Explain why the coin is able to float on top of the water in this glass.

Answer:

Because the light only spears to part of the water so it would appear less deep

The energy released during the nuclear change is 2.853*10^(-12) J.

A nuclear change -- involves changes in nuclear structure, such as fission (splitting) of a nucleus or an atom, or fusion (combining) of neutrons and protons to form heavier atoms

Given that,

Total mass

\(m=2.3465\times 10^{-27}\ kg\)

After change , the mass of resulting materials

\(m'=2.3148\times 10^{-27}\ kg\)

Using the Einstein's mass energy equation

\(E=mc^2\)

The energy released during the change is given by

\(\Delta E=mc^2\)

Where,  \(\Delta m\) is the change of mass in the process

c = speed of light

The change in mass

\(\Delta m=m-m'\)

\(\Delta m=2.3465\times 10^{-27}-2.3148\times 10^{-27}\)

\(\Delta m =0.0317\times 10^{-27}\ kg\)

We substitute the value into the formula

\(\Delta E=0.0317\times 10^{-27}\times (3\times 10^8)^2\)

\(\Delta E=2.853\ti,es 10^{-12}\ J\)

Hence, The energy released during the change is 2.853*10^(-12) J.

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Answer:

A

Explanation:

When a student is conducting an experiment, one piece of safety equipment that is necessary in the case of a chemical spill on the student's clothes is an eye wash station.

Eye wash stations are necessary for safety purposes in case chemicals or other hazardous substances accidentally enter the eye.

An emergency eye wash station should be installed in an accessible location for flushing and washing eyes exposed to chemicals.

It is also important to note that students should wear protective clothing such as gloves, lab coats, and safety goggles when working with chemicals in the lab.

The lab coat should be long-sleeved and cover the knees, and it should be made of a durable material that will resist chemicals and other hazards.

In case of a chemical spill on the lab coat, it should be removed immediately, and the student should wash the exposed skin with soap and water.

In addition, the student should be instructed on how to dispose of the contaminated clothing and chemicals properly to prevent exposure to others.

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It's important to note that the time required for bed accumulation can vary greatly depending on the specific depositional setting and the geological context. Therefore, while thick beds generally suggest longer deposition periods, the exact relationship between bed thickness and time can be influenced by a range of geological factors.

The time required for the accumulation of sedimentary beds, whether thick or thin, can vary depending on various factors. Thick beds generally represent a longer period of sediment deposition compared to thin beds or laminations. This is because thick beds typically result from the continuous or episodic deposition of sediment over an extended period of time, whereas thin beds or laminations may form more rapidly or in a shorter time span.

The formation of thick beds can be influenced by factors such as sediment supply, depositional environment, and sedimentation rates. For example, in environments with high sediment input, such as river deltas or turbidite systems, thick beds may accumulate relatively quickly due to the large volume of sediment being transported and deposited.

On the other hand, thin beds or laminations often result from more rapid or intermittent sedimentation processes. These thinner layers can be associated with processes like periodic flooding events, storm deposition, or the settling of fine-grained sediments in calm environments.

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Answer:

Explanation:

Reactants

BaSO4 has 4 oxygens and only 1 sulfur. That's a good thing to notice.

H2SO4 has 4 oxygens and only 1 sulfur.

The reactants have 4 + 4 oxygens = 8 oxygens.

Products

It is right, but you might struggle a bit with the answer.

Notice that HSO4 is in brackets followed by a two

(HSO4)2        

When the 2 is outside the brackets, everything inside the brackets get's doubled.

There are 2 Hs

There are 2 Ss

There are 4 * 2 Oxygens = 8 oxygens, some as the reactants.

Break the product into simplified form

\(\\ \sf\longmapsto Ba(HSO_4)_2\)

\(\\ \sf\longmapsto BaH_2S_2O_8\)

Oxygen on products side=8

#2.

Oxygen on reactant side=4+4=8atoms

The support force acting on a 200-N girl standing on a weighing scale depends on the gravitational field strength of the location. The correct answer is option d) It depends on the gravitational field strength of the location.

