = 45/4.10 = 11 rev/min

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The acceleration of the ball while it is in contact with the wall is 4036.023 m/s²

ball strikes the wall at a speed of 17.9m/sec

after striking its goes in opposite direction with a speed of 16.0026m/sec

We have given that speed towards the wall is positive

So, u = 17.9m/sec

v = -16.0026m/sec

t = 0.0084 sec

We know that acceleration is given by

a = v-u/t

where

v = final speed

u = initial speed

t = time taken

a = v-u/t

a = 17.9 - (-16.0026) / 0.0084

a = 33.9026 / 0.0084

a = 4036.023 m/s²

So the acceleration of the ball while it is in contact with the wall is 4036.023 m/s²

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The maximum value of the induced magnetic field (Bmax) at a distance r is R from the center of the circular plates is approximately 1.028 × 10^(-7) Tesla.

To find the maximum value of the induced magnetic field (Bmax) at a distance r = R from the center of the circular plates, we can use the formula for the magnetic field generated by a circular loop of current.

The induced magnetic field at a distance r from the center of the circular plates is by:

\(B = (μ₀ / 2) * (I / R)\)

where:

B is the magnetic field,

μ₀ is the permeability of free space (approximately \(4π × 10^(-7) T·m/A),\)

I is the current flowing through the loop,

and R is the radius of the circular plates.

In this case, the current flowing through the circular plates is by the rate of change of electric charge on the plates with respect to time.

We can calculate the current by differentiating the potential difference equation with respect to time:

\(V = (180 V) sin[2π(75 Hz)t]\)

Taking the derivative with respect to time:

\(dV/dt = (180 V) * (2π(75 Hz)) * cos[2π(75 Hz)t]\)

The current (I) can be calculated as the derivative of charge (Q) with respect to time:

\(I = dQ/dt\)

Since the charge on the capacitor plates is related to the potential difference by Q = CV, where C is the capacitance, we can write:

\(I = C * (dV/dt)\)

The capacitance of a parallel-plate capacitor is by:

\(C = (ε₀ * A) / d\)

where:

ε₀ is the permittivity of free space (approximately 8.85 × 10^(-12) F/m),

A is the area of the plates,

and d is the plate separation.

The area of a circular plate is by A = πR².

Plugging these values into the equations:

\(C = (8.85 × 10^(-12) F/m) * π * (39 mm)^2 / (3.9 mm) = 1.1307 × 10^(-9) F\)

Now, we can calculate the current:

\(I = (1.1307 × 10^(-9) F) * (dV/dt)\)

To find Bmax at r = R, we need to find the current when t = 0. At this instant, the potential difference is at its maximum value (180 V), so the current is also at its maximum:

Imax = \((1.1307 × 10^(-9) F) * (180 V) * (2π(75 Hz)) * cos(0) = 2.015 × 10^(-5) A\)

Finally, we can calculate Bmax using the formula for the magnetic field:

Bmax = (μ₀ / 2) * (Imax / R)

Plugging in the values:

Bmax =\((4π × 10^(-7) T·m/A / 2) * (2.015 × 10^(-5) A / 39 mm) = 1.028 × 10^(-7) T\)

Therefore, the maximum value of the induced magnetic field (Bmax) at a distance r = R from the center of the circular plates is approximately \(1.028 × 10^(-7)\)Tesla.

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Answer:

Women's national  basketball association

Explanation:

Answer: womens national basketball association

Explanation: my dream

Answer:

Explanation:

If Tim jogs a distance of 7.2 km to the west and then he turns south and jogs 1.4 km, the resultant displacement of Tim is calculated using the pythagoras theorem as shown;

R² = 7.2²+1.4²

R² = 51.84+1.96

R² = 53.8

R = √53.8

R = 7.33 km

Hence  the resultant of Tim's jog back to the beginning is 7.33km

The angular magnification of this lens if the image is viewed by a relaxed eye with a near point of 25 cm is 0.056.

