The value of v₁ and v₂ is 10V and -10V respectively. This is because of Kirchoff's law. The potential is distributed in the gap and node and the potential is distributed.
The potential difference (which is the same as voltage) is equal to the amount of current multiplied by the resistance. A potential difference of one Volt is equal to one Joule of energy being used by one Coulomb of charge when it flows between two points in a circuit. **Ammeters: **An ammeter measures the flow of current that passes through it. the potential of any cell or battery is the difference between the positive and negative terminal through the terminal difference. by this primary information, we can firmly conclude that the value of v₁ and v₂ is 10V and -10V respectively. This is because of Kirchoff's law. The potential is distributed in the gap and node and the potential is distributed.
Determine v₁ and v₂ in the circuit
A. 3 ohm
B. 10 ohm
C. -10 ohm
D. 20 ohm
E. 2 ohm
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what is the breakdown for the composition of the universe by element
Answer:
Explanation: earth water fire space thats are the breakdown for the composition of the universe by element
what is the speed uuu of the object at the height of (1/2)hmax(1/2)hmax ? express your answer in terms of vvv and ggg . you may or may not use all of these quantities.
The speed of the object at the height of (1/2)hmax is expressed in terms of vvv and ggg, without using the value of g and h.
What does the word "speed" mean?Speed is what it means. the speed at which an object's location changes in any direction. The distance traveled about relation to the time it took to travel that distance is how speed is defined. Given that it just has a direction and no magnitude, speed is a scalar number.
How can we determined this?The speed of the object at the height of (1/2)hmax can be represented by the equation:
Speed = sqrt(2gh)
Where:
g = acceleration due to gravity
h = height
At the height of (1/2)hmax, the object has reached its maximum height and its speed is at its minimum, known as the "top speed." At this point, the object's vertical velocity (vvv) is equal to zero and its kinetic energy is equal to its potential energy, so we can write:
1/2mvvv^2 = mgh
Where:
m = mass of the object
By substituting the first equation into the second equation, we get:
1/2m(sqrt(2gh))^2 = mgh
Simplifying this equation, we get:
g = vvv^2 / 2h
Now, we can substitute the value of g back into the first equation:
Speed = sqrt(2gh) = sqrt(2 * (vvv^2 / 2h) * (1/2)hmax)
So, the speed of the object at the height of (1/2)hmax is:
Speed = sqrt(vvv^2 / 2)
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a spring of spring constant k is attached to a block of mass m. the spring moves the block through a displacement x. how can you calculate how much work the spring does on the block?
An endless spring A block with mass m is connected to a constant k. The block undergoes a displacement x as a result of the spring. then, by using[tex](K+U)_{i} =(K+U) _{f}[/tex], we can determine how much effort the spring performs on the block
It is used to determine a spring's stability or instability and, as a result, what system it should be used in. It reworks Hooke's Law and is mathematically expressed as k = - F/x.
where k is the spring constant, F is the force applied over x, and x is the displacement generated by the spring in N/m. Fs = -kx, where F is the spring's restoring force, k is the spring constant, and x is the displacement, is the formula utilized by the Hooke's Law Calculator.
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What advantage does a machine with a MA of 1 provide? Give an example.
Answer:
A machine that has a Mechanical Advantage (MA) of 1 offers no benefit. It does not imply that the device is perfect or that there aren't any energy losses, though.
Explanation:
A machine with an MA of 1 produces a force that is exactly equal to the force that is applied to it.
A straightforward screwdriver is an illustration of a machine having an MA of 1. The force needed to spin the screw and the force applied to the handle of the screwdriver are equal when the force is applied to the handle and is passed directly to the screw. Since the distance traveled by the handle and the screw are equal, the Mechanical
Answer:
If the fulcrum is exactly in the middle, then moving one end by 1 meter will move the other end exactly by 1 meter. This is the the machine with Mechanical advantage exactly equal to 1.
Explanation:
whenever something is too heavy to lift, a ramp can be a solution. As long as the slope of the ramp is gentle enough, and the object has something like wheels that roll, heavy weights can be lifted from here to there.
Mechanical advantage is the ratio of output to the input force. It can also be described as the ratio of load to the effort applied.
Objects with masses of 141 kg and 494 kg are separated by 0.396 m. A 74.8 kg mass is placed midway between them.
1 ) Find the magnitude of the net gravitational force exerted by the two larger masses on the 74.8 kg mass.
The value of the universal gravitational constant is 6.672 × 10−11 N · m^2 /kg^2.
Answer in units of N.
2 ) Leaving the distance between the 141 kg and the 494 kg masses fixed, at what distance from the 494 kg mass (other than infinitely remote ones) does the 74.8 kg mass experience a net force of zero?
Answer in units of m.
( 1) The net gravitational force between the 74.8 kg mass is 8.09 x 10⁻⁵ N.
( 2) The distance from the from the 494 kg mass where the middle mass experiences net zero force is 0.258 m.
What is net gravitational force on the middle mass?The net gravitational force acting on the middle mass is calculated by applying Newton's law of universal gravitation as shown below.
F = ( GmM ) / ( R² )
where;
G is universal gravitation constantm is the mass of the middle massM is the mass of the first massR is the distance of separation between the two massesThe force between the first mass and the middle mass is calculated as;
F' = ( 6.672 x 10⁻¹¹ x 141 x 74.8 ) / ( 0.198² )
F' = 1.8 x 10⁻⁵ N
The force between the third mass and the middle mass is calculated as;
F'' = ( 6.672 x 10⁻¹¹ x 494 x 74.8 ) / ( 0.198² )
F'' = 6.29 x 10⁻⁵ N
The net gravitational force on the middle mass;
F (net) = 6.29 x 10⁻⁵ N + 1.8 x 10⁻⁵ N
F ( net ) = 8.09 x 10⁻⁵ N
Let the distance of zero net force from the 141 kg mass = d.
then the distance from the 494 kg mass = 0.396 m - d
F' = ( 6.672 x 10⁻¹¹ x 141 x 74.8 ) / ( d² )
F' = 0.704 x 10⁻⁶ / d²
F'' = ( 6.672 x 10⁻¹¹ x 494 x 74.8 ) / ( 0.396 - d )²
F'' = 2.47 x 10⁻⁶ / ( 0.396 - d )²
for zero net force, the two forces must be equal
0.704 x 10⁻⁶ / d² = 2.47 x 10⁻⁶ / ( 0.396 - d )²
0.704 (0.396 - d )² = 2.47d²
(0.396 - d )² = ( 2.47d² ) / ( 0.704 )
(0.396 - d )² = 3.51d²
0.396 - d = √ ( 3.51d² )
0.396 - d = 1.87d
1.87d + d = 0.396
d (1.87 + 1) = 0.396
d (2.87) = 0.396
d = 0.396 / 2.87
d = 0.138 m
The distance from the 494 kg mass = 0.396 - 0.138 m = 0.258 m
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T/F the test-mass is referred to as m and it hangs from the test-mass riser.
False: The radius of the circular route changes when the test-mass riser is moved along the platform.
A circular route is what?
In contrast to a linear road, which follows a straight line, a circular path has a circular form or loop. It is a kind of motion that frequently occurs in mathematics, engineering, and physics. Circular routes are frequently used in engineering to explain the motion of components like wheels, gears, and pulleys.
In mathematics, rotations, orbits, circles, and other types of curves are frequently represented as circular routes. Circular routes may be employed in design, architecture, and other fields as well.
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Part B Now consider the children's linear accelerations Which of the following statements are correct? Check all that apply: View Available Hint(s) The last child in the line has the greatest tangential acceleration The last child in the line has the greatest radial acceleration.
AIl the children have the same tangential acceleration; All the children have the same radial acceleration Submit
The last child in the line has greatest radial acceleration.
Tangential acceleration is a term used to describe how the tangential velocity of a point with a particular radius changes over time. The same linear and tangential accelerations, but in the tangential direction, result in the circular motion. Tangential acceleration is the rate of change in the matter's tangential velocity in a circular path.
We have linear acceleration and angular acceleration are proportional for something in motion. If there is a circular motion, the tangential and radial components will be parallel to one another. We will always accelerate in parallel to one another. The tangential and radio accelerations are connected to the linear acceleration of a point on a spinning object. It will be our decision (b).