The support force, also known as the normal force, is the force exerted by the surface on an object in contact with it. In this case, the weighing scale exerts a support force on the girl. According to Newton's third law of motion, the girl exerts an equal and opposite force on the weighing scale.
The gravitational field strength varies from location to location. It depends on the mass and distance from the centre of the Earth. Therefore, the support force acting on the girl will also vary depending on where she is standing.
For example, if the girl is standing on the surface of the Earth, where the gravitational field strength is approximately 9.8 m/s², the support force acting on her would be equal to her weight, which is 200 N. On the other hand, if she were standing on the Moon, where the gravitational field strength is approximately 1.6 m/s², the support force acting on her would be less than her weight.
In conclusion, the support force acting on a 200-N girl standing on a weighing scale depends on the gravitational field strength of the location.

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Answer:

K = 5706.6 J

Explanation:

Given that,

The mass of a bullet, m = 50 g = 0.05 kg

The velocity of the bullet, v = 720 km/hr = 477.77 m/s

We need to find the kinetic energy of the bullet​. The kinetic energy of an object is due to its motion. It can be given by the formula as follows :

\(K=\dfrac{1}{2}mv^2\\\\=\dfrac{1}{2}\times 0.05\times 477.77 ^2\\\\K=5706.6\ J\)

So, the required kinetic energy of the bullet is equal to 5706.6 J.

Answer:

chemical change .....

 An atomic mass unit is defined as a mass equal to one-twelfth the mass of an atom of carbon-12

The dalton, also known as the unified atomic mass unit (symbols: Da or u), is a non-SI unit of mass that is commonly used in physics and chemistry. It is defined as 112 times the mass of an unbound neutral carbon-12 atom in its nuclear and electronic ground states and at rest. The atomic mass constant, mu, is defined similarly, with mu = m(12C)/12 = 1 Da.

An atom's mass is its atomic mass (ma or m). Although the kilogram (symbol: kg) is the SI unit of mass, the unified atomic mass unit (u), or dalton (symbol: Da), is frequently used to express atomic mass. An unbound carbon-12 atom in its ground state has a mass of 112 of a Da. Nearly all of an atom's mass is made up of its protons and neutrons, with the electrons and nuclear binding energy making up the remainder. As a result, the atomic mass expressed in daltons has a value that is very similar to the mass number. The atomic mass constant can be used to convert mass between kilograms and daltons.

In both physics and chemistry, this unit is frequently used to express the mass of atomic-scale objects, such as atoms, molecules, and elementary particles, both for discrete instances and various ensemble average types. For instance, the mass of a helium-4 atom is 4.0026 Da. All helium-4 atoms have the same mass, which is an intrinsic property of the isotope. The average mass of aspirin, or acetylsalicylic acid, is about 180.157 Da. But no molecules of acetylsalicylic acid have this mass. Individual molecules of acetylsalicylic acid typically have two masses: 180.0423 Da, which has the most prevalent isotopes, and 181.0456 Da, which has one carbon which is carbon-13.

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The maximum speed of a block of ice sliding down an incline depends on several factors, including the slope of the incline and the coefficient of friction between the block and the surface. Assuming that the incline is frictionless, the block will accelerate as it slides down the slope and reach its maximum speed at the bottom.

This is because the gravitational force acting on the block is the only force acting on it, and it gains kinetic energy as it moves down the incline. However, if there is friction between the block and the surface, the maximum speed will occur before the bottom of the incline, depending on the coefficient of friction. In general, the lower the coefficient of friction, the closer the maximum speed will be to the bottom of the incline. Therefore, the answer to the question is B) the bottom, assuming a frictionless surface, but it is difficult to predict without knowing the coefficient of friction if the surface is not frictionless.

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Answer:

Reaches max height at t = 2.42s.

Explanation:

I've assumed we are neglecting air resistance. If not let me know and I'll update.

We want to examine the behaviour of the ball in the y-direction. In the absence of air resistance the only force acting on the ball is gravity, which produces an acceleration in the negative y direction.

A. Yes, the request is worthwhile to make as it would enable the camp to have a clearer image when they are using the remote surgery equipment.

Surgery is a medical procedure that involves the physical manipulation of a bodily structure or tissues to diagnose, prevent, or cure an ailment. It includes operations such as cutting, dissecting, removing, or repairing body tissues or organs. Surgery is a form of treatment that can be used to repair broken bones, treat cancer, and reconstruct facial features.