The given values are: The focal length of a converging lens is 10 cm and the near point of the relaxed eye is 25 cm. To determine the angular magnification of this lens if the image is viewed by a relaxed eye with a near point of 25 cm, we need to use the formula given below:Angular magnification, m = (-) v / uwhere v = the distance of the image from the eyeand u = the distance of the object from the eye

The near point of the relaxed eye is 25 cm, so the distance of the object from the eye, u = 25 cm.Using the formula of the lens equation, we can find the value of v:1/f = 1/v - 1/u1/10 = 1/v - 1/25v = 1/10 + 1/25v = (5 + 2) / 50v = 7/50 cmNow we can substitute the values of u and v to calculate the angular magnification:m = (-) v / um = (-) (7/50) / 25m = (-) 7 / 125m = -0.056 or 0.056 (taking magnitudes)

Therefore, the angular magnification of this lens if the image is viewed by a relaxed eye with a near point of 25 cm is 0.056.

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Answer:

Explanation:

If a ship sets out to sail to a point 154 km due north and an unexpected storm blows the ship to a point 72 km due east of its starting point, then the ships distance from the original destination can be gotten by finding the displacement of the ship and this can be gotten by using pythagoras theorem.

Let D be the unknown displacement

According to the theorem;

D² = 154² + 72²

D² = 23716 + 5184

D² = 28900

D = √28900

D = 170km

This means that the ship must now sail a distance of 170km for it to reach its original destination.

Answer:

B. square root of 72 is irrational.

D. Square root of 23 is irrational

Explanation:

square root of 72 and 23 is not a perfect square, therfore not rational

Batteries can be connected in either series or parallel to increase the voltage or current, respectively. When batteries are connected in series, the voltage is added together while the current remains the same. On the other hand, when batteries are connected in parallel, the current is added together while the voltage remains the same.

Batteries connected in series example, if two batteries with a voltage of 1.5V each are connected in series, the total voltage would be 3V. The current, however, would remain the same. This method is useful when the device you are powering requires a higher voltage but doesn't need more current.

Batteries connected in parallel example, if two batteries with a current of 1A each are connected in parallel, the total current would be 2A. The voltage, however, would remain the same. This method is useful when the device you are powering requires a higher current but doesn't need more voltage.

It is worth noting that when connecting batteries in series, the capacity of the batteries is not added together. The capacity is the amount of energy that can be stored in the battery. If two batteries with a capacity of 1Ah are connected in series, the total capacity would still be 1Ah. This is because the current is flowing through both batteries, and the capacity of each is being used. However, when connecting batteries in parallel, the capacity is added together. In the above example, the total capacity would be 2Ah.

Additionally, when batteries are connected in parallel, the state of charge of each battery should be similar. If one battery has a much higher state of charge than the other, the current will be drawn primarily from the battery with the higher state of charge, which can cause the battery to overheat, shorten its life and even cause damage.

In summary, connecting batteries in series will increase the voltage while keeping the current the same, while connecting batteries in parallel will increase the current while keeping the voltage the same. Both have their uses depending on the device that is being powered and the power requirements.

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Answer:

the density of the object is 3.33  \(\,\frac{g}{cm^3}\)

Explanation:

Use the formula for density:

\(density=\frac{M}{V}\)

where M is the mass of the object, and V its volume.

In our example, we have:

Volume V = 3 x 4 x 2 cubic cm = 24 cubic cm

Then the density is:

\(density=\frac{M}{V}=\frac{80}{24} \,\frac{g}{cm^3} =3.33 \,\frac{g}{cm^3}\)

Answer:

The KE will be multiplied by 9.

Explanation:

KE=1/2mv^2 so if velocity is tripled, KE will increase by a factor if 3^2, which is 9.

Answer:

Yes

Explanation:

The cart will definitely behave differently because more weight is added to it.

In order to successfully push a cart, the applied force must exceed the force of the weight of the cart along with its constituents and the frictional force between the tyres and the floor.

When more weights are added (the 2 packs of water bottles), it means that more force would be needed to overcome the opposing forces to the movement of the cart in order to successfully push the cart again.

i. The gravitational force between the earth and sun can be obtained as follow:

F = GM₁M₂ / r²

F = (6.67×10¯¹¹ × 5.987×10²⁴ × 1.989×10³⁰) / (1.5×10¹¹)²

F = 3.53×10²² N

Thus, the gravitational force between the earth and sun is 3.53×10²² N

ii. The gravitational force between the earth and moon can be obtained as follow:

F = GM₁M₂ / r²

F = (6.67×10¯¹¹ × 5.987×10²⁴ × 7.347×10²²) / (3.844×10⁸)²

F = 1.99×10²⁰ N

Thus, the gravitational force between the earth and moon is 1.99×10²⁰ N

Comparison = G₁ / G₂

G₁ / G₂ = 3.53×10²² / 1.99×10²⁰

G₁ / G₂ = 177

Cross multiply

G₁ = G₂ × 177

Thus, we can say that the gravitational force between the earth and sun is 177 times bigger than the gravitational force between the earth and moon

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The time it takes for a capacitor to charge depends on its capacitance and the resistance in the circuit. In this case, we have a 22-µF (microfarad) capacitor connected in series with a 90-kΩ (kiloohm) resistor.

To calculate the time it takes for the capacitor to charge, we can use the formula:

Time (in seconds) = Resistance (in ohms) × Capacitance (in farads)

First, let's convert the values to standard units:
\(22 µF = 22 × 10^-6 F\)
\(90 kΩ = 90 × 10^3 Ω\)

Now we can substitute these values into the formula:

Time = \(90 × 10^3 Ω × 22 × 10^-6 F\)

Simplifying the equation, we get:

Time = 1.98 seconds

Therefore, it will take approximately 1.98 seconds for the capacitor to charge.


The time it takes for the 22-µ capacitor to charge when connected in series with a 90-k resistor is approximately 1.98 seconds.


To calculate the charging time, we use the formula Time = Resistance × Capacitance. First, we convert the values to standard units: 22 µF becomes 22 × 10⁻⁶ F and 90 kΩ becomes 90 × 10³Ω.

Substituting these values into the formula, we get Time = 90 × 10³ Ω × 22 × 10⁻⁶ F.

Simplifying the equation gives us a charging time of 1.98 seconds.


The charging time of the capacitor is influenced by both its capacitance and the resistance in the circuit. In this case, the 22-µF capacitor takes approximately 1.98 seconds to charge when connected in series with a 90-kΩ resistor.

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You were approximately 5.72 meters away from the second baseman. The vertical drop or distance between point A and point B was approximately 0.4576 meters.

To determine the distance between you (the shortstop) and the second baseman, we can use the formula for horizontal distance (d) traveled by an object moving at a constant horizontal velocity:

d = v * t

where:

- d is the horizontal distance traveled,

- v is the horizontal velocity of the ball,

- t is the time taken.

Given that the horizontal velocity (v) is 13 m/s and the time (t) is 0.44 s, we can calculate the horizontal distance (d) as follows:

d = 13 m/s * 0.44 s = 5.72 meters

So, you were approximately 5.72 meters away from the second baseman.

To find the vertical drop or the distance between point A and point B, we need to calculate the vertical component of the ball's motion. Since the ball is thrown horizontally, it will experience a constant vertical acceleration due to gravity.

The formula to calculate the distance (d) traveled vertically in free fall is:

d = 1/2 * g * t²

where:

- d is the vertical distance traveled,

- g is the acceleration due to gravity (approximately 9.8 m/s²),

- t is the time taken.

Given that the time (t) is 0.44 s, we can calculate the vertical distance (d) as follows:

d = 1/2 * 9.8 m/s² * (0.44 s)² = 0.4576 meters

So, the vertical drop or the distance between point A and point B is approximately 0.4576 meters.

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The thrust of the rocket is 2,340,000 Newtons. The rocket engine consumes 450 kg of fuel per minute and the exhaust speed of the ejected fuel is 5.2 km/s,

To calculate the thrust of the rocket, we can use the equation:

Thrust = mass flow rate * exhaust velocity

Given that the rocket engine consumes 450 kg of fuel per minute and the exhaust speed of the ejected fuel is 5.2 km/s, we can substitute these values into the equation to find the thrust of the rocket.

