Which three characteristics do mechanical waves and electrocmagnetic
waves share?
O A. The waves and their energy can travel through empty space.
B. The waves transfer energy from its source.
O C. The waves begin with a disturbance.
O D. The waves and their energy move outward from the source.

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It gets this name because it does not melt into a liquid when heated; instead, it changes directly into a gas (a process known as sublimation).

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Answer:

Kinetic energy is the energy due to motion. Potential energy is energy stored in matter. The joule (J) is the SI unit of energy and equals (kg×m2s2) ( kg × m 2 s 2 ) .

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Answer:

Force

Motion

position

Explanation:

Deanna's niece loves to swing at the local playground, so Deanna takes her and pushes her on the swing. Deanna must use force to exert a motion that causes the swing to change position.

Answer:

When the temperature of an object increases, the average kinetic energy of its particles increases. When the average kinetic energy of its particles increases, the object's thermal energy increases. Therefore, the thermal energy of an object increases as its temperature increases.

Explanation:

Answer:

what y'all teachers be on

Answer:

Explanation:

Possible causes for overcurrent include short circuits, excessive load, incorrect design, an arc fault, or a ground fault. Fuses, circuit breakers, and current limiters are commonly used overcurrent protection (OCP) mechanisms to control the risks

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Answer:

C. 4.0 J

Explanation:

Work is equal to the change in kinetic energy or kinetic energy final - kinetic energy initial. 1/2 mv^2 is the equation for kinetic energy. SInce the mass is the same, you don't have to include it when solving. 1/2 times 1^2 = 1/2. 1/2 times 3^2 = 4.5. 4.5 - 0.5 = 4 J

Answer:

ϟ [tex] \huge{ \boxed{ \purple{ \text{Simple \: Machine}}}}[/tex]

⤥ We use different types of devices in our life to make our work easier. A spade is used to dig , a broom is used to sweep , a hammer is used to pass a nail on the wall and a plank is used to drag a load up to a certain height. All these simple things or devices , which are used in our daily life are called simple machines. Such simple machines do not do our work themselves but we have to use force on them to work with them. Thus , Simple machines are those tools or devices which make our work easier and convenient to do in the direction of force.

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Explanation:

a simple machine is a device having simple structure which makes our work is a faster and more convenient.

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Answer:

Increase friction

Explanation:

The others would make the object move faster

Answer:

The Potential Energy of the Swing is Changing in to Kinetic Energy when is start moving.

Explanation:

When the Swing is pull at its extreme point then it has maximum potential energy. Because the formula of potential energy is:

             P.E. = (1/2)k*x^2

Here x shows the body displacement from the mean (Equilibrium) position. Since at maximum position the displacement is maximum therefore the P.E. is maximum at the extreme point.

When the Swing is released and start moving from extreme position to mean its P.E. is changing into Kinetic Energy. Because with the movement towards the mean position body acquire more speed and that speed increases its velocity. Since Kinetic Energy is given as:

            K.E. = (1/2) m*v^2

Therefore with the increase in velocity kinetic energy increases.

But when body again moving towards the extreme position, its kinetic energy again changes into P.E with the same reason as I discussed in the above paragraph.

Some of the energy is also changes in to heat in order to overcome air resistance.

Explanation:

Because they evolved rapidly, and moulted like other arthropods,trilobites serve as excellent index fossils, enabling geologists to date the age of the rock in which they are found

Answer:

6 m/s^2

Explanation:

Explanation:

Mass = m

Velocity = v

If Mass is increased 4 times = 4m

New velocity = 2v

Kinetic Energy

[tex] \frac{1}{2}m {v}^{2} [/tex]

So it will be 1/2 × 4m × 2v × 2v

[tex]8m {v}^{2} [/tex]

so Kinetic Energy will increase 4 times

Answer:

Heat refers to the energy transferred from a hotter object to a cooler one. Heat is transferred in three ways: radiation, conduction, and convection. ... The direct transfer of heat from one substance to another substance that it is touching is called conduction.

Explanation:

Answer:

250 m/s

Explanation:

Answer:

250m/s

Explanation:

Frequency = velocity/wavelength

Then rearrange,

Velocity = frequency x wavelength

Velocity = 500 x 9.5 = 250m/s

Answer:

The approximate velocity the rocket must have to stop the asteroid completely after the collision is;

C. -324 m/s

Explanation:

The parameters of the asteroid and the rocket are;

The mass of the asteroid, m₁ = 11,000 kg

The initial velocity with which the asteroid is approaching Earth, v₁ = 50 m/s

The mass of the rocket, m₂ = 1700 kg

The initial velocity of the rocket = v₂

The final velocity of the combined asteroid and rocket after the collision, v₃ = 0 m/s

By the law of conservation of linear momentum, we have;

The total initial momentum = The total final momentum

m₁·v₁ + m₂·v₂ = (m₁ + m₂)·v₃

Substituting the known values, we get;

11,000 kg × 50 m/s + 1,700 kg × v₂ = (11,000 kg + 1,700 kg) × 0 m/s

11,000 kg × 50 m/s + 1,700 kg × v₂ = 0

∴ 1,700 kg × v₂ = -11,000 kg × 50 m/s

v₂ = (-11,000 kg × 50 m/s)/(1,700 kg) = -323.529412 m/s ≈ -324 m/s

The approximate initial velocity the jet must have to completely stop the asteroid after the collision is -324 m/s.

Answer:

potential energy decreases

kinetic energy increases

The term used when heat is transferred from one piece of matter to another until they are of equal temperature is equilibrium so, option C is correct.

Heat is energy that is transmitted from one body to another when temperatures are different. When two bodies of different temperatures are brought together, energy is exchanged, or heat flows, from the hotter body to the colder.

An increase in the temperature of the colder body and a reduction in the temperature of the hotter body is typical, though not always, the results of this energy transfer.

The system (or collection of systems) is said to be in thermal equilibrium when these temperatures equalize and heat no longer flows through them. The absence of substance flowing into or out of the system is another implication of thermal equilibrium.

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Answer:

C. precipitation

Explanation:

if clouds store too much water from evaporation, it will rain which is precipitation

Answer:

the velocity is 1.67 m/s

Explanation:

The computation of the velocity of the arrow/ice combination after the collison is shown below:

Here the law of conservation is applied

[tex]p_i = p_f\\\\m_av_a+m_b+v_b= (m_a + m_b)v[/tex]

Here

[tex]m_a = 2.0 kg\\\\v_a = 10m/s\\\\m_b = 10 kg\\\\v_b = 0[/tex]

Now

[tex]v = \frac{m_av_a+ m_bv_b}{m_a + m_b} \\\\= \frac{(2.0kg) (10 m/s) + 0}{2.0kg + 10.0kg}[/tex]

= 1.67 m/s

hence, the velocity is 1.67 m/s

The change that should arise at the time when an atom undergoes alpha decay is that nucleus loses mass and a new element is produced.

It is the type of radioactive decay where the atomic nucleus should be emitted an alpha particle and due to which it transforms and it should be distinct atomic nucleus.

Therefore we can say that The change that should arise at the time when an atom undergoes alpha decay is that nucleus loses mass and a new element is produced.

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Answer:

can be called kinetic or potential energy

Explanation:

Explanation:

The buoyant force must be greater to float, otherwise it would sink, its like a barrel in water, the more water weight in it the more it sinks, the more air weight the more it rises.

Answer:

9000 J

Explanation:

Answer:

Astronomical location of Mount St. Helen's is 46°12′01″N 122°11′22″O, meaning that such statovolcano is located at middle latitudes. In middle latitudes, troposphere is 17 kilometers high, which is below stratosphere, whose height is 10 kilometers at middle latitudes. Hence, the eruption of Mount St. Helen's in 1980 contiminated troposphere and lower parts of stratosphere due to volcanic ash.

Explanation:

Astronomical location of Mount St. Helen's is 46°12′01″N 122°11′22″O, meaning that such statovolcano is located at middle latitudes. In middle latitudes, troposphere is 17 kilometers high, which is below stratosphere, whose height is 10 kilometers at middle latitudes. Hence, the eruption of Mount St. Helen's in 1980 contiminated troposphere and lower parts of stratosphere due to volcanic ash.

Answer:

Atoms cannot move.

Explanation:

Answer:

In physics we say that work is done on an object when you transfer energy to that object. If one object transfers (gives) energy to a second object, then the first object does work on the second object. Work is the application of a force over a distance. ... Energy can be defined as the capacity for doing work.

Answer:

4761J

Explanation:

Given parameters:

Mass of the ball  = 18kg

Velocity before it hits the water below = 23m/s

Unknown:

Kinetic energy of the ball  = ?

Solution:

Kinetic energy is the energy due to the motion of a body. It is mathematically expressed as:

  Kinetic energy  = [tex]\frac{1}{2}[/tex] m v²  

m is the mass

v is the velocity

 So;

  Kinetic energy  =  [tex]\frac{1}{2}[/tex]  x 18 x 23²  = 4761J