B. Yes, the request relates to the users' needs as they need a faster Internet connection in order to transmit enough pixels to get a clear image.
C. A possible constraint that might cause the request to be denied is the cost of the faster Internet connection.
D. Evidence that could be used to support the request includes statistics on the current Internet connection speed, the cost of the faster connection, and the benefits of the better image quality.

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The power exerted by the horse is 1,000 watts, which is equivalent to 1 kilowatt (kW).

To find the work done by the horse and the power exerted, we can use the following equations:

Work = Force x Distance x cos(theta)

Power = Work / Time

where theta is the angle between the direction of the force and the direction of the displacement. Assuming that the force is applied horizontally and the displacement is also horizontal, the angle theta is 0 degrees, so cos(theta) = 1.

Given that the force applied by the horse is 1500 N and the distance moved is 10 m, we can calculate the work done as follows:

Work = Force x Distance x cos(theta)

Work = 1500 N x 10 m x 1

Work = 15,000 J

Therefore, the work done by the horse in pulling the tree trunk is 15,000 joules.

To find the power exerted by the horse, we need to divide the work done by the time taken. Given that the time taken is 15 seconds, we have:

Power = Work / Time

Power = 15,000 J / 15 s

Power = 1,000 W

Therefore, the power exerted by the horse is 1,000 watts, which is equivalent to 1 kilowatt (kW).

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Spraying an asphalt road with water will make it easier to walk across and bare feet on a hot sunny day because it has a high specific heat capacity.

This is referred to as the amount of heat which is required to raise the temperature of the unit mass of a given substance by a given amount.

Water as a compound has a very high specific heat capacity which means that it needs a high amount of heat for the temperature to change. This therefore means that when the water is sprayed on the surface, the road doesn't become too hot and can be walked on with the barefoot which makes it the correct reason.

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Answer: C. Metals are found on the left side of the periodic table.

Explanation:

The periodic table contains vertical columns called as groups and horizontal rows called as periods.

Period 2 contains 8 elements which are lithium, beryllium , boron , carbon, nitrogen, oxygen , fluorine and neon. Only Lithium and beryllium are metals.

Group 18 contains all the noble gases which are all non metals.

Metals are the elements which loose electrons easily and form positive ions. Non-metals are the elements which can gain electrons easily and form negative ions.

Metals are present on left side of the periodic table and as we move to right side of the periodic table , the metallic character decreases and thus non metals are found on the right side of the periodic table.

Answer:

Explanation:

The kinetic energy of an object can be found by using the formula

\(k = \frac{1}{2} m {v}^{2} \\\)

m is the mass

v is the velocity

From the question we have

\(k = \frac{1}{2} \times 1400 \times {30}^{2} \\ = 700 \times 900 \\ = 630000\)

We have the final answer as

Hope this helps you

Answer:

im guessing red giant-

When light is either reflected or refracted, the quantity that does not change in either process is its speed. Therefore, option (d) is the correct answer, speed.

The change in direction of light wave when it hits a surface and bounces back is known as reflection. The reflected light ray moves off at the same angle to the surface (angle of incidence) as it strikes the surface. The angle of incidence is the angle at which the incoming ray strikes the surface, and the angle of reflection is the angle at which the light reflects off the surface.

The process by which light bends as it passes from one medium to another with different densities is known as refraction. It is due to a change in speed, which causes light to change direction. When light passes from a medium with a higher index of refraction to one with a lower index of refraction, it bends away from the normal.

Conversely, if light passes from a medium with a lower index of refraction to one with a higher index of refraction, it bends toward the normal.

The quantity that does not change in either process is speed. Regardless of the angle at which it is reflected or the substance through which it passes when it is refracted, light always travels at the same speed.

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The production function will have constant returns to scale if 2αβ = 1

Constant returns to scale (CRS) implies that if all inputs increase by a factor of λ, the output increases by λ as well. The requirement for constant returns to scale (CRS) in a Cobb-Douglas production function with a new input factor is given by the sum of exponents on all variables equal to 1.

In this case, Y = AKαLβMγ.

Thus, we have that α + β + γ = 1 for constant returns to scale in K, L, and M, because the sum of the exponents is 1.

If the sum of the exponents is less than 1, it indicates decreasing returns to scale. If the sum of the exponents is greater than 1, it indicates increasing returns to scale. If we take γ = 0, we obtain the production function used in class, which is Y = AKαLβ, thus α + β = 1 for constant returns to scale in K and L.

