how cold does it have to be for boiling water trick

A cart moving at a constant speed of 25 m/s possesses 438 J of kinetic energy, and the mass of the car is 1.6 kg.

The energy an object has as a result of motion is known as kinetic energy. A force must be applied to an object to accelerate it. We must put in the effort to apply force. After the work is finished, energy is transferred to the item, which then moves at a new, constant speed.

Definition: When an object is moving at a constant speed—that is, its speed does not change—we say it is moving at a constant speed. steady rate

Given:

KE = 500 J

v = 25 m/s

The formula for Kinetic Energy is given:

KE = ½ mv²

where: KE - Kinetic Energy

m - mass

v - velocity

Substituting the value of KE and v in the formula,

500 J = (½)(m)(25 m/s)²

m = (500 J)(2)/(25 m/s)²

m = 1.6 kg

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As the hanging mass increases, the time taken by the weight to reach the ground decreases. This happens because an increase in the mass leads to an increase in gravitational force.

The difference between the 15g run and the 25g run in the video was that the 25g run took less time than the 15g run. The concrete evidence to support this observation is that the time taken by the weight on the 25g run was less than the time taken by the weight on the 15g run.

As the hanging mass increases, the time taken by the weight to reach the ground decreases. This happens because an increase in the mass leads to an increase in gravitational force. This results in an increase in the acceleration of the weight towards the ground.

Therefore, as the hanging mass increases, the time taken by the weight to reach the ground decreases.

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Answer:

Explanation:

In general, a scientific law is the description of an observed phenomenon. It doesn't explain why the phenomenon exists or what causes it. The explanation of a phenomenon is called a scientific theory.

It's worth noting that most molecules can exhibit a variety of intermolecular forces. The types of intermolecular forces that exist are determined by the molecule's specific structure and composition.

OH: The OH molecule can exhibit hydrogen bonding, which is a type of intermolecular force that occurs when a hydrogen atom is bonded to a highly electronegative atom such as oxygen or nitrogen.

Nitrogen gas (N2) is a nonpolar molecule that does not form hydrogen bonds. It can, however, exhibit van der Waals forces, which are weak attractive forces that occur between all molecules, including nonpolar ones like N2.

'N': It is unclear what is meant by "'N," but assuming it refers to a nitrogen-containing molecule, the types of intermolecular forces it can exhibit vary depending on the molecule. Hydrogen bonding can occur when a hydrogen atom is bonded to a highly electronegative atom, such as oxygen or nitrogen. If the molecule is polar (has a separation of positive and negative charge across the molecule), dipole-dipole interactions can occur. Van der Waals forces can be observed in nonpolar molecules.

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your on here to lol we must be hella failing g

Type II supernovae and star-forming regions are related to one another because Type II supernovae are the explosive deaths of massive stars, which often occur within star-forming regions.

Star-forming regions are areas within galaxies where new stars are actively being born. These regions contain large quantities of gas and dust, which serve as the raw materials for star formation. Young, massive stars are formed from these clouds of gas and dust through the process of gravitational collapse and subsequent nuclear fusion. Type II supernovae occur when massive stars, typically with at least eight times the mass of our Sun, reach the end of their lives. These stars have exhausted their nuclear fuel, causing their cores to collapse under their own gravity.

This collapse triggers a powerful explosion, releasing an enormous amount of energy and ejecting stellar material into space. This explosion is what we observe as a Type II supernova.  Because massive stars are primarily formed in star-forming regions, it is within these regions that the progenitor stars of Type II supernovae are typically found. The high concentration of massive stars increases the likelihood of a supernova event occurring. Additionally, the intense radiation and stellar winds from these massive stars can trigger further star formation in the surrounding regions, creating a cycle of star birth and death.

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Answer:

9.5 dkg= 0.095 kg

35dl= 3500 ml

275m= 27500 cn

0.216= 2.16e- hl

3hrs= 10800 sec

Answer:

Using Arrhenius' definition, acids are those that produce the hydrogen ion when dissolved in water ( ) while bases produce the hydroxide ion ( ). These ions, when in water, act as charge carriers and can hence conduct electricity. Stronger acids dissociate completely and produce more of the ions.

Explanation:

hope this helps

A deep water wave with a 1.5-meter wavelength moves at a pace of 1.53 meters per second.

Wavelength In physics, a periodic wave's wavelength is the length over which its shape repeats. It is a characteristic of all spatial wave patterns, including standing waves and traveling waves. The distance between two adjacent crests, troughs, or zero crossings on the wave that correspond to successively in the same phase. The wavelength has a reciprocal relationship with the spatial frequency. When referring to wavelength, the Greek letter lambda () is usually used. When referring to modulated waves, their sinusoidal envelopes, or waves made by the interference of numerous sinusoids, the term wavelength is also occasionally employed.

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Answer:

because the car needs gas so why wouldnt it stop working

Explanation:

Granite and basalt are the two main forms of rock that make up the crust. The majority of the continental crust is made up of granite. Basalt is a type of volcanic lava rock that makes up the oceanic crust.

The outermost layer of a terrestrial planet is referred to as its "crust." All known life in the universe is contained in the thin, 40 km (25 mi) deep crust of our planet, which makes up just 1% of the planet's mass. The crust, mantle, and core are the three layers that make up the earth. Minerals and solid rocks make up the crust. The mantle, which lies below the crust, is composed primarily of solid rocks and minerals with some pliable regions of semi-solid magma. There is a heated, dense metal core in the center of the Earth.

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Answer:

Ummmm

Explanation:

Nnccldlsmnsns. Nsnsnsnkslsozlss snsnsksklsn snnsnsksk

Answer:

A  changes negative thinking patterns

Explanation:

therapy helps people to talk about their problems

The mechanical advantage of a machine is the factor by which it multiplies the force applied to the machine.

The required work done by you when lifting the stone through certain height is calculated to be 109.76 J.

The mass of the stone is given as 5.6 kg.

The height of the shelf is given as 2 m.

This work is just the negative of the product of the weight of the stone by the vertical displacement, which is equal to the change in the gravitational potential energy of the stone, as follows:

W = -ΔU = Uf - Ui = m g h = 5.6 × 9.8 × 2 = -109.76 J

Thus, the work done by you when lifting the stone through certain height is calculated by 109.76 J.

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Answer:

Here, the acceleration of shingles is a=g=9.8m/s2, Initial velocity of it is u=0m/s and distance traveled S=8.52mLet t be the required time for the shingles to reach ground. Using formula S=ut+at2/2we get,  8.52=0(t)+0.5(9.8)t2⟹ t=1.32s

Answer:

R and I will change, V will remain constant

Explanation:

:) I just did the quiz (and have screenshots for proof)

When the thickness of the wire in the circuit changes, R and I will also change, but V will remain constant. Option C is correct.

Ohm's law claims that the voltage across a conductor is directly proportional to the current flowing through it.

When all physical parameters and temperature are constant,Ohm's law claims that the voltage across a conductor is directly proportional to the current flowing through it.

This current-voltage connection may be expressed mathematically by Ohm's law as;

\(\rm V = IR \\\\\ \rm R= \frac{V}{I}\)

Resistance is inversely proportional to the current.When the thickness of the wire in the circuit changes, R and I will also change, but V will remain constant.

Hence, option C is correct.

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A boy spins a top on a table. he can increase the total energy of this

system by spinning the top faster. Option C

This is further explained below.

Generally, The whole end consumption of energy at a certain branch or variable is referred to as "Total Energy."

Total energy is distinguished from Final Energy Intensity by the fact that data pertaining to energy is entered directly; more specifically, the total energy is not stipulated as the product of an activity level and energy intensity.

This means that total energy is not the same as Final Energy Intensity.

In conclusion, On a table, a little child is seen spinning a top. By spinning the top at a quicker rate, he will be able to boost the system's overall energy output. Alternative C

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Answer:

\(a=3.17\ m/s^2\)

Explanation:

Given that,

Force force acting on the Skater's rocket is 220 N

Resistive force acting on it, F' = 30 N

Mass of Shelby, m = 60 kg

We need to find the acceleration of Shelby. Net force acting on Shelby is given by :

Net force = 220-30

= 190 N

The formula of net force is :

F = ma

a is acceleration of Shelby

\(a=\dfrac{F}{m}\\\\a=\dfrac{190}{60}\\\\a=3.17\ m/s^2\)

So, the acceleration of Shelby is \(3.17\ m/s^2\)

To find the center of mass of an irregular shape using

String- for hanging at the center

• A small mass - hung from the string

• A stand-holding up the string

• A pencil pinpointing the center

• A straight-edge- Identify the middle

Generally, a point indicates the mean location of the matter in a body or system.

In conclusion, the center of mass also indicates a point at which the body is most balanced under gravity.

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It's D.

Weight always points downward.

The normal force always points perpendicular to the surface.

Friction opposes motion, so it points in the direction opposite the direction in which the block is moving.

The gravitational force of attraction between them is 3.56 * 10⁻⁴ N

F = G*M1M2/d²,

where G = 6.67 * 10⁻¹¹ Nm²Kg⁻²,

M1 = 8000Kg and M2 = 1500 Kg,

F =  6.67 * 10⁻¹¹ * 8000 * 1500 / (1.5)² F = 3.56 * 10⁻⁴ N

The gravitational force of attraction between them is 3.56 * 10⁻⁴ N.

The universal gravitational law of Newton. According to this law, every body in the universe is attracted to every other body with a force that is inversely proportional to the square of the distance between them and proportional to the product of their masses.

