what time will the northern lights be visible tonight?

Answer:

the answer is b.

plsss pa brainliest po ako

Answer:

a. Light bulb - electrical to light

b. Firework - chemical to light / thermal / sound

c. Flute - kinetic to sound

d. Leaf-  solar to chemical

Answer:

Yes, 54 inches is below the average height for an 11-year-old boy or girl. The average height for an 11-year-old boy is 56.4 inches, and the average height for an 11-year-old girl is 56.7 inches. However, it is important to remember that height can vary widely from person to person, and there is no single "normal" height. Some children may be naturally shorter or taller than average, and this is perfectly normal. If you are concerned about your child's height, it is always a good idea to talk to their doctor.

Here are some things that can affect a child's height:

The current in each loop of the solenoid is 6.25 A. current is placed inside the solenoid, we can assume that the current passing through each loop is the same.

The solenoid is 17 cm long and has 800 loops of wire. Since the wire carrying the 5.0 A current is placed inside the solenoid, we can assume that the current passing through each loop is the same.

To find the current in each loop, we can use the formula:

I_solenoid = N * I_wire

Where:

I_solenoid is the current in the solenoid,

N is the number of loops,

I_wire is the current in the wire.

Plugging in the values, we have:

I_solenoid = 800 * I_wire

5.0 A = 800 * I_wire

Solving for I_wire, we get:

I_wire = 5.0 A / 800 = 0.00625 A

Therefore, the current in each loop of the solenoid is 6.25 A.

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The 14.317 g sample of sodium sulfate, you have approximately 6.058 × 10^22 molecules of sodium sulfate.

To find the number of molecules of sodium sulfate in a sample, you need to use Avogadro's number and the molar mass of sodium sulfate.
1. Calculate the number of moles of sodium sulfate in the sample by dividing the given mass (14.317 g) by the molar mass of sodium sulfate.

The molar mass of sodium sulfate is 142.04 g/mol.
  Number of moles = mass / molar mass
                 = 14.317 g / 142.04 g/mol
                 = 0.1007 mol (rounded to four decimal places)

2. Use Avogadro's number,

which is 6.022 × 10^23 molecules/mol, to convert the number of moles of sodium sulfate to molecules.
  Number of molecules = number of moles × Avogadro's number
                      = 0.1007 mol × 6.022 × 10^23 molecules/mol
                      ≈ 6.058 × 10^22 molecules

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The force implemented at the rod is  P=zero.25lb P = zero.25 l b. the burden of the rod is  w=1.75lb w = 1. seventy-five lb. The kinematic diagram of the rod.

Friction is any point in the consumer's journey with an organization wherein they hit a snag that slows them down or causes dissatisfaction. in the most primary concept, offering frictionless customer support way tracking the consumer adventure and improving the consumer revel in.

The overwhelming consensus is that ice has low friction because of a skinny film of liquid water coating its surface. for this reason, skaters balanced on skinny steel blades can float easily throughout the ice rink, but grind to a halt at the timber ground beyond.

Motion is certainly viable without friction even though an item is stationary in a single reference frame, in some other reference body shifting with admire the first, that identical object may be seen to be transferring. So movement actually does not need friction at all.

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Answer:14C

Explanation:

The drag force of a boat with a wet surface area of 60ft² and traveling at 7.5mph is approximately 137.72N.

We know that the drag force F varies jointly with the wet surface area A and the square of the speed S. We can express this relationship as F = kAS², where k is a constant of proportionality.

To find k, we can use the given information: A = 50ft², S = 7mph, and F = 98N. Plugging these values into the formula, we get 98 = k(50)(7²). Solving for k, we find that k ≈ 0.04.

Now, we can find the drag force for a boat with a wet surface area of 60ft² and traveling at 7.5mph. Using the formula F = kAS² and the calculated k value, we get F = 0.04(60)(7.5²). Calculating this, we find that the drag force is approximately 137.72N.

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An expression for the pressure gradient in the x direction a - bc = 0,c = - 0.006418.

