Given the word equation below:
sodium + water + sodium hydroxide + hydrogen
What are the reactant(s)?
a
sodium hydroxide and hydrogen
b sodium and water
sodium and sodium hydroxide
d water and hydrogen

Answer:

Zero

Explanation:

Answer:

384N

Explanation:

Given parameters:

Mass  = 3kg

radius  = 0.5m

Speed  = 8m/s

Unknown:

Centripetal force  = ?

Solution:

The centripetal force is the inward force that keeps a body in motion along a circular path.

It is mathematically expressed as;

      F = \(\frac{mv^{2} }{r}\)  

m is the mass

v is the speed

r is the radius

 Now insert the parameters and solve;

     F  = \(\frac{3 x 8^{2} }{0.5}\)   = 384N

Answer:

C. The wave only transfers energy, not matter.

Explanation:

A boat that is bumped by a wave is not actually moved to another position in the water because the wave only transfers energy, not matter.

Basically, waves can only transfer energy over a distance from one point to another without moving matter such as a boat.

This ultimately implies that, a wave can only move an energy but do not move matter.

In science, matter can be defined as anything that has mass and occupies space. Thus, any physical object that is found on earth is typically composed of matter and are generally made up of atoms.

Answer: C

Explanation:

D. Black represents the lowest surface temperature for a star.

Surface temperature refers to the temperature of the surface of an object or a material. In astronomy, it usually refers to the temperature of the outer visible layer or "surface" of a star. This temperature can be estimated by measuring the radiation emitted by the star and analyzing its spectrum.

Here,
Black color refers to objects that absorb all colors and do not reflect any, indicating that they do not emit any significant radiation. Stars with low surface temperatures are not hot enough to emit visible light, so they appear black or invisible to the eye. However, they still emit some radiation, usually in the form of infrared light, which can be detected using specialized equipment.

Of the colors listed, red is actually the color associated with the lowest-temperature stars that are visible to the eye, while blue is associated with the hottest. However, stars with even lower surface temperatures will not emit visible light and would be invisible or appear black.

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The most scientific guess (hypothesis) based on what is known about the behavior of galaxies is that Galaxies are continuously moving away from each other. This hypothesis can be tested using Hubble's Law.

Hubble's law indicates that almost all galaxies are moving apart from one another because the universe as a whole is expanding. Choose any two galaxies at arbitrarily, and they're most likely traveling apart from each other.

Hubble discovered that galaxies move away from us at a rate proportionate to their distance: more distant galaxies move away faster than closer ones. The accompanying graphic shows Hubble's classic graph of measured velocity vs. distance for neighboring galaxies.

The graph shows a linear relationship between galaxy velocity (v) and distance (d).

The equation for the above linear relationship is:

                                          v = H₀ x d

Where:

H₀ is the expansion rate

v = velocity of the galaxy; and

d = distance.

Using the above formula, the astronomer can measure or test to know whether indeed the new galaxy is moving relative to the Milky Way galaxy and at what rate.

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Answer:

709.5 cal

Explanation:

masa m de la barra de aluminio = 100 g

temperatura ambiente = 27 ° C

Asumiremos que la barra de aluminio está en equilibrio térmico con el ambiente.

Esto significa que la temperatura inicial de la barra es de 27 ° C

temperatura final a la que la barra debe calentarse = 60 ° C

el aumento de temperatura ΔT será

ΔT = 60 ° C - 27 ° C = 33 ° C

capacidad calorífica específica c del aluminio = 0.215 cal/g°C

Calor C requerido = mcΔT

C = 100 x 0.215 x 33 = 709.5 cal

Answer:

The nucleus has an overall positive charge as it contains the protons. Every atom has no overall charge (neutral). This is because they contain equal numbers of positive protons and negative electrons. These opposite charges cancel each other out making the atom neutral.

