The body weighing 2 kg moves through the horizontal surface and crosses the path x = 75 cm The coefficient of friction of the body and horizontal surface is 0.8. If the kinetic energy of the body in the starting position is 16J, how much will the kinetic energy of the body be in the definitive position?
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agitate... hope this helps.......

In Chemistry, to accelerate a reaction often involves using a catalyst to increase the reaction rate without the catalyst being consumed. Acceleration in Physics refers to a change in an object's velocity, as described by Newton's first law of motion.

The term 'to accelerate' typically implies speeding up any process or reaction. In the context of Chemistry, this often refers to increasing the rate at which a chemical reaction occurs. Factors that can accelerate a reaction include stirring, increasing temperature, or adding a catalyst. A catalyst is a substance that increases the speed of a reaction without being consumed in the process. Acceleration, specifically in Physics, is defined as the change in velocity - which can be in the magnitude or direction or both. Newton's first law of motion, also known as the law of inertia, states that a body at rest remains at rest, and a body in motion remains in motion at a constant velocity unless acted upon by a net external force — implying the role of acceleration when this state is altered.

Answer:

Now since mass of reactant is equal to mass of the product after the reaction so we can say that mass conservation is applicable here

Explanation:

As we know that zinc reacts with copper sulfate

so the reaction is given as

[tex]Zn + CuSO_4 --> ZnSO_4 + Cu[/tex]

so here we have

[tex]Zn = 10.1 g[/tex]

[tex]CuSO_4 = 18.6 g[/tex]

[tex]ZnSO_4 = 20 g[/tex]

[tex]Cu = 8.7 g[/tex]

Now total mass of reactant is given as

[tex]M_1 = 10.1 + 18.6 = 28.7 g[/tex]

Mass of the product is given as

[tex]M_2 = 20 + 8.7 = 28.7 g[/tex]

Now since mass of reactant is equal to mass of the product after the reaction so we can say that mass conservation is applicable here

Answer:

True

Explanation:

Answer:

[tex]2.19\cdot 10^{13}[/tex]

Explanation:

The electron is a fundamental particle, with a charge of

[tex]e=-1.6\cdot 10^{-19}C[/tex]

which is also known as fundamental charge.

For an object having N excess electrons, the total charge on the object is

[tex]Q=Ne[/tex] (1)

where e is the charge of the electron.

For the object in this problem, its charge is

[tex]Q=+3.5\cdot 10^{-6} C[/tex]

This can be obtained by removing a negative charge equal to

[tex]Q=-3.5\cdot 10^{-6}C[/tex]

Substituting into (1) and solving for N, we can find the number of electrons:

[tex]N=\frac{Q}{e}=\frac{-3.5\cdot 10^{-6}}{-1.6\cdot 10^{-19}}=2.19\cdot 10^{13}[/tex]

letter a because 4N to the left +3N to the right = 4N left minus 3N left as you change the direction of 3N then you also change the plus into minus. the direction will always favour to which of the direction is bigger

The couch will move to the left with a net force of 1 N, as the 4 N force to the left is greater than the 3 N force to the right. This is assuming that the applied force is sufficient to overcome the frictional force that may keep the couch stationary.

The situation described in the question involves two forces acting in opposite directions on an object, which in this case is a couch. When one person pushes to the right with a force of 3 N and another person pushes to the left with a force of 4 N, the net force on the couch can be determined using the principles of Newton's second law. To find the net force, we subtract the smaller force from the larger force, giving us an overall force of 1 N to the left. Therefore, the correct answer is (a) the couch will move to the left with a force of 1 N.

However, it's important to note that actual movement depends on whether the force applied exceeds the frictional force acting on the couch. In the scenario provided, without additional information about the frictional force, we cannot definitively say that the couch will move. If the net force is sufficient to overcome static friction, then the couch will begin to move to the left. But if the frictional force is greater than the net force applied, the couch will remain stationary.

Answer:

0 J

Explanation:

The mechanical energy of a spring is given by [tex]0.5kx^{2}[/tex] where k is spring constant and x is extension of spring. Since the spring is unstretched,  its extension is zero.

#Notice that the potential energy is 0.

-Substituting spring constant,  k with 8 and extension with zero then the mechanical energy will be

[tex]0.5\times 8\times 0^{2}=0 J[/tex]

The effective resistance of many individual resistors in series is the sum of the individual resistances.

50 items in series, each with a resistance of 15 ohms, are equivalent to a single resistance of (15 x 50) = 750 ohms.

By the way . . . If one of the little bulbs in series burns out, all the others do NOT burn out. They simply get turned off and go dark, because the current can't flow through the one that did.

The total resistance of the string of fifty 15 ohm Christmas tree lights that are connected in series is 750 ohms.

The total resistance of the series resistors is determined by adding all the componenets of the resistors together.

Rt = R1 + R2 + R3 + ----

where;

Rt = 50 x (15 ohms)

Rt = 750 ohms

Thus, the total resistance of the string of fifty 15 ohm Christmas tree lights that are connected in series is 750 ohms.

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#SPJ2

Answer:

mass

Explanation:

Answer:25N/M^2

Explanation:

Force=20N Area=0.8M^2

Stress=force/area

Stress=20/0.8

Stress=25N/M^2

Answer:True

Explanation:

if you were to swim alone and something bad happen and there was none on the beach you'd be stuck out so NEVER swim alone :)

Answer:

Al2O3 + 3Mg ===》 3MgO + 2Al

Explanation:

Reaction of aluminium oxide with magnesium metal would form magnesium oxide and aluminium metal.

Balancing the stoichiometric equation, the number of atoms at the reactant must be equal to the number of atoms at the product so that law of conservation of matter must hold.

Al203 + 3Mg ====》 3MgO + 2Al

2 aluminium at reactant = 2 aluminium at product

3 oxygen at reactant = 3 oxygen at product

3 magnesium at reactant = 3 magnesium at product.

answer: 340 m/s

explanation: in this instance, the sound wave travels 340 meters in 1 second, so the speed of the wave is 340 m/s. remember, when there is a reflection, the wave doubles its distance. in other words, the distance traveled by the sound wave in 1 second is equivalent to the 170 meters down to the canyon wall plus the 170 meters back from the canyon wall.

The speed of the wave is 340 m/s. It can be calculated by dividing distance by time.

Given:

Distance = 170 meters

Time = 1 Seconds

It is defined as the ratio between distance and time.

Speed = Distance /  Time

In this instance, The sound wave travels 340 meters in 1 second, So the speed of the wave is 340 m/s.

When there is a reflection, the wave doubles its distance. In other words, the distance traveled by the sound wave in 1 second is equivalent to  170 meters down to the canyon wall plus 170 meters back from the canyon wall.

Thus, the speed of the wave is 340 m/s.

Find more information about the Speed of waves here:

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Answer:

Newton

Explanation:

Newton is the correct unit for a force

Answer:

78.4 J

Explanation:

The gravitational potential energy of an object is the energy possessed by the object due to its location in the gravitational field.

The change in gravitational potential energy of an object is given by:

[tex]\Delta U=mg\Delta h[/tex]

where:

m is the mass of the object

[tex]g=9.8 m/s^2[/tex] is the acceleration due to gravity

[tex]\Delta h[/tex] is the change in height of the object

For the mass in  this problem, we have:

m = 2 kg is the mass

[tex]\Delta h = 4 m[/tex] is the change in height

So, its change in gravitational energy is:

[tex]\Delta U=(2)(9.8)(4)=78.4 J[/tex]

Answer:

its velocity is 51, or 51.42 to be exact it would be: 51.4285714286

Answer:

-16 kg m/s

Explanation:

Momentum is a vector quantity indicating the "amount of motion" in an object.

The change in momentum of an object is given by:

[tex]\Delta p = m(v-u)[/tex]

where:

m is the mass of the object

u is its initial velocity

v is its final velocity

For the water balloon in this problem, we have:

m = 0.50 kg is the mass

u = 32 m/s is the initial velocity

v = 0 m/s (since the balloon comes to a stop)

Therefore, the change in momentum is:

[tex]\Delta p=(0.50)(0-32)=-16 kg m/s[/tex]

And the negative sign indicates that the direction is opposite to the initial velocity.

Answer:

a) 17 km

b) 9 km

Explanation:

The distance is the length of the path.

A to C: 5 km

B to C: 4 km

C to B: 4 km

B to C: 4 km

Total distance = 5 km + 4 km + 4 km + 4 km = 17 km

Displacement is the difference between the starting point and ending point.

Displacement = 9 km − 0 km = 9 km

Answer:

Explanation:

The moving charged particles in an electric current are called charge carriers. In metals, one or more electrons from each atom are loosely bound to the atom, and can move freely about within the metal. These conduction electrons are the charge carriers in metal conductors.

The flow of electrons in a direction is known as electric current. The tendency of attraction between the positive and negative charges makes electric current flow through a wire

An electrical charge, being either positive or negative, is a property that causes particles to experience force within an electric field. Electric current is the flow of these charges, driven by voltage sources such as batteries, across conductive materials. The current's strength is influenced by the applied voltage and the material's resistivity.

What is Electrical Charge and How Does it Create Electrical Current?

Electrical charge is a fundamental property of particles that causes them to experience a force when placed in an electric field. There are two types of charge, positive and negative, and like charges repel each other while opposite charges attract. This concept of charge is crucial in explaining how electric currents are created and maintained.

An electric current is the rate of flow of electric charge through a conductor, such as a wire. In metals, the charge carriers are primarily electrons, which are negatively charged particles that move through the metal's lattice when a potential difference (voltage) is applied across the conductor. This movement of charge constitutes the electric current.

Devices like batteries and generators create a potential difference in a circuit, and consequently an electrical field, which pushes the free charges to move. The amount of current that flows depends on both the voltage applied and the resistivity of the material through which charges are moving. Resistivity is a measure of how strongly a material opposes the flow of electric current, and it varies from material to material.

In different mediums, various charged particles may carry the current. In our bodies, for instance, current is carried by ions such as sodium ions (Na+), while in metal wires, it is carried by electrons. The existence of an electric current is fundamental to our technology, as it powers everything from simple torches to complex electric trains and computers, and even the neuronal activities in our brains.

Charges are responsible for creating electric fields, which can attract or repel other charges depending on their polarity. Positive charges are sources of electric fields, while negative charges act as sinks. It is this interplay between charges and electric fields that permits the generation and control of electric currents, leading to our ability to harness electricity for countless applications.

Answer:

25116 J

Explanation:

The amount of heat required to raise the temperature of a substance is given by the equation

[tex]Q=mC\Delta T[/tex]

where

m is the mass of hte substance

C is the specific heat capacity of the substance

[tex]\Delta T[/tex] is the change in temperature

For the sample of water in this problem, we have:

m = 0.20 kg is the mass

[tex]C=4186 J/kg^{\circ}C[/tex] is the specific heat of water

[tex]\Delta T=45-15=30^{\circ}C[/tex] is the increase in temperature

Therefore, the amount of heat required is

[tex]Q=(0.20)(4186)(30)=25116 J[/tex]

Answer:

When a particle or a system of particles move in a system where no external force acts, then the total linear momentum of the particle system remains constant.

Explanation:

Given data:

Total mass of the skateboarder, [tex]m_{1} = 70 \ kg[/tex]

Mass of the friend, [tex]m_{2} = 50 \ kg[/tex]

Initial velocity of the skateboarder, [tex]u_{1} = 3 \ m/s[/tex]

Initial velocity of the the friend, [tex]u_{2} = 0[/tex]

Let the new velocity of the skateboarder when his friend jumps be [tex]v[/tex].

From the conservation law of linear momentum,

[tex]m_{1}u_{1} + m_{2}u_{2} = (m_{1} + m_{2})v[/tex]

[tex]70 \times 3 + 50 \times 0 = (70 + 50)v[/tex]

[tex]\Rightarrow \ v &= 1.75 \ m/s.[/tex]

The Acceleration of  slug  would be 2 mm/hr²

Step by step Explanation:

Given of the solution

Initial velocity of the slug,(we can represent as [tex]v_{i}[/tex])  [tex]v_{i}[/tex]= 3 mm/hr

Final velocity of the slug,(we can represent as [tex]v_{f}[/tex] ) [tex]v_{f}[/tex]= 5 mm/hr

Time, t = 1 hr

Acceleration, a = ?

We know,

[tex]a = \frac{(5-3)}{1} \\\\a = 2 mm/hr^2[/tex]

Therefore, The Acceleration of  slug would be 2 mm/hr²

Answer:

Time, t = 28.22 s.

Explanation:

Given data:

Power, [tex]P = 1750 \ \rm W[/tex]

Mass, [tex]m = 315 \ kg[/tex]

Height, [tex]h = 16.0 \ m[/tex]

Let the time required to lift the piano to 16.0 m above be t.

