11) a truck with momentum 40,000 kg * m/s comes to rest and then reverses direction and now has momentum of -40,000 kg * m/s. what is the change in momentum

Answer:

If the lamps are in parallel then 6.0 V is the voltage accross each lamp:

R = V / I     Ohm's Law

R1 = 6 V / .1 A = 60 ohms

R2 = 6 V / .2 A = 30 ohms

1 / R = 1 / R1 + 1 / R2       resistance of parallel resistors

R = R1 R2 / (R1 + R2) = 30 * 60 / (30 + 60) = 1800 / 90 = 20 ohms

False, as going faster than the posted speed limit in order to merge onto a highway is not permissible.

When merging into the motorway, drive at or near the speed of the other vehicles. It's fine if you move a bit slower, but the goal is to prevent disturbing traffic flow. Use your time on the ramp or in the merging lane to gain speed until you can smoothly merge into traffic.

When entering the on ramp, a vehicle must strive to accelerate in order to safely merge into the highway. While accelerating, the motorist should engage their turn signal so that oncoming traffic may notice their intentions. This may give a car on the highway enough time to move lanes to let you pass.

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Her initial acceleration must rise as a result of a decrease in moment of inertia in order to maintain the same angular momentum. What happening to the wrestler's kinetic energy during this phase. Increased kinetic energy.

Describe kinetic energy. An item accumulates kinetic energy when work, which involves the transferring of energy, be done on it by exerting a net force.

The relationship between kinetic energy and an object's mass and unit of its velocity is direct: K.E. = 0.5 m v2. The kinetic energy is measured in kilograms-meters squared per real - time data if the mass is measured in kilograms and the velocity is measured in meters per second.

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(a) The difference in temperature between these two planets is 17.6 °C.

(b) The expression of the temperature difference in Celsius is 17.8 °C.

The result is obtained by the formula for temperature conversion.

x °F = [5/9 (x - 32)] °C

x K = (x - 273.15) °C

(a) The average daytime temperature on Earth and Jupiter are 72°F and 313 K. Find the difference in temperature in Celsius!

We convert the two temperatures to Celsius.

72 °F = [5/9 (72 - 32)] °C

72 °F = [5/9 (40)] °C

72 °F = 22.22 °C

313 K = (313 - 273.15) °C

313 K = 39.85 °C

The temperature difference on Earth and Jupiter is

39.85 °C - 22.22 °C = 17,63 ≈ 17.6 °C

(b) If the temperature difference between day and night in Los Angeles is winter is 32 °F, find the expression in °C!

The temperature range of Celsius is 100 degrees and the temperature range of Fahrenheit is 180. If Δx in Fahrenheit is 32, Δx in Celsius is

x/32 = 100/180

x = (32×100)/180

x = 320/18

x = 17.8 °C

Hence, the temperature difference between the two planets is 17.6 °C and the between day and night in Los Angeles is 17.8 °C.

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a) The energy is stored in the capacitor is 2.40825x10⁻⁷J

b) The required work must be done to pull the plates apart to a distance of 2.0 mm is 2.41 x 10⁻⁷J.

When an earthed conductor is brought close to a conductor, its capacitance increases noticeably. This is how a capacitor operates. A capacitor therefore consists of two plates with equal and opposite charges that are spaced apart.

(a) d = diameter = 6.4cm = 0.064m

A = Area of each plate of the capacitor = (0.25) \πd² = (0.25) (3.14)(0.064)² = 0.00322 m²

d = the plates being separated = 1 mm = 1 x 10⁻³ m

The capacitor's capacitance is given as

C = ε₀ A/d

C = (8.85 x 10⁻¹²)(0.00322)/(1 x 10⁻³)

C = 2.85 x 10⁻¹¹ F

V  = potential difference = 130 Volts

The capacitor's energy is described as

U = (0.5) CV²

U = (0.5) (2.85 x 10⁻¹¹)(130)²

U = 2.40825 x 10⁻⁷J

b) Q = C V

Q = (2.85 x 10⁻¹¹)(130)

Q = 3.705 x 10⁻⁹ C

d' = new distance = 2 mm = 0.002 m

The capacitor's new capacitance is given as

C' = ε₀A/d'

C' = (8.85 x 10⁻¹²)(0.00322)/(2 x 10⁻³)

C' = 1.42485 x 10⁻¹¹ F

The new capacitor's energy storage capacity is given as

U' = (0.5) Q₂/C'

U' = (0.5) (3.705 x 10⁻⁹)²/(1.42485 x 10⁻¹¹)

U' = 4.82x 10⁻⁷J

The energy stored in the capacitor before and after the plates are pulled apart produces the same amount of work.

W = U' - U

W = (4.82 x 10⁻⁷) - (2.40825 x 10⁻⁷)

W' = 2.41 x 10⁻⁷J.

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D. At the highest point of its path. at what point does the ball have the most energy.

What is path?

Path is a route or a way between two points. It is usually a line or a sequence of steps that one can take to get from one location to another. Paths can be physical, Path is a sequence of steps or actions that lead to a desired result or outcome. It is a plan or set of instructions that someone can follow to achieve a goal. Paths can be mental, physical, or spiritual in nature, and often involve making decisions and taking risks.

such as a path in a park or a street; they can also be abstract, such as a path of thoughts or a path to success. Paths can also refer to a journey or a route taken to reach a particular destination.

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If one block is 310 feet, he will travel 1,315.21 feet if he goes directly to school.

The British imperial and American customary systems of measurement both use the foot as a unit of length (standard symbol: ft). One alternate symbol that is frequently used is the prime symbol, ′. Since the International Yard and Pound Agreement of 1959, one foot is precisely equal to 0.3048 metres. One foot equals 12 inches in both customary and imperial units, while one yard equals three feet.

The "foot" has historically been a component of numerous regional systems of units, including the Greek, Roman, Chinese, French, and English systems. It varied in length from nation to nation, city to city, and occasionally trade to trade. Its length was typically between 250 mm and 335 mm, and it was typically, but not always, divided into 12 inches.

Given that:

Total block in north = 3

Total block in west = 3

1 block = 310 feet

Then,

Total distance in north = 3 × 310 = 930 feet

Total distance in west = 3 × 310 = 930 feet

Distance travelled by Drew = √(Total distance in north² + Total distance in west²)

Distance travelled by Drew = √(930² + 930²)

Distance travelled by Drew = √(864,900 + 864,900)

Distance travelled by Drew = √1,729,800

Distance travelled by Drew = 1,315.21 feet

Thus, If one block is 310 feet, he will travel 1,315.21 feet if he goes directly to school.

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A force of constant direction and constant magnitude Fis exerted on the disk. A solid disk of mass M radius R and rotational inertia I is free to rotate.

Direction is defined as the path that something takes, the path that must be taken to reach a specific place, the way in which something is starting to develop or the way you are facing. An example of direction is when you go right instead of left.

Think about and visualise the route. Jot down short notes. Check over the route  your mind again, to make sure your steps are logical and nothing is left out. Plan what direction, distance and landmark words to use.

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Solar radiation is the source of energy driving the circulation pattern.

Changes in solar output have been hypothesized to have an impact on our climate, both directly by altering the pace at which the Earth and atmosphere are heated by the sun and indirectly by altering the mechanisms that cause clouds to form.

Insolation, or the quantity of solar radiation received on a certain surface area over a particular period of time, is largely influenced by latitude, climate, and weather patterns. In general, locations with dry climates and lower latitudes get more insolation than other places.

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(A) show the progression of her motion over time, (B) show the forces acting on the player's body, (C) The force of the ground pushing against her feet, (D) These forces would include her weight (directed downward), and air resistance (directed upward).

A. A motion diagram for the basketball player's motion while she is still in contact with the floor would show her starting at a stationary position, then accelerating upward as she pushes off the ground. The diagram would show the progression of her motion over time, including her velocity and acceleration.

B. A force identification diagram while she is still in contact with the floor would show the forces acting on the player's body, including her weight (which would be directed downward), the force of the ground pushing against her feet (directed upward), and the force she exerts on the ground (directed downward).

C. A free body diagram while she is still in contact with the floor would show the basketball player as a single point or object, with arrows pointing in the direction of the forces acting on her body. These forces would include her weight (directed downward), the force of the ground pushing against her feet (directed upward), and the force she exerts on the ground (directed downward).

D. A free body diagram for after she leaves the floor would show the basketball player as a single point or object, with arrows pointing in the direction of the forces acting on her body. These forces would include her weight (directed downward), and air resistance (directed upward). Once she leaves the ground, she is no longer in contact with the floor, so the ground reaction force would no longer act on her.

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20,000 bullets would have to be fired to make the railroad car move with a velocity of 1 m/s.

The rate and direction of motion are measured by a vector known as velocity.

We need to calculate the total impulse of the bullets and compare it to the force required to accelerate the railroad car to that velocity.

The impulse (change in momentum) of a bullet is equal to its mass times its velocity. So, for a 0.020 kg bullet with a velocity of 300 m/s, the impulse is:

0.020 kg * 300 m/s = 6 Ns

To calculate the force required to accelerate the railroad car, we use the equation:

force = mass * acceleration

Calculate the acceleration required to reach that velocity.

acceleration = (1-0) m/s^2 / 1 s = 1 m/s^2

force = mass * acceleration = 120,000 kg * 1 m/s^2 = 120,000 N

impulse = force * time = 120,000 N * 1 s = 120,000 Ns

To determine how many bullets are needed:

number of bullets = impulse / (mass * velocity) = 120,000 Ns / (0.020 kg * 300 m/s)

number of bullets = 120,000 Ns / 6 Ns = 20,000 bullets

So, 20,000 bullets would have to be fired to make the railroad car move with a velocity of 1 m/s.

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Common examples of waves include light, sound, and ocean waves. Since sound and water waves are mechanical waves, they must travel through a medium.

There are three categories based on how energy is directed and how particles are moving: wave mechanics electronic waves. atomic waves.

For mechanical waves, longitudinal waves and transverse waves are the two main types of wave motion. The animations that follow demonstrate both varieties of waves and highlight how the movement of the wave differs from that of the particles in the medium it travels through.

Transverse ocean waves are used for many leisure activities, including swimming and surfing. They can also be used to produce renewable electricity using the motion of the waves.

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The time this maneuver takes 1/10 seconds for the gymnast to complete this maneuver.

What is maneuver?

Maneuver is a military term used to describe a movement or series of movements that are employed to gain an advantage or tactical advantage over an opponent. It is often used to describe a series of tactical moves that are used in a battle or war. Maneuvering can involve a number of different strategies, including outflanking, encirclement, diversionary tactics, and other forms of strategic movement. Maneuvering can also include tactical decisions such as selecting a site or location for a battle to take place or selecting a group of troops to attack or defend a particular area.

The time this maneuver takes can be determined using the equation:

Time = (Angular Displacement) / (Angular Velocity)  

In this case, the angular displacement is one-half of a revolution, or π radians. The angular velocity is 5.00 rev/s, which is equivalent to 5.00 x 2π = 10π rad/s.

Time = (π) / (10π)

Time = 1/10 seconds

Therefore, it takes 1/10 seconds for the gymnast to complete this maneuver.

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-25.83 m/s2. an unwary football player collides with a padded goalpost while running at a velocity of 8.70 m/s and comes to a full stop after compressing the padding and his body 0.360 m.

what is velocity ?

Velocity is also important in other branches of physics, such as fluid dynamics, where it is used to describe the speed and direction of a fluid flow. In astronomy, velocity is used to describe the speed and direction of stars and galaxies.

In physics, velocity is usually expressed in terms of meters per second (m/s). Other units, such as kilometers per hour (km/h) and miles per hour (mph) can also be used.

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The distance between two airplanes that carry charges will be by coulombs law 28.83 meters.

An electric force is produced when two charged particles are present. The forces will be greater if you have larger charges. These two concepts, along with the knowledge that charges can attract and repel one another, can help you comprehend Coulomb's Law. The equation calculates the electrical forces acting on two objects.

Three guidelines to keep in mind when dealing with charges: Positive charges push away one another. Repulsion between negative charges. Charges that are in opposition to one another attract.

we know that from coulombs law;

F=(q1*q2)/r^2

q1= -5.0 c

q2=1.0 c

F= 6*10^3

from the above formula,

r^2=(q1*q2)/F

r= 28.83 meters

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The greatest positive acceleration occurs at the midpoint of the interval, when the particle is changing velocity most rapidly.

Velocity is a measure of the rate of change of an object's position over a period of time. It is a vector quantity, which means it has both magnitude (or size) and direction. Velocity is usually expressed in terms of distance traveled per unit of time, such as meters per second (m/s). Velocity can be determined by dividing the distance traveled by the time taken. For example, if an object travels 20 meters in 5 seconds, its velocity would be 4 m/s. Velocity can also be calculated by taking the derivative of the object's position with respect to time.

The particle will achieve its greatest positive acceleration at the midpoint of the interval, at t = b/2.
This is because the acceleration is greatest when the velocity is changing most rapidly.
At the beginning of the interval, the particle has zero velocity, so it has no acceleration.
At the end of the interval, the particle has reached its maximum velocity, and the rate of change of velocity is zero, so it has no acceleration. Therefore, the greatest positive acceleration occurs at the midpoint of the interval, when the particle is changing velocity most rapidly.

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The energy density in the magnetic field of the wave is marked down as

1/2 (Bo sin (ka-wt))^2/μo.

The quantity of energy that can be held in a specific system, substance, or area of space is known as its energy density. Energy per volume or mass can be used to measure energy density. A system or material has more energy stored in it when its energy density is higher.