Answer:

Since gravitational force is inversely proportional to the square of the separation distance between the two interacting objects, more separation distance will result in weaker gravitational forces. So as two objects are separated from each other, the force of gravitational attraction between them also decreases.

When dealing with the force of gravity between two objects, there are only two things that are important – mass, and distance. The force of gravity depends directly upon the masses of the two objects, and inversely on the square of the distance between them.

Explanation:

I could be wrong but I would say B :)

Have a good day!

answer:

i believe the answer is d

explanation:

here's why;

c. is incorrect because everything has a gravitational force.

a. is also incorrect because gravity is what holds the tennis ball down and keeps it on the ground.

i don't really know how to explain why b. is wrong, but d. is the correct answer because the force of friction opposes the motion of an object, causing moving objects to lose energy and slow down.

good luck :)

i hope this helps

**please let me know if this was incorrect**

have a great day !!

Answer:

Explanation:

In physics, work can be described as force multiplied by the displacement of the object (distance caused by the force acted on the object).

Work is a form of energy, therefore, it is measured in joules.

If Alex pushed on an object with 10N of force, and the object moved 2 meters, the work of Alex will be equal to:

W = Ft

W = 10N * 2m

W = 20 Joules

But, if we have John, that pushed on an object with 2N of force, but, since the object was way smaller, therefore it had way less inertia, the object moved a distance equal to 10 meters. Let's also calculate his work.

W = Ft

W = 2N * 10m

W = 20 Joules

And we got the same result.

Work can also be used to calculate power.

Power is equal to P = Work / time

It can also be written as P = delta Work / delta time

Power is measured in joules per second.

With power you can make the difference between someone that got a 2 kg object up in 2 second, and someone that got a 2 kg object up in 5 second.

The more powerful one would be the one who managed to make the same work in less time.

Hope it Helped!

Work is described as: the measure of energy transfer resulting from the application of force over a displacement.

In the field of physics, work is most accurately defined as the outcome of multiplying the force exerted on an object by the distance the object is displaced in the same direction as the force.

This calculation serves to quantify the energy transferred to or from the object. For instance, if an individual applies a 50 Newton force to push a box across a 5-meter distance in the force's direction, the work done on the box would equal 250 Joules (50 N × 5 m).

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Answer:-750 kg*m/s

Explanation:

Momentum = mass*velocity

Momentum = 15kg*(-50 m/s)

Momentum = -750 kg*m/s

Experiment 1 Understanding of low voltage electrical apparatus: Purpose of the experiment1) Master the usage of common electrical tools.2) Master the common identification methods of low pressure.3) Master the function of low-voltage electrical apparatus and their correct application. Experiment contents and requirements

The experiment requires observing common low-voltage apparatus and understanding their structure. The following requirements are required:1. Drawing electrical symbols2. Writing text symbols3. Describing the basic working principle and function of low-voltage electrical components that are observed in the experiment report and content for the experiment report, follow this steps:1. Purchase the uniform standard experimental report paper in the academic affairs office.2. Fill in according to the items specified in the test report.3. Draw the electrical symbols and write the text symbols according to the observed low-voltage electrical components.4.

According to the observed low-voltage electrical components, the basic working principle and function are briefly described.

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It's essential to terminate coaxial cables with connectors rated for the exact cable type because it ensures optimal performance, signal integrity, and impedance matching.

Terminating a coaxial cable with connectors that are rated for the exact cable type is important because it ensures optimal performance and signal integrity. Coaxial cable is designed to carry high-frequency signals, and the connectors play a crucial role in maintaining the quality of those signals. Different cable types have different electrical characteristics, such as impedance, capacitance, and attenuation, and using the wrong connectors can lead to impedance mismatches, signal loss, interference, and other issues. For example, if you use connectors with a higher impedance rating than the cable, it can cause reflections and reduce the amount of power that reaches the destination. On the other hand, if you use connectors with a lower impedance rating, it can cause signal distortion and reduce the signal-to-noise ratio. Therefore, it is important to choose connectors that match the cable type and meet industry standards to ensure reliable and consistent performance.
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Choice-B is a relevant statement, although we can't see enough of the picture to actually know what's going on.

