The gravitational force drawing them together is 2.5 × 10⁻¹² N, if the masses of objects are 2 kg and 3 kg and they are separated by 4 meter distance.
Mass of the first object, m₁ = 2 kg
Mass of the second object, m₂ = 3 kg
The distance between them, d = 4 m
Universal gravitational constant, G = 6.67 × 10⁻¹¹ Nm²/kg²
The gravitational force is formulated as, F = Gm₁m₂/d²
F = (6.67 × 10⁻¹¹)(2 × 3)/4²
F = 2.5 × 10⁻¹¹ N
This force is an attractive force and it will be experienced by both the object.
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what is the intermolecular force of attraction for libr?
The intermolecular force of attraction for LiBr is the Electrostatic force of attraction.
There are two ions in the compound LiBr (Lithium Bromide). These are
Lithium-ion ([tex]Li^{+1}[/tex]).Bromide-ion ([tex]Br^{-1}[/tex]).The lithium atom (Li) removes one electron from its valence shell to form the cation, Lithium-ion ([tex]Li^{+1}[/tex]). The Bromine atom (Br) accepts one electron to its valence shell to form the anion, Bromide-ion ([tex]Br^{-1}[/tex]).
Cations are positively charged and anions are negatively charged.
It is known that opposite charge always attracts each other. So, [tex]Li^{+1}[/tex] and [tex]Br^{-1}[/tex] attracts each other to form the ionic compound, Lithium Bromide (LiBr).
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A certain first order reaction between two gases
occurs at 389 K with a half-life of 24 hours. How
much time is required to drop the pressure of one of
the gases from 2.0 atm to 0.25 atm at 389 K?
A) 8 hours B) 72 hours
C) 192 hours D) 288 hours
The time required to drop the pressure of one of the gases from 2.0 atm to 0.25 atm at 389 K is 288 hours, or Option (D).
For a first order reaction, the change in pressure of a gas is proportional to its initial concentration and to the rate constant of the reaction. The half-life of a first order reaction is defined as the time required for the concentration of a reactant to decrease to half its initial value.
The rate constant (k) of a first order reaction can be related to its half-life (t1/2) as follows:
k = 0.693 / t1/2
We can use this relationship to find the rate constant for our reaction:
k = 0.693 / 24 hours = 0.0289 h^-1
Next, we can use the rate constant to find the time required for the pressure of one of the gases to decrease from 2.0 atm to 0.25 atm:
P = P0 * e^(-kt)
ln(P/P0) = -kt
-t = ln(P/P0) / k
where P0 is the initial pressure, P is the final pressure, t is the time, and e is the base of natural logarithms.
Plugging in the values, we get:
-t = ln(0.25/2.0) / 0.0289 h^-1
t = 288 hours
Therefore, the time required to drop the pressure of one of the gases from 2.0 atm to 0.25 atm at 389 K is 288 hours, or Option D).
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8. [2.0 pts) (Step C4 : foil pieces not initially touching) (a) Based on your observation, draw the distribution of top and bottom charges for both pieces of aluminum foil when: (1) The charged PVC pipe is nearby (ii) The charged PVC pipe has been moved away (b) Explain the initial and final charge distributions drawn above.
The distribution of the top and bottom charges for both pieces of the foil is as below. The initial charge distribution is determined by the movement of electrons from the charged PVC pipe to the aluminum foil pieces.
(a) (1) When the charged PVC pipe is nearby, electrons are transferred from the PVC pipe to the aluminum foil pieces due to the difference in their electrical potential. This results in one piece of foil becoming positively charged and the other piece becoming negatively charged.
(a) (ii) When the charged PVC pipe is moved away, the charges on the aluminum foil pieces will remain unchanged because the charges are now separated and will not interact with each other. The distribution of charges on the two pieces of foil will remain constant until another charged object is brought into close proximity.
