Platform moves towards to west with a speed of v0/2 when the dog moves towards to east at a speed of v0, in accordance with the rule of conservation of momentum.
What is the straightforward meaning of speed?The speed at which an object's location changes in any direction. The distance travelled to the time needed to travel that distance is known as speed. Since speed only has a magnitude and no direction, it is a scalar quantity.
Is speed affected by acceleration?Acceleration is the method of changing a speed with which an object moves. If a substance's velocity does not change, it is not accelerating. Acceleration is a vector quantity.
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Two ropes are tied to a steel ring, and a student holds the free end of each rope. The students then pull on the ropes in a tug-of-war. If the forces exerted by the students are unbalanced, what happens to the ring ?
A. The ring remains at rest.
B. The ring moves at a constant velocity.
C. The ring accelerates in the direction of the net unbalanced force.
D. The ring accelerates in the direction opposite the net unbalanced force.
The ring accelerates in the direction of the net unbalanced force. Thus option C is the correct answer.
According to Newton's second law of motion, the net force acting on an object is equal to the mass of the object multiplied by its acceleration. If the forces exerted by the two students in the tug-of-war are unbalanced, there will be a net force acting on the steel ring.
The direction of this net force will be in the direction of the stronger force. As a result, the ring will accelerate in the direction of the net unbalanced force. This means that the ring will begin to move, and its velocity will change as long as the net force is applied.
Since the steel ring is accelerating, it can no longer be at rest, and it will not move at a constant velocity. The ring will move in the direction of the stronger force until the forces exerted by the students are balanced again.
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A 2.0 kg object is tied to the end of a cord and whirled in a horizontal circle of radius 4.0 m at 3.0 Hz. Determine: a) the velocity of the object. b) the acceleration of the object. c) the pull of the object. d) what happens if the cord breaks.
The rate at which an object's position changes when observed from a specific point of view and when measured against a specific unit of time is known as its velocity.
How do you find a velocity of an object?Velocity is the direction at which an object is moving and serves as a measure of the rate at which its position is changing as seen from a specific point of view and as measured by a specific unit of time (for example, 60 km/h northbound).
By dividing the amount of time it took the object to go a certain distance by the overall distance, one can calculate the object's initial velocity. V is the velocity, d is the distance, and t is the time in the equation V = d/t.
An object's velocity can alter depending on whether it moves faster or slower or in a different direction. An object can move faster, slower, or remain stationary by being pushed or pulled in one direction or the other. Or to put it another way, a thing moves because of a force. Gravity and friction both act as sorts of forces that affect how an object moves.
Therefore, the correct answers are:
a) 75 m/s
b) 1.4 x 103m/s2
c) 2.8 x 103N
d) 75 m/s tangential object flight.
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A researcher observes hydrogen emitting photons of energy 1.89 eV. What are the quantum numbers of the two states involved in the transition that emits these photons?
The quantum numbers of the 2 states involved in the transition that emits these photons of energy 1.89 eV of hydrogen is n=3 to n=2
The hydrogen atom is the simplest atom in which an electron moves in the spherically symmetric Coulomb potential of the proton. The total energy of an atom in the center of the mass system can only have discrete values for the stationary states described by the quantum numbers.
Energy of the emitted photon, ΔE=1.89eV. The total energy of a hydrogen atom is given as, En=−13.6/n^2eV, Here, n is the principal quantum number.
An electron absorbs or emits radiation in the form of discrete energy, which equals the difference in energies of the final and initial state. Mathematically, ΔE=Ef−Ei. Here, Ef is the energy of the final state and Ei is the energy of the initial state.The difference in energy when an electron makes transition from n=3 to n=2. ΔE3→2= E3−E2=(−1.51eV)−(−3.4eV)= 1.89eV.
Since, ΔE=ΔE3→2. Therefore, the electron makes a transition from n=3 to n=2.
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20 points! I was thinking B.) Scatter plot but want to check.
A student collected data about the speed of an object over time.
Which type of graph should the student use to represent the data?
Responses
circle graph
scatterplot
histogram
bar graph
Which of the following methods is used when an entire mole is removed for examination under a microscope
The method used when an entire mole is removed for examination under a microscope is called an excisional biopsy.
This method involves the surgical removal of the entire mole and some surrounding skin which is then examined under a microscope to check for any abnormal cells or signs of cancer. This method is typically used when a mole is suspected to be malignant or when it cannot be clearly diagnosed as benign through other methods such as a shave or punch biopsy.
The key benefit is that, as opposed to an incisional biopsy, when a bit of the tissue is taken to provide a diagnosis but it will likely still need to be treated later, the aberrant tissue may be identified, diagnosed, and removed in one operation.
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Drag each label to the correct location.
Identify the boundary type that is being described.
Transform boundaries, continental convergent boundaries, and oceanic convergent boundaries are the boundaries that are recorded.
How do transform boundaries work?A transform boundary is an area of a fault where two surfaces slide horizontally past one another.
What exactly is a convergent ocean boundary?An oceanic convergent boundary is the collision of two oceanic lithosphere-based plates. Even if this boundary contained the same kind of lithosphere, one of the plates would subduct beneath the other.
Transform boundaries are where crust is neither created nor destroyed at this boundary.In the region where the plates come into contact, movement along this boundary causes crumpling, lifting, and folding of the earth's crust—the continental convergent boundary.At this boundary, also known as the oceanic convergent boundary, the subduction zone frequently forms an arc of volcanic islands.To learn more about Transform boundaries here:
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The internal energy within a system associated with the motion of particles and that can be added to a substance is called _____.(1 point) electrostatic forces electrostatic forces temperature temperature thermal energy thermal energy kinetic energy
Thermal energy is the internal energy that exists in a system and is connected to the movement of the particles and can be contributed to a substance.
Describe thermal energy.The energy in such a system that regulates its temperature is referred to as thermal energy. The exchange of thermal energy is referred to as "heating." Thermodynamics, a whole field of physics, is the study of how heat is transmitted between various systems and how work is performed in the process.
Describe motion.In physics, motion is a variation in an object's position with respect to its surroundings over a predetermined amount of time. To describe how an object travelling with a specific mass moves, use the terms below: Distance. Displacement. Speed.
So-called thermal energy is the internal energy present in a system that is connected to particle motion that can be given to a substance.
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How might the ability of magnets to attract certain metals relate to the crane?
Answer:
When the elctromagnet is ON, it picks up the iron pieces from the other scrap (copper, brass, bronze, aluminium, rubber, plastic, glass etc. that is non-magnetic. Then the crane moves to the designated spot where the iron is to be dumped. Then the electromagnet is OFF and the pieces drop - that is the beauty of soft magnetic materials like iron and electromagnetism. When the current is switched off the magnetism disappears and gravity takes over….
If we used a permanent magnet, the iron pieces would be picked up, but they would be stuck to the powerful magnet and removing them would be a tough task.
Explanation:
What are the 8 electrical hazards?
Arc bursts, electrical burns, and electric shock are the three basic categories of electrical risks (the effect of blasts).
What are the common electrical hazards?Live wire contact can result in electric shock and burns.
fires caused by poor wiring.
circuits that are overloaded
Leave electrical components unprotected.
due to a lack of PPE, electrocution or burns.
explosive and flammable materials causing explosions and fires.
exposure to electricity wires above.
A reaction to an electric current running through the body is shock.
Burns are brought on by arc flashes and blasts of strong light.
Old wiring, wires, and switches can cause fires, as can malfunctioning outlets.
When explosive substance in the air is ignited by electricity, an explosion occurs.
The primary concerns connected to them are: contact with exposed live parts causing electric shock and burns (for example, exposed leads or other electrical equipment coming into contact with metal surfaces like metal flooring or roofs); and failures that could result in fires.
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At a particular speed, a jumbo jet can travel its own length in 20 seconds. At this same speed, the jumbo jet taxied completely past a 710-foot-long hangar in 70 seconds, as shown. What is the length of the jumbo jet in feet
A jumbo jet can fly its whole length in 20 seconds at a certain speed and has a 284-foot length. The big jet taxied completely past a 710-foot-long hangar in 70 seconds while travelling at the same speed.
In physics, you can get average speed by dividing the total distance travelled by the total time needed to travel that distance. Speed is the rate of change in an object's position, expressed in metres per second. The rate at which an object travels a distance is considered its speed. High speed describes an object that is travelling quickly.
P should represent the plane's length in feet.
20p = (710+p)/20p = 14200+20p 50p = 14200 p = 284ft
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The more massive that an object is, the ______ (more, less) that the object will be attracted to Earth.
More large items will attract each other as the gravitational force between them grows because gravitational force is directly proportional to the mass of both interacting objects.
What transpires when an item has a higher mass?An object's inertia increases with mass, hence it requires more force to alter its state of motion. The mass of an item, which is roughly equal to the quantity of material inside it, determines how much inertia it has.
Why does gravity increase when an item becomes bigger?Theoretically, anything with mass generates small particles known as gravitons, which is why mass and gravity are related. The gravitational attraction is caused by these gravitons. Gravitons increase with mass.
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What is the torque on the lever?
The torque of a lever is equal to the perpendicular force multiplied by the length of the lever arm, which is the distance from the fulcrum of the lever.
Where can I find torque?The formula for torque is rF=rFsin(r). Torque is, in other words, the cross product of the distance vector (the distance between the pivot point and the point at which force is applied) and the force vector, where the angle 'a' between r and F is.
What is torque, and what is its SI unit?The SI unit for torque is the Newton-metre, or kgm2sec-2. Taking into account the formula Torque = Force X Distance While distance and force are measured in meters and newtons, respectively, torque is measured in newton-meters.
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What type of resource is solar and wind?
Solar and wind are renewable resource types.
A renewable resource is an energy source that comes from nature. This is renewable and unlimited. It can be created by utilizing increasingly sophisticated technological developments so that it can become an alternative energy source.
Apart from solar and wind power, renewable energy can also be obtained from hydropower, geothermal, biomass, solar power, wind power, sea heat, waves, and tidal.
Some of the benefits of renewable resources are:
• Minimizing the effects of global warming
• Unlimited energy sources
• Save resources as well as expenses
• In several countries it can create jobs and opportunities
• Easier and cheaper maintenance
• Some technologies are easy to implement in remote areas.
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What is dynamic flexibility example?
Dynamic flexibility example is a swimmer may circle their arms before getting into the water.
What is dynamics flexibility?
A person's absolute range of motion that is possible with movement is referred to as dynamic flexibility. Alternatively put, the greatest range of motion is the farthest you can bend, turn, or reach utilizing velocity and momentum. Some people use the terms ballistic or functional flexibility to describe dynamic flexibility.Prior to a workout or any type of activity, dynamic stretching is a fantastic approach to improving flexibility and engaging key muscles. The benefits will help you perform at your best as an athlete, thus it should always be done before any activity.Dynamic stretching involves regulated movements that get your muscles, ligaments, and other soft tissues ready for action and safety.To learn more about dynamics flexibility refer to:
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A hand pump suitable for inflating a football has a cylinder which is 0.24m in length and an internal cross-sectional area of 5.0 x 10 -4 m 2 . To inflate the football the pump handle is pushed in and air is pumped through a one-way valve. The valve opens to let air in to the ball when the air pressure in the pump has reached 150 000 pa. (Assume the air temperature remains constant}
a) If the pressure in the pump is initially 100 000 pa, calculate how far the piston must be pushed inwards before the one way valves opens.
(b) When the one-way valve opens the total pressure in the cylinder will be 150 000 pa. What force will be exerted on the piston by the air in the cylinder?
The distance the piston needs to travel for the valve to open is equal to the applied force divided by the area, which is equal to 0.1 m.
What is applied force?
Applied force is a type of force that is applied to an object or system in order to cause it to move, accelerate, or change its shape. This type of force is often generated by machines and other devices, and can also be exerted by humans.
Applied force can also be used to counter other forces, such as gravity, friction, and inertia. Applied force is measured in newtons (N).
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Light demonstrates the characteristics of _______________. particles only waves only both photons and particles both waves and particles
Both the features of waves and particles can be seen in light.only photons and particles only photons and particles, only waves.
Photons are they both waves and particles?Both a wave as well as a particle description of light are possible.The dual character of light has been highlighted in particular by two investigations.When we consider that light is composed of tiny particles, we refer to those particles as "photons."
What are waves and particles both?The following is the image for 'photons & particles combining waves and particles'.While electromagnetic radiation behaves both like a wave and a particle at the same time, it propagates according to linear wave equations and can only be released or absorbed in discrete pieces.
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Find the area of a circle with a radius of 70 centimetres
Answer:
A≈15393.8cm²
Explanation:
Answer:
15,386 cm
Explanation:
A=3.14*70*70
A 2kg block i attached to a pring for which k=200n/m it i held at an extenion of 5cm and then releaed at t=0. A, Find the diplacement a a function of time?
B,the velocity when X= A/2
C, the acceleration when X=A/2
D, the total energy when X=A/2
Accurate choice is (A) In this case, m=2kg,k=50Nm 1, and A=5cm=0.05m. Block SHM executes. its angular frequency is 1. Because the time is measured from the equilibrium position, its displacement at any time t may be calculated using the formula x=Asint=0.05sin5tm.
Oscillation and vibration: what are they?Back and forth motion is described by the terms oscillation and vibration. Oscillation is typically used for slower motion, while "vibration" is typically used for action that is fairly quick. However, they have similar traits, hence in this book, the two terms will be used interchangeably.
What is motion-induced oscillation?Periodic or oscillatory motion is defined as a motion that repeats itself. Due to a restoring force, an object in such motion oscillates about an equilibrium position.
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What is the total distance the particle travels from t 0 to t 4?
the whole distance is five. The main point is that you must be aware of if and when the particle reverses course.
In order to determine the velocity, differentiate the displacement and set it to zero.
It is obvious that at t=1, the velocity is zero.
S=3 is the starting location at time t=0. At t=1,s=2 \s.
The total distance traveled is 1.
The additional distance traveled is 62=4 at time t=3 and s=6.
Thus, the whole distance is five.
L=30|s′(t)|dt=30|2t2|dt=1022tdt+312t2dt=5 is the length of the image of s|[0,3] and represents the total distance traveled between t=0 and t=3. .
When calculating the traveled distance of a particle satisfying the law of motion s(t) between t=a and t=b, another method that can be used if you are unfamiliar with the arc length formula is to first determine the critical points in (a,b), such as t1tk, and then multiply those values by the following formula: |s(t1)s(a)|+|s(t2)s(t0)|++|s(b) Since there is just one critical moment in your particular scenario, t=1, L=|s(1)s(0)|+|s(3)s(1)|=1+4.
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According to the graph, the velocity is
approximately:
Position x (m)
4
S
1 2 3 4
Timet (5)
A. 1.0 m/s
B. 1.5 m/s
C. -1.0 m/s
D. -0.50 m/s
An experiment with a comb, rabbit fur and paper confeti was conducted. The comb was rubed against the fur and then was put next to paper confeti. The confeti sticks. Then the fur was put next to it. What happened to the fur and confeti?
Answer:
Static electricity, specifically electrostatic attraction has occurred.
Explanation:
This phenomenon is known as static electricity, which involves the buildup of electric charges on the surface of a material. It can occur when two materials come into contact and then separate, transferring electrons from one material to the other. When you rub the comb against the rabbit fur, you transfer some of the electrons from the fur to the comb, leaving the fur with a positive charge and the comb with a negative charge. This charge separation creates an electric field around the comb and the fur. When you bring the comb and fur near the paper confetti, the negatively charged electrons in the confetti are attracted to the positive charge on the fur and the confetti sticks to the fur. This process is known as electrostatic attraction.
An object is dropped from the edge of a cliff and is moving at 26.5 m/s just before it hits the ground. How high is the cliff
Here initial speed u=0m/s final speed v=26.5 m/s and acceleration due to gravity g=9.81 m/s^2
CalculationWhere:
m = mass of the object (kg)
g = acceleration due to gravity (9.8 m/s^2)
h = height of the cliff (m)
We know the velocity of the object just before it hits the ground, which is 26.5 m/s. We can use this velocity to calculate the kinetic energy of the object just before it hits the ground.
KE = (1/2)mv^2
As the object is dropped from the cliff, its initial potential energy is converted to kinetic energy. Therefore, the initial potential energy is equal to the final kinetic energy.
GPE = KE
mgh = (1/2)mv^2
We can solve for h by rearranging the equation and substituting the known values for GPE, KE, m, and g.
How can I determine the speed of a falling object before it reaches the ground?Simply multiply the acceleration of gravity by the period of time since the object was released to determine the object's speed (or velocity). In other words, velocity is equal to -9.81 m/s2 * time, or V = gt. The item is just traveling downwards when there is a negative sign.
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DO NOT ANSWER TO GET POINTS BC I WILL BAN YOUR ACCOUNT
Answer:
diffraction
Explanation:
diffraction - the spreading out of waves when they go through a gap, or past the edge of a barrier.
Answer:
diffraction
Explanation:
how will u ban my account? tsk smh
What is an unbalanced force. in your own words but be more detailed.
Answer:
An unbalanced force is a force that causes an object's state of motion to change. In other words, unbalanced forces are the things that make objects speed up or slow down.
Explanation:
(self-explanatory)
Unbalanced forces are the forces which are not balanced. The two or more forces which are not equal in magnitude are called as unbalanced forces. If the forces acting on an object are balanced the the total force is zero as these forces cut each other out. Only when the forces are unbalanced, it causes a change in the the speed of the object, its shape, or the direction of its motion.
If a train starts from rest and after 0.5 hours travels at a speed of 75 km/hr, what is its
acceleration?
Answer:
150 km/hr²
Explanation:
The data for the motion of the train includes;
The train starts from rest, therefore, the initial velocity of the train, u = 0 km/hr
The speed of the train after 0.5 hours, v = 75 km/hr
The change in time during the motion of the train, Δt = 0.5 hours
The acceleration, 'a', is the rate of change of velocity with time;
[tex]a = \dfrac{\Delta v}{\Delta t} = \dfrac{v - u}{\Delta t}[/tex]
Therefore, we have;
a = (75 km/hr - 0 km/hr)/(0.5 hr) = 150 km/hr²
a = 150 km/hr² = 150 km/hr² × 1,000 m/km × hr²/(3,600 s)² = 5/432 m/s²
The acceleration of the train, a = 150 km/hr² = 5/432 m/s².
What is the amount of torque produced if the angle between the force and the lever arm is zero?
The amount of torque produced if the angle between the force and the lever arm is zero is zero.
The formula for torque is:
Torque (τ) = Force (F) x Lever arm (r) x sin(θ)
This is because torque is defined as the product of force and the perpendicular distance from the line of action of the force to the axis of rotation. When the angle between the force and the lever arm is zero, the force is acting parallel to the lever arm, meaning that there is no perpendicular distance between the force and the axis of rotation, resulting in a torque of zero. In other words, the torque is zero when the force is applied in the same direction as the lever arm.
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HELP HELP HELP HELP HELP HELP HELP HELP
IM SO SAD ANF SUCH A FAILLURE
Answer:
48W
Explanation:
Ok so, the power formula is P= V*I. I plugged in the voltage and current to get P=(6V)(8A).
A.) P=48W.
B.) Knowing this, It isn't working correctly. It's supposed to be 60W but it's 45W.
There must be some type of resistor throwing it off or something but the answer is no!
hope this helps!!
What is the combined resistance of 5ohms wire arranged in series with a parallel arrangement of 4ohms and 6ohms wires
No link or I'll report you
Answer:
This is a very straightforward problem, and not too difficult to do in your head. If we have two nearly equal resistances, the series resistance (Rs) is twice the average value (midpoint between the two) and the parallel resistance Rp) is approximately equal to half the midpoint value. So a rough initial guess might be 12 and 13 ohms, where Rs is 25 ohms but Rp is approximately 6.25 ohms. Since Rp needs to be lower, we can play around with resistor values. Here’s an easy shortcut:
Let’s start with the equation for two parallel resistors:
Rp = (R1 * R2)/(R1 + R2)
Since Rs = R1 + R2,
Rp = (R1 * R2)/Rs.
We can rewrite this as
Rp * Rs = R1 * R2
Plugging in our numbers (Rp = 6, Rs = 25), we see that R1 + R2 = 150. What two numbers in the vicinity of 12 and 13 have the product of 150 and a sum of 25? Immediately 10 and 15 come to mind! Easy enough!
A block-spring system vibrating on a frictionless, horizontal surface with an amplitude of 6.0 cm has a total energy of 12 J. If the block is replaced by one having twice the mass of the original block and the amplitude of the motion is again 6.0 cm, what is the energy of the more massive system
In this spring-mass system, the total energy equals the elastic potential energy at the moment the mass is temporarily at rest at x = A = 6 cm (i.e., at the extreme ends of the simple harmonic motion).
Thus, E kA2 2 and we see that as long as the spring constant k and the amplitude A remain unchanged,
the total energy is unchanged. Hence, the energy is still 12 J.
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Just as a light-year is the distance that light can travel in 1 year, we define a light-second as the distance that light can travel in 1 second, a light-minute as the distance that light can travel in 1 minute, and so on. Calculate the distance in both kilometers and miles represented by each of the following:
Approximately 5.878 x 1012 miles or 9.461 x 1015 meters, a light-year is the maximum distance light can travel in a single year..
What is light year and calculate the distance in both kilometers and miles?A light year is the distance light travels in one year, approximately 9.461 x 10^15 meters or 5.878 x 10^12 miles.A light-second is the distance that light can travel in one second, which is approximately 299,792,458 meters or approximately 186,282.397 miles.A light-minute is the distance that light can travel in one minute, which is approximately 17,987,000,000 meters or approximately 11,162,913.12 miles.A light-hour is the distance that light can travel in one hour, which is approximately 1,079,000,000,000 meters or approximately 669,573,787.2 miles.A light-day is the distance that light can travel in one day, which is approximately 25,902,000,000,000 meters or approximately 16,093,441,632 miles.A light-year is the distance that light can travel in one year, which is approximately 9.461 x 10^15 meters or approximately 5.878 x 10^12 miles.To learn more about light year refer:
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