As given ρ = c

Momentum in x,

ρ \(\frac{du}{dt}\) = ρ gx - \(\frac{dp}{dx}\) + μ (\(\frac{d^2u}{dy^2}\) + \(\frac{d^2u}{dy^3}\) + \(\frac{d^u}{dz^2}\))

u = ay - b(y - \(y^{2}\))

dp/dx = 2bμ

T = 0, du/dy = 0

a - bc = 0

c = - 0.006418

The pressure gradient, which is a physical term used in atmospheric science to indicate the direction and rate at which pressure rises most quickly around a certain site, is normally defined as being of air, although it can also more broadly refer to any fluid momentum. Pascals per meter (Pa/m) is a dimensional unit used to express the pressure gradient. The gradient of pressure as a function of position is what it is mathematically referred to as. The force density is the name for the negative gradient of pressure.

Pressure gradients in petroleum geology and petrochemical sciences relevant to oil wells, and more especially in hydrostatics, refer to the gradient of vertical pressure in a column of fluid within a wellbore and are often stated in pounds per square inch per foot (psi/ft)

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Answer:

The average velocity of the ball is 1.355 cm/s.

Explanation:

Given;

initial displacement of the ball, x₁ = 8.4 cm

final displacement of the ball, x₂ = 4.2 cm

initial time, t₁ = 3.0 s

final time, t₂ = 6.1 s

The average velocity of the ball is calculated as;

\(v = \frac{\Delta x}{\Delta t} \\\\v = \frac{8.4\ cm\ - \ 4.2 \ cm}{6.1 s - \ 3.0 s} \\\\v = 1.355 \ cm/s\)

Therefore, the average velocity of the ball is 1.355 cm/s.

The main reason for the difference in precipitation in the two locations is due to the difference in temperature. When temperatures are cold enough, the water vapor in the air will condense and form snowflakes.

The temperature in Ohio is likely not cold enough for snow, but the temperature in Pennsylvania is cold enough for the water vapor in the air to turn into snowflakes. The temperature in a given area is determined by a variety of factors, such as air pressure, humidity, and wind speed. Each of these factors can be different in each location, which can lead to a difference in temperature and, ultimately, a difference in precipitation.

Air pressure is the pressure of the atmosphere at a particular location as the higher the air pressure, the warmer the temperature. The humidity determines the amount of water vapor in the air and as the higher the humidity, the more water vapor is in the air and the more likely it is to condense into snow. Wind speed is the speed of the wind at a particular location also the faster the wind, the colder the temperature.

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A quarter as bright.

So if you are twice as far away from the light source, it should appear a quarter as bright. Scientists call this the "inverse square law." Mathematically, you can find the relative brightness of two objects by comparing their relative distances from you, squaring that value, and then inverting it.

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In every energy transfer and transformation, some energy is transformed into _____ ______

Answer:

Thermal Energy

The radius of curvature of the track at the instant the train is 6s into the curve and experiences a horizontal acceleration of 2 m/s2 is 266m.

To calculate the radius of curvature, we need to consider the relationship between the horizontal acceleration, velocity, and radius. The formula for centripetal acceleration is given as a = v^2/r, where a is the horizontal acceleration, v is the velocity, and r is the radius of curvature.

Since the train slows down with constant deceleration from 100 km/h to 50 km/h in 12s, we can calculate the average velocity for the 6s time frame, which is (100 + 50)/2 = 75 km/h.

Converting this to m/s, we get 75 km/h = 20.83 m/s. Plugging this into the formula, we have

Where a is the horizontal acceleration of 2 m/s2. Solving for r, we get:

This is the radius of curvature of the track at the instant the train is 6s into the curve and experiences a horizontal acceleration of 2 m/s2.

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Answer:

4s

Explanation:

Using the formula of motion as follows:

V = u + at

Where;

V = final velocity (m/s)

U = initial velocity (m/s)

a = acceleration (m/s)

t = time (s)

Based on the provided information, v = 160m/s, u = 100m/s, a = 15m/s², t = ?

V = u + at

160 = 100 + 15t

160 - 100 = 15t

60 = 15t

t = 60/15

t = 4seconds.

