The acceleration of a dolly-sandbag system when mass and coefficient of kinetic friction is given is calculated to be 0.29 m/s².
Given that,
The mass of the dolly and actor combined M = 76 kg
The mass of the sandbag m = 18 kg
The coefficient of kinetic friction between the dolly and the stage floor = 0.20.
Let the acceleration is a.
From Newton's 2nd law of motion, we can write that,
ΣF = (m+M) a
mg - μMg = (m+M) a
a = g (m- μM)/ (m+M)
a = 9.8 ( 18 - 0.20×76)/(18+76)
a = 0.29 m/s².
Thus, the acceleration of the dolly-sandbag system is 0.29 m/s².
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What is the potential energy of two electrons that are separated by a distance of 3.5 x 10^-11m ?
Answer:
6.58×10⁻¹⁸ J
Explanation:
Applying
E = kq²/r.................. Equation 1
Where E = potential energy, q = charge on each electron, r = distance between the electron, k = coulomb's constant.
From the question,
Given: r = 3.5×10⁻¹¹ m,
Constant: q = 1.6×10⁻¹⁹ C, k = 8.99×10⁹ Nm²/C²
Substitute these values into equation 1
E = (1.6×10⁻¹⁹)²(8.99×10⁹)/(3.5×10⁻¹¹)
E = 6.58×10⁻¹⁸ J
A 5.00 cm tall object is placed a distance of 24 cm from a convex lens. If the image is
formed 48 cm from the lens, determine the type and height of the image?
Answer.:
Explanation:
The image is either virtual or real and the height of the image is 10cm.
To find the image type and its height, we need to know about the magnification of convex lens.
What is magnification of an image formed by lens?magnification of an image is the comparison of the image size with respect to that of object.It's the ratio of image height to that of object height.What is the mathematical formula of magnification of image?Mathematically, the magnification of an image isHeight of image/height of object or image distance(V) / object distance(U)
If the magnification is positive, image is virtual and if it's negative, the image is real.What is the magnification, if image distance is 48cm and object distance is 24 cm?Object is placed on the left of the lens and the object distance is taken as negative using sign convention.If the image is also formed on the left, the image distance is taken as negative. Corresponding magnification is -48cm/-24cm = 2. Since, the magnification is positive, so, image is virtual.But, if the image is formed on the right of the lens at 48cm, the image distance is taken as positive. So the magnification is 48cm/(-24)cm = -2. Since, the magnification is negative, so image is real.What is the image height, absolute value of magnification is 2 and object height is 5cm?Magnification = image height / object heightSo, image height = magnification × object height
= 2×5 = 10 cm
Thus, we can conclude that the image is virtual if it's formed on the left of the lens and is real if it's formed on the right of the lens. The height of the image is 10 cm.
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In a sealed container, Sarah combines a reactant with a mass of 8 grams with another reactant with a mass of 11 grams. After the reaction, what is the most reasonable prediction Sarah can make for the total mass of the products of this reaction?
6g
8g
10g
19g
which one
The most reasonable prediction Sarah can make for the total mass of the products of this reaction would be = 19g.
What is law of conservation of mass?The law of conservation of mass states that mass in neither created nor destroyed but can be changed from one form to another.
From the set up of the reaction carried out by Sarah, the container was in an enclosed medium.
Therefore since there is no loss of mass, the total mass of the products of this reaction would be = 11+8 = 19g.
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A box of weight 150 N is placed on
an inclined plane. The component
of the box's weight acting along
the plane is given by W'. What
would be the value of W", in
Newtons?
The value W' along inclined plane = (150 sin α ) N
W = m x g = 150 N --> based on case
W = weigth
m = massa
g = gravity acceleration
Fn = Normal force
Fn = m x g x cos α = W cos α = 150 N x cos α
W’ = m x g x sin α = W sin α = 150 N x sin α
Since the angle α is not known it will be still variable, so we could say that the W’ = (150 sin α ) N
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________ are designed to smother a small fire and are very useful in putting out a fire on a person.
An extinguishing agent, including such water or chemicals, is stored in a fire extinguisher. It is not intended to put out a large fire, only a small one.
How do fire extinguishers function?To burn, fire needs fuel, heat, and oxygen. In order to stop a fire from spreading, fire extinguishers use a substance to reduce the heat of the flames, smother the fuel, or cut off the oxygen supply. If used by a trained person, a portable fire extinguisher can quickly put out a small fire.
Why is the red fire extinguisher?First off, red is the color linked to both danger and fire, making fire extinguishers an obvious association. Second, red is the color that is easiest to see, particularly in darker settings like a smoke-filled
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A 16-cm-long nichrome wire is connected across the terminals of a 1.5 V battery.
What is the electric field inside the wire?
What is the current density inside the wire?
If the current in the wire is 2.0 A , what is the wire's diameter?
The electric field inside the wire is equal to 1.5 V/16 cm, or 0.09375 V/cm.
