The gravitational potential energy of an Earth-apple system is 10 J, a) it means someone did the 10 J of work in lifting the apple and c) A 100 gm apple is 10 m above the ground.
Gravitational potential energy is the energy possessed by an object due to its position relative to the ground surface. It is formulated as:
P = mgh
Where m is the mass of the object, g is the acceleration due to gravity of Earth, and h is the height of the object above ground level. So if someone lifts the apple of 100 gm mass, up to 10 m, then the work done by the person will be the equal to the potential energy of the apple at 10 m height.
m = 100 gm = 0.1 kg
g = 10 m/s²
h = 10 m
P = 0.1 × 10 × 10
P = 10 j
Hence the option (d) is correct.
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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
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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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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a wave oscillates 5.0 times a second and has a speed of 5.0 m/s . what is the wavelength of this wave?
Answer:
Explanation:
v=wavelengths *frequency
5.0/5.0
But I think is wrong the question
Because if they ask you wavelength you need to have frequency and speed
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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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.
why, when popped, does a fully inflated balloon make a louder noise than a partially inflated balloon? use energy considerations in your answer. type your answer
It happens due to the elasticity of balloon.Also, the pressure inside the balloon of air is higher than outside, which creates a difference between the surrounding air pressure and the pressure inside the balloon.
why, when popped, does a fully inflated balloon make a louder noise than a partially inflated balloon?
The fully inflated balloon has more elastic energy, therefore, more energy is converted to sound energy.When you pop a balloon, the air that was compressed (squeezed) inside of it rapidly expands, creating a shock wave through the air that sounds like a loud bang.A study, published in the Canadian Audiologist journal, found that when a balloon is tightly inflated to pop, the bursting balloon is louder than a shotgun going off next to someone's ear and nearly as intense as a 357 magnum pistol. Researchers found a balloon inflated to rupture peaks at 168 decibels (dB).The pressure inside the balloon is more than that of atmospheric pressure and it increases when we inflate a balloon. Balloon bursts when the pressure inside the balloon becomes higher than its wall capacity to hold.
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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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does the average mass of the object, based on the experimental trials, agree with the mass measured with a digital scale?
To determine if the average mass of the object, based on the experimental trials, agrees with the mass measured with a digital scale, you will need to compare the two values.
If the difference between the two values is small, then the average mass of the object based on the experimental trials is in agreement with the mass measured with the digital scale.
If the difference between the two values is large, then the average mass of the object based on the experimental trials is not in agreement with the mass measured with the digital scale.
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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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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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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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Two negative charges that are both -5.0 x 10^-5 C push each other apart with a force of 15 N. How
far apart are the two charges?
Contrary charges attract each other whereas like charges repel one another. Accordingly, two negative charges repel one another, but a positive charge pulls a negative charge toward it. Along the line between the two charges, attraction or repulsion occurs.
What are the interactions between two negative charges?Coulomb's law is a mathematical formula that describes the electric force that exists between charged things. It was developed by Charles-Augustin de Coulomb, a French physicist, and is comparable to Isaac Newton's law of gravity.Electric force and gravitational force both act along a line separating the two objects, and both forces diminish with the square of the distance between them. The electric charge of an object, as opposed to the mass of an object, determines the amount and sign of the electric force according to Coulomb's law. The effect of electromagnetic on the motion of charged objects is thus determined by charge. A basic characteristic of matter is charge. Each component of matter possesses an electric charge that can either be positive, negative, or zero.As an illustration, atomic nuclei have a positive charge while electrons have a negative charge. Due to the equal distribution of positive and negative charges in most bulk matter, it has zero net cha.Example :
15N = 9 * (10)9 NM²(-5.0 * (10) -5 C) (-5.0 * (10 )- 5 c) / c² (d)²
15N = 22.5 NM² / d²
d ² = 22.5 NM² / 15N
d² = 1.5m².
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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 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)
Consider S:M (i.e. surface area to mass ratio) of an object. What happens to the ratio when the density of an object decreases while the surface area and volume remain the same?Group of answer choices:it increasesthe outcome cannot be determinedit depends on the nature of the material in the objectit decreasesit remains the same
The ratio of surface area to mass when the density of an object decreases while the surface area and volume remain the same, increases. The correct option is A.
An object's surface area and volume don't change, but its density does. The formula for density
ρ = m ÷ V
V = m ÷ ρ
m = mass (kg)
V = volume (m³)
ρ = the density (kg/m³)
The density decreases
ρ₁ > ρ₂
The surface area remains the same
A₁ = A₂
The volume remains the same
V₁ = V₂
V₁ = V₂
m₁ ÷ ρ₁ = m₂ ÷ ρ₂
m₂ × ρ₁ = m₁ × ρ₂
m₂ = (m₁ × ρ₂) ÷ ρ₁
ρ₁ > ρ₂
m₂ < m₁
The density decreases, and the mass also decreases.
The quantity of surface area per unit mass of an object is known as the surface area to mass ratio.
S:M = A ÷ m
At initial (S:M)₁ = A₁ ÷ m₁
At final (S:M)₂ = A₂ ÷ m₂
A₁ = A₂
m₂ < m₁
(S:M)₂ > (S:M)₁
Thus, the surface area to mass ratio will increase.
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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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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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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 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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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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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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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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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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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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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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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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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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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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a 10 kg object is moving in a straight-line with an initial speed of 2 m/s. how long (in s) will it take for the speed of the object to increase to 10 m/s if its kinetic energy increases at a rate of 20 j/s? you may treat this as an isolated system. a 10 kg object is moving in a straight-line with an initial speed of 2 m/s. how long (in s) will it take for the speed of the object to increase to 10 m/s if its kinetic energy increases at a rate of 20 j/s? you may treat this as an isolated system.
10 kg object is moving in a straight line with an initial speed of 2 m/s.it will take 8 seconds for the speed of the object to increase to 10 m/s if its kinetic energy increases at a rate of 20 j/s.
In an isolated system, energy is conserved, meaning that the total energy of the system remains constant. In this case, the rate of energy increase is 20 J/s, meaning that 20 J of energy is added to the system each second. This energy is used to accelerate the object, increasing its kinetic energy and thus its speed.
The equation t = (KE2 - KE1)/P can be used to calculate the amount of time it takes for an object to accelerate from one speed to another given a rate of energy increase. In this case, the object is accelerating from an initial speed of 2 m/s to a final speed of 10 m/s, and the rate of energy increase is 20 J/s. Therefore, it will take 8 seconds for the object to reach its final speed.
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