Which energy sources can transfer thermal energy to a heat pump? Check all that apply.
air
the ground
water
gas fuel
wood fuel

Answer:

10 m/s

Explanation:

110/11=10

Answer:

10 m/s

Explanation:

110/11=  10 m/s

Answer:

D

Explanation:

I believe the answer is D, but I am not an expert.

Final answer:

No work has been done when Ethan pushes against a stationary wall because, in physics, work requires displacement (transfer of energy), which does not occur here. Therefore option D. In order for work to be done, the wall needs to move is the correct answer.

Explanation:

When Ethan pushes against a brick wall for 5 minutes and the wall does not move, no work has been done despite the feeling of effort. This is because, in physics, the concept of work requires that there be displacement of the object in the direction of the applied force. Since no displacement occurs in this scenario, there is no transfer of energy to the wall, and therefore, no work is performed according to the formula W = Fd (where W is work, F is the force applied, and d is the displacement). The correct answer to why no work has been done is D. In order for work to be done, the wall needs to move. It is crucial to note that this technical definition of work may differ from the everyday usage of the term, which often includes any exertion of effort.

Answer:

A battery

Explanation:

Answer:

B 7200 grams

As

7.2 kg = 7.2 * 1000 gram = 7200 grams

Answer:

Reduce the force

Explanation:

By newtons third law

F=m×a

or

Force =Mass ×Acceleration

In other words

Acceleration=Force/Mass

If the mass drops, to maintain the same acceleration, you need to reduce the force too

ultra high frequency sound

Explanation:

Ultraviolet light, infrared light, and visible light are all examples of electromagnetic waves.

Ultra high frequency sound, on the other hand, is a type of mechanical wave. Sound waves are mechanical waves that require a medium (such as air, water, or solid) to propagate, while electromagnetic waves do not require a medium and can travel through a vacuum (like in space). Ultra high frequency sound is not classified as an electromagnetic wave

Answer:

Explanation:

On Mars, 1 kilogram would be about 3.5 Newtons. So, on Earth, the person would mass 77 kilograms, but weigh 754.6 Newtons. On Mars, the person would still mass 77 kilograms (because mass does not change with gravity), but weigh 269.5 Newtons.

Answer:

3.5 newtons

Explanation:

The weigh of the earths surface is 9.8 newtons so on mars it would be 3.5 newtons

Answer:

Chlorine is a respiratory irritant. The gas irritates the mucus membranes and the liquid burns the skin. As little as 3.5 ppm can be detected as an odor, and 1000 ppm is likely to be fatal after a few deep breaths. In fact, chlorine was used as a war gas in 1915.

Explanation:

Chlorine, with the chemical symbol Cl, should be handled with caution because it can be harmful. Chlorine gas can cause respiratory problems if inhaled, while liquid chlorine can cause skin and eye burns. It can also react to form more hazardous substances.

Chlorine, represented by the chemical symbol Cl, is an element often found in various compounds and used for a broad range of applications, including water treatment and disinfection in pools. However, it's important to handle chlorine with caution because it can be harmful to human health.

As a gas, chlorine is severely irritating and dangerous, causing issues with respiratory function if inhaled. Its liquid form can cause burns on the skin and eyes. Furthermore, chlorine can react with other chemicals, which might lead to the formation of substances more hazardous than the original chlorine.

This is why proper training, correct handling techniques, and safety measures should always be implemented when dealing with chlorine to minimize risks

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Answer:

C, a pulley! A pulley is made of a wheel and rope and in the case of the flagpole, it uses the pulley to raise the flag by pulling the rope.

Explanation:

Image? there is not image in there so I wouldn't be able to answer it properly...

Riding river rapids uses the kinetic energy of water to propel a kayak, while hydroelectric systems control and convert this energy into electricity.

How Energy is Used to Ride the River's Rapids:

When riding the river's rapids, a person uses kinetic energy inherent in the flowing water. The experience can be thrilling, as one navigates through the rushing white water in a kayak or other vessel. The power of a river's flow is a result of its ability to convert mechanical (potential) energy into thermal energy and hydroelectric power. In the case of rapids, the conversion of potential energy into kinetic energy creates the movement and force that propel the kayak downhill, offering the energy needed for the ride.

Similarly, hydroelectric systems like run-of-the-river projects harness the energy of a river in a more controlled manner. By directing water through a turbine—similar to how rapids propel a kayak—these systems convert the river's kinetic energy into mechanical energy, and subsequently into electricity with minimal energy lost as heat.

Answer - A substance through which a wave can travel is a medium

Explanation:

A medium is the middle point between the crest and trough and it helps to Carry the wave or you can call it the disturbance of the wave . .

A substance through which a wave can travel is called a medium.

