Use the drop-down menus to explain how noise cancellation works. Waves with similar are created to interfere with unwanted sound waves. The of one wave overlap with the troughs of the other wave, causing the two waves to cancel out each other.

Answer: 5184 kJ

Explanation:

Given

Area of cross-section [tex]A=200\ cm^2[/tex]

thickness of slab [tex]t=5\ cm[/tex]

thermal conductivity [tex]k=0.5\ W/m-K[/tex]

temperature difference [tex]\Delta T=150\ K[/tex]

Heat flow is given by

[tex]\Rightarrow Q=kA\dfrac{dT}{dx}\\\Rightarrow Q=0.5\times 200\times \dfrac{150}{5}\times 10^{-2}\\\Rightarrow Q=30\ W\ or\ 30\ J/s[/tex]

for 2 days time period, it is

[tex]t=2\ days\ or\ 2\times 24\times 60\times 60\ s\\t=1,72,800\ s[/tex]

Heat flow in 2 days

[tex]Q=30\times 172800=5184000=5184\ kJ[/tex]

Explanation:

Newton's second law:

F = ma

42 N = m (1.8 m/s²)

m = 23 kg

An object accelerating at 1.8 m/s² to which an unbalanced force of 42 Newtons has been applied, mass of object is  23 kg.

A force is an effect that can alter an object's motion according to physics. An object with mass can change its velocity, or accelerate, as a result of a force. An obvious way to describe force is as a push or a pull. A force is a vector quantity since it has both magnitude and direction.

Given in the question  the mass of an object accelerating at 1.8 m/s² to which an unbalanced force of 42 Newtons has been applied is ,

Using Newton's second law force is given as

F = ma

42 N = m (1.8 m/s²)

m = 23 kg

An object accelerating at 1.8 m/s² to which an unbalanced force of 42 Newtons has been applied, mass of object is  23 kg.

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Answer:

Terms in this set (25) Mendel crossed true-breeding plants having yellow peas with plants having green peas. The resulting plant had all yellow peas. An F1 cross resulted in 3/4ths of the plants having yellow peas and 1/4th of the plants having green peas.

Explanation:

Answer:

A person that weighs 63.7 kg weighs 63.7 kg

Explanation:

Too complicated to explain.

Answer: 140.4 pounds

Explanation:

Answer:

Electrons are negatively charged and are deflected on a curving path towards the positive plate. Neutrons have no charge, and continue on in a straight line.

The particle will be deflected toward the positive plate as it enters the electric field is an electron.

The electric field is the region of space in which the particle experiences the electrostatic force.

As the plate is positive, so to deflect any particle towards it, the particle must be negatively charged.

An electron is a particle that has a negative charge.

The particle will be deflected toward the positive plate as it enters the electric field.

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Answer:

It would spin ifintely

Explanation:

Answer:

To be honest, if you’re preparing for your IGCSEs, you should really know how to use a ruler, but I’ll explain it anyway.

A ruler is a flat object, usually rectangular, with markings along one or more of its straight edges.

These markings show us how long something is. It can only be used to measure other straight lines. If you want to measure something, hold the ruler against it, aligning the start of the edge of the object with the 0 on the ruler, and read off the ruler how long it is.

Explanation:

The volume of the cylinder can be found by putting the value of length and height in the formula πr²l. Length can be measured by using a ruler.

An object's volume is a measurement of the amount of space it occupies in three dimensions. This indicates that an elephant's volume is more than a mosquito's volume.

Since gases fill their containers to the brim, their volume is equal to the container's internal capacity. Liquids are routinely measured using containers with specified internal shapes or ones with predetermined volumes.

A ruler is a flat device with marks along one or more of its straight edges. It is typically rectangular.

The length of anything is indicated by these markers. Only other straight lines can be measured using it. If you want to measure something, place the ruler against it, line up the object's beginning edge with the number 0, and then read the length of the ruler.

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Answer:

Velocity

Explanation:

search it up on yt lol

Explanation:

Answer:

The minimum heat required is 171626 joules.  

Explanation:

By First Law of Thermodynamics, the amount of heat ([tex]Q[/tex]), in joules, is equal to the change in internal energy of water. The minimum heat required is the sensible heat necessary to heat up the water. That is:

[tex]Q = \rho\cdot V \cdot c\cdot \Delta T[/tex] (1)

Where:

[tex]\rho[/tex] - Density of water, in kilograms per cubic meter.

[tex]V[/tex] - Volume of water, in cubic meters.

[tex]c[/tex] - Specific heat of water, in joules per kilogram-degree Celsius.

[tex]\Delta T[/tex] - Change in temperature, in degrees Celsius.

If we know that [tex]\rho = 1000\,\frac{kg}{m^{3}}[/tex], [tex]V = 5\times 10^{-4}\,m^{3}[/tex], [tex]c = 4186\,\frac{J}{kg\cdot ^{\circ}C}[/tex] and [tex]\Delta T = 82\,^{\circ}C[/tex], then the minimum heat required is:

[tex]Q = 171626\,J[/tex]

The minimum heat required is 171626 joules.  

Answer:

2700g/L

Explanation:

D=m/v

40.5g/0.015L

Answers:

1) A process that occurs when an object or a particle moves, referred to as kinetic energy

2) A potential energy is a stored amount of energy that changes depending on the relative positions.

3) Potential Energy is the energy stored in an object due to its position. Kinetic Energy is the energy of motion in a moving object.

4)

  a) C and B

  b) A

  c) From B to A or from C to A

  d) From A to B or from A to C

[tex]\huge\mathfrak\green{answer}[/tex]

1) Kinetic energy of an object is the measure of the work an object can do by the virtue of its motion.

For Example : A river flowing at a certain speed comprises kinetic energy as water has certain velocity and mass.

2) Potential energy is the energy held by an object because of its position relative to other objects, stresses within itself, its electric charge, or other factors.

For Example : A child at the top of the slide

3) KINETIC ENERGY

POTENTIAL ENERGY

(make sure to draw a table and write them separately)

4)

a) C and B

b) A

c) B to A then C to A

d) A to B then A to C

(mark me brainliest please I need 1 more :))

[tex]\large\sf\green{thank \: you}[/tex]

Answer:

Your weight is the combination of all the large-scale, long-term forces on your body. While the earth's gravity is by far the strongest large-scale force, it is not the only one. What you experience as "something pulling you down" is actually the total of all the forces and not just gravity. The four dominant large-scale,

Explanation:

Answer:

Experiments have shown that a magnetic Just sitting next to a wire produced no current flow through that wire. However, If the magnet is brought close to the coil of wire or a relative motion is established between the magnet and the wire then a current is induced in the wire. The closer the magnet moves, the more the Induced current.

Explanation:

A magnet sitting next to a wire would not induce a current in the wire because the magnetic lines of force of the magnet are not in relative motion to the wire.

If you move a magnet close to a  wire, the electrons will move thus generating current.  

Answer:

understand

Explanation:

hiiiiiiiiiiiiiiiiiiii

Answer:

The space around a charge or a pole in which a force is experienced is called a magnetic field. And a cluster of aligned magnetic atoms is a magnetic domain. When the clustered regions are aligned with one another, they form a magnet

Answer:

Kindly check explanation

Explanation:

Motion of an object could be explainwd as how a body changes position over time. Some of the proven facts about motion are stated by Sor Isaac Newton, named the Laws of motion :

1. A body will continue on it's state of rest or uniform motion in a straight line unless acted upon by a force to make it act otherwise.

2.) The second law explains that the force acting in an object is a product of the mass and acceleration.

Force = mass * acceleration due to gravity

3.) To every action, there is an equal and opposite reaction.

That is ; applied force in the positive direction on an object, yield an equal amount of force in the opposite direction.

Answer:

Explanation:

Remark

He's pulled upwards by the parachute. The formula is given below. Details are found   searching for terminal velocity.

[tex]V_t=\sqrt\frac{2mg}{\rho A C_d}[/tex]

Whatever that calculation turns out to be, a person has to be going a whole lot slower before he can safely hit the ground. The parachute is designed so that the person will be slowed very quickly to a safe velocity so when he hits the ground the impulse will not be as great as it could be. The force that the parachute delivers acts upward and opposes the force of gravity which is a downward force.

Answer:

one billion to ten billion joules.

Explanation:

To keep a 100-watt light bulb going for one second, one hundred joules of energy will be used.

Answer:

In 3 lightning bolts, there is approximately 1 billion to ten billion joules.

Explanation:

Answer: white shirt-reflect

top hat- reflect

elepahnt- i think absorb im quite sure

Explanation:

Reflection means that they are thrown back from a surface; absorption means that they are incorporated by a surface and transformed into heat energy. Different surfaces reflect and absorb differently. Different shirts with different colors will absorb light of different wavelength. Black shirt will absorb all colors of light while white shirt will reflect all colors of light. thats why on a hot day you wouldnt want to wear a black t shirt.

Answer:

A stationary charge produces only electric field whereas a moving charge produces both electric as well as magnetic fields.

Answer:

Force = 3.06 Newton.

Explanation:

Given the following data;

Weight = 10N

Acceleration = 3m/s²

To find the force required;

First of all, we would determine the mass of the body.

Weight = mass * acceleration due to gravity

We know that acceleration due to gravity is equal to 9.8m/s².

10 = mass * 9.8

Mass = 10/9.8

Mass = 1.02 kg

Now, we can find the force required by using the formula below;

Force = mass * acceleration

Force = 1.02 * 3

Force = 3.06 Newton.

Answer:

when u find out pls lmk! i have the same question and I've been stuck for a while lol

Answer:  If there are no air resistance the hailstones would hit the earth at velocities near 350 m/s and melt before they hit the ground.

Explanation: Hope This Helps

Answer:

i think that it is a computer model

Answer:

The answer is B.

Explanation:

Computer Model

Answer:

Note that the number of atoms of each element is the same on each side of the reaction: four iron atoms and six oxygen atoms.

Explanation:

Answer:

10, 4 iron and 6 O

Explanation: