A boat uses its motor to increase its speed from 5 m/s to 7 m/s. If the boat has a mass of
250 kg, what was the impulse applied by the motor?
Answers
Answer:
J = 500 kg-m/s
Explanation:
Given that,
Initial speed of the motor, u = 5 m/s
Final speed of the motor, v = 7 m/s
Mass of the boat, m = 250 kg
We need to find the impulse applied by the motor. We know that impulse is equal to the change in momentum. It is represented by letter J.
J = m(v-u)
J = 250 (7-5)
J = 500 kg-m/s
Hence, the impulse applied by the motor is 500 kg-m/s.
Related Questions
if a red star and a blue star both have the same size, and both are the same distance from earth, which one looks brighter in the night sky? explain in detail.
Answers
In the night sky, the red star appears brighter than the blue star of the same size and distance from Earth.
The perceived brightness of a star depends on its intrinsic luminosity and the sensitivity of our eyes to different colors. Red stars typically have lower surface temperatures compared to blue stars, which affects their luminosity.
Despite having the same size and being at the same distance, the red star emits more light in the visible spectrum, making it appear brighter to our eyes. Additionally, our eyes are more sensitive to the red region of the electromagnetic spectrum compared to the blue region. Therefore, even with the same physical properties, the red star would be visually brighter in the night sky than the blue star.
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what is the acceleration of a proton moving with a speed of 8.0 m/s at right angles to a magnetic field of 1.8 t ?
Answers
A proton will accelerate at 1.27 109 m/s2. The rate of a change in velocity is called acceleration.
A magnetic field is what?It is the kind of field that produces magnetic force. use a magnetic field to assist. The field that is sensed around a moving electric charge is how the magnetic force is measured.
The information provided in the issue is;
What is a proton's acceleration equal to?
The speed is 8.0 m/s, therefore v.
B = 1.8 T is the magnetic field.
The centripetal force and the megnetic force are equivalent;
qvB =m v/r
ac = 1.6 * 10 -18* 9.5* 1.8/1.67810-27
=1.27*10m/s
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A bullet is shot at some angle above the horizontal at an initial velocity of 87m/s on a level surface. It travels in the air for 13.6 seconds before it strikes the ground 760 m from the shooter. At what angle above the horizontal was the bullet fired? Round to the nearest whole number and include units in your answer Use g= -9.8 m/s2 for the acceleration of gravity.
Answers
Answer: 50°
Explanation:
Given the following :
Initial Velocity of bullet (U) = 87m/s
Time of travel (t) = 13.6s
Horizontal Distance traveled (S) = 760m
Therefore, the horizontal angle of projection of the bullet :
Using the second equation of motion:
S = ut + 0.5at^2
Where a = g = acceleration due to gravity, S = distance traveled, t= time taken and U = Initial Velocity.
The Angle of projection along the horizontal is represented as cosΘ
Acceleration due to gravity after the bullet has hit the ground = 0
Therefore, rewritten the equation :
S = ucosΘ * t + 0.5at^2
760 = 87 * Cosθ * 13.6 + 0.5(0)(13.6)^2
760 = 1183.2 * Cosθ + 0
Cosθ = 760 / 1183.2
Cosθ = 0.6423
Θ = cos^-1(0.6423)
Θ = 50.036460
Θ = 50°
A person pushed on the petal of a bike and causes it to move to the left. The applied force was 85 N left and the force of friction was 12 N right. Find the net force
Answers
Answer:
The net force is 73 N to the left
Explanation:
The net force f = applied force, F + frictional force, f'
f = F - f'
If we take right as positive,
F = -85 N (since it is to the left) and f' = +12 N (since it is to the right)
So, f = F + f'
f = -85 N + 12 N
f = -73 N
So, the net force is 73 N to the left
When equal mass of hot water and oil at the same temperature are allowed to cool water cools slower than the oil why?
Answers
It is because water has a higher heat capacity as compared to the heat capacity of oil.
The amount of heat that must be applied to an object in order to cause a unit change in temperature is known as the heat capacity or thermal capacity of that object. Heat capacity is measured in joules per kelvin (J/K), the SI unit.
Heat capacity is an example of extensive property. A physical quantity which is an extensive property has a value that is proportional to the size of the system it describes or the amount of matter present in the system. C stands for the heat capacity of an object.
Because water has a higher specific capacity than oil and must expend more energy to cool down, it does so more slowly when two equal masses of hot water and oil are allowed to cool.
Therefore, When the equal mass of hot water and oil at the same temperature is allowed to cool water cools slower than the oil.
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What is the vapor pressure lowering at 20c of an ideal solution prepared by the addition of 1.36g?
Answers
The vapour pressure of the solution exists 83.24 mmHg.
How to find the vapour pressure of the solution?
The vapor pressure of the solution
(Psolution) = (Xmethanol)(P°methanol).
where Psolution exists the vapor pressure of the solution,
Xmethanol exists as the mole fraction of methanol,
P°methanol exists in the pure vapor pressure of methanol.
We must estimate the mole fraction of methanol (Xmethanol).
Xmethanol = (n)methanol/(n) total.
where n methanol exists the number of moles of methanol.
n total exists the total number of moles of methanol and urea.
We can estimate the number of moles of both methanol and urea utilizing the relation: n = mass/molar mass.
n of methanol = mass/molar mass = (56.9 g)/(32.04 g/mol) = 1.776 mol.
n of urea = mass/molar mass = (7.38 g )/(60.06 g/mol) = 0.123 mol.
∴ Xmethanol = (n)methanol/(n) total
= (1.776 mol)/(1.776 mol + 0.123 mol) = 0.935.
∴ Psolution = (Xmethanol)(P°methanol)
= (0.935)(89.0 mmHg) = 83.24 mmHg.
The complete question is:
What is the vapor pressure at 20 °c of an ideal solution prepared by the addition of 7.38 g of the nonvolatile solute urea, co(nh2)2, to 56.9 g of methanol, ch3oh? the vapor pressure of pure methanol at 20 °c is 89.0 mm hg.
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*If someone says v-u=0 ,what does it mean. *What is the relation among mometum,mass and velocity. *A moving bus a little distance forward even when breaks are applied on it which Newton's laws work here? *Under what conditions acceleration of a moving object will be zero?
Answers
Answer:
1) It means that the acceleration is 0
2) Momentum, p = Mass, m × Velocity, v
3) Newton's second law of motion
4) The conditions where there are no resultant forces acting on the object
Explanation:
1) The value v - u = 0 means that the acceleration is 0
The relation between v and u is v = u + a·t
v - u = a·t
When v - u = 0 we have;
a·t = 0
a = 0 or t = 0
Acceleration, a = 0
2) The relation between momentum, mass and velocity is
Momentum, p = Mass, m × Velocity, v
p = m × v
3) The bus moving a little distance forward even when the breaks are applied is due to the following relation;
Force = Rate of change of momentum produced
Which is Newton's second law of motion
Therefore, where the the force is low, the rate of change of the momentum and therefore, the velocity will be low, and the bus will still move further after applying the breaks
4) According to Newton's first law of motion, the conditions under which the acceleration of a moving object will be zero includes conditions where there are no resultant forces acting on the object.
What do you need to include in a free body diagram?
Answers
Answer:
Interact with it
Explanation:
The body in a condensed form (often a dot or a box)
Straight arrows pointing in the direction in which forces act on the body are represented.
Moments are portrayed by curved arrows pointing in the direction in which they impact the body.
A coordinate system is a series of coordinates.
Calculate the force generated by a 1250 mbarmbar pressure on an area of 3 mm^2.
Answers
Answer:
0.375 N
Explanation:
1250 * 3 mm^2 =0.375 N
A student wants to build a simple circuit. Which material would be used to design a circuit with the last amount of resistance?
A. Long wires with a large diameter
B.Long wires with a thin diameter
C.Short wires with a large diameter
D.Short wires with a thin diameter
Answers
Answer:
C
Explanation:
The shorter a wire, the less it will be worn down from moving around, and the thicker the wire, the longer it will last.
Short wires with a wide diameter will be the material utilized to build a circuit with the minimum amount of resistance. Then, C is the right answer.
What is the circuit?Electrical devices such as resistance, transistors, capacitors, inductors, and diodes are connected via conductive wires or traces that allow the electric current to pass between them.
A closed-loop system in which electrons can move is called a circuit. Electricity is supplied to the circuit by an electricity source, such as a battery. No electrons will travel till the circuit is finished, that is, it goes full round back to the electricity source.
A student wants to build a simple circuit.
The material would be used to design a circuit with the least amount of resistance will be short wires with a large diameter. Then the correct option is C.
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As is obvious from the previous questions, the color appearance of an object is dependent upon the colors
of light that are incident upon it. The color of an object is not actually within the object itself; rather, the
color is in the light which shines upon it is ultimately reflected by it to our eyes. A yellow object does not
always appear yellow. Suppose we were to restrict the discussion to some combination of red, green and
blue primary light colors being incident upon the yellow object. As such, the yellow object only appears
yellow when it reflects red and green light to our eyes. If either red or green light is NOT incident upon
it, then the shirt will not appear yellow. Express your understanding of this by answering the following
questions.
3.
4.
5.
6.
Name possible colors that a red shirt could appear when viewed under various combinations of red,
green and blue spotlights.
7.
8.
9.
10.
11.
12.
13.
14.
15.
Name possible colors that a yellow shirt could appear when viewed under various combinations of
red, green and blue spotlights.
Name possible colors that a magenta shirt could appear when viewed under various combinations
of red, green and blue spotlights.
Name possible colors that a cyan shirt could appear when viewed under various combinations of
red, green and blue spotlights.
Three colored spotlights - red, green and blue - with equal intensities are turned ON and OFF to
illuminate a shirt with different colors of light. A shirt that appears (A) when viewed in
white light is placed under the spotlights and appears (B) This is conclusive evidence that the
spotlights are turned on and the
spotlights are turned off.
(C)
(D)
A
Appearance in
white light
Red
Green
Green
Yellow
Yellow
Cyan
Cyan
Magenta
Magenta
B
Appearance under
unknown lights
Red
Green
Black
Red
Green
Cyan
Blue
Red
Black
Spotlights which
are ON
16. If suddenly you were given a chemical that impaired the
nerves in your eyes that detect red light, what color
would a U.S. flag appear? Show this in the diagram by
labeling the different parts.
D
Spotlights which
are OFF
Answers
The color appearance of an object depends on the colors of light incident upon it. A yellow object only appears yellow when it reflects red and green light to our eyes. Different combinations of red, green, and blue spotlights can make objects appear in different colors. If the nerves in the eyes that detect red light are impaired, an object that is normally red would appear as a combination of blue and green.
The light spectrum refers to the range of electromagnetic radiation frequencies that are visible to the human eye. It includes all the colors of the rainbow, from violet to red.
3. The possible colors that a red shirt could appear when viewed under various combinations of red, green, and blue spotlights are:
Red: When viewed under red light
Black: When viewed under blue and green light
Yellow: When viewed under red and green light
Cyan: When viewed under blue and green light
Magenta: When viewed under red and blue light
4. The possible colors that a yellow shirt could appear when viewed under various combinations of red, green, and blue spotlights are:
Yellow: When viewed under red and green light
White: When viewed under red, green, and blue light
Black: When viewed under blue and green light
Cyan: When viewed under blue and green light
Magenta: When viewed under red and blue light
5. The possible colors that a magenta shirt could appear when viewed under various combinations of red, green, and blue spotlights are:
Magenta: When viewed under red and blue light
White: When viewed under red, green, and blue light
Black: When viewed under green light
Yellow: When viewed under red and green light
Cyan: When viewed under blue light
6. The possible colors that a cyan shirt could appear when viewed under various combinations of red, green, and blue spotlights are:
Cyan: When viewed under blue and green light
White: When viewed under red, green, and blue light
Black: When viewed under red light
Yellow: When viewed under red and green light
Magenta: When viewed under red and blue light
16. If the nerves in the eyes that detect red light were impaired, a U.S. flag would appear as a blue and green flag, with no red stripes or stars.
If suddenly you were given a chemical that impaired the nerves in your eyes that detect red light, a US flag would appear without red stripes, which means it would only have white and blue stripes. The stars in the blue field would also appear slightly different, as they would be missing the red color.
This is because the red cones in our eyes, which are responsible for detecting red light, would not be functioning properly. As a result, the brain would not receive any signals from these cones, and the image of the flag would be processed without the red color.
Therefore, The colours of light that strike an object determine its appearance in terms of colour. Only when red and green light are reflected by a yellow item can they look yellow to our sight. Different arrangements of red, green, and blue spotlights can give the appearance that an item has a different colour. An object that is ordinarily red would look as a mixture of blue and green if the nerves in the eyes that detect red light were damaged.
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The color appearance of an object depends on the colors of light incident upon it. A yellow object only appears yellow when it reflects red and green light to our eyes. Different combinations of red, green, and blue spotlights can make objects appear in different colors. If the nerves in the eyes that detect red light are impaired, an object that is normally red would appear as a combination of blue and green.
The light spectrum refers to the range of electromagnetic radiation frequencies that are visible to the human eye. It includes all the colors of the rainbow, from violet to red.
3. The possible colors that a red shirt could appear when viewed under various combinations of red, green, and blue spotlights are:
Red: When viewed under red light
Black: When viewed under blue and green light
Yellow: When viewed under red and green light
Cyan: When viewed under blue and green light
Magenta: When viewed under red and blue light
4. The possible colors that a yellow shirt could appear when viewed under various combinations of red, green, and blue spotlights are:
Yellow: When viewed under red and green light
White: When viewed under red, green, and blue light
Black: When viewed under blue and green light
Cyan: When viewed under blue and green light
Magenta: When viewed under red and blue light
5. The possible colors that a magenta shirt could appear when viewed under various combinations of red, green, and blue spotlights are:
Magenta: When viewed under red and blue light
White: When viewed under red, green, and blue light
Black: When viewed under green light
Yellow: When viewed under red and green light
Cyan: When viewed under blue light
6. The possible colors that a cyan shirt could appear when viewed under various combinations of red, green, and blue spotlights are:
Cyan: When viewed under blue and green light
White: When viewed under red, green, and blue light
Black: When viewed under red light
Yellow: When viewed under red and green light
Magenta: When viewed under red and blue light
16. If the nerves in the eyes that detect red light were impaired, a U.S. flag would appear as a blue and green flag, with no red stripes or stars.
If suddenly you were given a chemical that impaired the nerves in your eyes that detect red light, a US flag would appear without red stripes, which means it would only have white and blue stripes. The stars in the blue field would also appear slightly different, as they would be missing the red color.
This is because the red cones in our eyes, which are responsible for detecting red light, would not be functioning properly. As a result, the brain would not receive any signals from these cones, and the image of the flag would be processed without the red color.
Therefore, The colours of light that strike an object determine its appearance in terms of colour. Only when red and green light are reflected by a yellow item can they look yellow to our sight. Different arrangements of red, green, and blue spotlights can give the appearance that an item has a different colour. An object that is ordinarily red would look as a mixture of blue and green if the nerves in the eyes that detect red light were damaged.
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A 1.5 x 10^4 kg railroad car moving at 7m/s to the north collides with and sticks to another car of 2 x 10^4 kg that is moving in the opposite direction. What is the velocity of the 2x10^4 kg car just before the collision if their final velocity is found to be 3 m/s.
Answers
The velocity of the 2x10^4 kg car just before the collision is 0 m/s.
What is conservation of momentum principle?When two bodies of different masses move together each other and have head on collision, they travel to same or different direction after collision.