Therefore, The gravitational force of attraction between them is 3.56 * 10⁻⁴ N.

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Answer: The pH of the solution after 50.5 mL of 0.100 M KOH has been added is 16.85.

The reaction between acetic acid and potassium hydroxide (KOH) is given by the equation:

CH3COOH + KOH → CH3COOK + H2O.

It can be observed that for every mole of KOH added, one mole of H+ from CH3COOH reacts with one mole of OH- from KOH to produce one mole of H2O. Therefore, after the addition of n moles of KOH, the number of moles of H+ remaining is (0.200 - n) moles (since 0.200 M is the initial concentration of acetic acid). On the other hand, the number of moles of CH3COOK produced is also n moles; thus the final concentration of CH3COOK is n/V (where V is the total volume of the solution).

The reaction produces a salt (CH3COOK), which is neutral. Therefore, the final pH is given by: pH = pKa + log([A-]/[HA]) where A- is CH3COOK and HA is CH3COOH.

To find the pH of the resulting solution after the following volumes of KOH have been added, we need to calculate the number of moles of KOH added, the number of moles of CH3COOK produced, the number of moles of CH3COOH remaining, and the total volume of the solution. Then we can use the Henderson-Hasselbalch equation above to find the pH.

Here are the calculations: Initial number of moles of CH3COOH = M × V = 0.200 × 0.100 = 0.020 moles. For each mole of KOH added, one mole of CH3COOH reacts with one mole of KOH to produce one mole of CH3COOK.Number of moles of KOH added Volume of KOH added (mL)Moles of KOH added0.02 0.00 (initial) 0.000.02 10.10 0.010.02 20.20 0.020.02 30.30 0.030.02 40.40 0.040.02 50.50 0.05Number of moles of CH3COOK produced = number of moles of KOH added = n moles. Concentration of CH3COOK produced = n/V = n/(Vinitial + V added) = n/(0.100 L + V added)

Number of moles of CH3COOH remaining = initial number of moles - number of moles of KOH added = 0.020 - n moles. Total volume of the solution after the addition of KOH = V initial + V added = 0.100 L + V added. We can then use the Henderson-Hasselbalch equation to find the pH: pH = pKa + log([A-]/[HA])where A- is CH3COOK and HA is CH3COOH.pKa of acetic acid = 4.76

Let's tabulate the values of n, [A-], [HA], and pH for each volume of KOH added: Number of moles of KOH added n (moles)Concentration of CH3COOK produced [A-] (M)

Number of moles of CH3COOH remaining [HA] (M)pH0.000.000.020.76 (initial)0.010.010.019.84 0.020.020.018.98 0.030.030.018.20 0.040.040.017.49 0.050.050.016.85.

The pH of the solution after 50.5 mL of 0.100 M KOH has been added is 16.85.

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The statement, "The Voyager 1 space probe can't change its own motion" is correct and true. The Voyager 1 space probe was launched by NASA in 1977, and since then it has traveled over 14 billion miles away from Earth. It's the most distant spacecraft from Earth.

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Answer:

2. Galaxy

5. Electromagnetic radiation

7. Particle Accelerator

Answer:

Roundworms:

The size of roundworms ranges from microscopic to as long as a meter long. Most roundworms have a hard, sharp lance on their head, and some have bristles on the head. Most of the roundworms are protected by an adaptable yet solid, furrowed body covering.  

Roundworms are very primitive living beings, having no respiratory or circulatory system of a host. They have an empty body with two openings at the closures. Be that as it may, the head isn't particular or recognizable to the unaided eye.  

Roundworms reproduce sexually and can finish their life cycle in immature puppies, however as the little pupps immunity system develops (for the most part by a half-year-old enough), the larval phases of the roundworm will become captured and will encyst (become encased in a sore) in the puppy's muscles. They can stay encysted in the pooch's tissues for a considerable length of time or years.

The outermost energy shell of the atom, where the electrons are situated in relation to the nucleus. the energy levels are-  1 (only"s"), 2 ("s","p"), 3 ("s","p","d"), 4 ("s", "p", "d", "f").

An atom's energy level is the set distance between its nucleus and any potential location for electrons. Additionally, energy levels might be compared to a staircase's steps.

Most major diseases, including heart disease, many types of cancer, autoimmune diseases like lupus and multiple sclerosis, and anemia, commonly manifest with a lack of energy (too few red blood cells). Another typical indicator of depression and anxiety is fatigue. Additionally, a side effect of several drugs is weariness.

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Answer:

Garis adalah elemen penting seni, didefinisikan sebagai tanda yang menghubungkan ruang antara dua titik, mengambil bentuk apa pun di sepanjang jalan. Garis paling sering digunakan untuk mendefinisikan bentuk dalam karya dua dimensi dan dapat disebut sebagai bentuk pembuatan tanda yang paling kuno, sekaligus paling universal.

Explanation:

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