Ub => energy density in the magnetic field => 1/2 B^2/μo

             μo => permeability of free space

Ub => 1/2 (Bo sin (ka-wt))^2/μo

When an electric field engages with a magnetic field, electromagnetic waves arise. Thus, they are referred to as "electromagnetic" waves. An electromagnetic wave's electric and magnetic fields are perpendicular to one another (at right angles).

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On Venus's surface, the acceleration brought on by gravity is 0.90495(gE). The acceleration brought on by a planet's gravity.

However, gravity is a force in a more general sense since it symbolizes the interaction that takes place when two masses are close to one another. Gravitational effects are fundamentally caused by the stretching of spacetime and the motion of things through the stretched spacetime. The effect, nevertheless, seems to be the result of using force.

Gravity only comes in one variety. In nature, there is only one form of gravity. According to their masses and the separation between their centers, there is only one kind of gravitational force that draws the two bodies together. Gravity is the weakest force known to exist in nature and is a form of central force.

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According to the information provided, it is 80 cm away from the converging lens on the other side of the item. The picture is 4 cm tall when inverted, or -4 cm.

Diverging lenses are concave, whereas convergent lenses are convex. Diverging lenses diverge the material falling on their surface rather of focusing it to gather at a single point, whereas convergent lenses converged & focus the light beam to do so. When parallel light beams strike a concave lens, they diverge when they travel through the lens and never come together at a single spot. They are known as diverging lenses for this reason.

Knowing that 1/f = 1/v - 1/u

Therefore u = -80, f = 40, v = 80

As a result, it is 80 cm away from the convergent lens on the opposite side of the object.

The picture is 4 cm tall when inverted, or -4 cm.

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The acceleration is directed radially toward the center of the circle.

The centripetal acceleration a(centripetal) has a magnitude equal to the square of the body's speed(v) along the wind divided by the distance(r) from the center of the circle to the moving body; that is,

a(centripetal) = v ²/r.

The tangential acceleration formula is a(tangential) = r α, where(α) is the angular acceleration, and(r) is the compass of the circle. It's derived from the fact that bow length is the compass of the circle multiplied by the angle in radians.

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Kinetic energy will the ball acquire from the bat is 1.0 x 102 J (option a).

Which four forms of friction are there?

The force that prevents one solid item from moving across another is known as friction. Static friction, sliding friction, rolling friction, and fluid friction are the four main categories of friction.

What leads to conflict?

Although friction is assumed to be created by the interactions between the microscopic bumps on surfaces when they rub against each other, scientists are not entirely sure what causes it. It is challenging for the surfaces to slide over one another because the bumps on each surface bend and exert stress on one another.

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Using conservation of energy, find the maximum height hmax to which the object will rise hmax = (v^2)/(2*g)

What is energy?

Energy is the ability to do work, or the capacity to produce a desired effect. It is the ability to be used or transferred from one form to another. Energy exists in many forms, including thermal, chemical, electrical, mechanical, and electromagnetic.

It is an essential resource for powering the world, enabling modern life and economic development. Energy can be converted from one form to another, and harnessed to do work. Examples include the conversion of sunlight into electrical energy, the conversion of coal into heat energy, and the conversion of wind into mechanical energy.

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According to the decreasing efficiency of space in the structure, crystal lattice structures are in the order of Hexagonal close packing, Face centered cubic, Body centered cubic and simple cubic.

A unit cell of crystalline structure can be defined as the simplest repeating unit. All the classification of crystalline structure are based on these unit cells.

In simple cubic, the layers are arranged one above the other, while we examine the basic cubic structure, the atoms are present only on corners of the cube. It has a packing efficiency of 54% .

For body centered cubic, the packaging is more efficient, 68%. The atoms in a layer do not touch each other, but touches 4 atoms from above and 4 from below layers.

For Face centered cubic, packing efficiency is 74%. The second layer is packed in the indentation of the first layer, and third on indentation of second. Here atoms are packed as closely as possible.

For hexagonal close packing layers are packed such that the spheres overlay spheres of the previous layer. It also have a packing efficiency of 74%.

So the decreasing order is Hexagonal close packing > Face centered cubic > body centered cubic > simple cubic.

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The equal mass of blocks are released from the same vertical position does not produce tension whereas, released from different position causes acceleration due to tension developed in the string.

An internal force is responsible for the string's tension. Due to the fact that it has no impact on the system, it need not be taken into account. If the string were extensible, it would be necessary to account for this force, for example by incorporating the elastic potential energy the string contains.

Several pulleys or sheaves installed on a single frame make up a block. Tackle is a grouping of blocks with a rope woven through the pulleys. Reeving is the process of threading cables or ropes through obstacles, and a threaded block and tackle is referred to as "rove."

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Explanation:

The force of gravity on a woman who weighs 926 N on the surface of the earth is 926 N. The weight of an object is a measure of the force exerted on the object due to gravity, and is equal to the mass of the object multiplied by the acceleration due to gravity. On the surface of the Earth, the acceleration due to gravity is approximately 9.8 m/s^2.

Answer:926N

Explanation:

Force=926N.

The units of force are in N (Newtons). The units of weight are in Kg (Kilograms)

Force = Mass * Acceleration

On the surface of the Earth, the acceleration would be gravity, 9.81m/s²

If calculating mass...

F=mg

926N=m(9.81m/s²)

m=94.393476kg

1) The force of the object is 2.25 * 10^-11 N

b) The force of the object is 5.63 * 10^-12 N

2) The mass of the object is 72 Kg

c) The acceleration due to gravity is 9.7 m/s^2

We know that the gravitational force does speak of the force that is acting between two masses. It should be known that the gravitational force would depend both on the magnitude of the forces and on the distance apart.

Given that;

F = G m1m2/r^2

F = force on the objects

m1 and m2 = masses of the objects

G = Gravitational constant

r = distance of separation

1) F = 6.6 * 10^-11 * 35 * 35/60^2

F = 8.1 * 10^-8/3600

F = 2.25 * 10^-11 N

b) The force would then be; 1/4 * 2.25 * 10^-11 N =5.63 * 10^-12 N

2) 7 * 10^-9 =  6.6 * 10^-11 * m^2/7^2

m^2 = 49 * 7 * 10^-9 /6.6 * 10^-11

m =√49 * 7 * 10^-9 /6.6 * 10^-11

m = √3.43 * 10^-7/6.6 * 10^-11

m = 72 Kg

3) g = Gme/r^2

g = 6.6 * 10^-11 * 6.0 * 10^24/(6.38 * 10^6)^2

g = 39.6 * 10^ 13/4.1 * 10^13

g = 9.7 m/s^2

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The sum of the kinetic and potential energies of particles in an object called mechanical energy.

Mechanical energy is the energy possessed by an object due to its motion or due to its position. This energy is derived from the work done on an object.

It can be in the form of kinetic energy, the energy of motion; or in the form of potential energy, the energy an object has due to its position or shape.

Mechanical energy can be converted between the two forms, and is often converted into other forms, such as electrical energy or thermal energy.

Mechanical energy is used to power machines and devices, and is an important source of energy in the modern world.

Therefore, The sum of the kinetic and potential energies of particles in an object called mechanical energy.

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A ball released from rest from the twentieth floor of a building, after 3 s falls 9 floors, considering they are evenly spaced.

A ball is released from rest from the twentieth floor of a building. It experiences a uniformly accelerated rectilinear motion. We can find the displacement after 1 s using the following kinematic equation.

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Answer:

the distance moved is 3 m

Explanation:

as power = work done/time

and work done is force into parallel distance therefore;

P = F x d/ t

now:

P = 5 W

F = 5 N

t = 3 s

d = X m

hence;

5 = (5 x X)/3

15 = 5X

3 m = X

the distance moved is 3 m

(a) The linear speed of the yo-yo just before it reaches the end of its 1.0m-long string can be calculated using conservation of energy. The initial potential energy of the yo-yo is equal to its kinetic energy just before the end of the string:PE = KE ,mgh = 1/2 mv^2,where m is the mass of the yo-yo, g is the acceleration due to gravity, h is the height of the yo-yo above the ground, and v is the linear speed of the yo-yo.Substituting in the given values, we have:(0.050 + 0.0050) * 9.8 * 1.0 = 0.5 * (0.050 + 0.0050) * v^2,Solving for v, we find that the linear speed of the yo-yo just before it reaches the end of its 1.0-m-long string is:v = 2.44 m/s(b) The fraction of kinetic energy that is rotational can be calculated using the following equation:KE_rotational / KE_total = I_

What is the kinetic ?

The energy that an object in motion possesses is known as kinetic energy. It is the energy of movement, which is released when the object stops moving. This energy comes from the object's mass and velocity. Kinetic energy can be found in an object's rotation, vibration, or translation. Kinetic energy is a form of potential energy that can be converted into other forms of energy, such as thermal, electrical, or chemical energy. Kinetic energy is useful in many everyday situations, such as the motion of a car or the motion of a roller coaster. It can also be used to generate electricity, power mechanical devices, and even propel rockets into space.

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