A good example of this scenario is our own moon.  Because of the Sun's  gravitational influence, the Moon's orbit around the Earth is not a circle or an ellipse.

Answer:

the weight of displaced liquid is equal to the submerged part of ship. so on adding more weight to ship net buyoncy acting on ship increases and more the ship sinks in sea thus weight of displaced liquid increases.

Explanation:

The 5-volt reading we can expect between the two test points if the reference lead is on the lowest voltage.

The given data is as follows:

The first test marked voltage = 5 volts

The second test marked voltage = -3.3 volts

Let us assume that the two test points are there is a conductive track between them, the voltage between the two points can be calculated using the voltage difference between the two test points.

The voltage difference between the  two test points is calculated as:

5 volts - (-3.3 volts) = 8.3 volts

If the reference lead is on the lowest voltage, It means that the negative side of the voltmeter is attached to the test point with the lower voltage which is -3.3 volts.

The voltage difference between the  two test points is

8.3 volts - 3.3 volts = 5 volts

Therefore we can conclude that the 5-volt reading we can expect between the two test points.

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Answer:

f = 1.5 Hz

Explanation:

Given that,

18 waves pass by a person in 12 seconds.

We need to find the frequency of these water waves.

We know that,

Frequency = no. of waves per second

So,

\(f=\dfrac{18}{12}\\\\f=1.5\ Hz\)

So, the frequency of these water waves is equal to 1.5 Hz.

Answer:

–0.11 N.

Explanation:

Hope this helps

The energy conversion that is taking place as the blades of the windmills rotate is known as kinetic energy conversion.

Kinetic energy is the energy of motion and it is created when a body moves. In the case of windmills, the blades capture the energy of the wind, which is converted into mechanical energy and then into electricity.
When the blades of the windmill rotate, the wind passes through them and transfers its kinetic energy to the blades. This kinetic energy is then converted into rotational energy and is used to turn the rotor inside the windmill. The rotor is connected to a generator, which converts the rotational energy into electrical energy. This electricity is then used to power various electrical systems.
In summary,  where the kinetic energy of the wind is converted into mechanical energy and then into electrical energy.

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the current rate of change in water level. For a brief moment, it is plummeting at 56.6 inside a mirror.

One can see a real or virtual picture in a mirror because it is a reflecting surface that reflects light. A mirror's reflection of an object when it is put in front of it produces the same image.

By examining the characteristics of the images they produce when an object is placed close to them, we may distinguish between the three types optical mirrors, namely plane mirror, convex mirror, and concave mirror.

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epidermal layer is made of basal cell layer that are consulting dividing

The physical activity should an adult have each week is "60 minutes per day, 5 days a week". The correct answer is option C.

WHO stands for the World Health Organization. It is a specialized agency of the United Nations responsible for international public health. The WHO is headquartered in Geneva, Switzerland, and works in partnership with national governments and other organizations to promote health, keep the world safe, and serve the vulnerable. The organization's primary objective is to ensure that people can enjoy the highest possible level of health, regardless of their race, religion, or socioeconomic status. The WHO's work includes providing leadership on matters critical to health, setting norms and standards, promoting health research and evidence-based practice, and providing technical support to countries.

Here in the Question,

Option A, "60 minutes per day, 7 days a week," and option B, "30 minutes per day, 7 days a week," both suggest that physical activity should be performed every day of the week. While daily physical activity is beneficial for overall health and well-being, the WHO recommendation allows for two days of rest or lighter physical activity per week, which can help prevent injury and allow for recovery.