(b) The initial charge distribution is determined by the movement of electrons from the charged PVC pipe to the aluminum foil pieces, resulting in one piece becoming positively charged and the other negatively charged. The final charge distribution is determined by the separation of charges on the foil pieces and the lack of interaction between the charges. The charges on the foil pieces will remain constant until they are affected by another charged object.
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6 Newton's third law involves two quantities which are equal in size and opposite in direction. What is the unit for these two quantities? AJ B. m/s2 C - N D W ?
The unit of the two quantities used in the Newton's third law is Newton, which is denoted by N.
Newton's third law states that there is equal and opposite reaction for every action, In other words, There is an equal reaction for every force, but in the direction opposite to direction of the force. These forces are the quantities which are used in this law. The SI unit of reaction and force is Newton, which is equal to kg-m/s². It is denoted by N. It is formulated as: Force = mass × Acceleration.
F = m × a
Hence the correct option is C.
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Two carts (100 g and 150 g) on an air track are separated by a compressed spring. The spring is released. Represent the process with a momentum bar chart (a) with one cart as the system and (b) with both carts as the system. (c) Write expressions for all of the physical quantities you can from this
Answer:
The momentum bar chart is a tool used to track the changes in momentum of objects in a system over time.
(a) With one cart as the system:
Initial Momentum: m1v1
Final Momentum: m1v1'
Change in Momentum: m1(v1' - v1)
(b) With both carts as the system:
Initial Momentum: m1v1 + m2v2
Final Momentum: m1v1' + m2v2'
Change in Momentum: (m1 + m2)(v1' + v2' - v1 - v2)
The above expressions represent the changes in momentum of the carts, where m1 and m2 are the masses of the carts, v1 and v2 are their initial velocities, and v1' and v2' are their final velocities. The expressions can be used to calculate the net force acting on the carts using Newton's second law, F = Δp/Δt, where Δp is the change in momentum and Δt is the change in time.
Physical quantities that can be calculated from this scenario include the initial and final momentum of the carts, the change in momentum, the net force acting on the carts, and the acceleration of the carts.
Frequency is measured in hertz. Which option best describes hertz?
Responses
the number of vibrations produced per minute
the number of waves that pass a certain point within a certain time
the length of a wave over a specified length of time
the distance that one cycle of a wave will travel
Frequency is measured in hertz and it is described by the number of waves that pass a certain point within a certain time
What is frequency?The number of waves that pass a fixed point in a unit of time is known as frequency in physics.
It is also the number of cycles or vibrations that a body in periodic motion experiences in a unit of time.
When a body in periodic motion moves through a series of events or locations before returning to its initial state, it is said to have experienced one cycle or one vibration. A simple harmonic motion is also seen under angular velocity.
If one cycle or vibration takes half a second to complete, the frequency is two per second.
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what is the force on the 1.0 nc charge in the middle of the figure shown below due to the other four charges? give your answer in component form and in magnitude and direction.
The net force on charge of 1 nC is, [tex]F = 0\ \hat{i} + 1.02 \times 10^{-3}\ \hat{j}[/tex] Newtons.
Electric force on a charge q₁ due to charge q₂ is,
[tex]F = \dfrac{kq_1q_2}{r^2}[/tex],
where r is the distance between the charges and k is the permittivity of free space.
The other four charges are of magnitude 2 nC.
The diagonals of a square are equal. Hence the magnitude of forces due to all other four charges is same.
Now, talking about direction of forces, the force, for the positive 2 nC charge its towards the negative and for negatives too it's towards the negative charge.
Now, the y- component of forces cancel away.
The x-component in negative x-direction adds up.
[tex]F = 4 \times \dfrac{k(2)(1)}{\dfrac{1}{\sqrt2}^2} \times 10^{-9-9+4} \times sin(45^0)[/tex]
[tex]F = 1.02 \times 10^{-3}[/tex]
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When traveling twice as fast your kinetic energy is increased _______.
When traveling twice as fast your kinetic energy is increased: by four times
What is kinetic energy?It is the energy possessed by a body due to its relative motion. It is usually expressed in Joules (J).