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As you walk away from a vertical plane mirror, your image in the mirror O decreases in height. O is always a real image, no matter how far you are from the mirror. O may or may not decrease in height, depending on where the observer is positioned. o changes from being a virtual image to a real image as you pass the focal point. is always the same height.
The vertical plane mirror is a flat, vertical surface, usually made of glass or metal.
What is virtual image?Virtual image is an optical illusion created by a lens or mirror. It is a two dimensional representation of an object which appears to be the same distance away from the lens as the original object. It is formed by the convergence of light rays that are not actually present, but seem to be originating from the image. Virtual images can be viewed on a screen or projected onto a wall. Virtual images cannot be projected onto a surface for viewing.
When you stand in front of it, the light from the object that you are looking at reflects off the mirror and creates an image of the object in the mirror. This is because light travels in straight lines and when it meets the mirror it bounces off it in the same direction.
When you are standing close to the mirror, the image of the object in the mirror is upright and appears to be the same height as the original object. This is because the light from the object is reflected off the mirror and reaches your eyes in a straight line. As you move away from the mirror, the distance between the object and the mirror increases and the light is no longer traveling in a straight line. The light is now traveling at an angle and this causes the image to appear tilted in the mirror. This tilt causes the image to appear shorter than the original object.
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A horizontal force acts on a block sliding on a horizontal surface. the force of kinetic friction between the block and the surface is 0.5 n. if the direction of the applied force is reversed, which is true?
If the direction of the applied force is reversed on a block sliding on a horizontal surface, the force of kinetic friction between the block and the surface will also be reversed.
The force of kinetic friction will now act in the opposite direction of the applied force, and its magnitude will remain the same (0.5 N). As a result, the net force acting on the block will be the difference between the applied force and the force of kinetic friction, which will determine the block's acceleration. The block will slow down and eventually stop moving, as the force of kinetic friction will be greater than the applied force in this case.
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Your question is incomplete, but most probably, the complete question is:
A horizontal force acts on a block sliding on a horizontal surface. The force of kinetic friction between the block and the surface is 0.5F. If the direction of the applied force is reversed, which is true?
The magnitude of the net force on the block increases.
The magnitude of the acceleration of the block remains the same.
The kinetic energy of the block increases.
The velocity of the block remains the same.
the windpipe of a typical whooping crane is about 5.0 ft. long. what is the lowest resonant frequency of this pipe, assuming it is closed at one end? assume a temperature of 37c.
The lowest resonant frequency of this pipe is approximately 58 Hz.
What is frequency?
Frequency is a measure of how often a particular event occurs or a certain value appears in a set of data. It is usually expressed as a number of occurrences or a percentage of the total. Frequency is a useful concept in statistics and probability theory as it can provide insight into the underlying data and help to draw conclusions about the data.
The speed of the sound is:
[tex]$v =331 \sqrt{1 + \frac{T}{273} }[/tex]
[tex]$v =331 \sqrt{1 + \frac{37}{273} }[/tex]
v = 352.72 m/s
The length of the pipe is:
L = 5.0 ft = 1.524 m
The wavelength is:
λ = 4L
= (4)(1.524)
= 6.096 m
[tex]$f = \frac{v}{\lambda}[/tex]
[tex]$ f =\frac{352.72}{6.096}[/tex]
A block of mass m is launched by a spring of negligible mass along a horizontal surface of negligible friction. The spring constant of the spring is k. The spring is initially compressed a distance x₀. The block is released from rest. Some time after the block is released and travels in the direction shown in the figure, the spring compression is [tex]x_f[/tex]. Which of the following mathematical calculations can a student use to determine the speed [tex]v_f[/tex] of the block at this new position?
the spring constant of the spring is k. the spring is initially compressed a distance x0. the block is released from rest.
What is distance and velocity?Velocity is the measure of the amount of distance an object covers in a given amount of time. Here's a word equation that expresses the relationship between distance, velocity and time: Velocity equals distance travelled divided by the time it takes to get there.
Is distance equal to speed?Speed = Distance/Time – This tells us how slow or fast an object moves. It describes the distance travelled divided by the time taken to cover the distance. Time = Distance / Speed, as the speed increases the time taken will decrease and vice versa.