First, we need to convert the exhaust velocity from km/s to m/s:

Exhaust velocity = 5.2 km/s * 1000 m/km

Exhaust velocity = 5200 m/s

Next, we can calculate the thrust using the mass flow rate and exhaust velocity:

Thrust = 450 kg/min * (5200 m/s)

Thrust = 2340000 N

Therefore, the thrust of the rocket is 2,340,000 Newtons.

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Answer:

The Total Mechanical Energy

The total amount of mechanical energy is merely the sum of the potential energy and the kinetic energy. This sum is simply referred to as the total mechanical energy (abbreviated TME).

Thermal energy and mechanical energy describes the sum of potential energy and kinetic energy of objects or systems. Correct option is D.

Potential Energy: This is the energy that an object possesses due to its position or condition. For example, a book placed on a shelf has potential energy because it can potentially fall down. The higher the object is positioned, the more potential energy it has.

Kinetic Energy: This is the energy of motion. An object that is moving has kinetic energy. The kinetic energy of an object depends on its mass and its velocity (speed).

Thermal Energy: This is the energy associated with the random motion of particles within a substance. It's related to temperature and is a form of kinetic energy at the microscopic level.

Mechanical Energy: This is the sum of potential energy and kinetic energy in a mechanical system. In other words, it accounts for both the energy an object has due to its position and the energy it has due to its motion.

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Answer:

5N westward, acting on the student

Explanation:

Answer: 5N westward, acting on the student

Explanation:

C) Refraction alters the directions of various colours or light wavelengths.

Light enters a prism through one face and is refracted as it passes through the glass. The refracted light bends at different angles for different colors or wavelengths. The different colors are then split apart and exit the prism at different angles, creating a spectrum of colors.This occurs because the glass of the prism has different refractive indices for different wavelengths of light. As a result, when white light passes through the prism, the different colors of light refract at different angles, creating a rainbow of colors. The different angles of refraction cause the light to spread out, creating the visible spectrum of colors.

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complete question:When light passes through a prism of glass,

A) the prism absorbs colors from different parts of the broad beam coming out of the prism, leaving the complementary colors that we see.

B) different colors are caused by multiple reflections within the prism and the resulting interference between the beams.

C) refraction changes the directions of different colors or wavelengths of light.

D) the prism adds colors to different parts of the outgoing and broadly scattered beam.

A transient voltage is a sudden and temporary increase in voltage or current that occurs in an electrical circuit. It can be caused by a number of factors, including lightning strikes, switching operations, or other types of electrical disturbances.

One common type of transient voltage is the "inductive kick" that occurs when loads with coils, such as motor starters and motors, are turned off. This occurs because the magnetic field created by the coil collapses, which can cause a high voltage spike in the circuit. Lightning strikes can also create transient voltages, which can damage electronic equipment and cause power outages. It is important to protect electrical systems against transient voltages by using surge protectors and other protective measures.

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The magnitude of the displacement vector of the bee will be 2 km. Because the distance between the endpoints is 2km.

A displacement is a vector in engineering and mechanics that has a length equal to the smallest distance between a point P's initial and final positions. It is a vector quantity. The SI unit of the displacement is the meter.

A honeybee leaves the hive and travels a total distance of 2 km before returning to the hive.

The bee's displacement vector will be 2 kilometers in length. Mostly due to the 2 kilometers between the terminals.

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The new volume of the gas can be found by considering the two given processes separately. First, when the pressure is halved at constant temperature, we can apply Boyle's Law, which states that the pressure and volume of an ideal gas are inversely proportional when temperature is held constant.

Therefore, if the pressure is halved, the volume of the gas will double. Second, when the initial absolute temperature is doubled at constant pressure, we can apply Charles's Law, which states that the volume and temperature of an ideal gas are directly proportional when pressure is held constant.

Therefore, if the temperature is doubled, the volume of the gas will also double. Since the volume doubled in both processes, we can conclude that the new volume of the gas, in terms of the original volume, is 2 times 2, which is 4 times the original volume.

Therefore the new volume of the gas is 4 times the original volume.

In conclusion, the new volume of the gas is 4 times the original volume.

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