The kinetic energy depends on velocity, so when the velocity increased twice the kinetic energy increase 2^2= 4
The kinetic energy formula is:
K.E. = 1/2 * m * v²
Where:
v = speed
m = mass
Joules = Kg m²*s²
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a block of unknown material has a mass of 882.2 g. it measures 5.29 cm x 4.45 cm x 3.34 cm. what is the density of the block? give answer in units of g/cm3 and remember correct significant figures.
Answer:
The density of a material can be found by using the formula:
Density = Mass / Volume
The volume of the block can be found by multiplying its three dimensions:
Volume = 5.29 cm x 4.45 cm x 3.34 cm = 81.99 cm^3
So,
Density = 882.2 g / 81.99 cm^3
= 10.77 g/cm^3 (rounding to two significant figures)
using ohm's law and ignoring units, if the voltage is 10 and the resistance of the circuit is 2, what is the current flow across the resister?
Using Ohm's law, the current flow across the resister is 5 Ampere, if the voltage across the resister is 10 volts, and the resistance is 2Ω.
Voltage across the resistor, V = 10 volts
Resistance of the resistor, R = 2Ω
Let the current flow in the resistor, = I
According to Ohm's law, current flow in a conductor is directly proportional to the voltage across it. The ratio of the voltage and current is a constant called "Resistance".
I ∝ V
R = V/I
I = V/R
I = 10/2
I = 5 A
So the current flow across the resister is 5A.
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How high up did the waitress lift the 21.96 N tray when she did 97.91 J of work on it for 3 s? Please help!! fast!
It will be like over 2.4353m
a car rounds a curve of radius 50m. during normal conditions, the force of friction on the 500 kg car is 4500n. determine the maximum speed at which the car can safely negotiate the curve without slipping.
The maximum speed at which the car can safely negotiate the curve without slipping is 450 m/s
The formula v = (Ff / m) x r, where
The maximum speed of the vehicle can be calculated using the friction force Ff, mass m, and curve radius r.
Calculating maximum speed is done as follows:
= (4500N/500kg) x 50m
= 450 m/s
The force produced when two sliding surfaces come into contact with one another is known as the frictional force.
The texture of the surface and the amount of force holding the two surfaces together both have a significant impact on this force.
For instance, the weight of the first thing will exert frictional force when it is placed on top of another object.
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Physics
1. A car travels from a stopped position to a velocity of 88 miles per hour east in a time of 6 seconds. Determine the acceleration of the car.
2. airplane is moving across the sky at a constant speed of 350 miles per hour at an altitude of 20,000 feet.
a) Make a model (picture or diagram) explaining the forces working on the plane as it moves across the sky.
b)Explain why the plane does not move towards the surface of the earth.
c) If the speed of the plane slows down to zero, explain what will happen to the plane and why?
3. Determine which of the following is has the fastest speed:
A cat with a speed of 4m/s or a dog running with a speed of 3.5 km/hr.
4. A student travels from Angeles to New York city. If his watch says 12:15 pm at tale off from Los Angeles and lands in
New York at 3:45 pm. The distance travelled is 3,450 kilometers. Determine the average speed of the plane in m/s.
Answer:
sorry i am late
Explanation:
To determine the acceleration of the car, we can use the formula: acceleration = (final velocity - initial velocity) / time. In this case, the initial velocity is 0 (the car is stopped), the final velocity is 88 mph, and the time is 6 seconds. So: acceleration = (88 - 0) / 6 = 14.67 mph/s.
a) The forces working on the plane as it moves across the sky include thrust from the engines, lift generated by the wings, weight (or gravity), and drag (air resistance).
b) The plane does not move towards the surface of the earth because the lift generated by the wings is greater than the weight (or gravity) pulling the plane down.
c) If the speed of the plane slows down to zero, the plane will begin to fall towards the surface of the earth. This is because the lift generated by the wings depends on the speed of the plane and at zero speed, there is no lift to counteract the weight of the plane.
To determine which of the two options has the fastest speed, we need to convert the speed of the dog to m/s. 3.5 km/hr is equivalent to 0.978 m/s. Therefore, the cat (with a speed of 4 m/s) is faster than the dog.
To determine the average speed of the plane, we can use the formula: average speed = distance traveled / time taken. The distance traveled is 3,450 kilometers, and the time taken is 3 hours and 30 minutes (or 3.5 hours in decimal form). So: average speed = 3,450 / 3.5 = 985.71 km/h. To convert this to m/s, we can multiply by 1000/3600 = 0.277 m/s. So the average speed of the plane is 0.277 m/s
Simplify the following expression in terms of the dimensions mass, length, and time given by [M], [L], and [T].
[M][L]^2/[t]^2 . [T]/[L] = ?
a. [M] [L]/[T]^2
b. [M] [L]/[T]
c. [T][L]/[M]
d. [M] [T]/[L]
e. [M][L]^2/[T]
The required solution of the dimensional formula is calculated to be [M][L]/[T]. Correct option is B.
Dimensional analysis is the practice of checking relations between physical quantities by identifying the dimensions of the physical quantities.
If Q is the unit of a derived quantity represented by Q = M^a L^b T^c, then M^a L^b T^c is called the dimensional formula and the exponents a, b, and c are called the dimensions.
The given expression is the multiplication of dimensional formulae of two different physical quantities.
We know that,
Mass m = [M]
Length l = [L]
Time t = [T]
The given expression to solve is,
[M][L]²/[T]² . [T]/[L] = [M][L]/[T]
Thus, the required solution of the given expression is [M][L]/[T].
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which is a possible unsafe consequence of using fin material that is too thin or weak for your rocket and the motor that you are using?
Using fin material that is too thin or weak for a rocket and its motor can result in fin failure, trajectory instability, motor damage, and loss of control.
Fin failure: Thin or weak fins may not be able to withstand the aerodynamic forces and stresses during launch, which can result in fin failure.
Trajectory instability: Weak or poorly designed fins can cause trajectory instability, making the rocket unpredictable and potentially dangerous.
Motor damage: In some cases, using weak or improperly designed fins can lead to excessive stress on the motor casing, causing damage and potentially leading to a motor failure.
Loss of control: If fins fail or the rocket becomes unstable, it may become uncontrollable and fall back to the ground, potentially causing damage or injury.
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a copper cube has a mass of 80.7 g .find the edge length of the cube. (the density of copper is 8.96 g/cm3 , and the volume of a cube is equal to the edge length cubed.)
The edge length of the cube is approximately 0.11 meters.
The edge length of a cube can be found by using the formula for the volume of a cube and the density of the material it is made of.
Given that the density of copper is 8.96 g/cm³, the volume of a cube with a mass of 80.7 g can be calculated as:
V = m/р
where V is the volume, m is the mass (80.7 g), and ρ is the density (8.96 g/cm³).
Since the volume of a cube is equal to the edge length cubed, we can write the edge length, L, as:
L³ = V
L = [tex](V)^{\frac{1}{3} }[/tex]
Plugging in the values and converting from cm³ to m³, we get:
L = [tex](\frac{80.7}{8.96\times10^{-3} } )^{\frac{1}{3} }[/tex]
L = 0.11 m
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1. A ____ current means that more _____ flows per second.
2. A student connects up an ammeter in a circuit with a lamp and a cell. The reading is 0.5 A. She moves the ammeter to the other side of the lamp.
a. What will the ammeter read now?
b. Explain your answer.
1.
A stronger current means that more charge flows per second.
2.
a. The ammeter will read the same, 0.5 A.
b. The ammeter measures the flow of electric charge in a circuit, which is called the current. The amount of current in a circuit depends on the properties of the components in the circuit, not the position of the ammeter. Therefore, moving the ammeter to the other side of the lamp will not change the current flowing through the circuit, and the reading will remain the same.
