PLEASE SHOW STEPS!

You heat a 0.45 kg sample of metal to a temperature of
80 °C then quickly transfer it into a beaker that contains 0.70 kg of water at 15 °C; the specific heat capacity of water is 4 200 J/kg·°C. The highest temperature of the sample plus the water is 21 °C. What is the heat capacity of the sample of metal?

Answer: adding green, red, and blue light produces white light

Explanation:the process of color subtraction is a useful way of predicting the color appearance of an object, if the color of the light and pigments are known. If you use the complementary color scheme, the colors of light that will be absorbed by a given material are determined.

Final answer:

The phrase "color by subtraction of light" describes the process where color is created by absorbing certain wavelengths while reflecting others, used in subtractive color theory applications like printing and photography.

Explanation:

Subtractive Color Theory

The phrase "color by subtraction of light" refers to the subtractive color theory, which is a method of creating color by filtering out certain wavelengths of light. This concept is commonly used in color printing and photography, where colors are produced by absorbing parts of the light spectrum and reflecting the rest. For example, when blue paint is applied to a canvas, it absorbs all colors except for blue, which is reflected back to the eyes of the viewer.

In subtractive color mixing, the primary colors are red, yellow, and blue. When these are mixed, they produce the secondary colors of green, orange, and purple. This is the opposite of additive color theory, where colors are created by mixing different lights (red, green, and blue) and the combination of all creates white light. The sensation of color in photographic transparencies is achieved by the substrate absorbing specific wavelengths of light — for instance, to display blue, the material must absorb yellow light.

Subtractive color theory is essential in the development of the CMYK color model, which uses cyan, magenta, and yellow as primary colors, and is central to processes such as full-color printing and other applications where pigmentation and light reflection play a critical role in color creation.

Answer:

Answer:

Starting from the beginning.

There is a radio signal that is received by the radio.

The radio interprets the signal and produces a current in response to it.

That current goes to a membrane that oscillates producing sound, the oscillation of the membrane is the first mechanical energy event here.

These oscillations can travel in material mediums, for example, the air. Then there is a production of waves (soundwaves) that travel in the air (second event).

Those waves now hit the wall that separates you and your neighbor, as the wall is made of a material, the soundwaves can travel through it, but they will be dispersed (a part of the waves rebounds on the wall, and another part is dissipated as the wave travels through the wall), there is also a transmitted part of the wave, that is now in your house. (this change of medium will be the third event). Now only the lower frequencies survive, this is why the sound is "muffled".

Those remaining frequencies now travel in your house, and when they reach your ear, your ear sends a signal to your brain and your brain interprets them as sound. The wave interacting with your ear will be the fourth and last mechanical energy event.

Explanation:

Final answer:

The sequence of mechanical energy that allows you to hear a muffled radio sound includes the radio's speaker vibrations creating sound waves, which then cause a house's walls to vibrate and transfer the sound externally.

Explanation:

The sequence of mechanical energy events that allow you to hear the muffled sound of a radio from inside your neighbor's closed house starts with the radio producing sound waves. These sound waves are created by the vibration of the radio's speakers, which cause the air molecules around them to vibrate as well. The vibrating air molecules then transfer the energy to the walls of the house, which vibrate slightly and in turn, transfer some of this vibrational energy back to the air on the outside of the house. Despite being reduced in energy, these vibrations can still create sound waves in the outside air that may reach your ears as a muffled sound.

During the process, energy is conserved as it changes forms, from the electrical energy used to power the radio turning into sound energy, which is then transformed into mechanical energy as the house's walls and structure vibrate. Ultimately, when these vibrations reach your ears, tiny bones in your inner ear vibrate, translating these mechanical vibrations into electrical signals that your brain interprets as sound.

Answer: Decomposition uses solar energy because for hydrogen and oxygen.

Explanation:

Best description a direct current is Charge that moves in a single direction.

Charged material experiences a force when it is exposed to an electromagnetic field due to the physical characteristic of electric charge. You might have a positive or negative electric charge. Unlike charges attract one another while like charges repel one another.

A positively charged nucleus and one or more negatively charged particles known as electrons make up an atom.

Best description a direct current is Charge that moves in a single direction.

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Answer:

C. Charge that moves in a single direction

Explanation:

Answer:

Explanation:  We have seasons because Earth's axis – the imaginary line that goes through the Earth and around which the Earth spins — is tilted. It's tilted about 23.5 degrees relative to our plane of orbit (the ecliptic) around the Sun. As we orbit our Sun, our axis always points to the same fixed location in space. Our northern axis points almost directly toward Polaris, the North Star.