Option D, "30 minutes per day, 5 days a week," suggests a lower amount of physical activity than the WHO recommendation. While 30 minutes of moderate-intensity aerobic physical activity per day can provide some health benefits, it may not be enough to achieve significant improvements in cardiovascular health, muscular strength, and flexibility.

Therefore, Option C, "60 minutes per day, 5 days a week," is the correct answer as it aligns with the WHO recommendation for adults to engage in at least 150 minutes of moderate-intensity aerobic physical activity per week.

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Hypervisors, guest machines, and host machines are important concepts in virtualization. A hypervisor is a software that allows multiple operating systems to run on a single hardware host machine.

Hypervisors are a type of virtualization software that allows multiple operating systems to run on a single hardware host machine. The host machine runs the hypervisor software, which creates virtual machines (VMs) that act as if they are independent machines running on their hardware.

The hypervisor acts as the main answer to maintain the operating systems and resource allocation.The guest machines, also known as virtual machines, are created by the hypervisor and are instances of a guest operating system that runs on the host machine.

Guest machines are isolated from each other, allowing different operating systems and applications to run without interfering with each other.

The host machine is the physical machine that runs the hypervisor software. It provides the necessary hardware resources, such as CPU, memory, and storage, to the guest machines.

The hypervisor manages the allocation of these resources to the guest machines based on their requirements.A diagram to illustrate this is as follows: [Insert diagram here]

Hypervisors, guest machines, and host machines are important concepts in virtualization. A hypervisor is a software that allows multiple operating systems to run on a single hardware host machine. The guest machines are virtual machines created by the hypervisor, which act as independent machines. The host machine is the physical machine that runs the hypervisor software and provides the necessary hardware resources to the guest machines. These concepts are important in understanding the virtualization technology and its benefits.

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Answer:

A thesis should be a statement that can be argued.

Explanation:

The bumblebee's speed that flies with a ground speed of 15.4 m/s converted to km/h gives approximately 55.44 km/h.

To convert the bumblebee's speed from meters per second (m/s) to kilometers per hour (km/h), we need to multiply the speed by a conversion factor. There are 3.6 km in 1 hour, so the conversion factor is 3.6.

Using the given ground speed of the bumblebee (15.4 m/s), we can calculate its speed in km/h as follows:

Speed in km/h = 15.4 m/s * 3.6 km/h

= 55.44 km/h

Therefore, the bumblebee's speed is approximately 55.44 km/h.

The bumblebee flies with a ground speed of approximately 55.44 km/h.

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Answer:summer

Explanation:

Answer:

first day of summer

Explanation:

Answer:

The answer is A. A transistor

Answer:

a transistor

Explanation:

A P E X

The heat of the surroundings is  - 4482 J.

A calorimeter is a device in which that is no exchange of heat between the device and the environment. In other words, there could only be exchange of heat when the a substance has been put inside the calorimeter.

We know that in a calorimeter;

Heat of the surrounding =  Heat of the system

That implies that they are of the same magnitude but of opposite direction hence the heat of the system is - 4482 J.

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The angle at which the first-order maximum occurs for 475-nm wavelength blue light falling on double slits separated by 0.0510 mm is approximately 0.53 degrees.

The angle at which the first-order maximum occurs for double-slit interference can be found using the formula:

sinθ = mλ/d

where θ is the angle between the central maximum and the first-order maximum, m is the order of the maximum (m = 1 for the first-order maximum), λ is the wavelength of the light, and d is the distance between the two slits.

In this case, we have:

λ = 475 nm = \(4.75 \times 10^{-7}\) m

d = 0.0510 mm = \(5.10 \times 10^{-5}\) m

m = 1

Substituting these values into the formula above, we get:

sinθ = mλ/d

= \(\dfrac{(1)(4.75 \times 10^{-7} m)}{(5.10 \times 10^{-5} m)}\)

≈ 0.0093

To find the angle θ, we can take the inverse sine of both sides:

θ = \(sin^{-1}(0.0093)\) ≈ 0.53 degrees

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