A medium acts as a conduit for the transfer of energy from one point to another by allowing the wave to propagate. Waves require a physical medium to transmit their energy because they rely on the interaction and displacement of particles within the medium.

When a wave passes through a medium, it causes the particles of the medium to vibrate or oscillate in a specific pattern. These vibrations transfer energy from one particle to the next, enabling the wave to travel. The type of medium determines the properties of the wave, such as its speed, direction, and behavior.

Electromagnetic waves, such as light and radio waves, can propagate through a vacuum because they consist of oscillating electric and magnetic fields rather than relying on particles for transmission. These waves can travel through space, allowing us to observe distant stars and communicate wirelessly.

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In United states,  the grasslands are seen in the great plains, prairies, and in the intermountain west regions. They are mostly seen in Oklahoma, Kansas, Nebraska, South Dakota etc.

The grasslands of Kenya are part of the East African savanna, which is characterized by warm temperatures, seasonal rainfall, and a mix of grasses and scattered trees. In the United States, similar grasslands are found in several regions, including:

The Great Plains: This region covers much of the central and western United States, and includes states such as Texas, Oklahoma, Kansas, Nebraska, South Dakota, and North Dakota. The Great Plains are characterized by a mix of grasses and scattered trees, and experience seasonal variations in rainfall.

The prairies: These are grasslands found in the central and western parts of the United States, including states such as Iowa, Illinois, Minnesota, Missouri, and Wisconsin. Like the Great Plains, the prairies are characterized by a mix of grasses and scattered trees.

The Intermountain West: This region covers parts of the western United States, including states such as Colorado, Wyoming, Montana, and Idaho. The Intermountain West is characterized by high-elevation grasslands and scrublands, which are adapted to the region's arid climate and rocky soils.

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The Great Plains in the United States are most similar to the grasslands of Kenya, as both are characterized as temperate grasslands dominated by grasses.

The areas in the United States that are most like the grasslands of Kenya, particularly the savannas of the Taita Hills Wildlife Sanctuary, are the Great Plains. The Great Plains region stretches across the central part of the US and is characterized by vast grasslands. This similarity is due to both regions being temperate grasslands, where the dominant vegetation is grasses and rainfall is moderate, creating an environment that does not support dense forests but does support a rich variety of grasses and herbaceous plants. The climate and ecology of the Great Plains share similarities with the Kenyan savannas, though there are also distinct differences in terms of specific flora and fauna due to geographical separation and varying climate conditions.

Answer: Frequency

Explanation:

The value of two per second is a measure of the frequency of a wave. It indicates that the wave completes two cycles in one second.

In physics, frequency and period are two related concepts that are used to describe the properties of waves. Period, on the other hand, is a measure of the time it takes for one complete cycle of a wave.

Here,
Frequency is a fundamental property of waves, and it determines the pitch of sound waves and the color of light waves. Waves with a high frequency have a high pitch or a high color temperature, while waves with a low frequency have a low pitch or a low color temperature.

In general, the higher the frequency of a wave, the more energy it carries and the shorter its wavelength. The relationship between frequency and other properties of waves, such as wavelength and speed, is described by various wave equations and laws in physics.

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Answer:

I think it is A

Explanation: Wavelength is the distance from one crest to another, or from one trough to another, of a wave (which may be an electromagnetic wave, a sound wave, or any other wave). Crest is the highest point of the wave whereas the trough is the lowest.

Answer:

The nervous system does depend on other systems visa versa.

Explanation:

They depend on each other because the brain needs nutrients given from the system and also the systems need the sensors from the nervous system.

This graph shows data up to about 2010. So it couldn't have been drawn before 2010. OF COURSE the data from only 10 years earlier was more reliable than the data that was 120 years old ! It wasn't even measured the same way back then as it is now.

Error bars are used to show the error in a reported measurement. The reason why the error bars are smaller near the year 2000 than in the 1890s because the ways of measuring have changed majorly over the past 100 years. The ways of measuring 100 years ago were probably not as accurate as the ways of measuring today.

Best of Luck!

Answer:

3 m/sec(squared)

Explanation:

a=change in velocity/time

a=v-u/t

a=36-0=36/12

a=3m/s(squared)

The acceleration is 3 m/s².

To calculate the acceleration, the velocities given are:

Initial velocity u = 0 m/s,

Final velocity v = 36 m/s,

Time, t = 12 seconds.

Definition:

      Acceleration can be defined as the total change in velocity, i.e., change in final velocity to the change in initial velocity to the total time taken.

       Acceleration is a vector quantity as it has both magnitude and direction.

  Formula for Acceleration, a = (( v - u) /t ) m/s².

                        [tex]\overline{a} = \frac{v - v_0}{t} = \frac{\Delta v}{\Delta t}[/tex]

v = Final velocity

u = Initial velocity

t = Time taken

Substitute all the given values in the formula,

            a = ( 36 - 0) / 12

               = 36 / 12

            a = 3 m/s².