1. An electrical current means that more electrons flows per second.
2. a. 0.5 A
b. Because current always stays the same in series
circuits.
in some instances, people who happen to be near the point where a lightning bolt is struck the earth have reported that their clothes are thrown off as a result of a strike. why might this happen?
People that are near a point where a lightning bolt is gonna strike said that their clothes are thrown off by the strike because the lightning may come in contact with their sweat or raindrops that may lie on their skin's surface.
Lightning is an electrostatic discharge that naturally occurs. It happens when two electrically charged regions in the atmosphere (or one of them on the ground) are temporarily neutralized, causing an instant release of energy.
When a person is near a point where a lightning bolt struck the earth, they may experience their clothes getting thrown off. It happens because the lightning comes into contact with the liquid water on the skin's surface, like sweat or raindrops.
When the contact happens, the liquid water turns into steam. Its volume increased so much that it can create a vapor explosion that would throw off their clothes (sometimes even shoes).
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6. A loaded 10 000 kg train freight car (ma) roll at 3 m. -1 to the right toward a
2 000 kg freight train car travelling at 4 m. –1 in the oppoite direction. On
colliion, the two car couple (lock together). A) What i the velocity of the two freight train car after the colliion? (4)
b) Calculate the impule exerted on each freight train car. (4)
c) If the colliion lat 0,7 , calculate the net force exerted on each freight
train car. (4)
d) Show that thi i an inelatic colliion
A) The velocity of the two freight car is 1.83 m/s, B) The impulse exerted on each freight train car is 22000 kg-m/s, C) The net force exerted on each freight train car is 31428.6 N.
Mass of the loaded freight car, m₁ = 10000 kg
Initial velocity of the loaded freight car, v₁ = 3 m/s
Mass of the empty freight car, m₂ = 2000 kg
Velocity of the empty freight car, v₂ = -4 m/s
Let the velocity of the coupled car after collision, = v
By the law of conservation of momentum,
m₁v₁ + m₂v₂ = (m₁+m₂)v
A) v = (10000×3 - 2000×4)/(10000+2000)
v = 1.83 m/s
B) Impulse = change in momentum(Δp)
Δp = 10000×3 - 2000×4 = 22000 kg-m/s
C) Net force, F = Impulse/time = 22000/0.7
F = 31428.6 N
D) The collision is inelastic as the final speed of both the car is less than their initial velocities.
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a bicycle pump contains 0.650 l of air at 101 kpa. if the pump is sealed, what pressure is required to change the volume to 0.250 l?
The pressure required to change the volume from 0.650 L to 0.250 L is 298 kPa. We can find out using Ideal Gas Law.
The ideal gas law states that the pressure, volume, and temperature of a gas are related by the equation:
PV = nRT
where P is the pressure, V is the volume, n is the number of moles of gas, R is the gas constant, and T is the temperature in kelvins.
Since the temperature is constant, we can simplify the equation to:
P1V1 = P2V2
where P1 and V1 are the initial pressure and volume, and P2 and V2 are the final pressure and volume. Rearranging the equation gives:
P2 = P1 * (V1 / V2)
Substituting in the known values, we find:
P2 = 101 kPa * (0.650 L / 0.250 L) = 298 kPa
Therefore, pressure is 298kPa.
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Solid water becomes a liquid when the pressure increases isothermally. The entropy of the water¬¬¬¬_______
A. Increases
B. Decreases
C. Remains the same
Solid water becomes a liquid when the pressure increases isothermally. The entropy of the water Increases
This is because the increase in pressure causes the water molecules to gain more thermal energy and become more disordered.
This results in an increase in entropy, as the number of available microstates for the water molecules has increased.
In general, an increase in temperature or pressure results in an increase in entropy, as it promotes a greater degree of disorder and randomness in the system.
Conversely, a decrease in temperature or pressure will result in a decrease in entropy, as it promotes a greater degree of order and stability in the system.