We know that,

[tex]P = \frac{W}{t}[/tex]

[tex]P = \frac{mgh}{t}[/tex]

[tex]\Rightarrow \ t = \frac{mgh}{P}[/tex]

[tex]t = \frac{315 \times 9.80 \times 16.0}{1750}[/tex]

[tex]t = 28.22 \ s.[/tex]

It will take the motor 28.224 seconds to lift the piano to the sixth-story window.

Given the following data;

We know that acceleration due to gravity is equal to 9.8 m/s².

To find how long it will take to lift the piano to the sixth-story window;

First of all, we would have to determine the gravitational potential energy required to lift the piano up.

Mathematically, gravitational potential energy is calculated by using the formula;

[tex]G.P.E = mgh[/tex]

where:

Substituting into the formula, we have;

[tex]G.P.E = 315 \; * \; 9.8 \; * \; 16[/tex]

G.P.E = 49,392 Joules

Next, we would determine the time using the following formula;

[tex]Time = \frac{Energy}{Power}[/tex]

Substituting the values into the formula, we have;

[tex]Time = \frac{49392}{1750}[/tex]

Time = 28.224 seconds

Therefore, it will take the motor 28.224 seconds to lift the piano to the sixth-story window.

Find more on power, time and energy here: brainly.com/question/20488953

Answer:

Yes they do

Explanation:

All waves (both transverse and longitudinal) transfer energy from one point to another.

(e.g think about sound waves (longitudinal) and light waves (transverse))

100° C she can expect once the water begins to boil.

Option: B

Explanation:

The boiling point for water at 1 pressure atmosphere of sea level is 212 ° F or 100 ° C. That value isn't a fixed. Water's boiling point is dependent on the ambient pressure, which varies based on elevation. At a lower temperature, water boils as one gains altitude like getting higher on a hill, and boils at a higher temperature if one increases the atmospheric pressure of returning to or below sea level.

It also relies upon the water's purity. Water containing contaminants like salted water boils at a level higher than pure water. This effect is called acceleration of the boiling point and is one of the material's colligative features.

Answer:

option b) 100°

Explanation:

Answer: 4575N

Explanation:

For y component, W = mgcosø

W = 500×9.8cos21

W = 4574.54N

Find the diagram in the attached file

Answer:

-45.745

Explanation:

negative because it is downward

Answer:

6.75×10^13N

Explanation:

The electric force between the charges can be determined using coulombs law which states that 'the force of attraction between two charges is directly proportional to the product of the charges and inversely proportional to the square of their distance between them.

Mathematically, F = kq1q2/r² where;

q1 and q2 are the charges

r is the distance between the charges

F is the force of attraction

k is the coulombs constant

Given q1 = 5C q2 = 15C r = 10cm = 0.1m k = 9×10^9Nm²/C²

Substituting the given values in the formula we have;

F =9×10^9×5×15/0.1²

F = 6.75×10^11/0.01

F = 6.75×10^13N

Therefore the electric force between them is 6.75×10^13N

Answer:

Explanation:

momentum is written as p

p = mass * velocity

p = mv

30 km per hr = 30 * 1000 meters per 3600 seconds

velocity = 30000 meters per 3600 seconds

p = mv

p = 75 * 30000 / 3600

p = 625 kilogram per meter second

I hope my answer helps you and is correct

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The momentum of an adult female weighing 75 kg and riding a bicycle at 30 km/h (8.33 m/s) is 625 kg·m/s.

To calculate the momentum of an adult female riding a bicycle, we use the formula for linear momentum, which is momentum (p) = mass (m) × velocity (v). First, we need to convert the velocity from kilometers per hour (km/h) to meters per second (m/s) since the standard unit for velocity in physics is m/s. The conversion is as follows: 30 km/h = 30 × (1000 m/3600 s) = 8.33 m/s. The mass of the adult female is given as 75 kg.

Therefore, the momentum of the adult female riding a bicycle is:

p = m × v = 75 kg × 8.33 m/s = 625 kg·m/s.

Answer:

The correct answers are "chemical energy into electrical energy" and then "the electrical energy into light energy". Explanation: In the battery-powered flashlight, the battery supplies the chemical energy which makes the electrons to flow in the circuit and constitutes the current

Explanation:

Answer: 6m/s²

Explanation:

Acceleration = change in velocity / time

Initial velocity = 4m/s

Final velocity = 22m/s

Time = 3s

Acceleration = (22 - 4) / 3

a = 18 / 3 = 6m/s²