Answer:

120 mph I don't know for sure but still this came in my mind

Carbon dioxide

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Answer:

B) Periodic Motion

Explanation:

When a pendulum is friction-less, i.e there are no damping forces acting on it, its motion will be periodic, i.e it will bob up and down going from potential energy to kinetic energy and back. Thus, the motion of the pendulum can be best described by the term "period motion", hence choice B.

If however, forces do act on the pendulum, and if they acts as to damp the pendulum, it will oscillate less and less as time goes by, and eventually come to a stop (in the real world this damping force is usually air resistance ). And if the force acts in such a way that it increases the oscillations, the pendulum will swing higher and higher, and the system will go haywire! :)

Final answer:

Groups of stars smaller than galaxies are known as star clusters, including open clusters with younger stars, and are much smaller than galaxies like the Milky Way.

Explanation:

Groups of stars that are smaller than galaxies are known as star clusters. These formations range from hundreds to thousands of stars bound together by gravity. Among star clusters, there are two main types: open clusters and globular clusters. The former consists of younger stars that typically have formed out of the same nebula and can include up to a few thousand stars.

Examples include entities like the Jewel Box. On the larger scale, galaxies like the Milky Way are vast collections of stars, with numbers ranging from a few million to many billions. The Milky Way, which contains all the stars we can see in the night sky, has a diameter of about 100,000 light-years, contrasting with the smaller star clusters.

Answer:

right options are:

A

B

C

D

Answer: lif

Explanation:

lif is the answer i checked it and the person above is one hundred percent wrong. lif is the right answer.

Answer:

because the spoon it is concave

Explanation:

Answer:

compound

Explanation:

A compound is composed of two or more different elements combined together. Water is made up of 2 atoms of hydrogen and one atom of oxygen combined together. Water is therefore made up of two separate elements, which makes it a compound.

Water (H₂O) is a compound made of hydrogen and oxygen in a fixed ratio, while a single atom of oxygen (O) is an element.

Elements consist of only one type of atom, while compounds are made of multiple types of atoms.

Answer: The fundamental frequency of the slinky = 8Hz

An input frequency of 28 Hz will not create a standing wave

Explanation:

Let Fo = fundamental frequency

At third harmonic,

F = 3Fo

If F = 24Hz

24 = 3Fo

Fo = 24/3 = 8Hz

If an input frequency = 28 Hz at 3rd harmonic

Let find the fundamental frequency

28 = 3Fo

Fo = 28/3

Fo = 9.33333Hz

Since Fo isn't a whole number, it can't create a standing wave

Answer:

If they both remain constant they ain't moving, It states that the rate of change of velocity of an object is directly proportional to the force applied and takes place in the direction of the force. It is summarized by the equation

Explanation:

Answer:B

Explanation:

Answer:

b

Explanation:

Because light is not a state of matter

Answer:

80 amperes

Explanation:

Current in the circuit = ?

Voltage in the circuit = 160 Volts

Resistance = 2 Ω

Voltage = Current x Resistance

V = IR

160V = I x 2 Ω

I = 160V / 2 Ω

I = 80 Amperes

Therefore the current in the circuit is 80 amperes :)

The current through the 160V circuit with a resistance is 2Ω is 80 Ampere.

From Ohm's law, the relationship between voltage (V), current (I), and resistance (R) can be expressed as:

V = I × R

Given the parameter:

Voltage V = 160 V

Resistance R = 2 ohms

Current I = ?

Plug the given value into the equation and solve for the current I:

V = I × R

160 = I × 2

I = 160/2

I = 80 Ampere

Therefore, the current I is 80 Ampere.

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Answer:

The answer is D.

Explanation:

There is no gravity in Space so that means that it will decrease your weight but not your mass.

Your mass would remain the same on the Moon or any other celestial body because it is a constant measure of the matter within you. However, your weight would be less on the Moon due to its weaker gravitational pull compared to Earth. The correct answer, therefore, is B - your weight would be less but your mass would remain the same.

When considering the comparison of weight and mass on the Moon versus the Earth, it's important to clarify the difference between the two concepts. Mass is a measure of the amount of matter in an object, and it remains constant regardless of location. On the other hand, weight is the force exerted on an object due to gravity and varies depending on the gravitational pull of the celestial body you're on.

The acceleration due to gravity on the Moon is approximately 1.625 m/s², significantly less than the Earth's gravitational acceleration of 9.80 m/s². So, if you were to move from Earth to the Moon, your mass would remain the same because the quantity of matter you consist of does not change. However, because the Moon's gravity is weaker, you would weigh less. This decrease in weight is attributed to the lower gravitational pull, not to a loss of mass.

The correct answer to the question posed is: B. your weight would be less but your mass would remain the same. This reflects the understanding that while the gravitational force acting on you decreases, the actual matter that you are made of does not change.

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Answer:

A

Explanation:

I think it is Nuclear fission because it can release a large amount of energy.i hope this helps☺️

Answer: Scalar quantity has magnitude but no direction while a vector quantity has both magnitude and direction.

Explanation:

A scalar quantity is a physical quantity that has magnitude but no direction. Examples are

- temperature, measured in Kelvin

- distance, measured in metres

- speed, measured in metres per second

Vector quantity, on the other hand, is a physical quantity that have both magnitude and direction. Examples are:

- velocity, measured in metres per second (m/s)

- force, measured in newton

- displacement, measured in metres

Answer:

Explanation:

he dry adiabatic rate is the rate at which dry air changes its temperature as a result of expansion or compression. The dry adiabatic rate is 1.0o C/100 meters. Air rises and cools at the dry adiabatic rate up to the level of condensation where dew point temperature is reached.

The dry adiabatic rate is the rate of temperature change in unsaturated air as it ascends or descends in the atmosphere, approximately 1 degree Celsius per 100 meters. This rate applies until the air becomes saturated, after which it cools at the wet adiabatic rate.

The dry adiabatic rate, often used in meteorology, refers to the rate at which a parcel of dry or unsaturated air changes temperature as it moves vertically in the atmosphere. This rate is approximately 1 degree Celsius per 100 meters (or 10 degrees Celsius per kilometer) of ascent or descent. However, this rate holds true only for dry or unsaturated air; once air becomes saturated, it cools at a different rate known as the wet adiabatic rate.

To illustrate, imagine a balloon filled with air that's heated and starts to rise. As the balloon ascends, the pressure around it decreases. This causes the air in the balloon to expand and cool. This cooling process continues at the dry adiabatic rate until the air in the balloon becomes saturated.

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Answer:

4.Gravity

5.compressible

6.shear force

Explanation:

Number of wavelengths

-----------------------------------  :  ⇒ Frequency

              Time

Distance traveled

--------------------------  :  ⇒ Speed

          Time

Some features of sound wave that describes the motion of the sound wave include wavelength, speed and frequency.

There are several features of sound wave that decribes the motion of the sound wave and some of the features include;

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Answer:

v = 315m/s

Explanation:

a = v - u /t

a = acceleration 60m/s2

v = final speed

u = initial speed 15m/s

t = time 5 secs

Therefore

60 = v - 15 /5

Cross multiply

v - 15 = 60 x 5

v - 15 = 300

Add 15 to both sides

v - 15 + 15 = 300 + 15

v = 315m/s

Answer:

1. 23°

2. 65°

Explanation:

1.

The law of reflection provides that for the same medium, the angle of reflection equals the angle of incidence.

Similarly, here, angle of incidence and reflection will be 46°÷2=23°

2. Since the normal, angles of reflection and incidence lie on the same plane and also the angles of reflection and incidence are equal then the angle between the plane of the mirror and the reflected beam will be given by 90-25=65°

Final answer:

To address the two light reflection questions: 1.) The angle of incidence, when the angle between incident and reflected beams is 46 degrees, is 23 degrees. 2.) When a light ray reflects from a mirror with an angle of incidence of 25 degrees, the angle between the plane of the mirror and the reflected beam is 65 degrees.

Explanation:

The question involves understanding the law of reflection, which states that the angle of incidence is equal to the angle of reflection. This law is fundamental in analyzing how light interacts with reflective surfaces such as mirrors.

1.) If the angle between the incident and reflected beams is 46 degrees, then considering the law of reflection, we must recognize that the angle of incidence is half the angle between the beams because the incident ray and the reflected ray make equal angles with the normal to the mirror surface. Therefore, the angle of incidence is 46 degrees / 2, resulting in an angle of incidence of 23 degrees.

2.) Given an angle of incidence of 25 degrees, the reflected beam will also be at an angle of 25 degrees with the normal (due to the law of reflection). The angle between the plane of the mirror and the reflected beam, which is asked for, is not the same as the angle of reflection. In this case, since angles are measured from the normal, the angle between the mirror plane and the reflected beam is 90 - 25 = 65 degrees.

Answer:

B.) Releases heat or light

Explanation:

Answer:

C.

Explanation:

(Coronita virus)

17

Answer:

i dont know

Explanation: