Doubling the capacitance of a capacitor that is holding a constant charge causes the energy stored in that capacitor toa. decrease to one-fourth.b. quadruple.c. decrease to one-half.d. double.

Answer:the hose would explode and you would mess the water system out

Explanation:

Answer:

If you partially block the stream of water coming out of a hose, the stream of water would shoot farther then before. This is because of the opening area of nozzle. The pressure of the water forces the stream to shoot out as it rushes through the small opening. Because of this, the water can shoot farther then before. This is why a nozzle would make a rocket more effcient as the rocket would be able to fly farther distances.

J. J. Thomson used a cathode-ray tube to calculate the charge-to-mass ratio of the electron. The deflection of cathode rays towards the positively charged surface and emission of green light at the far end of the tube confirmed that they are negatively charged particles.

In 1897, J.J Thomson performed a cathode ray tube experiment to determine the charge-to-mass ratio of electrons.

Due to high voltage, a beam of particles was allowed to flow from the negatively charged end to the positively charged end of the tube.

One end of the tube was painted with phosphorous. When electrons struck the wall a green spark was observed which confirmed the presence of negatively charged particles i.e. electrons.

To put it simply, cathode rays came from the cathode tube and deflected towards a positively charged plate showing that they are negatively charged particles.

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The Ptolemaic model was a geocentric model of the Solar System developed by the ancient Greek astronomer, mathematician, and geographer Claudius Ptolemy.

According to this model, the Earth was at the center of the universe, and all the other celestial bodies revolved around it. Each planet in the Ptolemaic model was believed to move along a circular path called an "epicycle," which was centered on a point called the "deferent." The deferent, in turn, moved along a circular path around the Earth, called the "eccentric." The epicycle's center moved along the deferent at a constant rate, which gave the appearance of retrograde motion of the planet relative to the Earth. The Ptolemaic model was a complex and intricate system that required numerous epicycles, deferents, and eccentrics to explain the observed motions of the planets. While it was able to account for some of the observed planetary motions with reasonable accuracy, it had limitations and inaccuracies that became apparent as observations became more precise over time.

Here,

Eventually, the Ptolemaic model was replaced by the heliocentric model developed by Nicolaus Copernicus, which placed the Sun at the center of the Solar System and explained the observed motions of the planets more accurately.

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Answer:

5.06 m/s

Explanation:

velocity = distance / time

             = ( 25.6 - - 14.4) / 7.90 = 5.06 m/s

It takes approximately 20.09 seconds for the car to accelerate up the 2.85 meter hill.

potential energy =\(m * g * h\)

where m = 825 kg (mass of the car), g = 9.81 m/s^2 (acceleration due to gravity), and h = 2.85 m (height of the hill)

potential energy = 825 kg * 9.81 m/s^2 * 2.85 m

potential energy = 22,571 J

work = kinetic energy + potential energy

where kinetic energy = 1/2 * m * v^2

and v = 13 m/s (velocity of the car)

kinetic energy = 1/2 * 825 kg * (13 m/s)^2

kinetic energy = 703,612 J

work = 703,612 J + 22,571 J

work = 726,183 J

power = work / time

where power = 36,181 watts (output power of the car's engine)

time = work / power

time = 726,183 J / 36,181 W

time = 20.09 seconds

Acceleration can be caused by various forces, such as gravity, friction, or a pushing or pulling force. For example, when a car accelerates, the engine produces a force that propels the car forward, increasing its speed. When a skydiver jumps out of a plane, gravity causes the diver to accelerate towards the ground.

In addition to its use in physics, the term "accelerate" is also used in a broader sense to describe the process of speeding up or increasing the pace of something. For example, a company may accelerate its production schedule to meet a deadline, or an athlete may accelerate their training to improve their performance. In these contexts, acceleration refers to an increase in the rate or intensity of a process, rather than a change in velocity.

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In a fire piston, the temperature of the gas inside the piston increases due to adiabatic compression.

In physics, pressure is a measure of the force per unit area that a fluid (liquid or gas) exerts on its surroundings. It is defined as the force F acting perpendicular to a surface divided by the area A over which the force is distributed: pressure = F/A. The SI unit of pressure is the Pascal (Pa), which is defined as one Newton per square meter (N/m²). Other common units of pressure include pounds per square inch (psi), atmospheres (atm), and bar (bar). Pressure is an important concept in many areas of physics, including fluid mechanics, thermodynamics, and atmospheric science. It describes the behavior of fluids in pipes and channels, the operation of hydraulic systems, and the behavior of gases in sealed containers. The pressure of a fluid is related to its density and temperature, and can be influenced by factors such as gravity, elevation, and the motion of the fluid itself.

Here,

When the piston is rapidly pushed down into the cylinder, it compresses the gas inside the cylinder. This rapid compression causes the gas molecules to collide with each other more frequently and with greater force, which in turn increases the temperature of the gas.

Because the compression is adiabatic (i.e., no heat is allowed to enter or leave the system), the increase in temperature is due solely to the work done on the gas by the piston. This increase in temperature is known as adiabatic heating.

The fire piston is a simple but effective tool for starting a fire in the wilderness, and it demonstrates the principles of adiabatic compression and the relationship between pressure, volume, and temperature in a gas.

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Answer:

4.5V

Explanation:

In a arrangement of cells, the cells could be joined end to end(series) or to a common junction (parallel).

When cells are joined in series, the total emf of the cell is the sum of the individual emf of all the cells.

Hence;

Total emf = 1.5V + 1.5V + 1.5 V = 4.5 Volts

The correct answer is The storage and management of radioactive wastes

Explanation:

In general, nuclear reactions (changes in the nucleus of an atom such as fission) release a lot of energy including a lot of heat. Moreover, this heat is used by humans to obtain electricity and other types of energy, which is known as a nuclear power. This type of power is considered positive because it does not emit carbon and it is quite efficient.

However, in most cases, it is a threat to the environment and living beings because storing and managing the wastes of this type of power is difficult and expensive. Indeed, dealing with the wastes of nuclear power requires complex infrastructure, and any accident or leaking leads to serious consequences from the death of those exposed to the wastes to permanent loss of diversity or changes in nearby areas.

Answer:

C. The storage and management of radioactive wastes

Explanation:

Answer:

1.92 kg of nitrogen.

Explanation:

The following data were obtained from the question:

Heat absorbed (Q) = 384000 J

Note: Heat of vaporisation (ΔHv) of nitrogen = 5600 J/mol

Next, we shall determine the number of mole of nitrogen that absorbed 384000 J.

This is illustrated below:

Q = mol·ΔHv

384000 = mole of N2 x 5600

Divide both side by 5600

Mole of N2 = 384000/5600

Mole of N2 = 68.57 moles

Next, we shall convert 68.57 moles of nitrogen, N2 to grams.

This can be obtained as follow:

Molar mass of N2 = 2 x 14 = 28 g/mol.

Mole of N2 = 68.57 moles.

Mass of N2 =..?

Mole = mass /molar mass

68.57 = mass of N2 /28

Cross multiply

Mass of N2 = 68.57 x 28

Mass of N2 = 1919.96 g

Finally, we shall convert 1919.96 g to kilograms.

This can be achieved as shown below:

1000g = 1 kg

Therefore,

1919.96 g = 1919.96/1000 = 1.92 kg.

Therefore, 1.92 kg of nitrogen were burned off.

Answer:

Explanation:

i cheat on Acellus cause I dont care about school. If i did I would be going to public school... Im never gonna use this info in my life so I dont bother learning it.

Answer:

F = 159.07 N

Explanation:

Given that,

Mass of a tennis ball, m = 54.9 g = 0.0549 kg

It accelerates from rest to a speed of 45.1 m/s.

The impact with the racket gives the ball a constant acceleration over a distance of 35.1 cm = 0.351 m

We need to find the magnitude of net force acting on the ball.

Let a be the acceleration of the ball. Using third equation of motion to find it.

\(v^2-u^2=2ad\\\\a=\dfrac{v^2-u^2}{2d}\\\\a=\dfrac{(45.1)^2-(0)^2}{2\times 0.351}\\\\=2897.45\ m/s^2\)

Net force,

F = ma

F = 0.0549 kg × 2897.45 m/s²

= 159.07 N

Hence, the net force acting on the ball is 159.07 N.

Answer:

F = 9/5 C + 32     conversion from C to F

F = 9/5 * F/5 + 32

25 F = 9 F + 800

16 F = 800

F = 50  

Check:

C = 5/9 ( F - 32)  = 5/9 (50 - 32) = 10  as requested

Q = c m change in temp

Q = 1 cal/gm-deg C * 500 gm * 45 deg C = 22,500 calories

50 Fahrenheit heat required.

Heat transfer is a discipline of thermal engineering that concerns the generation, use, conversion, and exchange of thermal energy  between physical systems.

F = 9/5 C + 32     conversion from C to F

F = 9/5 * F/5 + 32

25 F = 9 F + 800

16 F = 800

F = 50

The answer is 50 Fahrenheit.

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Answer:

6 Kg.

Explanation:

From the question given above, the following data were obtained:

Force (F) = 30 N

Acceleration (a) = 5 m/s²

Mass (m) =?

Force (F) is defined as the product of mass (m) and acceleration (a). Mathematically, it can be expressed as:

Force (F) = mass (m) × acceleration (a)

F = ma

With the above formula, we can obtain the mass of the object as follow:

Force (F) = 30 N

Acceleration (a) = 5 m/s²

Mass (m) =?

F = ma

30 = m × 5

Divide both side by 5

m = 30 / 5

m = 6 Kg

Therefore, the mass of the object is 6 Kg

It takes the ball 3.06 seconds to reach its highest point

The time it takes for a ball to reach its highest point is given by the equation:

t = v / g

where

In this case, the initial velocity is 30.0 m/s and the acceleration due to gravity is \(9.8 m/s^2\). Therefore, the time it takes for the ball to reach its highest point is:

\(t = 30.0 m/s / 9.8 m/s^2 = 3.06 s\)

Therefore, it takes the ball 3.06 seconds to reach its highest point.

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Answer:

  27

Explanation:

It moves 13 meters in the first two seconds, backtracks 9 meters in the next 4 seconds, then moves forward 5 meters in the last 4 seconds. The total distance traveled is ...

  13 m + 9 m + 5 m = 27 m

_____

In the first interval, the object moves from 1 m to 14 m away from the position reference, hence a move of 13 meters.

The magnitude of the net impulse is equal to 2 times the mass (m) of the ball multiplied by the magnitude of its initial velocity (v_initial), or equal to 2m * |v_initial|.

The magnitude of the net impulse experienced by the ball can be determined using the principle of conservation of momentum. Since the ball rebounds to its original height, the change in velocity during the collision is twice the initial velocity.

The net impulse (J) can be calculated using the equation:

J = Δp

where Δp represents the change in momentum.

The momentum (p) of an object is given by:

p = m * v

where m is the mass of the object and v is its velocity.

Initially, the ball is at rest, so the initial momentum is zero (p_initial = 0).

After rebounding, the final momentum (p_final) can be calculated as follows:

p_final = m * (-2v_initial)

Since the velocity changes direction and its magnitude doubles during the collision, we use -2v_initial for the final velocity.

The change in momentum (Δp) is the difference between the final and initial momenta:

Δp = p_final - p_initial

= m * (-2v_initial) - 0

= -2m * v_initial

The magnitude of the net impulse is the absolute value of the change in momentum:

|J| = |-2m * v_initial|

= 2m * |v_initial|

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The magnitude of the net impulse is m(√(2gh) – √(2gh – kx²/m)). Net Impulse on a body is defined as the vector quantity of the product of force and time for which the force acts on a body. The impulse has the same direction as the direction of force applied.

Mathematically it can be defined as:

F.t = m.v’ – m.v

Where F is the force applied on the body for time t, v is the initial velocity of the body and v’ is the final velocity of the body.

When the ball of mass m is dropped from rest from a height h and collides elastically with the floor, it rebounds to its original height. Let us first find the velocity of the ball just before it hits the floor, using the conservation of energy principle.

Total initial energy, E1 = mgh (where m is the mass of the ball, g is the acceleration due to gravity and h is the height from which it is dropped).

At the point where it just hits the floor, total energy, E2 = 1/2 mv² + 1/2 kx², where x is the compression of the ball just after it strikes the floor, k is the spring constant of the ball, and v is the velocity of the ball just before it strikes the floor.

Since the collision is elastic, E2 = E1 => 1/2 mv² + 1/2 kx² = mgh => v = √(2gh – kx²/m)The velocity just after the rebound, v’ = √(2gh).Therefore, the change in velocity (v’ – v) = √(2gh) – √(2gh – kx²/m).The time of contact, t = √(2x/k), where x is the compression of the ball just after it strikes the floor.Net impulse = F.t = m(v’ – v) = m(√(2gh) – √(2gh – kx²/m)).Thus, the magnitude of the net impulse on the ball is given by m(√(2gh) – √(2gh – kx²/m)).

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It 4.5 hours for the light bulb to consume 8100 watt-hours of power.

The energy consumed by the light blub = 8100 watt-hours.

Let the time taken be t hours.

We know that;

Energy = power × time

Energy (E) =  8100 watt-hours

Power (P) = 1800 watt

Time (t) =?

8100 =  1800 × t

= 8100 / 1800

= 4.5 hours

The time taken by the light bulb is 4.5 hours.

Therefore, it could take 4.5 hours for the light bulb to consume 8100 watt-hours.

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Given, Speed of the sound, v=675 m/s

The wavelength of the wave, λ=15 m

Relation between speed, wavelength, and frequency of a wave is given by

Where f is the frequency of the sound.

On substituting the known values,

Which gives us,

Therefore the frequency of the sound in the given medium is 45 Hz.

Student C is right about the expected precision, according to R² values and small error bars of y-t plot compared to Vavy-t. Student D's explanation is correct, but error propagation considers Student C's claim more accurately.

According to Student C, the expected precision is higher for the y versus t plot because the error bars are small compared to the range of the data, and the R² of the fit function is way higher than for the Vavy versus t plot, which is more support for their claim.However, Student D also makes a valid point. Random fluctuations can average out, giving the same level of precision. According to error propagation, the expected precision is calculated by considering all possible sources of uncertainty. The y versus t plot could have systematic errors that are not shown by the error bars. On the other hand, the Vavy versus t plot could have random errors that may cancel each other out.The most appropriate method to determine which of the vertical acceleration values is more precise is through error propagation. By this method, systematic and random errors are considered to provide an accurate value that is valid to more digits.

Student C is right about the expected precision, according to R² values and small error bars of y-t plot compared to Vavy-t. Student D's explanation is correct, but error propagation considers Student C's claim more accurately.

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Answer:

43.3 m/s.

Explanation:

Assuming the potential energy is due to the gravitational potential energy, we can use the conservation of energy to find the kinetic energy:

Total energy = Potential energy + Kinetic energy

Kinetic energy = Total energy - Potential energy

Kinetic energy = 300 J - 40 J = 260 J

However, we need to know the mass of the object to convert the kinetic energy to velocity. We can use the potential energy to find the mass:

Potential energy = mgh

40 J = m(9.81 m/s^2)(300 m)

m = 0.137 kg

Now we can use the kinetic energy to find the velocity:

Kinetic energy = (1/2)mv^2

260 J = (1/2)(0.137 kg)v^2

v^2 = (2*260 J) / 0.137 kg

v = 43.3 m/s (rounded to one decimal place)

Therefore, the kinetic energy is 260 J and the velocity of the object when it reaches the ground is 43.3 m/s.

The angle between the normal to the plane of the coil and the direction of the magnetic field is approximately 90.08 degrees.

To determine the angle between the normal to the plane of the coil and the direction of the magnetic field, we can use the formula for the torque acting on a current-carrying coil in a magnetic field:

τ = N * B * A * sin(θ)

where:

τ is the torque,

N is the number of loops in the coil,

B is the magnetic field strength,

A is the area of each loop,

θ is the angle between the normal to the plane of the coil and the magnetic field direction.

Given:

N = 5 loops

B = 0.5 T

A = π * (d/2)^2 = π * (1.0 m/2)^2 = π * (0.5 m)^2 = 0.7854 m² (area of each loop)

τ = 3.93 N·m

Rearranging the formula, we can solve for θ:

θ = arcsin(τ / (N * B * A))

θ = arcsin(3.93 N·m / (5 loops * 0.5 T * 0.7854 m²))

θ ≈ arcsin(1.0002)

Using a calculator, we find that the angle θ is approximately 90.08 degrees.

Therefore, the angle between the normal to the plane of the coil and the direction of the magnetic field is approximately 90.08 degrees.

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Answer:

The mass is 1200 kilograms

Explanation:

Because Force is equal to mass times acceleration (F=m×a)

F=m×a

1800N=?×1.5

1800÷1.5=1200

1800N=1200Kg×1.5

When a material is reflective, it would cause the light that meets it to bounce off while a transparent material would make the light to pass through it.

Light is a form of energy that produces a sensation that is visible to the optical eye. We know that a material is said to be transparent if the material can allow light to pass through it. A material is said to be reflective when it bounces off the rays of light that fall on it.

We can see that when light interacts with the transparent material, the light can pass through the material. If the light interacts with the reflective material then the light rays are seen to bounce off the light rays.

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Answer:

Student science investigatory projects provide students practical experience in using the scientific method and help stimulate their interest in scientific inquiry. Given the benefits society can realise from professional scientific inquiry, such goals in themselves have importance.

Answer:

¢

Explanation:

Given that:

Mass of metal = 12g = 0.012

Density of metal = 4 g/cm³ = 4000kg/m³

Density of oil = 1.5g/cm³ = 1500 kg/m³

Recall : density = mass / volume

Volume of metal, V = mass / density = 0.012/ 4000 = 0.000003

0.000003

T + Density of oil * g * V - (0.012 * 9.8) = 0

T + 1500 * 9.8 * 0.000003 - 0.1176 = 0

T = 0.0441 - 0.1176 = 0

T = 0.1176 - 0.0441

T = 0.0735N

Tension, T

Answer:

dumpster mass

Explanation:

you will need the mass of the dumpster to calculate using conservation of momentum

Answer:

The source of Jupiter's intense magnetic field is believed to be a dynamo effect generated by the motion of electrically conducting materials within its deep interior.

Electrical currents in the planet's outer core, which is made of liquid metallic hydrogen, are what create Jupiter's internal magnetic field.

Jupiter has the strongest magnetic field of any planet in the solar system, with a magnetic field strength of approximately 4.3 gauss (430 µT) at the equator. It is caused by Jupiter's liquid metallic hydrogen core, which rotates at a different rate from the planet's outer envelope.

This generates electric currents in the region where the metallic hydrogen layer meets the atmosphere, resulting in a powerful magnetic field that extends far into space.

Jupiter is the largest planet in the Solar System and the fifth from the Sun. It is a gas giant with a mass that is slightly less than one one-thousandth the Sun's and more than twice as much as all the other planets in the Solar System put together.

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For the light beam

a) The index of refraction is 2.24.

b) The wavelength of the same light in air is 551.04 nm.

c) the angle is 17.14°.

(a) The refraction index of the diamond at this wavelength can be found using the formula n=c/v, where c is the speed of light in a vacuum and v is the speed of light in a diamond.

n = c/v = 3.00 x 10^8 m/s / 1.34 x 10^8 m/s = 2.24

Therefore, the index of refraction of the diamond at this wavelength is 2.24.

(b) When light travels through air, its wavelength changes due to the change in the medium, but its frequency remains the same. The relationship between the speed, frequency, and wavelength of light is given by the formula c = λf, where c is the speed of light, λ is the wavelength, and f is the frequency.

We can rearrange this formula to solve for the new wavelength:

λ_air = c/f = (c/v) λ_diamond = n λ_diamond

where n is the index of refraction of a diamond. Substituting the values given,

λ_air = 2.24 x 246 nm = 551.04 nm

Therefore, the wavelength of the same light in air is 551.04 nm.

(c) According to Snell's law, n1 sinθ1 = n2 sinθ2, where n1 and n2 are the indices of refraction of the initial and final mediums, and θ1 and θ2 are the angles of incidence and refraction, respectively, with respect to the normal.

We can rearrange this formula to solve for θ2:

sinθ2 = (n1 / n2) sinθ1

Substituting the values given, we get:

sinθ2 = (1 / 2.24) sin 15°

θ2 = sin⁻¹(0.295) = 17.14°

Therefore, the angle at which the light ray will be refracted into the air is 17.14°.

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