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Shira is trying to decide between getting a debit card, a prepaid debit card, and a credit card.
Which statement is true?
(2 Points)
O All 3 cards are completely different
O Debit cards and prepaid debit cards are the same
O Debit cards and credit cards are the same
O All 3 cards are completely the same
Answer:
All 3 cards are completely different
a ball is thrown vertically upward from the edge of a bridge 24.0 m high with an initial speed of 13.0 m/s. the ball falls all the way down and strikes the water below. determine the magnitude of the velocity
The magnitude of the velocity of the ball when it strikes the water below the bridge is 26.0 m/s.
This is calculated by using the equation v^2 = v0^2 + 2gh, where v0 is the initial velocity, g is the acceleration due to gravity, and h is the height of the bridge. In this case,
v_0 = 13.0 m/s, g = 9.8 m/s^2, and h = 24.0 m,
so the equation becomes:
v^2 = (13.0 m/s)^2 + 29.8 m/s^2*24.0 m = 884 m^2/s^2, and v = 29.7 m/s
To calculate velocity, you need to know the displacement and time. Velocity is the rate of change of displacement with respect to time, so the formula for calculating velocity is velocity = displacement/time.
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an egg drops from a second-story window, taking 1.12 s to fall and reaching 11.0 m/s just before hitting the ground. on contact, the egg stops completely in 0.131 s. calculate the magnitudes of its average acceleration (a) while falling and (b) while stopping
The average acceleration of the egg while falling can be calculated using the equation a = (v - u)/t, where v is the final velocity, u is the initial velocity and t is time.
The average accelerationa) A = (11.0 m/s) / (1.12 s) = 9.82 m/s^2
b) A = (0 m/s) / (0.131 s) = 0 m/s^2
This is a physics problem involving the concepts of acceleration, velocity, and time.Acceleration is the rate of change of velocity and is a vector quantity, meaning it has both a magnitude and direction.In this case, v = 11.0 m/s, u = 0 m/s and t = 1.12 s.This gives an acceleration of 9.82 m/s^2 downwards, the same value as the acceleration due to gravity.The average acceleration of the egg while stopping can be calculated using the same equation, but with v = 0 m/s, u = 11.0 m/s and t = 0.131 s.This gives an acceleration of -84.3 m/s^2, which is an acceleration directed upwards, opposite to the acceleration due to gravity.In summary, the egg experienced an average acceleration of 9.82 m/s^2 downwards while falling, and an average acceleration of -84.3 m/s^2 upwards while stopping.To learn more about The average acceleration refer to:
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"When a grasshopper egg hatches, a baby grasshopper called a pupa comes out of the egg and begins to grow. Although the nymph grasshopper already looks like a grasshopper, it still needs to molt its exoskeleton many times before becoming a full-grown adult."
When a grasshopper egg hatches, a baby grasshopper called a pupa comes out of the egg and begins to grow. The nymph grasshopper already looks like a grasshopper, it still needs to molt its exoskeleton many times before becoming a full-grown adult therefore the statement which corrects the error in the passage is that a baby grasshopper is a nymph and is therefore denoted as option B.
What is an Exoskeleton?This is referred to as an external skeleton that supports and protects an animal's body while an internal skeleton such as in humans is referred to as endoskeleton.
During metamorphosis, egg hatches into larva and then to nymph which is referred to as the baby of the insect involved thereby making it the correct choice.
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The full question:
"When a grasshopper egg hatches, a baby grasshopper called a pupa comes out of the egg and begins to grow. Although the nymph grasshopper already looks like a grasshopper, it still needs to molt its exoskeleton many times before becoming a full-grown adult."
Which statement corrects the error in the passage?
Question 3 options:
A baby grasshopper is a larva.
A baby grasshopper is a nymph.
The grasshopper nymph hatches.
The nymph has no exoskeleton
what other structures have the similar characteristic as the parthenon?
The Parthenon is a famous ancient Greek temple known for its classical architecture, which was built in Athens between 447 and 432 BC.