Thus, the truck's acceleration is calculated as 3 m/s².

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Answer:

yes

Explanation:

Answer:

The solution becomes more acidic.

Explanation:

As the pH of a solution decreases, the concentration of hydrogen ions [H+] increases. Acidic solutions have a higher concentration of hydrogen ions and a lower pH.

I hope this helped. :)

Answer:

nonmetals

Explanation:

Explanation:

F = ma

120.0 N = (3.00 kg) a

a = 40.0 m/s²

Light can travel through empty space (a), has no mass (b) and is made up of moving electric and magnetic fields (d). It does not consist of moving electrons.

In analyzing the statements about light, the following are true:

Statement c which says light has moving electrons is untrue. Instead, light is made up of particles called photons, which are massless and don't consist of electrons.

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Answer:

  The answer is C) at the very bottom of the hill because the top of a slope has the most potential energy and as it goes down it is converted to kinetic energy, so at the very bottom there is more kinetic energy.

Explanation:

Since potential energy is most concentrated at the peak of a slope and is transformed into kinetic energy as it descends, there is greater kinetic energy toward the bottom of the hill. Hence, option C is correct.

Kinetic energy is a type of power that a particle or an object possesses as a result of its motion. By exerting a net force on an item, work is done, which transfers energy; as a result, the object accelerates and obtains kinetic energy. A moving item or particle's ability to move depends on both its mass and velocity. This is known as kinetic energy. Translation (or movement along the path from one location to another), revolution about there being an axis, vibrations, or any combo of motions are examples of possible types of motion.

A body's squared translational kinetic energy, or 1/2mv², is equivalent to one the product of its mass, m, and its velocity, v.

Therefore, this concludes that option (C) is correct.

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The first blank is matter I'm not sure about the rest

Answer:

Matter

invisible

Things

nothing

nothing

Explanation:

I sounds like it goes there. :D

The mechanical advantage of the bicycle is 0.1.

Explanation:

A simple machine is a machine that produces the output if we give the required input, and so the output always depends on the input force. Sometimes machines can also reduce the input force to get the required output and the ratio of output to input force is called as the mechanical advantage.

MA = [tex]$\frac{F_{o} }{F_{i} }[/tex]

Now we have the input force = 697 N

Output force = 93 N

So Mechanical advantage can be calculated by inserting those values as, MA = [tex]$\frac{93}{697}\\[/tex]

     = 0.1

So the mechanical advantage of the bicycle is 0.1.

The mechanical advantage (MA) of the bicycle is calculated by dividing the load force by the effort force, resulting in an MA of 0.1 when rounded to the tenths place.

To calculate the bicycle's mechanical advantage (MA), we use the ratio of the load force to the effort force. The formula for mechanical advantage is:

MA = Load Force / Effort Force

Given that the effort force exerted is 697 N, and the load force is 93 N, we plug these values into the formula:

MA = 93 N / 697 N

Calculating this gives us the mechanical advantage of the bicycle, which is:

MA = 0.1334

Rounded to the tenths place:

MA = 0.1

Answer:

the sixth most abundant element in the earth's crust is sodium and it occupies 2.8%

Final answer:

The six next most abundant elements after oxygen and silicon make up 23.7% of the Earth's crust.

Explanation:

The student asked about the percentage of the Earth's crust made up by the six next most abundant elements after oxygen and silicon. Given that Oxygen and Silicon together make up 74.3% of the Earth's crust (46.6% oxygen and 27.7% silicon), we know that the eight most abundant elements constitute 98% of the Earth's crust. To find the combined percentage of the six following most abundant elements, we subtract the percentage of oxygen and silicon from 98%, which is 98% - 74.3% = 23.7%. Hence, aluminium, iron, calcium, sodium, potassium, and magnesium together make up 23.7% of the Earth's crust.

An unopened door pushed by two people with same force is the example for balanced Fnet=0N

Explanation:

There are two types of forces that acts on an object.

Balanced force and unbalanced force

In balanced force the net force becomes zero as the name itself indicates that the forces acting on the object gets balanced and cancels out each other.

Example:- Consider a door, and if two people with equal forces are trying to push the door. Then the net force becomes zero as the door remains not opened.

In unbalanced force the net force will not be zero as the forces acting on them are not equal.

Example: Soccer game ball pushed by the player is the best example.

The net force describes the sum or all the forces acting in the different directions on an object. When the net force is 0, then the force is balanced, otherwise, it is unbalanced.

A scenario where we have a balanced force would be a situation whereby a box at rest is being pushed in opposite direction.

When the force which tends to propel the box forward is equal to the force which tends to push the ball backward. Then the ball would not move and remain in the same position.

Hence, the net force acting on the box is balanced.

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