4. The earth exerts a gravitational force of 3.5 N on an object. What is the mass of
the object in kilograms? *

A parallel-plate capacitor is connected to a potential source where it gains charge. if a dielectric material is placed between the plates, then the quantity that remains unchanged.

In an electric field, a capacitor is a device that stores electrical energy. It has two terminals and is a passive electrical component.

Capacitance refers to a capacitor's effect. While there is some capacitance between any two nearby electrical wires in a circuit, a capacitor is a component made to increase capacitance. The term "condenser" or "condensator" originally applied to the capacitor. Condenser microphones, sometimes known as capacitor microphones, are a remarkable exception to the general lack of usage of this name and its cognates in English.

Practical capacitors come in a wide variety of physical shapes and constructions, and there are numerous varieties that are used often.

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Answer:

Explanation:

We are given the following the following

Initial speed u = 0.5m/s

initial distance S1 = 15cm = 0.15m

Final distance = 0m

Required

Final speed v

Using the equation of motion;

v² = u²+2gS

v² = 0.5²+2(9.8)(0.15)

v² = 0.25+2.94

v² = 3.19

v = √3.19

v = 1.786m/s

Hence  its speed when it reaches the bottom is 1.786m/s

2000 mm is equivalent to 2 m. This can be derived from the fact that 1 m = 1000 mm. Thus, 2000 mm would be equal to 2 m since it is twice the length of 1000 mm. This conversion is important in various fields such as construction, engineering, and science where precision is necessary.

It is crucial to be able to convert between different units of measurement in order to make accurate calculations and measurements.The millimeter is a unit of length that is often used to measure small distances such as the thickness of a sheet of paper or the size of a small component. It is part of the metric system, which is a system of units used across the world that is based on multiples of 10.

This system makes it easy to convert between different units since it is based on a consistent set of rules.For example, to convert 2000 mm to meters, we can simply divide by 1000 since there are 1000 millimeters in a meter. This gives us 2 meters, which is the equivalent length in meters of 2000 millimeters.

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Answer:

π/2 radians.

Explanation:

Angular Displacement

It's the angle expressed in radians, degrees, revolutions, etc. through which a point revolves around a point called the center.

To find the angular displacement, we must recall a full revolution, or turn around the center measures 360 degrees, or 2π radians.

The Earth completes a turn every 24 hours. This means that in 6 hours, it has given 6/24 = 1/4 of a turn.

This means that, measured in radians, the angular displacement of a person during 6 hours is:

1/4*2π radians

Simplifying:

π/2 radians.

Answer:

The distance traveled by the apply after being released is 127.45 m.

Explanation:

The given parameters;

time of motion of the apple, t = 5.1 s

initial velocity of the apple, u = 0

The distance traveled by the apply is calculated by applying second kinematic equation as shown below.

Assuming downward motion to be positive.

ok oh if i need any answers just asking i'll help you

The number of revolutions the spinning disc makes during the given time is 34 revolutions .

To find the number of revolutions the spinning disc makes during the given time, we need to first find the average angular velocity and then multiply it by the time.
Step 1: Calculate the initial angular velocity (ω₁).
Given that the spinning disc rotates at 130 revolutions per minute (rev/min), we first convert it to revolutions per second (rev/s) by dividing by 60:
ω₁ = 130 rev/min / 60 = 2.167 rev/s
Step 2: Calculate the final angular velocity (ω₂).
Since the disc stops, its final angular velocity is 0 rev/s.
Step 3: Calculate the average angular velocity (ω_avg).
The average angular velocity is the mean of the initial and final angular velocities:
ω_avg = (ω₁ + ω₂) / 2 = (2.167 + 0) / 2 = 1.0835 rev/s
Step 4: Multiply the average angular velocity by time to find the number of revolutions.
The given time is 31 seconds:
Number of revolutions = ω_avg × time = 1.0835 rev/s × 31 s ≈ 33.6 revolutions
The closest answer among the given choices is A) 34.

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The intensity starts at Io/2 , decreases to zero, increases to Io/2, decreases to zero and increases to Io/2 is correct answer.

What is intensity?

In physics, the power transferred per unit area is known as the intensity or flux of radiant energy, where the area is measured on a plane perpendicular to the direction of the energy's propagation. Watts per square metre (W/m2) and kilogrammes per square metre (kg/s3) are the units used in the SI system. With waves like acoustic waves (sound) or electromagnetic waves like light or radio waves, intensity is most usually employed to describe the average power transfer across one period of the wave. Other situations where energy is exchanged can also be described in terms of intensity. One could, for instance, figure out how much kinetic energy each drop of water from a sprinkler is carrying.

The intensity is Io/2 after going through the first polarizer.

At some point, let the angle between the polarizers be.

The intensity is then given as after going through the second polarizer.

I = cos2(Io/2).

Cos2 is 1 at 0°, 180°, and 360° and zero at 90° and 270° because ranges from 0 to 360°. Consequently, the transmitted light's intensity I,

The intensity starts at Io/2 , decreases to zero, increases to Io/2, decreases to zero and increases to Io/2 is correct answer.

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Answer:

The coefficient of friction between m₂ and the table is approximately 0.2703

The magnitude of the tension in cable is 28.737 N

Explanation:

The given parameters are;

The mass of the block on the table, m₂ = 5.8 kg

The mass of the hanging block, m₁ = 4.5 kg

The distance in which the block has moved = 0.317 m

The speed after the block moves = 1.33 m/s

The acceleration due to gravity, g = 9.8 m/s²

The coefficient of friction between m₂ and the table = μ

The acceleration, a, of the blocks is given from the formula of speed, v, of a body at a given distance, s, from rest as follows;

v² = 2 × a × s

Where;

v = 1.33 m/s

s = 0.317 m

Substituting the values gives;

1.33² = 2 × a × 0.317

a = 1.33²/(2 × 0.317) ≈ 2.79

The acceleration, a ≈ 2.79 m/s²

Therefore, we have the force acting on the system given as follows;

Weight of m₁ - Frictional force of m₂ = (m₁ + m₂) × a

4.5 × 9.8 - 5.8 × 9.8 × μ = (4.5 + 5.8) × 2.79

4.5 × 9.8 - 5.8 × 9.8 × μ = 28.737 N

(4.5 × 9.8)N -  28.737 N = 5.8 × 9.8 × μ

44.1 N -  28.737 N =56.84 N × μ

15.363 N = 56.84 N × μ

μ =  15.363 N/(56.84 N) ≈ 0.2703

The coefficient of friction between m₂ and the table = μ ≈ 0.2703

The coefficient of friction between m₂ and the table ≈ 0.2703

The magnitude of the tension in cable = (m₁ + m₂) × a = 28.737 N.

The magnitude of the tension in cable = 28.737 N

Water flows through a pipe with a cross-sectional area of 0.002 m^2 at a mass flow rate of 4 kg/s. The density of water is 1 000 kg/m^3 . The average velocity will be 2m/s

The flow rate of a liquid is how much fluid passes through an area in a particular time. Flow rate can be articulated in either in terms of velocity and cross-sectional area, or time and volume.

Flow rate = Volume of fluid / time

               = (Area * distance) / time

               =  Area * average velocity      (distance / time = average velocity)

Given

Cross-sectional area  = 0.002 \(m^{2}\)

Flow rate =  4 kg/s

Average velocity = Flow rate / (Area * density)

                            = 4 / (0.002 * 1000)

                           = 2m/s

hence , the  average velocity will be 2 m/s

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Answer:

the work done can be positive or negative  

Explanation:

The net torque on each wheel of the bicycle is -0.27 Nm.It is important to note that the negative sign indicates that the torque is in the opposite direction to the motion of the wheel.

To find the net torque on each wheel of a bicycle slowing down with an angular acceleration of -15 rad/s², we can use the formula for torque:

τ = Iα

Where τ is the net torque, I is the moment of inertia, and α is the angular acceleration.

We are given the mass and radius of each wheel as 0.4 kg and 0.3 m, respectively, and the angular acceleration as -15 rad/s². The moment of inertia of a solid cylinder is:

I = 1/2 mr²

Substituting the given values, we get:

I = 1/2 × 0.4 kg × (0.3 m)² = 0.018 kg m²

We can now calculate the net torque using the formula:

τ = Iα

Substituting the given values, we get:

τ = 0.018 kg m² × (-15 rad/s²) = -0.27 Nm.

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It is possible to suspend an object at rest from its center of gravity, and gravity won't induce it to begin rotating no matter how it is positioned.  

Thus, The center of gravity of an object will be located somewhere along a vertical line that passes through the point of suspension if you suspend it from any point and allow it to come to rest.

The gravitational acceleration is (almost) constant near the surface of the earth, where the center of mass also lies.

A place that represents the average or typical location of an object's mass, as if all of the mass were contained there, is known as the center of mass (CM). The geometric center of a uniform sphere serves as its center of mass. The barycenter is another name for the CM.

Thus, It is possible to suspend an object at rest from its center of gravity, and gravity won't induce it to begin rotating no matter how it is positioned.  

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Answer:

Explanation:

Conduction:  touch a hot toaster oven (and get burned!)

Radiation:  hold hands near a hot toaster oven to warm them up

Convection:  see air above a hot toaster oven appear wavy as it rises

Answer:

car and a can

Explanation:

If a boat weighs 800 kg with its passengers on board and drifts in at 1.4 m/s. Sam's work to stop it is -1152J.

Kinetic energy of K.E= 1/2 mv²

Work energy W= 1/2mv₁²-1/2mv₂²

                          =1/2m(v₁²-v₂²)

                           =1/2*900(0-1.6)

                           =-1152J

The difference between the boat's initial and final kinetic energies is equal to the change in the boat's kinetic energy.Due to the boat coming to a complete stop after Sam stopped it, the final speed of the boat is equal to zero.The change in the boat's kinetic energy is equal to the work Sam did to stop it, according to the work energy theorem. As a result, Sam's work can be computed by determining the change in the boat's kinetic energy. Sam's work on the boat is represented by the negative number in the final work done answer.

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Answer:

Hi... Your answer is impulse

Answer:

A

Explanation:

It’s a because a electrolyte reproduces

Answer:

The acceleration is  \(a =51945 \ km/h^2\)

Explanation:

From the question we are told that

   The lift up speed is  \(v = 147 \ km/h\)

    The distance covered for the take off run is \(s = 208 m = 0.208 \ km\)

Generally from kinematic equation we have that

      \(v^2 = u^2 + 2as\)

Here u is the initial  speed of the aircraft with value 0 m/ s give that the aircraft started from rest

So  

    \(147^2 = 0^2 + 2* a* 0.208\)

=>  \(a =51945 \ km/h^2\)

The form(s) of energy does the original GPE was transformed is kinetic energy.

If an object is lifted, work is done against gravitational force. The object gains energy.

The equation for calculating gravitational potential energy is

GPE =mgh

where, GPE is the gravitational potential energy, m is the mass, h is the change in height and g is the acceleration due to gravity.

The potential energy is just opposite of the kinetic energy. When potential energy is lower, the kinetic energy is higher.

Thus, the original GPE was transformed into kinetic energy.

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Answer:

Subduction, Trench, Mantle

Explanation:

Answer: subduction, trench, and mantle

Explanation:

Answer:

B is the answer

Explanation:

Answer:

potential energy=mgh

=50×10×20

=10000 J

Answer:

South Carolina and Georgia, the main cash crops were indigo and rice. Explanation:

trust me

Answer:

D

Explanation:

because it is.

Person 1 is standing at block 3, as they heard the siren at block 3. Person 2 is standing at block 2, as they heard the siren at block 2. Person 3 is standing at block 1, as they heard the siren at block 1.

Person 1: Heard siren at block 3

Person 2: Heard siren at block 2

Person 3: Heard siren at block 1

Person 4: Heard siren at block 0

Person 1 is standing at block 2, Person 2 is standing at block 3, Person 3 is standing at block 4, and Person 4 is standing at block 5. This is because the siren started at block 3, and the sound would have gotten progressively louder as it moved away from each observer. If the person 4 is standing at block 0, as they heard the siren at block 0. This implies that the siren is moving away from the observers, as each person heard it at the block right before the one they are standing at.

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Answer:

I think its A

Explanation:

Not 100 percent sure tho but they do go up and down in big movements.

A 70.0 cm long string is vibrating in such a manner that it forms a standing wave with three antinodes. Third harmonic

The maximum wave amplitude is produced at the , which is the site of constructive interference of the incoming and reflected waves. The point at which destructive interference reduces the wave's amplitude to zero is known as a node. It should be simple to see that the antinodes have the highest vertical velocity, whilst the nodes have a strictly horizontal velocity. An antinode forms on a vertical border because the horizontal velocity component disappears there, whereas nodes are typically seen outside of solid bounds. The size and depth of a bay or estuary have a significant impact on the standing wave's characteristics. The center and two ends of a totally closed basin are referred to as nodes and antinodes, respectively.

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Answer:

40 m/s

Explanation:

I just puot in in khanacademy and it was right

Answer:

40 m/s^2

Explanation:

Khan Academy