What is battery?
Battery is a device that stores energy and is capable of providing a current of electricity when connected to an electrical device. It typically consists of one or more electrochemical cells, which convert stored chemical energy into electrical energy.
The current density inside the wire is equal to 2.0 A/16 cm, or 0.125 A/cm.
The wire's diameter can be calculated using the formula I = πρd2/4,
where I is the current in the wire,
ρ is the resistivity of nichrome,
and d is the diameter of the wire.
Plugging in the values given,
we get 2.0 = π(1.1×10-6 Ω•m)d2/4, or d2 = 8.18×10-5 m.
Taking the square root of both sides, we get d = 0.028 m, or 2.8 mm.
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What is required for a force to do work on an object?
A. The force must act in the direction of an object’s motion.
B. The force must act at an angle to the direction of the object’s motion.
C. The force must act in the direction opposite to an object’s motion.
Answer: A.
Explanation: I actually did research on this question and it told me about directions so I hope this was correct.
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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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
How much work does the battery connected to the 21.0-ohm resistor perform in one minute? The voltage of the battery is 12.0V and the internal resistance of the battery is 3.00 ohm.
The work performed by a battery is 310 J according to the formula W= Pt and the provided data.
In an electrical circuit, what is the work?The formula for the electrical work is W = Q V. In this case, the electric potential, V, is expressed in volt, the electric charge, Q, is expressed in coulombs, and the work done, W.
The work performed in an electronic circuit may be computed using the formula
W=Pt,
where P=IV is the supplied electrical power and t is the time.
W= Pt =I V t=V²t/ Req
= V²t/ R + r
therefore
W= (12.0V)²(60s)/21.0Ω+3.00Ω
= 310 J
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How much time would it take a train locomotive running at 6000 Horsepower to use the
132,000,000 Joules of energy in a gallon of diesel fuel?(1 Hp = 746 Watts)
Answer:
at least a day
Explanation:
Because when you have 6000 horsepower and 132000000 joules of energy it will take a little bit of time.
It would also be easier if you had the miles per hour
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:
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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PLEASE ASAP ILL GIVE BRAINLIEST.
Answer:
applied force
Explanation:
any force where you push or pull is always applied force.
What is called solar energy?
Answer:
energy from the sun
Explanation:
the sun radiates energy known as solar energy.
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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Ginger was caring for her litter of puppies when the four curious pups spotted cat for the first time. Each of the four pups leaned their full of force in the board balanced between the puppies and the cat. How much force must Ginger apply to the other side to keep the puppies from knocking down the board? A. 8 N
B. 16 N
C. 32 N
On prevent the puppies from tearing down the board, Ginger must apply 32 N of force to the opposite side.
What is the value of total force?The total force acting on the system is equal to the acceleration of the center of mass times the system's total mass. When applied to an extended object, Newton's second law, F = ma, predicts the motion of a specific reference point for this object.
How much force is acting on an object overall?The vector sum of all forces acting on an object is known as the net force. In other words, the net force is the sum of all the forces, taking into mind that a force is a vector and that two forces that have the same magnitude but facing the opposite direction will cancel each other out.
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Calculate where an additional 15kg pile of bricks would need to be placed to balance the beam (shown below). Show all calculations.
Placing the diagonal of the square along the line of the first distance mark on the beam, place one square load, one unit of length, along the beam from the pivot. One square load should be placed on the opposite side of the pivot to roughly balance this.
Why do we employ beam balance?For calibrating masses between 10 mg and 1 kg, a beam balance is utilised. Depending on the calibre and sharpness of the knife edge used to make the pivot, a given measurement can be made with a given resolution and accuracy.
What is a balance in the body?A physical balance is essentially just a tool for gauging weight. With the aid of another object whose weight is known, it is used to determine the weight of any unknown object.
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Under certain circumstances, the grounded (neutral) conductors of a residential service ____ permitted to be sized smaller than the phase conductors.
Under certain circumstances, the grounded (neutral) conductors of a residential service are permitted to be sized smaller than the phase conductors.
What is conductors?
A material that easily permits the flow of electricity is referred to as an electrical conductor. Conductivity is the quality of conductors that enables them to conduct electricity.
Electric current is the name given to the movement of electrons through a conductor. Voltage is the amount of power necessary to cause that current to flow through the conductor.
What is phase ?
Phases are parts of a system that are mechanically separable from other parts of the system and are physically distinct from other parts of the system. types of substance. Solid, liquid, or gaseous phases can exist in a system. Strong atomic bonding and high viscosity, which produce a hard form in solids, are their distinguishing characteristics.
Therefore, Under certain circumstances, the grounded (neutral) conductors of a residential service are permitted to be sized smaller than the phase conductors.
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(Interplanetary Science) its 2 questions about the moon
The above prompt is related to Interplanetary Science or Astronomy.
1) The diagram that best represents the appearance of the Moon at position P 'When viewed from the Earth is Option A.