Therefore, the time it takes for the plane to complete this increase in speed is 4s.

Answer:

c

Explanation:

London dispersion forces are weak intermolecular forces and are considered van der Waals forces. Temporary dipoles can occur in non-polar molecules when the electrons that constantly orbit the nucleus occupy a similar location by chance.

The amount of CO2 removed from the atmosphere due to the operation of four units of Al Barakah nuclear power station online will be:CO2 removed from the atmosphere= (Carbon dioxide emission rate of gas-fired turbines – Carbon dioxide emission rate of a nuclear power plant) × Energy generated by nuclear plants= (0.52 – 0) × (24.5 × 106 × 1000) tonnes= 21.9 million tonnes.

a) Currently connected Al Barakah nuclear power units will contribute 24.5 million MWh annually to the national grid.

b) Gas saved due to the operation of the first two nuclear reactors is 12.8 million m3.

c) The amount of CO2 that will be removed from the atmosphere as a result of bringing the four units of Al Barakah nuclear power station online is 21.9 million tonnes

.Explanation:

a) How much of annual energy will the currently connected Al Barakah nuclear power units contribute to the national grid?

The capacity of the first nuclear power plant is 1400 MW and it is now online. There are two units of 1400 MW each, and one is already online. Therefore, total capacity of the connected nuclear generated power is 2800 MW. The annual energy will be:Annual energy = Connected nuclear generated power × hours in a year= 2800 MW × 8760 hrs= 24.5 million MWhb) Assume that gas turbines consume 0.21 m3 of equivalent natural gas for every 1kWh of electricity produced, how much of gas (in m3) will be saved due to the operation of the first two nuclear reactors (units)?The energy generated by the first two nuclear reactors in a year is 24.5 million MWh. To generate the same amount of energy using gas turbines, the amount of gas required is:Energy generated by gas turbines = Energy generated by nuclear plants= 24.5 million MWhThis amount of energy will be generated by the following amount of gas:Energy generated by gas turbines = Amount of gas × 0.21 m3/kWh= Amount of gas = Energy generated by gas turbines / 0.21 m3/kWh= 24.5 million MWh / 0.21 m3/kWh= 11,761 million m3Therefore, the gas saved due to the operation of the first two nuclear reactors is:Gas saved = Gas required to generate the same amount of energy by gas turbines – Amount of gas required by nuclear reactors= 11,761 million m3 – 0= 11,761 million m3c) How many tonnes of CO2 will be removed from the atmosphere as a result of bringing the four units of Al Barakah nuclear power station online?The carbon dioxide emission rate of a gas-fired turbine is 0.52 kg CO2/kWh, and the carbon dioxide emission rate of a nuclear power plant is 0.00 kg CO2/kWh. Therefore, the amount of CO2 removed from the atmosphere due to the operation of four units of Al Barakah nuclear power station online will be:CO2 removed from the atmosphere= (Carbon dioxide emission rate of gas-fired turbines – Carbon dioxide emission rate of a nuclear power plant) × Energy generated by nuclear plants= (0.52 – 0) × (24.5 × 106 × 1000) tonnes= 21.9 million tonnes.

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Answer:

p =  17500 kg*m/s

Explanation:

p = mv

p = 35.0 kg * 500.0 m/s = 17500 kg*m/s

The momentum of a 35.0 kg cannonball fired from a cannon with a velocity of 500.0 m/s will be equal to 17500 \(\dfrac{kg.m}{s}\)

When any body which is having a mass and is in the motion carry momentum with it.

The formula for finding the momentum of any body is given by

\(Momentum = Mass\times Velocity\)

Given that-

\(Mass = 35 kg\)

\(Velocity = 500\)  \(\dfrac{m}{s}\)

\(Momentum = 35\times500\)

\(momentum= 17500 \dfrac{kg.m}{s}\)

Hence The momentum of a 35.0 kg cannonball fired from a cannon with a velocity of 500.0 m/s will be equal to 17500 \(\dfrac{kg.m}{s}\)

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Answer:

Explanation:

I think its all of the above

have a good day :)

The mass of 40K in a person is m0 * exp(- (ln(2) / 1.277 × 10^9 years) * (6.022 × 10^23 mol^-1) * (4130 Bq) * t)

To calculate the mass of 40K in a person that would have a decay rate of 4130 Bq (becquerels), we need to use the concept of radioactive decay and the relationship between activity, decay constant, and the number of radioactive nuclei.