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what type of chemical energy is used to drive the light independent reactions
The chemical energy used to drive the light independent reactions, also known as the Calvin cycle, is in the form of ATP and NADPH.
ATP, or adenosine triphosphate, is a high-energy molecule that stores and releases energy. It is produced during the light-dependent reactions of photosynthesis through the process of photophosphorylation. NADPH, or nicotinamide adenine dinucleotide phosphate, is another high-energy molecule that is also produced during the light-dependent reactions through the process of non-cyclic electron flow.
Both ATP and NADPH are used in the light independent reactions to power the conversion of carbon dioxide into glucose and other sugars. The energy from these molecules is used to drive the fixation of carbon dioxide by an enzyme called rubisco, which converts it into a carbohydrate called 3-phosphoglycerate. This process is the key to the synthesis of glucose and other sugars in photosynthesis.
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if you wish to store a large amount of energy in a capacitor bank, would you connect capacitors in series or parallel? explain.
It implies that as the capacitance value increases, so will the quantity of the energy. Therefore, the capacitors should be connected together in parallel in order to store more power in a capacitor bank.
What are the uses of a capacitor bank?Capacitors are used in the distribution of electric power to rectify power factor. These banks are required to offset inductive loading caused by components like electric motors & transmission lines, which causes the load to seem to be primarily resistive.
Where are the banks of capacitors?banks of distribution capacitors. Distribution capacitors are put in place at substations, on the poles, or adjacent to the load. Even though these capacitors units serve the local demand with reactive power, they might not be able to lower feeder & transformer losses.
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The Washington Monument is 169 meters tall.
A worker assigned to the restoration of the Washington Monument is checking the condition of the stone at the very top of the monument. A nickel with a mass of 0.005 kg is in her shirt pocket.
Q: If the nickel accidentally falls out of her pocket, what will happen to the gravitational potential energy (GPE) of the nickel as it falls to the ground?
The gravitational potential energy (GPE) of the nickel will increase as it falls to the ground due to the force of gravity acting on it.
When an object falls, it gains kinetic energy, which is the energy of motion. As an object falls, it gains kinetic energy at the expense of its potential energy.
The amount of GPE gained will be equal to the mass of the nickel multiplied by the acceleration due to gravity and the change in height from the worker's pocket to the ground. Specifically, the change in GPE = 0.005 kg [tex]* 9.8 m/s^2 * 169[/tex]* m. As the nickel falls it will accelerate and its kinetic energy will increase as well. The nickel will convert the potential energy into kinetic energy and also will gain velocity as it falls, reaching a terminal velocity.
When the nickel reaches the ground, all of its potential energy will have been converted into kinetic energy.
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impulse [im-puhls] [L] n. 1. the influence of a certain mood 2. a sudden urge or desire 3. a driving force caused by forward movement 4. Mechanics. a measure of momentum 5. Physiology. a wave of energy that travels along a nerve to create or stop movement 6. Electricity. a solitary, sudden flow of current in a single direction What is the meaning of impulse as it is used in the sentence below
Impulse refers to the measure of momentum.
What is impulse?
Impulse is a measure of the change in momentum of an object, and it is given by the product of force and time for which the force is applied. Mathematically, impulse is represented as the integral of force with respect to time. The impulse-momentum theorem states that the impulse applied to an object is equal to the change in momentum of the object. This means that the impulse is equal to the final momentum minus the initial momentum of the object.
As used in the sentence "The impulse applied to the ball by the racket can be calculated using the impulse-momentum theorem," impulse refers to the fourth meaning of the word as described in your question.
Specifically, it refers to a measure of momentum, which is the product of an object's mass and velocity. In this context, impulse is a vector quantity that is equal to the change in momentum of an object resulting from a force applied over a certain period of time.
The impulse-momentum theorem states that the impulse applied to an object is equal to the change in momentum of the object, and it is used in mechanics to calculate the effect of forces on moving objects.
Hence, Impulse refers to the measure of momentum.
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A student claims that the force on the sides of a tall object submerged in water is the same at all points on the object. Which of the following is evidence that indicates the student is wrong?
answer choices
The pressure of the water increases with depth, so molecules of water must, on average, exert a greater force on a surface at a greater depth.
The force exerted on one side of the object is balanced by the force exerted on the opposite side.
The buoyant force is the result of electrostatic repulsion between electrons in the molecules of an object and the liquid it is in.
The buoyant force is proportional to the volume of the liquid that the object displaces, but this does not support the student's claim that the forces on the sides are equal everywhere.
The evidence that indicates the student is wrong that the pressure of the water increases with depth, so molecules of water must, on average, exert a greater force on a surface at a greater depth.
What is the object's buoyant force?The upward force a fluid applies to an item is known as buoyant force. The buoyant force is equal to the weight of the displaced fluid, according to Archimedes' Principle. A body submerged partially or completely in a fluid appears to weigh less because of the buoyant force.
How does a buoyant object affect the amount of water it moves?The Archimedes principle states that a body submerged in a fluid experiences buoyant force equal to the weight of the fluid the body displaces.
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a car speedometer has a 8% uncertainty. what is the range of possible speeds (in km/h) when it reads 25 km/h? (there are two answers. enter the lowest value first and the highest value second. for each answer, enter a number.)
The range of possible speeds (in km/h) at the given uncertainty is 23 km/h to 27 km/h.
What is uncertainty in measurement?
Uncertainty is defined as the range of possible values within which the true value of the measurement lies.
The range of possible speeds (in km/h) when it reads 25 km/h is calculated as follows;
the uncertainty of the speed = ± 8%
The lowest speed reading = ( 100% - 8%) x 25 km/h
= ( 92 % ) x 25 km/h
= 0.92 x 25 km/h = 23 km/h
The highest speed reading = ( 100% + 8%) x 25 km/h
= ( 108 % ) x 25 km/h
= 1.08 x 25 km/h = 27 km/h
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consider a spin 1/2 particle to be in an initial state . what is the final state of the system (up to an overall irrelevant global phase) if the magnetic field is applied for a total time ?
According t the question, In general, if the magnetic field is applied for a total time T, the final state of the system will be a linear combination of the initial state and the state that would have been obtained after performing a rotation of the spin by an angle 2πT/T.
What is the linear ?
Linear equations are mathematical equations that involve one or more variables. They take the form of ax + b = 0, where a and b are constants, and x is the variable. Linear equations are used to model problems involving direct proportionality, such as a change in one variable having a proportional effect on another variable. Linear equations can be used to solve a variety of problems, including those involving geometry, algebra, and probability. They can also be used to make predictions about future events or trends. Linear equations are an important part of mathematics, and they are used in a variety of scientific and engineering fields.
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an aluminum cube with side length of 10 cm is divided into two equal pieces so that a hemi-spherical recess with diameter of 8 cm can be bored out of each of the two pieces. if the density of aluminum is 2.7 grams per cubic cm, what is the mass of the remaining metal of the two parts of the cube, to the nearest gram? (density is mass divided by volume.)
The total mass of the remaining metal of the two parts of the cube is approximately 3966 g to the nearest gram.
What is mass?The amount of matter in an object is indicated by its mass. It is typically expressed in grams, kilograms, and tonnes when using the metric system. Mass and Weight are different from one another.
The cube has a volume of 10cm x 10cm x 10cm = 1000 cm^3.
The hemi-spherical recess has a radius of 4cm, so the volume of the recess is (2/3)π(4cm) ^3 = 268.08 cm^3.
The volume of the remaining metal of each piece of the cube is (1000 cm^3 - 268.08 cm^3) = 731.92 cm^3.
So, the mass of the remaining metal of each piece is (density of aluminum) x (volume of remaining metal) = 2.7 g/cm^3 x 731.92 cm^3 = 1983.024 g.
Therefore, the total mass of the remaining metal of the two parts of the cube is 1983.024 g x 2 = 3966.048 g, which is approximately 3966 g to the nearest gram.
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the length of the displacement vector represents how far an object is what?
The length of the displacement vector represents how far an object is traveled in one direction and is therefore denoted as option C.
What is a Displacement vector?This is used in geometry and mechanics and it helps to tell how much the position of an object has changed and also includes how far you have traveled and in which direction which may be eastwards, westward etc.
It talks about both a displacement and a direction of the object and is the reason why it is regarded as a vector quantity which is often measured in meters and the value depends on how far the object is . However, it doesn't signify visibility or how it is thrown but also depicts that it travels in one direction and is therefore the reason why option C was chosen as the most appropriate choice.
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The options are:
A) is visible
B) can be stretched
C) traveled in one direction
D) can be thrown
In this experiment, optical density is measured using a _______.
spectrophotometer
thermocycler
microscope
caliper
Using a spectrophotometer, optical density is determined in the experiment.
Describe optical density.The optical density of a transparent material is a measure of how quickly light passes through the material. The degree to which any optically dense medium bends transmitted light rays toward or away from the norm is known as its optical density.
High optical density: What does that mean?The slower the wave moves through the material, the higher the optical density. By examining the material's refractive index, one can establish its optical density. How much slower a light wave would flow through the medium in comparison to how quickly it would go through vacuum is represented by the dimensionless refractive index value.
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Consider an ideal spring that has an unstretched length l_0. Assume the spring has a constant k. Suppose the spring is attached to an cart of mass m that lies on a frictionless plane that is inclined by an angle theta from the horizontal. Let g denote the gravitational constant The given quantities in this problem are l_0, m, k, theta, and g. a) The spring stretches slightly to a new length l>l_0 to hold the cart in equilibrium. Find the length l in terms of the given quantities. b) Now move the cart up along the ramp so that the spring is compressed a distance x from the unstretched length l_0. Then the cart is released from rest What is the velocity of the cart when the spring has first returned to its unstretched length l_0? c) What is the period of oscillation of the cart?
The length of the spring in equilibrium is l = l0 +(mgsin(theta)/k in terms of the given quantities
a) The length of the spring in equilibrium can be calculated using the spring's force equation, F = -k(l-l0).The force exerted by gravity on the cart is mgsin (theta), which must be equal to the force exerted by the spring in order to achieve equilibrium. Setting these two forces equal to each other and solving for l gives:
l = l0 +(mgsin(theta)/k
b) When the cart is released from rest, it will have potential energy stored in the spring. This potential energy can be converted into kinetic energy as the spring expands. The velocity of the cart when the spring has first returned to its unstretched length can be found using the conservation of energy. The potential energy stored in the spring when the cart is released is (1÷2) kx2, and the kinetic energy at the point when the spring returns to its unstretched length is (1÷2) mv². Setting these two equal to each other and solving for v gives:
sqrt(2kx÷m) = v
c) The period of oscillation of the cart is the time it takes for the cart to complete one full oscillation. T = 2pisqrt(m/k) can be used to calculate it.
2pisqrt(m÷k) = T
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i need help plssssssss
The object with the greatest inertia is 8 kg bowling ball.
option A is the correct answer.
What is Newton's first law of motion?Newton's first law of motion states that a body at rest or uniform motion in a straight line will continue in that form unless it is acted upon by an external force.
Newton's first law of motion is also called the law of inertia because it depends on the mass of the object.
The inertia of a body or an object is the measure of the reluctance of the body or object to start moving when it is at rest or to to stop moving when it is in motion.
The inertia of an object depends on the mass of the object, thus the greater the mass of an object the greater the inertia of the object and vice versa.
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true/false. Work occurs when (2 points)an applied force results in movement of an object in the same direction as the applied forcean object is subjected to balanced forces resulting in movement of the objectthe energy present is the result of the force acting on the objectthe movement of the object was caused by a force and is in the opposite direction of the force
True. Work occurs when an applied force results in movement of an object in the same direction as the applied force.
What is force?Force is an external influence that changes the motion, direction, shape, or energy of an object. Force can be described as a push or a pull and typically has both magnitude and direction. Force is a vector quantity meaning it has both magnitude and direction. Examples of forces include gravity, friction, tension, and electromagnetic forces. Gravity is the force that pulls objects towards the center of the Earth.
This is because work is the amount of energy transferred from one object to another due to the application of a force. The energy present is the result of the force acting on the object and the movement of the object is caused by the force in the same direction as the force.
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Suppose you are at the edge of a cliff and throw one ball down to the ground below and another up at the same speed. The upward-thrown ball rises and then falls to the ground below. How do the speeds of the balls compare when striking the ground
The speed of the two balls when striking the ground will be the same. Both balls will have the same initial velocity when thrown, and the only force acting on them is gravity.
What is the speed?The speed of an object is the rate of change of its position relative to a frame of reference, and is a function of time. It is a scalar quantity and is measured in meters per second (m/s). The speed of an object can be calculated by dividing the distance covered by the object by the time taken. An object's speed can be increased or decreased by applying an external force.
Here the acting acceleration is gravity
So,
v₁ - u₁ = gt
v₂ - u₂ = gt
As time and and gravity is same
v₁ - u₁ = v₂ - u₂
As Initial velocity is 0
v₁ = v₂
Thus, velocity of both the balls will be same when hitting the ground.
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A helicopter,which was assending vertically at a steady velocity of 20meter per second,released a parcel that took 20seconds to reach the ground .state the direction in which the parcel moved immediately it was released
Answer:back
Explanation:Velocity =d/t
D=vt
=20x20=400m
If a wave moves from a medium with a high wave velocity to one with a low wave velocity, which of the following CANNOT change: frequency, amplitude, wavelength, velocity, direction
When a wave move from a medium with high wave velocity to one with low wave velocity, the one that do not change is frequency.
When a wave moves from one medium to another, frequency is the only thing that remains constant, because it depends solely on the source, not the medium. Every other factors changes according to the medium.
When a wave moves from high velocity medium to low velocity medium, the velocity decreases. The direction changes, and is called refraction. From a lighter medium to denser medium, the wavelength, the waves slow down and wavelength decreases. On the boundary of the mediums, some absorptions may happen. So amplitude may decrease, or remains the same, if no external energy is provided.
So the factor that remains constant irrespective of the medium is the frequency.
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Base your answer on the weather map below, which shows the locations of a high-pressure center (H) and a low-pressure center (L) over a portion of North America. The isolines indicate surface air pressures. Which map shows the most likely location of clouds associated with these pressure centers
The 4th map(see attachment) shows the most likely location of clouds associated with these pressure centers.
What is pressure?The force applied to a substance's boundaries per unit of area is measured as pressure. The Newton per square metre (or pascal) is the accepted SI unit for pressure (Pa). Mathematically:
p = F/A
In general, the collisions between the molecules of a substance and the boundaries of the system result in pressure, also known as the force applied per unit area on the boundaries of a substance. As molecules collide with the walls, forces are generated that attempt to push the walls outward.
The pressure that a system puts on its surroundings is brought on by the forces produced by all of these collisions. In a closed system, pressure acts as a constant intensive variable. It only applies to liquid or gaseous systems.
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if the tension on the string is halved and the string is replaced by another with twice the linear density, by what factor will the speed of a wave on the string change?
The factor by which the speed of a wave on the string change is halved (1/2).
What is a string of mass's tension?The pull that is designated as tension is in that direction. As a result, the tension will point toward the string or rope and away from the mass. When a mass is hanging, the string pulls it upward, applying an upper force, which causes the tension to be on the upper side.
Tension= T' = 1/2T
Linear density = (m/L) final = 2 (m/L)
Speed of the wave = v => sqrt(T/(m/L)
=> sqrt(T/2 x 2(m/L) )
V final = 1/2sqrt(T/(m/L)
=> 1/2 times V
What does linear density mean?Mass per unit length of a strand or along the flow route of a stream of fibres is referred to as linear density.
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a 60.0 kg skier is at the top of a slope 10.0 m above the ground. what is her gravitational potential energy of the skier-earth system?
A 60.0 kg skier is at the top of a slope 10.0 m above the ground. The gravitational potential energy of the skier-earth system is 5880J.
Given,
m=60 kg
h=10m
g=9.8
P.E=mgh
=60*10*9.8
=5880J
William Rankine, a Scottish engineer, and physicist from the nineteenth century coined the term potential energy. Potential energy is classified into several types, each of which is associated with a specific type of force.
Because of its position, an object, as we know, can store energy. When a bow and arrow are drawn, some energy is stored in the bow, which is responsible for the kinetic energy gained when the bow is released.
Similarly, when a spring is displaced from its equilibrium position, it gains energy, which we see as stress in our hands when we stretch it. Potential energy is a type of energy that is created as a result of an alteration.
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