2) The factor that most likely caused the difference in the apparent size of the Moon in photographs A and B is: "The distance from the Earth to the Moon changed." (Option D).
What is Interplanetary Science?The study of planets and other objects in our solar system is known as interplanetary science. Telescopes, satellites, and other technologies are used by scientists to understand more about these objects and how they developed and evolved through time.
It also entails researching the possibility of life on other planets and moons, as well as learning about the solar system's past and future.
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An electric cord can be stretched to its elastic limit by a load of 3N. If a 350cm length of the cord is extended by a force of 0.5N, what will be the length of the cord when the stretching force is 2.5N?
Answer:
359cm
Explanation:
The change in length of the cord due to a stretching force of 0.5N is given by Hooke's law:
ΔL = k * ΔF
Where ΔL is the change in length, k is the spring constant and ΔF is the change in force.
Since the spring constant for the cord is 3N/cm, the change in length due to a stretching force of 0.5N is:
ΔL = (3N/cm) * (0.5N) = 1.5 cm
Since the cord is already 350cm long, the total length of the cord when the stretching force is 0.5N is 350cm + 1.5cm = 351.5cm.
To find the length of the cord when the stretching force is 2.5N, we can use the same formula:
ΔL = (3N/cm) * (2.5N) = 7.5 cm
The total length of the cord when the stretching force is 2.5N is therefore 351.5cm + 7.5cm = 359cm.
how does lightning occer in the sky
Answer:
Lightning happens when the negative charges (electrons) in the bottom of the cloud are attracted to the positive charges (protons) in the ground.
Explanation:
Hope it helps u
FOLLOW MY ACCOUNT PLS PLS
Answer:
Explanation:
Lightning happens in the sky when the negative charges electrons in the bottom of the cloud are attracted to the positive charges protons in the ground.
Enumera las funciones del Estado
Answer:
Gobernancia. ...
Compromiso con el mercado. ...
Seguridad. ...
Infraestructura. ...
Imperio de la ley. ...
Capital humano. ...
Gestión Financiera Pública. ...
Compromiso ciudadano.
Explanation:
A boy exerts a force of 225 N on a lever (Links to an external site.) to raise a 1250 N rock a distance (Links to an external site.) of 0.13 m. If the lever is frictionless, how far did the boy have to move his end of the lever
If the lever is frictionless, to raise the rock a distance of 0.13 m, then the boy has to move the lever to 0.72 m.
An external force that acts upon an object results in a motion of the object, then it is called a work done upon the object by that force.
Given that the external force on a lever is 225 N and on a rock is 1250 N. The distance of motion by the rock is 0.13 m.
Hence the work done by the lever will be equivalent to the work done by the rock to move a particular distance.
Work (Lever) = Work (Rock)
F(lever) x D (lever) = F (rock) x D (rock)
225x D(lever)= 1250 x0.13
D(lever) is 0.72 m
Hence we can conclude that the distance of the motion by the lever is 0.72 m.
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a total of 10.0j of work is done in accelerating a 20-n object from rest across a horizontal frictionless table. what is the total kinetic energy gained by the object
The total kinetic energy gained by the object when accelerating a 20-n object from rest across a horizontal frictionless table is 10.0 J.
How do you determine the total kinetic energy?To determine the total kinetic energy gained by the object, we can use the work-energy principle, which states that the work done on an object is equal to the change in kinetic energy of the object.
Work done = change in kinetic energy
W = Kf - Ki
where
W = work done (10.0 J)
Kf = final kinetic energy
Ki = initial kinetic energy (0 J, since the object is at rest)
Given the information provided, we know that a total of 10.0 J of work is done in accelerating the 20-n object from rest.
So,
Kf = W + Ki
Kf = 10.0 J + 0 J
Kf = 10.0 J
Therefore, the total kinetic energy gained by the object is 10.0 J
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A car traveling through a tunnel has kinetic energy of 32,987 J and
potential energy of 45 J, what is the total energy of the car?
Answer:
Total energy = 33032 J
Explanation:
Energy can be defined as the ability (capacity) to do work. The two (2) main types of energy are;
a. Gravitational potential energy (GPE): it is an energy possessed by an object or body due to its position above the earth.
b. Kinetic energy (KE): it is an energy possessed by an object or body due to its motion.
Furthermore, the total mechanical energy of a physical object or body is the sum of the potential energy and kinetic energy possessed by the object or body.
Mathematically, it is given by the formula;
Total mechanical energy = G.P.E + K.E
Given the following data;
Kinetic energy = 32,987 J
Potential energy = 45 J
To find the total energy;
Total energy = P.E + K.E
Total energy = 45 + 32,987
Total energy = 33032 J
Jika jarak antara kedua massa adalah x, tentukanlah letak m3 agar m3 gaya gravitasinya = 0 , jika massa m1 = ¼ m2
huh?
sorry i need the points tho sorrry
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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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 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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