The activity (A) of a radioactive substance is defined as the number of decays per unit time and is measured in Bq. The decay constant (λ) is a characteristic constant for each radioactive substance and represents the probability of decay per unit time.

The decay rate (dN/dt) can be expressed as the product of the activity (A) and the number of radioactive nuclei (N):

dN/dt = -λN

where the negative sign indicates the decay of radioactive nuclei over time.

The relationship between the number of radioactive nuclei (N), the mass (m), and Avogadro's number (N_A) can be given by:

N = (m/M) * N_A

where M is the molar mass of the radioactive substance.

To find the mass of 40K in a person that would have a decay rate of 4130 Bq, we can rearrange the equation as follows:

dN/dt = -λ * (m/M) * N_A

Since the number of radioactive nuclei is directly proportional to the mass, we can rewrite the equation as:

dm/dt = -λ * (m/M) * N_A

Now, we need to find the relationship between the decay constant (λ) and the half-life (t_1/2). The decay constant can be calculated using the equation:

λ = ln(2) / t_1/2

Substituting this expression into the previous equation, we have:

dm/dt = - (ln(2) / t_1/2) * (m/M) * N_A

Integrating both sides of the equation over time, we get:

∫ dm/m = - (ln(2) / t_1/2) * N_A * ∫ dt

Solving the integral, we have:

ln(m) = - (ln(2) / t_1/2) * N_A * t + C

where C is the constant of integration.

To solve for the constant of integration, we can use the initial condition that at time t=0, the mass of 40K is known to be m0. Substituting this into the equation, we get:

ln(m0) = C

Substituting C back into the equation, we have:

ln(m) = - (ln(2) / t_1/2) * N_A * t + ln(m0)

Taking the exponential of both sides, we obtain:

m = m0 * exp(- (ln(2) / t_1/2) * N_A * t)

Now, we can substitute the given values into the equation. The half-life of 40K is given as 1.277 × 10^9 years, and the decay rate is 4130 Bq.

Using Avogadro's number (N_A = 6.022 × 10^23 mol^-1) and the molar mass of potassium (M = 39.10 g/mol), we can calculate the mass of 40K in a person:

m = m0 * exp(- (ln(2) / t_1/2) * N_A * t)

= m0 * exp(- (ln(2) / 1.277 × 10^9 years) * (6.022 × 10^23 mol^-1) * (4130 Bq) * t)

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Answer:

(1) - v(t) = 9.18t - 1.12

(2) - a(t) = 9.18 m/s²

Explanation:

We are given the position function, y(t) = 4.59t² - 1.12t + 0.03. We are asked to determine the following:

\(\hrulefill\)

To find the velocity function simply take the derivative of the position function.

y'(t) = v(t) = 9.18t - 1.12

Using the graph we can find the object's initial velocity by pugging in t=0.220 s.

=>  v(0.220) = 9.18(0.220) - 1.12

=>  v(0.220) = 0.8996 m/s \(\hrulefill\)

To find the acceleration function either take two derivatives of the position function or one of the velocity function.

y''(t) = v'(t) = a(t) = 9.18 m/s²

Thus, the object is speeding up with constant acceleration.

The following relationship is true T1 < T2.

An ideal gas is defined as a gas in which all collisions between atoms or molecules are perfectly elastic and no intermolecular attractive forces occur. It can be thought of as a collection of perfectly rigid spheres that collide but do not interact.

The volume of gas particles is negligible. Gas particles are the same size and have no intermolecular forces as other gas particles. Gas particles move randomly according to Newton's laws of motion. Gas particles undergo perfectly elastic collisions without losing energy. This is the relationship between four variables and describes the state of the gas.

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The therapeutic method of free association is a form of psychoanalytic therapy that involves patients spontaneously expressing their thoughts, feelings, and impulses without censorship or guidance.

The therapeutic method of free association was developed by Sigmund Freud, the founder of psychoanalysis, to help patients uncover unconscious thoughts and emotions that may be causing psychological distress or contributing to problematic behaviors and relationships. Free association is a technique that allows patients to express themselves spontaneously, without censoring or filtering their thoughts or feelings. During therapy, patients are encouraged to report whatever comes to mind, whether it is an image, memory, feeling, or thought. The therapist listens attentively and may prompt the patient to explore a particular topic or issue if it seems relevant to the patient's symptoms or goals. The goal of free association is to access the unconscious mind, which is believed to contain repressed or forgotten memories, wishes, and conflicts that may be influencing the patient's current thoughts, feelings, and behaviors.

By exploring and processing these hidden contents of the mind, patients can gain insight into their unconscious motivations and resolve conflicts that may be causing distress or interfering with their ability to function effectively in the world. Free association is a long-term approach to therapy that requires a significant commitment of time and effort on the part of the patient. Therapy sessions may occur multiple times per week, and treatment may last for several years. However, free association is not appropriate for everyone, and some people may find it difficult to engage with the process. Additionally, some critics argue that free association lacks scientific support and is based on unproven assumptions about the unconscious mind and human behavior.

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Answer:

I don't know if I can help you with that

The mass of the mud sitting above a 4.2 m2 area of the valley floor is approximately 9,481.59 kilograms.

The first step is to calculate the volume of the mud that slipped into the valley. The volume can be determined by multiplying the dimensions of the section that slipped: 1.5 km (width) × 0.61 km (height) × 0.63 m (depth) = 0.57435 cubic kilometers. Next, we need to convert the volume to cubic meters since the mass of the mud is given in kilograms per cubic meter.

There are 1,000,000 cubic meters in one cubic kilometer, so the volume in cubic meters is 0.57435 × 1,000,000 = 574,350 cubic meters. To find the mass of the mud sitting above a 4.2 m2 area of the valley floor, we need to calculate the mass per unit area. This can be done by dividing the total mass of the mud by the total surface area of the valley.

The surface area of the valley is 0.34 km × 0.34 km = 0.1156 square kilometers. Converting this to square meters, we get 0.1156 × 1,000,000 = 115,600 square meters. Finally, we divide the total mass of the mud by the surface area to find the mass per unit area: 574,350 cubic meters × 1900 kg/cubic meter ÷ 115,600 square meters = 9,481.59 kg/m2.

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Answer:

Force = 2802.8 Newton

Explanation:

Given the following data;

Mass = 130 lbs

But, 2.2 lbs = 1.0 kg

130 lbs to kg = 130 * 2.2 = 286 kg

Acceleration due to gravity = 9.8m/s²

To find the force in Newton;

Force = mass * acceleration due to gravity

Force = 286 * 9.8

Force = 2802.8 Newton

Answer:

Electrostatics is a branch of physics that studies electric charges at rest. Since classical physics, it has been known that some materials, such as amber, attract lightweight particles after rubbing. The Greek word for amber, or electron, was thus the source of the word 'electricity'.

Answering I have no idea bud but I really need answers

Explanation:

I’m sorry

Answer:

The Gravitational force is the answer.

Smallest momentum: Object B, Object A, Object C.

Largest momentum: Object C, Object A, Object B.

Momentum is defined as the product of mass and velocity, p = mv. Comparing the three objects, we can calculate their momentum as follows,

Object A: p = mv

Object B: p = (m/2) x (4u) = 2mu

Object C: p = (3m) x (v/3) = mv

From these equations, we can see that Object B has the smallest momentum since it has the lowest mass and speed. Object A has a larger momentum than Object B but smaller than Object C, which has the largest momentum due to its large mass. Therefore, the correct ranking from smallest to largest momentum is Object B, Object A, Object C.

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