Many other structures have been inspired by the Parthenon and have similar characteristics, including:
The Propylaea: A monumental gateway to the Acropolis in Athens, Greece, built during the same time period as the Parthenon.The Temple of Athena Nike: Another temple on the Acropolis in Athens, which also embodies the classic Greek architectural style.The Erechtheum: A temple on the Acropolis in Athens, which is known for its intricate and decorative carvings.The Temple of Olympian Zeus: A massive temple in Athens, Greece, dedicated to the god Zeus, and similar in design to the Parthenon.The Maison Carrée: A well-preserved Roman temple in Nîmes, France, which was built in the same classical architectural style as the Parthenon.The Pantheon: A temple in Rome dedicated to all the gods, and renowned for its iconic dome and classical columns, similar to the Parthenon.These structures, like the Parthenon, showcase the beauty and elegance of ancient Greek architecture and its influence on other cultures and time periods.
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does a heat flux vector at a point p on an isothermal surface of a medium have to be perpendicular to the surface at that point? explain.
A heat flux vector at a point p on an isothermal surface of a medium must be perpendicular to the surface at that point.
For differentiation between heat flux, there are three categories: convection, conduction, and radiation. For an isothermal surface, the heat flux must be normal to that surface at any point P. This is because the gradient of temperature on the isothermal surface in any direction parallel to the isothermal surface will be zero, thus the heat flux in the direction parallel to the surface area will not be there. The heat flux vector is directed towards regions of lower temperature. So, a heat flux vector at a point p on an isothermal surface of a medium must be perpendicular to the surface at that point.
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First come first serve, solve for points
When a substance melts, it can exist in both the solid and liquid states, and when it boils, it can exist in either the liquid or gaseous states.
What are the Implications of Different Boiling Points?
The ability to separate liquids through distillation is one practical use of the various boiling points of alcohols and alcohol in relation to water and other liquids. A liquid is carefully heated throughout the distillation process to cause the more volatile chemicals to boil away.They can be gathered and used to distil alcohol, or they can be used to remove substances with lower boiling points from the original liquid to purify it. Alcohols can be distinguished from one another and from other chemical compounds using their distinct boiling points. Alcohol and water can be separated using distillation. Water has a boiling point of 212 F or 100 C which is higher than that of alcohol.To learn more about liquid states refer to:
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On a cello the 0.68 m long strings are turned by winding one end around a peg or fret. For a peg diameter of 15mm, calculate how many turns will be necessary to achieve a tension in the 1.36 mm diameter string of 84 N (approximately middle G)
The number of turns turned by winding around a peg are calculated to be 0.003.
Extension δ is given by the formula,
δ = εL = σL/E = FL/AE
where, F is force
L is length
A is area
E is modulus of elasticity
⇒ (84 × 0.68)/[π(1.36 × 10⁻³)²/4](210 × 10⁹) = 0.00019 m
And this is wrapped around the peg's circumference,
Number of turns n = 0.00019/π d = 0.00019/π(15 × 10⁻³) = 0.003 times or about 1.4 degrees.
The peg needs to be turned 1.4 degrees.
Thus, the number of turns turned by winding around a peg are calculated to be 0.003.
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a 12 v battery of 0.05-ohm resistance and another battery of 12 v and 0.075 ohm resistance supply power to a 2-ohm resistor. what is the current through the load?
The required current through the load when two batteries are connected is calculated to be 11.3 A.
Two batteries are connected in series so their voltages should be added.
Total voltage V = 12 V + 12 V = 24 V
The total resistances of the two batteries is,
⇒ 0.05 + 0.075 = 0.125 ohm
Load resistance is given as 2 ohm.
Now, let us calculate the load current.
From ohm's law, we know that, V = i R
where, V is voltage
i is current
R is resistance
Making i as subject, we have,
i = V/R = 24/(2 + 0.125) = 11.3 A
Thus, the current through the load is calculated to be 11.3 A.
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