The external force is not acting here, so the initial momentum is equal to the final momentum. For inelastic collision, final velocity is the common velocity for both the bodies.
m₁u₁ +m₂u₂ =(m₁ +m₂) v
Substitute the values for m₁ = 1.5 x 10^4 kg, m₂ =2 x 10^4 kg and u₁ =7 m/s, the final velocity is 3m/s/
1.5 x 10^4 x 7+2 x 10^4 x u₂ = (1.5 x 10^4 + 2 x 10^4) x 3
u₂ = 0 m/s
So, the car with mass 2x10^4 kg is stationary.
Thus, the velocity of the 2x10^4 kg car just before the collision is 0 m/s.
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Actividad
1: En general, la dificultad para arrancar electrones aumenta de izquierda a derecha en cada periodo de la tabla periódica. Busca en la tabla periódica potasio (K), calcio (Ca) y uranio (U) y basándote en sus posiciones indica cuál de ellos tendrá una función de trabajo más baja y cuál más alta:
Menor función de trabajo:
Mayor función de trabajo:
2.- La energía de un electrón emitido se mide en electrón-voltios(eV). Un electrón con una energía de 1 eV puede superar un campo eléctrico de 1 voltio. En el simulador, aumenta la tensión hasta que encuentres la tensión más alta que todavía permite a los electrones llegar al amperímetro.
Tensión =
El volaje que has encontrado es igual a la energía de los electrones emitidos en eV.
Answers
a car company advertizes that their new car can accelerate from rest to 70 km/s in 7 seconds. what is the car's acceleration
Answers
The acceleration of car that pick 70 km/s in 7 second is 10 km/s²
Any procedure where the velocity varies is referred to as acceleration. There are only two ways to accelerate: changing your speed or changing your direction, or changing both. This is because velocity is both a speed and a direction.
No matter how quickly you're moving, you can't possibly be accelerating if you're not also altering your direction and speed. As a result, even if a jet is travelling at a high rate of speed—in this case, 800 miles per hour—it experiences no acceleration because its velocity is constant.
Given
Velocity of car = 70 km/s
Time taken = 7 s
Acceleration = change in velocity/ time taken
Acceleration = 70/7
Acceleration = 10 km/s²
Hence, acceleration determined by both velocity and time.
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The image above shows a crash test dummie's head traveling at -1.005 m/s while striking a headrest from a car traveling 4.524 m/s with a mass of 2005.6 kg. If the crash test dummie's head head bounces off the headrest with a 9.965 m/s and the car continues traveling at 4.487 m/s, calculate the mass of the crash test dummie's head?
Answer:
Answers
From the calculation, the mass of the dummies head is 1647.44 Kg
What is the mass of the crash test dummies head?We know that the momentum after collision is equal to the momentum before collision.
Mass of the headrest = 2005.6 kg
Initial velocity of the head rest = 4.524 m/s
Final velocity of the head rest = 4.487 m/s
Mass of the dummy = m
Initial velocity of the dummy = -1.005 m/s
Final velocity of the dummy = 9.965 m/s
Then;
(m * -1.005) + (2005.6 * 4.524 ) = (2005.6 * 4.487) + (m * 9.965)
-1.005m + 9073.33 = 8999.13 + 9.965m
9073.33 - 8999.13 = 9.965m + 1.005m
18072.46 = 10.97m
m = 18072.46/ 10.97
m = 1647.44 Kg
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A go-cart and rider have a mass of 100 kg. If the cart accelerates at 5 m/s2 during a 25 m sprint, how much work did the cart do
Answers
Answer:20watts
Explanation:
Answer:
The solution is given below
Explanation:
The computation is shown below;
We know that
Work done = Fs cosθ
But before that we need to determine the force i.e.
We know that
Force (F) = mass (m) × Acceleration (a)
= 100 × 5
= 500 N
Now, work done by the go-cart is
Work done (W) = Fs cosθ
= 500 × 25 × cos(0°)
= 500 × 25 × 1
= 12,500 J
If you drop a 60 kg rock and a 30 kg rock from the same height at the same time and in the absence of air drag, they fall with?
Answers
Net force changes momentum, while net torque changes angular momentum.TrueFalse
Answers
ANSWER:
True
STEP-BY-STEP EXPLANATION:
Moment depends on force and angular momentum depends on torque. Which means that if the statement is fulfilled.
What is the best insulator?
A) copper
B) aluminum
C) a soda can
D) a staple
E) rubber
Answers
Answer:
E
Explanation:
All others conduct electricity and heat.
Answer:
E.Rubber
Explanation:
Rubber is the best insulator, they have them coated around electricity wires, while metals are good conductors.
If u could give me brainly that would be awsome-u dont have to tho, HAVE A GREAT DAY!! :))
Struggling with this, pls answer:( Brainliest to the (FIRST) right answer
Answers
Answer:
c. a and c
Explanation:
ammeters are connected in series to measure charge/current
PLEASE HELP
A pendulum is in a spacecraft to measure
acceleration during lift off. Before the launch, its period
is 6.5 X 10-3 s. At a point during lift off, its period is 3.1
X 10-3 s. What is the acceleration at this point?
Answers
Answer:
im just 15 yearsold hehhez i dont know that either
Which type of rays have a wavelength shorter than that of visible light?
A.
microwaves
B.
infrared rays
C.
gamma rays
D.
radio waves
Answers
Answer:
c
Explanation:
wavelength shorter means energy is higher
the wavelength
radio waves>microwave>infrared rays>gamma rays
What happens in a convection cell?
Answers
Answer:
In the field of fluid dynamics, a convection cell is the phenomenon that occurs when density differences exist within a body of liquid or gas. The colder, denser part of the fluid descends to settle below the warmer, less-dense fluid, and this causes the warmer fluid to rise.
Explanation:
Answer: When density differences exist within a body of liquid or gas,
A science teacher ran a marathon. After the race she showed her students the silver blanket she was given to keep her warm.A group of students investigated how the colour of the blanket affected how much infrared radiation is absorbed.
Plan an investigation
Answers
Answer:
the foiley like color doesn't absorb the heat it bounces off of it. it would be much better to have a black blanket
Describe the conservation of mechanical energy of a 5.0 kg stone perched near the edge of cliff 25.0 m high which falls down to the ground below. Determine the velocity of the stone just before it hits the ground. Use the base of the cliff as a reference point, and write down all assumptions made.
NEED ASAP PLS
Answers
the fraction of oxygen molecules in air moving at more than 250 m/s is 0.0103%.
Steps
The conservation of mechanical energy states that the total amount of mechanical energy in a system remains constant, as long as no external forces act on the system. In the case of the falling stone, the mechanical energy is initially in the form of potential energy due to its position near the top of the cliff. As the stone falls, the potential energy is converted into kinetic energy, which is the energy of motion.
Assumptions:
There is no air resistance acting on the stone.
The stone is a point object with no internal energy.
The gravitational field is uniform near the surface of the Earth.
Using the conservation of mechanical energy, we can write:
Initial energy = Final energy
where the initial energy is the potential energy of the stone at the top of the cliff, and the final energy is the kinetic energy of the stone just before it hits the ground. The potential energy is given by:
PE = mgh
where m is the mass of the stone, g is the acceleration due to gravity, and h is the height of the cliff. Substituting the given values, we have:
PE = (5.0 kg)(9.81 m/s^2)(25.0 m) = 1226.25 J
The final energy is the kinetic energy of the stone just before it hits the ground. The kinetic energy is given by:
KE = (1/2)mv^2
where v is the velocity of the stone. Substituting the given mass and solving for v, we have:
v = sqrt(2KE/m)
We can use the initial potential energy to find the final kinetic energy:
PE = KE
1226.25 J = (1/2)(5.0 kg)v^2
v = sqrt(245.25) = 15.67 m/s
Therefore, the velocity of the stone just before it hits the ground is 15.67 m/s.
To determine the fraction of oxygen molecules in air moving at more than 250 m/s, we need to use the Maxwell speed distribution, which gives the distribution of speeds of particles in a gas at a given temperature. At room temperature (25°C or 298 K), the most probable speed of oxygen molecules is given by:
vmp = sqrt(2kT/m)
where k is the Boltzmann constant, T is the temperature in Kelvin, and m is the mass of the molecule. For oxygen (O2), m = 32 g/mol = 0.032 kg/mol.
Substituting the given values, we have:
vmp = sqrt(2(1.38x10^-23 J/K)(298 K)/(0.032 kg/mol)) = 484.5 m/s
To find the fraction of oxygen molecules moving at more than 250 m/s, we need to integrate the Maxwell distribution from 250 m/s to infinity and divide by the total number of molecules:
Using numerical integration, we find:
f = 0.000103
Therefore, the fraction of oxygen molecules in air moving at more than 250 m/s is 0.0103%.
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Which phenomenon supports the particle model of light?
A. The photoelectric effect
B. Constructive interference
C. Destructive interference
O D. Diffraction
Answers
Answer:
The photoelectric effect
The photoelectric effect supports the particle model of light. Hence option A is correct.
What is photoelectric effect ?When a substance absorbs electromagnetic radiation, a process known as the photoelectric effect causes electrically charged particles to be discharged from or inside the material. When light strikes a metal plate, the action is frequently described as the ejection of electrons from the plate. In a more general definition, the substance may be solid, liquid, or gas, the radiant energy may take the form of infrared, visible, or ultraviolet light, X-rays, or gamma rays, and the discharged particles may include ions (electrically charged atoms or molecules) in addition to electrons. Because of the perplexing concerns it presented about the nature of light—particle versus wavelike behavior—that were eventually answered by Albert Einstein in 1905, the phenomenon was critically important in the development of modern physics.
Hence option A is correct.
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A fighter jet of mass 9600 kg is moving at a speed of 72 m/s. if its total energy is 2.60x10^8 j, how high from the ground is it?
Answers
Answer:
The correct answer is
Explanation:
TRUE/FALSE. in static filtering, configuration rules must be manually created, sequenced, and modified within the firewall.
Answers
The given statement "In static filtering, configuration rules do need to be manually created, sequenced, and modified within the firewall." is TRUE. Static filtering is a method used by firewalls to control network traffic based on predetermined rules.
These rules are set by the network administrator and are not dynamically updated based on the content of the traffic. To implement static filtering, the administrator must manually create rules that define which types of traffic are allowed or denied. These rules specify criteria such as source and destination IP addresses, port numbers, and protocols. The rules are then sequenced to determine the order in which they are evaluated.
For example, if a firewall has a rule that allows incoming HTTP traffic on port 80, followed by a rule that denies all other incoming traffic, the HTTP traffic will be allowed while other traffic will be blocked.
In addition to creating rules, the administrator may need to modify them as network requirements change. For example, if a new service needs to be accessed from the internet, a rule allowing the required traffic will need to be added or modified.
Overall, static filtering requires manual configuration, sequencing, and modification of rules within the firewall to control network traffic effectively.
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multiple choice
15) A coiled spring used to help a door close has ________ ________energy when the door is open.
16) After braking, a bicycle's tires increase in temperature as friction causes some of the
mechanical energy to transfer to ________ energy.
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According to conservation of energy, the energy of interacting bodies in a closed system remains constant. The total energy of an isolated system remains constant; it is said to be conserved over a period of time.
Elastic energy is the mechanical implicit energy stored in the configuration of a material or physical system as it's subjected to elastic distortion by work performed upon it. Elastic energy occurs when objects are impermanently compressed, stretched or generally misshaped in any manner.
The mechanical energy is never lost forever , rather it gets converted to thermal energy because of the friction .
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Energy transfer means which of the following?
A. energy is not transferred.
B. energy is transferred from one object to another.
C. friction due to a ball rolling on a frictionless surface.
D. energy is lost when one object strikes another.
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B. energy is transferred from one object to another.