Based on the measurements discussed in part d, the mass of the central black hole is calculated to be about __________ times that of the sun.

Answer:

D the development of an ozone layer

Explanation:

the rest don't relate to the atmosphere

Answer:

it A.

Explanation:

did the test on Edmentum and got it right

According to the research, the correct option is a. The heat generated from the fission reaction is used to boil water, which rises and spins a turbine.

In fusion, two atoms come together to form a larger one, releasing enormous amounts of energy in the process, this is used by generators to produce electricity.

As a result of nuclear fusion, large amounts of heat are generated that are used to produce pressurized steam, which allows mechanical energy to be obtained to start up electric power generators.

Therefore, we can conclude that according to the research, the correct option is a. The heat generated from the fission reaction is used to boil water, which rises and spins a turbine.

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Answer:

Enrique is the correct answer Hope it helps you have a good day

Answer:

enrique is correct

Explanation:

thw earth is bigger than the moon and closer to the sun therefore a shadow is cast from the earth onto the moon as it orbits around the earth

Answer:

b) boy kicking a football

Explanation:

it 's because the ball was at rest but when it was kicked, it starts to more

Explanation:

tan ● = opposite / adjacent

tan 31.5 = 19 / F

0.613 = 19 / F

0.613F = 19

F = 31

sin ● = opposite / hypotenuse

sin 31.5 = 19 / a

0.52 = 19 / a

0.52a = 19

a = 36. 36

Using trigonometry, the base of the triangle is approximately 33.476, and the hypotenuse of the triangle is approximately 38.118.

To find the base and hypotenuse of a right triangle with one angle of 31.5 degrees and a given height of 19:

Here,

Opposite side = height = 19 (given)

Adjacent side = base (unknown)

Hypotenuse = hypotenuse (unknown)

First, let's find the base (adjacent side):

tan(θ) = opposite ÷ adjacent

tan(31.5 degrees) = 19/base

To find the base, we can rearrange the equation:

base = opposite ÷ tan(θ)

base = 19 ÷ tan(31.5 degrees)

Calculating the value:

base ≈ 33.476

So, the base of the triangle is approximately 33.476.

Now, using the Pythagorean theorem, we can write:

hypotenuse² = base² + opposite²

hypotenuse² = (33.476)² + 19²

hypotenuse ≈ 38.118

Therefore, the hypotenuse of the triangle is approximately 38.118.

Thus, base is 33.476, and hypotenuse is 38.118.

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Tension reinforced section is when you have steel reinforcement (rebar) on the tension controlled region where the rebar is used to counteract the lack of tensile strength in concrete. When reinforcement is only present in the tension zone, you have a singly reinforced beam.

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Answer:

The thrust that you feel at the time of firing is one of the real-life example of the conseriation nomentum

The mass of the object attached to the spring is approximately 0.119 kg.

To determine the mass of the attached object using the spring, we can utilize Hooke's Law, which states that the force exerted by a spring is directly proportional to the displacement of the spring from its equilibrium position.

Hooke's Law can be expressed as:

F = k * x

Where:

F is the force exerted by the spring,

k is the spring constant, and

x is the displacement of the spring from its equilibrium position.

The frequency of the spring's motion (f) can be related to the mass (m) and the spring constant (k) using the equation:

f = (1 / (2π)) * √(k / m)

Rearranging this equation, we can solve for the mass:

m = (k / (4π² * f²))

Given:

Spring constant (k) = 3 N/m

Frequency (f) = 0.8 Hz

Substituting these values into the equation, we get:

m = (3 N/m) / (4π² * (0.8 Hz)²)

Calculating this expression:

m ≈ 0.119 kg

Therefore, the mass of the object attached to the spring is approximately 0.119 kg.

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The mass attached to the spring is approximately 0.238 kg.

To find the mass attached to the spring, we can use the formula for the angular frequency (ω) of a mass-spring system:

ω = √(k / m),

where ω is the angular frequency, k is the spring constant, and m is the mass.

Given:

k = 3 N/m (spring constant),

f = 0.8 Hz (frequency).

First, let's convert the frequency from Hz to radians per second (rad/s):

ω = 2πf = 2π(0.8) ≈ 5.03 rad/s.

Now, we can solve the formula for m:

ω = √(k / m),

m = k / ω^2,

m = 3 N/m / (5.03 rad/s)^2.

Calculating the value:

m ≈ 3 N/m / (5.03 rad/s)^2 ≈ 0.238 kg.

Therefore, the mass attached to the spring is approximately 0.238 kg.

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Answer:

The friction of braking heats up the tire and the road. The temperature is so high that it reaches the melting point of the rubber in the tire. The melting rubber is what leaves a mark on the road.

Explanation:

Answer:

the friction of braking heats up the tires and the road. then the temperature gets even hotter to the point where it melts the rubber.

Explanation:

this is my answer so be careful how you copy it, but you've got this guys schools is almost out stay strong an have fun and be safe this summer keep pushing <33.

remember you're loved by many

- Jason Edwards 5/15/23

Answer:

I wants to be a successful person because is wants to stay happy life and I don't wants

The mass of water  is 0.01012 kg.We know that the heat lost by mercury, Q equals heat gained by water, Q'-Q = Q'

Making m" subject of the formula, we have

m" = -[mc(T - T') + m'c'(T - T")]/L

m" = -[270.63 J/ °C(-100 °C) + 210 J/ °C (20 °C)]/2.26 × 10⁶ J/kg

m" = 22863 J/2.26 × 10⁶ J/kg

m" = 0.010116372 kg

m" ≅ 0.01012 kg

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Doppler's effect:

The Doppler effect states that the frequency of sound increases as it source approaches you and it decreases as the source turns away from you.

When the ambulance drives past you, the pitch of the siren is lower. This is due to the fact that the frequency of the wavelength decreases.

A higher pitch means frequency increases and a lower pitch means frequency decreases.

Therefore, the correct answer is option B. decreases

Answer:

Explanation:

hope this helps!

When a wave is modeled by the wave function, there are several parameters that can be derived from the function. These parameters include the amplitude (A), wavelength (λ), wave speed (v), period (T), frequency (f), and wave number (k).

The amplitude (A) of a wave refers to the maximum displacement of the wave from its equilibrium position. It is typically measured in units of meters or some other unit of distance. In the wave function, the amplitude is represented by the variable A.

The wavelength (λ) of a wave is the distance between two consecutive points on the wave that are in phase with each other. It is measured in units of distance, such as meters or centimeters. In the wave function, the wavelength is represented by the variable λ.

The wave speed (v) is the speed at which a wave travels through a medium. It is typically measured in units of meters per second. In the wave function, the wave speed is represented by the variable v.

The period (T) of a wave is the time it takes for one complete cycle of the wave to occur. It is measured in units of time, such as seconds or milliseconds. In the wave function, the period is represented by the variable T.

The frequency (f) of a wave is the number of cycles of the wave that occur per unit of time. It is measured in units of Hertz (Hz), which is equal to one cycle per second. In the wave function, the frequency is represented by the variable f.

Finally, the wave number (k) of a wave is a measure of how quickly the phase of the wave changes with distance. It is typically measured in units of inverse distance, such as meters^-1 or centimeters^-1. In the wave function, the wave number is represented by the variable k.

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Answer:

D

Explanation:

it's all of the above because they all use for gravity

The value of the axle for the two forces that provide 1.3 N m of torque about the axle is 0.5 m.

Given values are:

Torque: 1.3 N m

Force1: 0.8 N

Force2: 1 N

We need to find the value of the axle.

To find the answer, we will use the formula for torque:

τ= r × FTorque

τ is given as 1.3 N m.

Force F1 is given as 0.8 N.

Force F2 is given as 1 N.

The distance between the two forces (axle) is unknown.

Let's denote axle as r.

Now, substitute all the known values into the formula for torque to get:

1.3 N m = r × (0.8 N + 1 N)1.3 N m = r × 1.8 N2F multiplied by r on both sides of the equation and solve for r:

r = (1.3 N m) ÷ (1.8 N) r = 0.722 m

But we have assumed that the distance between the two forces is r.

But the problem states that the distance between the two forces is axle.

Hence we can write, r = axle/2r = axle/2r × 2 = axle

Therefore, axle = 2r = 2(0.722 m) = 1.44 m

Therefore, the value of axle for the two forces that provide 1.3 N m of torque about the axle is 0.5 m.

So, the answer is 0.5 m.

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Answer:

28.28 ms-1

Explanation:

v² = u² + 2as

v² = 20² + 2× 2×100

v² = 800

v = 28.28 ms-1

(a) The frequency of the siren's sound that the fire engine's driver hears reflected from the back of the truck is 2243.9Hz.

(b) The wavelength of the reflected sound waves by the listener is 0.143 m.

We use the principle of Doppler's effect to find the results.

The Doppler's effect is a phenomenon when the source of a wave and an observer move relative to each other, the frequency heard is not the same with the actual frequency.

The equation of the Doppler's effect is

f₀ = (v + v₀) fs / (v + vs)

Where

Note:

There are a truck and a fire engine emitting a siren sound moving in the same direction.

Determine the frequency and the wavelength of the sound waves heard by the listener in the front!

We have the truck is in front of the fire engine. So, the sound source moves closer and the observer moves away. Then, frequency of the sound waves heard by the observer is

f₀ = (v - v₀)/(v - vs) × fs

f₀ = (340 - 19.0)/(340 - 31) × 2160

f₀ = (321/309) × 2160

f₀ = 2243.9 Hz

The wavelength of the sound waves heard by the observer is

λ₀ = (v - v₀) / f₀

λ₀ = (340 - 19) / 2243.9

λ₀ = 321 / 2243.9

λ₀ = 0.1430545

λ₀ = 0.143 m

Hence,

(a) The observer frequency of sound is 2243.9Hz.

(b) The wavelength of the reflected sound waves by the observer is 0.143 m.

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Answer:

current must flow and chemical energy must take place

Answer:

A battery is a device that stores chemical energy and converts it to electrical energy. The chemical reactions in a battery involve the flow of electrons from one material to another, through an external circuit. The flow of electrons provides an electric current that can be used to do work.

It requires 288 joules of heat to raise the temperature of a 225-g lead ball from 15.0°C to 25.0°C.

The formula to calculate the amount of heat, Q required to raise the temperature of an object is:

Q = mcΔT

Where:

Q = the amount of heat (in joules, J)

m = the mass of the object (in kilograms, kg)

c = the specific heat capacity

ΔT = the change in temperature

In this problem, we are given:

m = 225 g = 0.225 kg

ΔT = (25.0°C - 15.0°C) = 10.0°C

c = 128 J/kg*K

plugging in the values

Q = mcΔT

Q = (0.225 kg)(128 J/kg*K)(10.0°C)

Q = 288 J

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According to the statement, The magnetic field 10.0 cm from their midpoint, in their plane is 0.028.

The region around a magnet where the effects of magnetism are perceived is known as the magnetic field. To explain how the force of magnetism is distributed in the area around and inside something magnetic in nature, we use a magnetic field as a tool.

The magnetic field produced by these two current-carrying wires is simply the sum of the magnetic fields produced b each individually. Sin ce these current are antiparallel, their magnetic field partially cancel so that

Bnet = uI/2π ( 1/r1- 1/r2) = [(4π × 10^-7 m/A)(25.0 A)]/2π

=(1/0.10m - 0.0014m) - (1/0.10 + 0.0014m)

=1.4× 10^-6

in comparison, the earth's magnetic field is 0.5 × 10^-4 T so

Bnet/Bearth = 1.4× 10^-6 T/0.5 × 10^-4 T = 0.028

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The complete question is -

A long pair of insulated wires serves to conduct 25.0A of dc current to and from an instrument.

if the wires are of negligible diameter but are 2.8 mm apart, what is the magnetic field 10.0 cm from their midpoint, in their plane

Answer:

3.16kgm/s

Explanation:

Given parameters:

Mass  = 770g

Velocity  = 4.1m/s

Unknown:

Momentum of the car  = ?

Solution:

To solve this problem, we use the equation below:

       Momentum  = mass x velocity

Convert the mass to kg;

        770g to kg = 0.77kg

Now;

    Momentum  = 0.77 x 4.1  = 3.16kgm/s

the splitting of a large nucleus into smaller nuclei is the phrase that describes radioactive decay

The process through which an unstable atomic nucleus loses energy through radiation is known as radioactive decay, also known as nuclear decay, radioactivity, radioactive disintegration, or nuclear disintegration. A substance with unstable nuclei is regarded as radioactive decay

The complete question is

Which phrase describes radioactive decay? (1 point)

the triggering of one reaction by the products of another

the joining of small nuclei into a laroid nucleus

o the splitting of a large nucleus into smaller nuclei

o the spontaneous emission of radiation

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Answer:

The factors in the physical environment that are important to health include harmful substances, such as air pollution or proximity to toxic sites the focus of classic environmental epidemiology access to various health-related resources e.g. healthy or unhealthy foods, recreational resources, medical care.

Answer:

The net strong force on each proton due to all the nucleons is stronger than the net repulsive force.

Explanation:

The strong nuclear force pulls together protons and neutrons in the nucleus. At very small distances only, such as those inside the nucleus, this strong force overcomes the electromagnetic force, and prevents the electrical repulsion of protons from blowing the nucleus apart.

The upward force exerted by the athlete's two arms is 33.9 N

To find the upward force exerted by the athlete's two arms during the press-up exercise, we need to consider the torques acting on the athlete-load system. The torque is the product of force and the perpendicular distance from the point of rotation.

The athlete-load system can be treated as a rigid body with a combined center of mass (CM) located between the athlete's and the load's center of mass. Assuming the system is in static equilibrium, the total torque acting on the system must be zero.

The torques acting on the system are due to the weight of the athlete, the weight of the load, and the upward force exerted by the arms. The weight of the system acts downwards, through the combined center of mass.

The torque due to the weight of the athlete is given by:

70 kg * g * 0.45 m, where g is the acceleration due to gravity (approx. 9.8 m/s^2) and 0.45 m is the perpendicular distance between the CM and the athlete's center of mass.

The torque due to the weight of the load is:

6.0 kg * g * 1.0 m, where 1.0 m is the perpendicular distance between the CL and the CM.

Since the system is in static equilibrium, the sum of the torques due to the upward force exerted by the arms must be equal and opposite to the sum of the torques due to the weights of the system. Therefore, we can write:

Sum of moments about CM:

0.3F - 0.1F = (0.9-0.6)Fg_athlete + (0.9-1.2)Fg_load

Simplifying and substituting the values of Fg_athlete and Fg_load:

0.2F = 6.78 Nm

Solving for F:

F = 33.9 N

Therefore, the upward force exerted by the athlete's two arms is approximately 33.9 N using torque to calculate it.

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Answer:

86.6 meters

Explanation: