The densities of the cannonball and the unknown liquid are 3.54kg/m³ and 2.686 kg/m³.
What is the buoyant force?When an object is fully or partially submerged in liquid, the vertical upward thrust is acting on the object, this force is called the buoyant force.
Salt Water exerts a buoyant force to the cannon ball = 124−89 = 35N, which equals the weight of water displaced.
The mass of water displaced is
W/g =35/10 =3.5 kg.
Since the density of salt water is 1kg/L, the volume displaced is 3.5L.
Therefore the density of the cannon ball is
=(124/10) /3.5 =3.54kg/L = 3.54kg/m³
The unknown liquid exerts a buoyant force of 124−30=94 N.
The density of this liquid is (94/10) /( 3.5 )=2.686 kg/liter = 2.686 kg/m³
Thus, the densities of the cannonball and the unknown liquid are 3.54kg/m³ and 2.686 kg/m³.
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What is the relation between electric intensity dn flux
The relation between the electric intensity and electric flux is that the electric flux is equal to the scalar product of electric flux intensity and vector area.
What is the relation between electric intensity and flux?The electric field is the field, which is surrounded by the electric charged. The electric field is the electric force per unit charge.
The intensity of this electric field is the number of electric field lines which are pass perpendicular to the unit element of fixed area.The flux of this electric field is the number of electric field lines which are pass normally to the fixed area.The electric flux can be given as,
[tex]d\phi =\vec E \;dA\cos \theta[/tex]
When angle is zero,
[tex]d\phi =\vec E \;dA\times1\\d\phi =\vec E \;dA[/tex]
Thus, the total flux is,
[tex]\phi=\oint_{}^{}\vec E.d\vec A[/tex]
Thus, the relation between the electric intensity and electric flux is that the electric flux is equal to the scalar product of electric flux intensity and vector area.
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Base your answers to questions 8 and 9 on the information and diagram below and on your
knowledge of physics.
A ray of monochromatic light (f- 5.09 x 10^14 Hz) passes from medium X into air. The angle of
incidence of the ray in medium X is 25°, as shown.
8. Using a protractor, measure and record the angle of refraction in the air, to the nearest degree.
9. Calculate the absolute index of refraction of medium X.
10. Base your answer to the following question on the information below.
A student plucks a guitar string and the vibrations produce a sound wave with a frequency of
650 hertz.
Calculate the wavelength of the sound wave in air at STP.
A ray of monochromatic light passes from medium X into air. The refractive index of medium X is 1.52.
What is Snell's law?It states that the ratio of sine of angle of incidence and angle of refraction is equal to the refractive index of second medium to the first medium.
sini/sinr = n₁/n₂
Given the angle of incidence i = 25 degrees, angle of refraction r =40 degrees, refractive index of air n₁ =1, then refractive index of medium X is
n₂ = 1 x sin 40/sin25
n₂ = 1.52
Thus, the refractive index of medium X is 1.52.
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Orginize it
What category would these go in??
Categorys : Radiation, conduction, and convection
Okay, so I have a project and we have to create a brochure to promote a planet and try to get people to visit. We also have to create a catchy slogan
I dunno if this is a good site to ask on, but I NEED HELP CREATING A SLOGAN FOR NEPTUNE. PLEAASE HELP :(
Explanation:
the tune of neptune is better thatbany other tune
hope it helps
Explain how to get a positive electric charge
Answer:
An electrical charge is created when electrons are transferred to or removed from an object. Because electrons have a negative charge, when they are added to an object, it becomes negatively charged. When electrons are removed from an object, it becomes positively charged
Czerski says the best reason that she can think of for studying physics has to do with how each of us has three life-support systems – what is meant by this? Explore this idea and identify where forensics fits into this three-life support system.
Answer:
The three life-support systems she talks about are, not just our own body, but civilization and the earth. All these things help us to survive. In forensics, this could be applied to finishing a case. Forensic’s life-support relies on, our knowledge, evidence, and technology.
A 2 kg ice cube is released from point A and slides on a frictionless track as shown in the figure. Determine the speed of the cube at points B and C.
According to the conservation of energy
Potential energy at any given instance is equal to the Kinetic energy as energy can neither be created nor be destroyedMass is 2kg=m
#A
h=5m
PE=mghPE
2(9.8)(5)10(9.8)98JNow
KE=98J1/2mv²=98J1/2×2v²=98Jv²=98Jv=√98v=9.4m/s#B
h=3.2m
PE:-
2(3.2)(9.8)6.4(9.8)62.7JNow
KE=62.7J1/2mv²=62.7v²=62.7v=√62.7v=7.9m/s#C
h=2m
PE
2(2)(9.8)4(9.8)39.2JNow
v²=39.2v=√39.2v=6.3m/sCan someone please answer this, ill give you brainliest Would be very appreciated.
Answer:
caves
Explanation:
Thermal stress causes the breaking of rocks caused by heating/cooling. You may choose deserts (due to heat) but if you think about it, there are not many rocks present compared to caves where it is more likely.
Water flows into a vertical cylindrical tank at the rate of 24 cubic ft per minute. If the radius of the tank is 4 ft, how fast is the surface rising?
per min= 24 cubic ft
radius= 4 ft
to find:how fast the surface rises.
solution:[tex]area = \pi {r}^{2} [/tex]
[tex]a = \pi \times {4}^{2} [/tex]
[tex]a = 50.24 \: {ft}^{2} [/tex]
[tex]v = 24 \: {ft}^{3} [/tex]
[tex] = \frac{24}{50.24} [/tex]
[tex] = 0.48[/tex]
therefore, the rising in the surface area is 0.48 feet per minute.
24 / 50.24 = 0.48 feet per minute
so the answer to your question is 0.48 feet per minute.
hope this helps you
Standing wave has nodes at the top
true or false
Answer:
false
Explanation: im smart
What is the energy of a photon with a wavelength of 245 nm
The energy of a photon with a wavelength of 245 nm will be 8.08 ×10⁻¹⁹ J. De Broglie relation is used to find out the energy.
What is wavelength?The distance between two successive troughs or crests is known as the wavelength. The peak of the wave is the highest point, while the trough is the lowest.
The relationship between the wave's wavelength,energy is;
[tex]\rm E = \frac{hc }{\lambda} \\\\ \rm E = \frac{6.6 \times 10^{-34} \times 3 \times 10^8}{245 \times 10^{-9}} \\\\ \rm E=8.08 \times 10^{-19}\ J[/tex]
Hence, the energy of a photon will be 8.08 ×10⁻¹⁹ J.
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a ball on a string is swung overhead in a horizontal circle with a radius of 0.66 m. what speed (in m/s) does the ball need to maintain for there to be a centripetal acceleration of 23 m/s2?
Answer:
The ball is moving in a horizontal circle.
The force acting towards the center of the circle is
F = M a = M * V^2 / R
a = V^2 / R simplifying equation
V = (a / R)^1/2 = (23 / .66)^1/2 = 5.90 m/s
What is the schwarzschild radius of a 10 solar mass black hole?.
Answer:
30km
Explanation:
Hope this helps and have a nice day :)
Three spheres, with masses indicated above, are
initially far away from each other, and the
gravitational potential energy of the three-sphere
system is zero. The spheres are then brought
together until each sphere is a distance r from
the other two, as shown above. What is the new
gravitational potential energy of the three-sphere
system?
Answer:
-5Gm^2/r
Explanation:
You don't have the graph, but I know what question you are talking about. The answer is above.
The new gravitational potential energy of the three-sphere system will be[tex]- \frac{5Gm^2}{r}[/tex].
What is gravitational potential energy ?The energy that an item has due to its location in a gravitational field is known as gravitational potential energy.
For the sphere 1 we have to perform no work. Hence, the work done is zero.
[tex]\rm W_1 = 0[/tex]
The mass m is to be brought to be infinity. Because there is potential at B due to mass m at A point .
[tex]\rm W_2 = \frac{-Gm}{r} \times m \\\\ W_2 =-\frac{Gm^2}{r}[/tex]
The B2 m at C is brought to infinity. For we have to do work . The gravitational potential energy for the mass 2 m is;
[tex]\rm W_3 = \frac{-Gm}{r} \times 2m\\\\ W_3 = \frac{-4Gm^2}{y} \\\\[/tex]
The new gravitational potential energy of the three-sphere system will be;
[tex]\rm W =W_1+W_2+W_3 \\\\\rm W =-0-\frac{Gm}{r}-4\frac{-Gm^2}{r^2} \\\\ W=\-\frac{-5Gm^2}{r^2}[/tex]
Hence, the new gravitational potential energy of the three-sphere system will be[tex]- \frac{5Gm^2}{r}[/tex].
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A 4.4 nC charge exerts a repulsive force of 36 mN on a second charge which is located
a distance of 0.70 m away from it. What is the charge (magnitude and sign) of the
second charge?
The magnitude and sign of the second charge will be + 8.6241×10⁻¹⁹ C. The principal of the Columb's law is used in the given problem.
What is Columb's law?The force of attraction between two charges, according to Coulomb's law, is directly proportional to the product of the charges and inversely proportional to the square of the distance between them.
Charges that are similar repel each other, whereas charges that are diametrically opposed attract each other.
They will repel, moving in opposite directions at the same speed. Because the magnitude and nature of the charge are the same.
The given data in the problem is;
q₁ is the charge 1 = 4.4 nC = 4.4 ×10⁻⁹ C
F is the repulsive force = 36 mN =36 ×10⁶ N
d is the distance = 0.70 m
The Coulomb force is found as;
[tex]\rm F = \frac{Kq_1q_2}{r^2}\\\\\ \rm 36\times 10^6 = \frac{9 \times 10^9 }{(0.7)^2} \times 4.4 \times 10^{-9} \times q_2\\\\\ q_2 = 8.6241 \times 10^{-19 } \ C[/tex]
Hence, the magnitude and sign of the second charge will be + 8.6241×10⁻¹⁹ C.
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What part of the sun is visible during a total solar eclipse.
Answer:
During total eclipse only Corona (Chromosphere) will be visible.
Explanation:
The outermost layer Corona is not visible during normal time. It is visible only when Moon hides the Sun, at that we can see the corona.
The diagram shows a positive charge moving in a magnetic field. a field of circles labeled b. there is a positively charged particle with a velocity vector pointing left labeled v. in which direction is the magnetic force acting on the charge? into the screen out of the screen up down
The magnetic force will be point upwards in perpendicular direction to the field.
What is the direction of magnetic force?The direction of the magnetic force on negative charge occurs in the opposite direction while it is directed to the positive charge direction.
From the given image and description, the positively charged particle with a velocity vector, v is pointing left, thus we can conclude that the magnetic force will be point upwards in perpendicular direction to the field.
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Answer:
c
Explanation:
the latent heat of fusion of a substance is the amount of energy associated with doing which of the following to 1 kg of the substance
A. Buring it completely
B. Raising its temperature 1 c
C. Boiling it at its boiling point
D Melting it at its melting point
Answer:Boiling at its boiling point
Explanation:
Daniel has been describing situations about being stalked by a government agency that is trying to recover information implanted in his brain. he will also babble incoherently, soil his clothing with excrement, and hold a statue-like pose for hours at a time. daniel can most likely be diagnosed with __________ schizophrenia. a. paranoid b. catatonic c. disorganized d. undifferentiated
He will also babble incoherently, soil his clothing with excrement, and hold a statue-like pose for hours at a time. Daniel can most likely be diagnosed with undifferentiated schizophrenia.
What is the worst type of schizophrenia?
Schizophrenia called hebephrenic is the most serious of all and affects more young individuals, between 15 and 25 years of age. The disorder is marked by symptoms such as disturbed affect, irresponsible and unpredictable behavior, disorganized thinking, and incoherent speech.
Undifferentiated schizophrenia — this is the case for patients who may develop some of the characteristics of the other types, but do not fit neatly into any of them.
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Answer:
undifferentiated schizophrenia
Explanation:
How do stars die?
Pls help
Answer: Stars die when their nuclear fuel runs out.
Explanation:
Answer: The final events of a star's life are determined by its mass. Massive stars swiftly burn through their hydrogen fuel, yet are hot enough to fuse heavier elements like helium and carbon.
Explanation:
In a car lift, compressed air exerts a force on a piston with a radius of 26.00 cm. This pressure is transmitted to a second piston with a radius of 43.0 cm. a) How large a force must the compressed air exert to lift a 2.33x103 N car? b) What pressure produces this force? Neglect the weight of the pistons.
Pascal's Law
[tex]\tt \boxed{\bold{\dfrac{F_1}{A_1}=\dfrac{F_2}{A_2}}}[/tex]
a. F₁/πr₁²=F₂/πr₂²
F₁/26²=2.33 x 10³/43²
F₁=8.51 x 10² N
b. P = F/A
P = 8.51 x 10²/π26²
P = 0.4 Pa
+
2.
2. Write the following chemical equations as
1. 4 Fe + 3 02->2 Fe2O3
5
The scientific name for this equation
Answer:
The representation of a chemical reaction in the form of substances is known as a chemical equation. The equation in which the number of atoms of all the molecules is equal on both sides of the equation is known as a balanced chemical equation.
The Law of conservation of mass governs the balancing of a chemical equation.
According to this law, mass can neither be created nor be destroyed in a chemical reaction and obeying this law total mass of the elements or molecules present on the reactant side should be equal to the total mass of elements or molecules present on the produc
matter is any thing that has mass and occupies space
Answer:
yes omg u are so handsome
Where do living things get the specific instructions for the proteins they make?
Answer:
large membrane enclosed structure
Is it accurate to say that galaxies take up most of the volume of space? Why or why not?
Answer:
ntergalactic space takes up most of the volume of the universe, but even galaxies and star systems consist almost entirely of empty space.
Explanation:
so to be exact galixes do make up most of the volume of space because galaxies are what make up space!
A 30 ohm resistor and a 20 ohm resistor are
connected in series with a 100 volt battery. What is
the electrical current that would pass through the
30 ohm resistor?
The current that would pass through the 30 ohms resistor is 2 A.
What is electric current?Electric current is the rate of flow of electric charge round a conductor.
To calculate the electric current that would pass through the 30 ohms resistor, we use the formula below
Formula:
I = V/Rt........... Equation 1Where:
I = Electric current passing through the 30 ohms resistorV = VoltageRt = Total or effective resistance of the resistors.From the question,
Given:
V = 100 voltsRt = (30+20) ohms (since both resistors are connected in series)Rt = 50 ohmsSubstitute these values into equation 1
I = 100/50I = 2 AHence, The current that would pass through the 30 ohms resistor is 2 A.
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Your driver's license is at risk of being cancelled if you: O A. Lied on the license application. O B. Are caught driving under the influence. O C. Cause an accident that injures another person. O D. Have more than three traffic violations in one year
Your driver's license is at risk of being cancelled if you have more than three traffic violations in one year. The correct option is D.
What is driving license?The license by the central government to an individual to travel on road by his own vehicle on terms and conditions to be strictly followed.
When a driver is moving with his vehicle and come across the traffic signal, he must follow them. If he violates the traffic signals more than three times, he will get his license cancelled.
Thus, your driver's license is at risk of being cancelled if you have more than three traffic violations in one year. The correct option is D.
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27. A rock is lying at the top of a 2 m high cliff and it possesses a potential energy of 80 J. What
is the mass of the rock?
A 1.32 kg
B) 2.85 kg
C 3.94 kg
D) 4.08 kg
FINAL PLEASE HELP !!!
Hi, I’m a sixth grader that REALLY needs help with her science homework. So if you could please tell me the answers to the questions then that would be great! (By the way the questions are in a random order so if you could tell me which one your talking about, that would be awesome) Thanks again!
Answer:
ok so the first one is (b) the next one is (c)
Explanation:
Find the equivalent resistance of this circuit.
Step-by-step explanation :
Here we just need to see the resistors which are connected in series combination. (Remember that you need not to use the potential difference in this question because we aren't asked to calculate the current).
As we know that,
Rs = R1 + R2 ... Rn>> Rs = 50 + 100
>> Rs = 150Ω
Therefore,
Resistance in series combination is of 150Ω.