When γ = 0, the answer we get is consistent with what we learned in class. Now, we consider the constant elasticity of substitution (CES) technology, where Y = [aKα + bLα]β. The production function will have constant returns to scale (CRS) in K and L if the sum of the exponents of K and L is equal to 1.

Therefore, αβ + αβ = 1, implying 2αβ = 1.

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Answer:

The eight Moon phases:

Waxing Crescent: In the Northern Hemisphere, we see the waxing crescent phase as a thin crescent of light on the right. First Quarter: We see the first quarter phase as a half moon. Waxing Gibbous: The waxing gibbous phase is between a half moon and full moon.

The phases of the Moon are the different ways the Moon looks from Earth over about a month. As the Moon orbits around the Earth, the half of the Moon that faces the Sun will be lit up. The different shapes of the lit portion of the Moon that can be seen from Earth are known as phases of the Moon.

Explanation:

Hope it is helpful....

Answer: i think u can put this The phases of the Moon are the different ways the Moon looks from Earth over about a month. As the Moon orbits around the Earth, the half of the Moon that faces the Sun will be lit up. The different shapes of the lit portion of the Moon that can be seen from Earth are known as phases of the Moon

Don't forget to drop a heart have a happy friday

Given data

*The given distance is s = 128 m

*The initial speed of the motorcycle is u = 0 m/s

*The final speed of the motorcycle is v = 32.6 m/s

The expression for the acceleration of the bike is given by the kinematic equation of motion as

Substitute the known values in the above expression as

Hence, the acceleration of the bike undergoes is a = 4.15 m/s^2

The speed of the 1.2 kg block after the spring is released is 3 m/s to the left.

According to the question, a 1.2 kg block and a 1.8 kg block are initially at rest on a frictionless, horizontal surface. When a compressed spring between the blocks is released, the 1.8 kg block moves to the right at 2.0 m/s as shown. We need to determine the speed of the 1.2 kg block after the spring is released.The system's initial momentum is zero since the blocks are at rest. The system's final momentum is made up of the 1.2 kg and 1.8 kg blocks' respective momenta. As a result, the conservation of momentum equation becomes:m1i * v1i + m2i * v2i = m1f * v1f + m2f * v2fWhere m1i * v1i is the 1.2 kg block's initial momentum, m2i * v2i is the 1.8 kg block's initial momentum, m1f * v1f is the 1.2 kg block's final momentum, and m2f * v2f is the 1.8 kg block's final momentum.

As the 1.8 kg block moves to the right at 2.0 m/s after the spring is released, its momentum is:m2i * v2i = 1.8 kg * 0 m/s = 0 kg * m/sm2f * v2f = 1.8 kg * 2 m/s = 3.6 kg * m/sTo calculate the final momentum of the 1.2 kg block, we must first determine its final velocity. We can rearrange the conservation of momentum equation above to solve for v1f:m1f * v1f = m1i * v1i + m2i * v2i - m2f * v2fv1f = (m1i * v1i + m2i * v2i - m2f * v2f) / m1fPlugging in the values:v1f = (1.2 kg * 0 m/s + 1.8 kg * 0 m/s - 1.8 kg * 2 m/s) / 1.2 kgv1f = -3 m/s. Therefore, the speed of the 1.2 kg block after the spring is released is 3 m/s to the left.

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Therefore, the power output of the electric pump is 981 watts.

To calculate the power output of an electric pump, we need to use the formula:

Power = Work done / time

The work done by the pump is equal to the potential energy it gives to the water as it raises it up from the borehole. The potential energy of the water is given by:

Potential energy = mass * gravity * height

where mass = 10 kg, gravity = 9.81 m/s^2, and height = 10 m.

So, potential energy = 10 * 9.81 * 10 = 981 J

If the pump is required to raise this amount of water in 1 second, then the work done per second (power) is 981 J/s, or 981 watts.

Therefore, the power output of the electric pump is 981 watts.

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A.

In order to calculate the kinetic energy of the box, we can use the formula below:

Where m is the mass and v is the velocity.

Using m = 12 kg and v = 3 m/s, we have:

B.

The work done by Jim can be calculated with the formula below:

Where F is the force and d is the distance.

The force applied is equal to the weight force of the box, so:

The eardrum amplifies sound vibrations for perception and signal transmission to the brain.

The intensity of a sound wave determines the loudness perceived by our ears. In this case, a sound wave with an intensity of 2.5×10−3 W/m2 is considered modestly loud. The eardrum, a thin, flexible membrane located at the entrance of the ear canal, plays a crucial role in the process of hearing. When sound waves enter the ear, they cause the eardrum to vibrate. The eardrum amplifies these vibrations and transfers them to the middle ear ossicles, which consist of the malleus, incus, and stapes. These ossicles further amplify the vibrations and transmit them to the cochlea, a spiral-shaped structure in the inner ear. Within the cochlea, hair cells convert the vibrations into electrical signals that are sent to the brain via the auditory nerve. This allows us to perceive and interpret the sound.

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The necessary distance for the block to land on the toboggan is (a) D = sqrt(vo^2/(2g) - H), while the resulting velocity of the block and toboggan after they stick together upon landing is (b) v = sqrt(2gh - 2gD + vo^2).

To solve this problem, we can apply the principle of conservation of energy, which states that the total energy of a closed system remains constant. Initially, the system consists of only the block of mass M1, which has kinetic energy due to its constant speed vo. At the end, the system consists of both the block and the toboggan, which have gravitational potential energy due to their height above the ground. We can set these two energies equal to each other and solve for D to find where the block will land on the toboggan.

(a) The gravitational potential energy of the block and toboggan when they are at height H above the ground is:

U = (M1 + M2)gh

where g is the acceleration due to gravity. Since the block is traveling horizontally with constant speed, it has no change in potential energy. Thus, we can equate the initial kinetic energy of the block to the final potential energy of the system:

1/2 M1 vo^2 = (M1 + M2)gh

Solving for distance D, we get:

D = sqrt(vo^2/(2g) - H)

(b) Since the block sticks to the toboggan, the total mass of the system is now M = M1 + M2. The initial kinetic energy of the block is now shared by the block and toboggan. Let v be the velocity of the block and toboggan after they stick together. By conservation of energy:

1/2 M1 vo^2 = Mg(H - D) + 1/2 Mv^2

where the first term on the right side is the gravitational potential energy of the block and toboggan after they land on the toboggan, and the second term is their kinetic energy. Solving for velocity (v), we get:

v = sqrt(2gh - 2gD + vo^2)

Therefore, The first answer gives the distance D in terms of the initial velocity vo, height H, and acceleration due to gravity g for the block to land in the center of the toboggan. The second answer gives the resulting velocity v of the block and toboggan, taking into account the height H, initial velocity vo, and distance D from the base of the cliff to the center of the toboggan.

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From least to greatest energy, the types of radiation are:

a. Radio Waves

b. Microwaves

c. Infrared

d. Red Visible Light

Radiation refers to the emission of energy as electromagnetic waves or as moving subatomic particles, especially high-energy particles that cause ionization.

There are two main types of radiation: electromagnetic radiation and particulate radiation.

Electromagnetic radiation includes radio waves, microwaves, infrared radiation, visible light, ultraviolet radiation, X-rays, and gamma rays. Particulate radiation includes alpha particles, beta particles, and neutrons. Radiation plays a critical role in various natural and technological processes, but excessive exposure to ionizing radiation can be harmful to human health.

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Answer:

D, Air Quality Index :)

Hope this helped!

P.S. : Can I get brainliest please?

Initial speed = 2√10 m/s

Linear motion consists of 2: constant velocity motion with constant velocity and uniformly accelerated motion with constant acceleration  

An equation of uniformly accelerated motion  

V = vo + at  

Vt² = vo² + 2a (x-xo)  

x = distance on t  

vo / vi = initial speed  

vt / vf = speed on t / final speed  

a = acceleration  

vf=20 m/s

d = 60 m

a = 3 m/s²

\(\tt vf^2=vi^2+2.ad\\\\20^2=vi^2+2\times 3\times 60\\\\400=vi^2+360\\\\40=vi^2\\\\vi=\sqrt{40}=2\sqrt{10}~m/s\)

Answer: Use Roman Numerals in answering. 11. - 27310189. ... Hiwalay! Hatol. Unang puntos, Bughaw! 12. Hinto! Pula, pangalawang laglag. Panalo ...

Explanation:. Hinto! Hiwalay! Bughaw, 1 puntos. Unang paglabag! 14. Hinto! Bughaw, pangalawang paglabag