The fraction of ice submerged when it floats in fresh water is 0.9.
Given that the density of water is 1000 kg/m³ and density of ice is 0.917 gm/cm³.
Converting gm/cm³ to kg/m³ we get, 0.917 gm/cm³ = 917 kg/m³
ρ₁ = 1000 kg/m³, ρ₂ = 917 kg/m³
V₁ = volume of water displaced = xV₂, V₂ = volume of ice submerged
Archimedes principle states that, the buoyant force on the ice will be equal to the weight of the water displaced. Using this principle in the above question.
ρ₁V₁= ρ₂V₂
V₁ = ρ₂V₂/ρ₁
xV₂ = 917 V₂/1000
x = 0.9
Thus, the fraction of ice submerged in water is 0.9.
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a.
To improve feelings about a poor test result, a student should
Beg the teacher for a second chance at the c. Ask their parents for assistance in persuading
test
the teacher to change a grade
b. Ask for an opportunity to earn extra creditd. All of these
Please select the best answer from the choices provided
A
B
ОООО
С
D
Answer:
Well, their are two answers in their. It would be Ask their Parent for assistance in persuading and Ask for an opportunity to earn extra credit:)
Explanation:
To improve feelings about a poor test result, a student should ask for an opportunity to earn extra credits. Hence, option D is correct.
How to handle disappointment at result?Remember that you are so much more valuable than a letter on a piece of paper. Your attitude, personality, and experience are things that future employers, coworkers, teachers, friends, and family are interested in. Even while practicing excellent self-care is always important, having a program in place will help you deal with any anxiety you may be experiencing in the future.
Start with the fundamentals, like eating healthily, Getting your five a day is a fantastic place to start Since it provides your body and brain with all the nutrition they require, and it can help you deal with any cortisol increases (stress). Additionally, ensure you get at least eight hours of sleep each night and consume six to eight glasses of water each.
To improve feelings about a poor test result, a student should ask for an opportunity to earn extra credits. Hence, option D is correct.
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A basketball and a bowling ball are relatively the same size or volume. Explain which ball is denser and why.
Answer:
The Bowling Ball is Denser.
Explanation:
If we consider both balls in terms of mass they are very different. Size and volume can be the same though.
What makes the mass? Think of what fills each of the balls.
A Basketball is filled with air, which weighs very little.
Meanwhile, a bowling ball is filled with coverstock, made up of plastic, urethane and resin. These materials weigh considerably more than air!
A 30 g block is placed on an inclined plane with a velocity of 3 m/s. The inclined plane is elevated at an angle of 40 degrees with the ground. The plane is 50 cm high. What is the velocity of the block when it reaches the bottom of the inclined plane?
Answer:
IT would be 10
Explanation:
np mark brainliest?
Calculate the speed of a proton after it accelerates from rest through a potential difference of 350 V.
The proton achieves a speed of 7.39 x 10^5 m/s after accelerating through a potential difference of 350 V.
To calculate the speed of a proton after it accelerates through a potential difference, we can use the equation:
v = √(2eV/m)
Where:
v is the velocity or speed of the proton,
e is the elementary charge (1.6 x 10^-19 C),
V is the potential difference (350 V), and
m is the mass of the proton (1.67 x 10^-27 kg).
Plugging in the values into the equation:
v = √(2 * (1.6 x 10^-19 C) * (350 V) / (1.67 x 10^-27 kg))
v ≈ √(9.12 x 10^-17 J / 1.67 x 10^-27 kg)
v ≈ √(5.47 x 10^10 m^2/s^2)
v ≈ 7.39 x 10^5 m/s
Therefore, the proton achieves a speed of 7.39 x 10^5 m/s after accelerating through a potential difference of 350 V.
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Explain why, in terms of forces, there is a risk of head injury when diving from this height. Suggest why the high divers would choose to enter the water feet first.
Answer:
Due to lower risk of injury or damage.
Explanation:
The high divers would choose to enter the water from the feet first because there is low risk of injury. The brain is the most important part of the body which very sensitive to any small injury. Small injury to brain leads to big problems in life. High divers can reach speeds of nearly 60 mph and enters about 28m into the water in about three seconds which can damage the head region if comes in contact with the ground so this is the reason the high divers avoid of entering in the water through their heads and choose entering through their feet.
5. The force of gravity acting on the object is object’s ______________.
I think it's mass...
The mass of an object refers to the amount of matter that is contained by the object; the weight of an object is the force of gravity acting upon that object. Mass is related to how much stuff is there and weight is related to the pull of the Earth (or any other planet) upon that stuff.
Which type of resource is solar energy ?(a) Exhaustible resource (b) Soil resource(c) Biotic resource(d) Non-exhaustible resourcencit
The solar energy is Non-exhaustible resource. Hence, option (d) is correct.
What renewable resource?A natural resource that can be replenished to replace the portion used up by usage and consumption is known as a renewable resource, also known as a flow resource. This replenishment can occur naturally through reproduction or through other recurring processes in a limited amount of time on a human time scale.
The natural environment of the Earth and the main elements of its ecosphere are renewable resources. A resource's sustainability can be determined in large part by looking at its life-cycle assessment.
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does the fact that active euthanasia is currently illegal mean that it isn’t a question physicians need to concern themselves with? explain your view.
Active euthanasia is now prohibited in a number of nations, but this does not mean that doctors do not need to be concerned about it..
In truth, euthanasia is a difficult and divisive topic, and it is crucial for doctors to be informed about it in order to give their patients the best treatment possible
Patients with chronic or fatal conditions that are excruciatingly painful and uncomfortable are common among the patients whom doctors treat. These patients occasionally express a wish to end their life so they won't have to endure any more pain. This puts doctors in a challenging situation since they must balance their responsibility to give their patients the best treatment possible with their own needs.
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if a needle had to be removed from a syringe, what would be the safest way to do so based on safe sharps work practices? remove the needle by twisting off the syringe directly by hand ask a colleague to hold the syringe while you twist the needle off by hand recap the needle with a forceps, then remove the needle from the syringe by hand use a needle box equipped with a needle removal device that permits the needle to fall directly into the needle box or sharps container when removed
The safely removing a needle from a syringe based on safe sharps work practices is to use a needle box equipped with a needle removal device that permits the needle to fall directly into the needle box or sharps container when removed.
This method ensures that the needle is immediately disposed of in a safe manner, reducing the risk of accidental needlestick injuries. It is important to never remove the needle by twisting off the syringe directly by hand, as this can cause the needle to become dislodged and potentially cause harm. Similarly, asking a colleague to hold the syringe while you twist the needle off by hand also poses a risk. Recapping the needle with forceps before removing it by hand is also not recommended, as it increases the risk of needlestick injuries. Therefore, using a needle box equipped with a needle removal device is the safest and most effective method for removing a needle from a syringe.
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What impact parameter will give a deflection of 1 degree for an alpha particle of energy 7. 7 MeV incident on a gold nucleus (Z = 79)
The impact parameter that will give a deflection of 1 degree for an alpha particle of energy 7.7 MeV incident on a gold nucleus (Z = 79) is 9.38 x \(10^{-14}\) m.
The formula used to calculate impact parameter (b) is given by;
`b = [(z1*z2*\(e^2\))/(4πε0m\(v^2\))](cot(θ/2))`
Where, z1 and z2 are the atomic numbers of the interacting nuclei, e is the charge of an electron, ε0 is the permittivity of free space, m is the mass of the alpha particle, v is the velocity of the alpha particle, θ is the scattering angle.
The angle of deflection is 1 degree which is equal to 0.01745 radians. Given that an alpha particle of energy 7.7 MeV is incident on a gold nucleus (Z = 79).
The mass of the alpha particle (m) = 4u
Energy of the alpha particle (E) = 7.7 MeV
Charge of the alpha particle (e) = 2e
Atomic number of the gold nucleus (Z) = 79
Velocity of the alpha particle (v) can be calculated using the formula for kinetic energy given by;
`K = (1/2)\(mv^2\)
`Where, K is the kinetic energySubstitute the values to find v;`7.7*\(10^6\) eV = (1/2) * 4u * \(v^2\)``v = \(\sqrt{[(2*7.7*10^6)/(4*931.5*10^6)]`}\)
`v = 0.0132 m/s`
Now substitute all the known values in the formula for impact parameter;
b = [(z1*z2*\(e^2\))/(4πε0\(mv^2\))](cot(θ/2))`
= \([(79*2*1.6*10^{-19})^2/(4\pi *8.85*10^{-12}*4*3.14*0.0132*4*1.66*10^{-27})](cot(0.008725))\)`
= 9.38*\(10^{-14} m\)`
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a new star has been discovered that has a peak electromagnetic wavelength of 475.00 nm. what is the star's surface temperature? k
The star's surface temperature is approximately 6100 K.
Peak electromagnetic wavelength of 475.00 nm, we can make use of Wien's displacement law which relates the peak wavelength of a black body to its temperature as follows;
λmaxT = 2.898 × 10^-3
where λmax is the peak wavelength and T is the surface temperature of the black body.
Therefore, to find the surface temperature of the star we can substitute the values into the equation as follows;
λmaxT = 2.898 × 10^-3T
= 2.898 × 10^-3 / λmax
= 2.898 × 10^-3 / 475.00 x 10^-9
= 6100 K.
Therefore, the star's surface temperature is approximately 6100 K.
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how is physics related to chemistry and biology
what happens if two vehicles reach at the same time an intersection with four-way stop signs?
If two vehicles arrive at the same time with four-way stop signs and are facing each other (one going straight and the other turning left), the vehicle going straight typically has the right of way. The turning vehicle should yield to the vehicle going straight before making their turn.
In some cases, if there is confusion or uncertainty about who arrived first, drivers may use non-verbal communication, such as making eye contact or using hand gestures, to coordinate and determine who should proceed first. It's important to exercise caution, patience, and communicate effectively to avoid potential collisions and ensure a smooth flow of traffic.
It's worth noting that traffic rules and regulations may vary by jurisdiction, so it's always advisable to familiarise oneself with the specific local laws and guidelines governing four-way stops and intersections in the region where one is driving.
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Jessica jogs on a path that is 25 kilometers long to get to the park that is south of the jogging . If it takes Jessica 2.5 hours then
The speed of Jessica as she jogs on a path that is 25 kilometers long in 2.5 hours is 10 km/hr.
What is the speed of a moving body or object?The speed of a moving body or object is the distance covered by the moving body over a given period of time.
Mathematically, speed is expressed as follows;
speed = distance covered/time takenThe units of speed include; km/hr/ mi/hr, m/s, etc.
Considering the information provided about the movement of Jessica:
The distance or path length covered by Jessica = 25 kilometers
Time taken to cover the distance = 2.5 hours
Speed of Jessica during the jogging period = 25 km/2.5 hrs
Speed of Jessica = 10 km/hr
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what was the smallest value of d0, for which you were still able to obtain a focused image on the screen? use the lens equation to explain why
The smallest value of the object distance (d0) for which a focused image can be obtained on the screen is determined by the lens equation:
\(1/d0+1/di=1/f\)
where \(d0\) is the object distance, \(di\) is the image distance, and \(f\) is the focal length of the lens.
To obtain a focused image, the image distance (di) must be positive and real. This condition is met when the object distance (d0) is greater than the \(f\) of lens.
Hence smallest value of \(d0\) for which image can be obtained equals the focal length of the lens, f. For converging lens, having a positive \(f\), the object placement must be at distance greater than the \(f\) of lens. For a diverging lens, having negative \(f\), object must be placed closer to lens.
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In school, Brendan has been conditioned to get up from his seat every time he hears the school bell ring. Brendan was sitting at McDonalds eating with friends, when a loud sound similar to the school bell rang from the kitchen. Without even thinking, Brendan jumped out of his seat at McDonalds.
Label the following for this scenario:
a. Unconditioned Stimulus (US)_
b. Conditioned Stimulus (CS)_
c. Unconditioned Response (UR)_
d. Conditioned Response (CR)_
Answer:
US: the bell ringing
CS:get up when hearing the bell
UR:standing after hearing the bell
CR:hearing the bell in mcdonalds and standing up
Explanation:
US: the bell ringing
CS: get up when hearing the bell
UR: standing after hearing the bell
CR: hearing the bell in Mcdonald's and standing up
Who's eligible for the third stimulus test?commonly, a taxpayer will qualify for the overall quantity if they have an adjusted gross income of up to $ 75,000 for singles and married individuals submitting a separate go back, as much as $112,500 for heads of family, and as much as $150,000 for married couples submitting joint returns and surviving spouses.
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Find the height of a cylinder with a volume of 220inand a radius of 3 inches. Round
your answer to the nearest hundredth.
07.78 inches
6.93 inches
5.00 inches
9.84 inches
\(\huge{ \mathcal{ \underline{ Answer} \: \: ✓ }}\)
Given :
volume = 220 in³radius = 3 inSolution :
\( \large\boxed{ \mathrm{volume = \pi {r}^{2}h }}\)
\(220 = \dfrac{22}{7} \times 3 \times 3 \times h\)\( \dfrac{220 \times 7}{22 \times 3 \times 3} = h\)\( \dfrac{10 \times 7}{3 \times 3} = h\)\(h = \dfrac{70}{9} \)\( \boxed{h \: = 7.78 \: \: in}\)_____________________________
\(\mathrm{ \#TeeNForeveR}\)
Answer:
0.078 inches
Explanation:
The volume of a cylinder is \(V=\pi r^{2} h\). \(r\) is the radius of the cylinder, \(h\) is the height of the cylinder, and \(V\) is the total volume.We can divide both sides by \(9\pi\) to isolate the height. We now have \(\frac{220}{9\pi }=h\).We can plug in \(220\) for the value of \(V\), and insert 3 as \(r\). Now, we have \(220 = \pi (3^2)(h)\).We can simplify the right side by finding the value of \(3^2\), which is \(3*3\), or \(9\). We now have \(220 = 9\pi h\).Divide both sides by \(9\pi\) so we can isolate the height! We now have \(\frac{220}{9\pi }=h\).It would be best to use a calculator at this point. Plug the above equation into a calculator; otherwise, replace \(\pi\) with \(3.14\) and simplify the fraction. You should get about \(07.7809...\) which we can round to the nearest hundredths (since this is Geometry, I am assuming you know how to round).Our final answer is \(07.78\) inches.Hopefully this was of use!
why might the surface brightness of ring particles and small moons orbiting uranus or neptune depend on whether or not the planet has a magnetic field?
The reason why the surface brightness of ring particles and small moons orbiting Uranus or Neptune depend on whether or not the planet has a magnetic field is due to the interaction between the planet's magnetic field and the charged particles in its environment.
The interaction between the planet's magnetic field and the charged particles in its environment results in the particles being trapped and accelerated along the magnetic field lines. If the planet does not have a magnetic field, the charged particles would not be trapped in the planet's environment, and thus the surface brightness of the ring particles and small moons would not depend on whether or not the planet has a magnetic field.Ring particles and small moons' surface brightness relates to Uranus and Neptune because the interaction between the planet's magnetic field and the charged particles in its environment affects the way the ring particles and small moons scatter light. If the charged particles are trapped in the planet's magnetic field, they can cause the ring particles and small moons to emit their own light, which results in the increased surface brightness.
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what is the si unit of loudness of sound
Answer:
We know that loudness is directly proportional to amplitude and SI unit of amplitude is Decibel So unit of loudness is decibel
Answer:
volume
Explanation:
the si unit of sound is volume
A student stands at the GP edge of a cliff and throws a stone horizontally over the edge with a speed of vi 5 18.0 m/s. The cliff is h550.0maboveabody of water as shown in Fig- ure P4.29. (a) What are the coordinates of the ini- tial position of the stone
A student standing at the edge of a cliff throws a stone horizontally with an initial speed of 18.0 m/s. The cliff has a height of 550.0 m above a body of water. The question asks for the coordinates of the stone's initial position.
Since the stone is thrown horizontally, its initial vertical velocity is zero. Therefore, the stone's initial position can be determined by considering only the horizontal motion. We can use the equation for horizontal motion: x = v*t, where x is the horizontal distance, v is the horizontal velocity, and t is the time.
In this case, the stone is thrown horizontally with a speed of 18.0 m/s, so the horizontal velocity (v) is 18.0 m/s. The time (t) can be calculated using the equation h = 0.5gt^2, where h is the vertical height (550.0 m) and g is the acceleration due to gravity (approximately 9.8 m/s^2).
Rearranging the equation for time, we have t = sqrt(2*h/g). Substituting the given values, we can find the time taken for the stone to fall from the cliff.Finally, we can calculate the horizontal distance (x) by multiplying the horizontal velocity (v) by the time (t) obtained. This will give us the coordinates of the initial position of the stone.
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A 402.89 kg van traveling at 20.54 m/s rear-ends an 704.44 kg compact car going 26.62 m/s. If the two vehicles stick together what will be their new speed?
Given data
*The given mass of the van is m = 402.89 kg
*The initial speed of the van is u_1 = 20.54 m/s
*The given mass of the compact car is M = 704.44 kg
*The initial speed of the compact car is u_2 = 26.62 m/s
The formula for the new speed of both the vehicles is given by the conservation of momentum as
\(\begin{gathered} p_i=p_{f_{}} \\ mu_1+Mu_2=(m+M)v_{}_{} \\ v=\frac{mu_1+Mu_2}{(m+M)} \end{gathered}\)Substitute the known values in the above expression as
\(\begin{gathered} v=\frac{(402.89\times20.54)+(704.44\times26.62)}{(402.89+704.44)} \\ =24.40\text{ m/s} \end{gathered}\)Hence, the new speed of both the vehicles when they stick together is v = 24.40 m/s
Cuando una persona sube y baja una escalera, Cuanto vale su desplazamiento y cual es la medida de su trayectoria.
Answer:
Primero, definimos el desplazamiento como la distancia entre la posición final y la posición inicial.
Así, si comenzamos abajo, luego subimos la escalera, y luego bajamos, la posición final y la posición inicial serán la misma
por lo que el desplazamiento es igual a cero.
La medida recorrida es el espacio total recorrido.
Es decir, si entre el principio y el final de la escalera hay una distancia D.
La persona que sube y baja, recorre esta distancia dos veces.
Entonces cuando una persona sube y baja la escalera, la medida de su trayectoria será 2*D.
Calculate the weight of a book if it has a mass of 0. 6kg
Answer:
a) given that mass=0.6kg,distance of stretching from equilibrium position x=0.9m from new ton's second law,F=ma where a is acceleration of the body.Therefore,force on the spring -mass syste
Explanation:
hope it helps
How much time does it take to use 300 W of power to do 1800 J of work? Round your answer to the nearest whole
number
The time is
S.
Done
Intro
Answer:
6 seconds
Explanation:
If the atomic mass of neon is 20 amu, how much neon would be needed to have an avogadro's number of neon atoms?
By Avogadro's number, the mass of Neon atom is 20 grams.
We need to know about Avogadro's number to solve this problem. Avogadro's number is the number that explains how many carbon atoms are in one mol. The Avogadro's number is
Na = 6,02 × 10²³ atoms / mol
From the question above, we know that
Mr = 20
N = 6,02 × 10²³ atoms
By using Avogadro's number, we can calculate how much Neon atoms
N = n . Na
6,02 × 10²³ = gr / Mr . 6,02 × 10²³
gr / 20 = 1
gr = 20 grams
Hence, the mass of Neon atom is 20 grams.
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What does Newton's law all about?
Which is a longer distance; 150 inches or 13 feet?
Un objeto de 200 gramos está amarrado del extremo de una cuerda y gira describiendo un círculo horizontal de 1.20 m de radio a razón de 3 rev/seg la tensión en la cuerda es?
Answer:
La tensión es 85.3 N.
Explanation:
Cuando el objeto gira en dirección horizontal, la sumatoria de fuerzas se puede calcular usando la segunda ley de Newton:
\( \Sigma F_{x} =ma_{c} \)
\( T = ma_{c} \)
Dado que el movimiento es horizontal, el peso (que está en el eje y) no contribuye en la sumatoria de fuerzas en el eje x. Por lo que la única fuerza actuando sobre el objeto en la dirección del movimiento es la tensión.
En donde:
m: es la masa del objeto = 200 g = 0.200 kg
\(a_{c}\): es la aceleración centrípeta
La aceleración centrípeta viene dada por:
\(a_{c} = \omega^{2} r\)
En donde:
ω: es la velocidad angular del objeto = 3 rev/s
r: es el radio = 1.20 m
Entonces, la tensión es:
\(T = m\omega^{2} r = 0.200 kg(3\frac{rev}{s}*\frac{2\pi rad}{1 rev})^{2}*1.20 m = 85.3 N\)
Por lo tanto, la tensión es 85.3 N.
Espero que te sea de utilidad!
in a region of space where gravitational forces can be neglected, a sphere is accelerated by a uniform light beam of intensity 8.0 mw/m2. the sphere is totally absorbing and has a radius of 1.0 microns and a uniform density of 4500.0 kg/m3. what is the magnitude of the sphere's acceleration (in m/s2) due to the light?
The answer for the magnitude of the sphere's acceleration (in m/s²) due to the light is 4.44×10⁻⁹ m/s²
Newton's second law must be applied in order to determine the acceleration.
F = m×a and a = F/m.
We use the defined pressure and the radiation pressure for an absorbent surface to determine the force.
P=I/c absorbent surface
P = F / A
F / A = I / c
F = I A / c
A circle's total area is
A = π×r²
We swap out
F = I π r² / c
Let's compute
F = 8.0×10⁻³ π (1.0×10⁻⁶)²/3×10⁸
F = 8.375×10⁻²³ N
To measure Density
ρ = m / V
m = ρ V
m = ρ (4/3 π r³)
m = 4500 (4/3 π (1×10⁻⁶)³)
m = 1,885×10⁻¹⁴ kg
Now let's determine the acceleration.
a = 8.375×10⁻²³ / 1.885×10⁻¹⁴
a = 4.44×10⁻⁹ m/s² absorbent surface
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Two engines do same work in different time intervals.Which will have more power?
Answer:
who done work in less time will have more power
Explanation: