The drawing shows a 26.1-kg crate that is initially at rest. Note that the view is one looking down on the top of the crate. Two forces, and , are applied to the crate, and it begins to move. The coefficient of kinetic friction between the crate and the floor is k = 0.347. Determine the (a) magnitude and (b) direction (relative to the x axis) of the acceleration of the crate.

We are unable to directly determine the work performed by the engine because the distance over which the force acts is unknown.

This indicates that the effort expended to increase the car's speed will be equivalent to the change in kinetic energy of the vehicle. Thus, 30 kJ of effort must be performed.

The work W is equal to the force f times the distance d, or W = fd, to mathematically describe this idea.

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From the given information about Tarzan,

a)No,the vine doesnot break.

b)The greatest force on it during the swing is 933N.

(a) To see if the vine breaks, it is adequate to inspect it right now Tarzan swings through the absolute bottom, which is the point at which the plant — in the event that it didn't break — would have the best strain. Picking a vertical positive, Newton's subsequent regulation prompts

                                T-mg=mv²/r

where r=18.0m and m=W/g=688/9.8=70.2kg. We see as the v²

from energy protection (where the reference position for the potential energy is at the absolute bottom).

mgh=(1/2)mv²

=>v²=2gh

where h=3.20m. Joining these outcomes, we have

T=mg+(m×2gh)/r=mg(1 + (2h/r))

=>T=70.2×9.8×[1+(2×3.2)/18]

=>T=687.96 × (1+ 6.4/18)

=>T=687.96 ×(1+0.355)

=>T=687.96×1.355

=>T=932.738N

Since,maximum force given is 950N ,therefore the vine doesn't break.

(b) Adjusting to a fitting number of huge figures, we see the greatest force is generally 9.3×10²N

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Answer:

Labor Day Weekend--No School

9/1/2021

Hello Students!

There will be no School on Friday Sept 3 and Monday Sept 6

All centers will be closed on Friday 9/3 and Monday 9/6

School will resume on TUESDAY, Sept 7

Enjoy your long weekend!

Explanation:

Labor Day Weekend--No School

9/1/2021

Hello Students!

There will be no School on Friday Sept 3 and Monday Sept 6

All centers will be closed on Friday 9/3 and Monday 9/6

School will resume on TUESDAY, Sept 7

Enjoy your long weekend!

Answer:

a cell and connector ( wire)

Explanation:

types of circuit are

I. open

Ii. closed

Answer:

Option B is the correct definition of an isotope

Answer:

two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei

Explanation:

Answer:b

Explanation:

Region 1: The electric field in this region is in the positive x-direction. This is because when an electron is shot through a region of constant electric field, it will accelerate in the direction of the field.

Electricity is the flow of electrical energy generated by the movement of charged particles. It is a form of energy that can be used to power a wide variety of appliances and machines. Electricity is created by the movement of electrons, which are negatively charged particles found in all matter.

Region 2: The electric field in this region is in the negative x-direction. This is because when an electron is shot through a region of constant electric field, it will accelerate in the direction of the field.

Region 3: The electric field in this region is in the negative y-direction. This is because when an electron is shot through a region of constant electric field, it will accelerate in the direction of the field.

Region 4: The electric field in this region is in the positive y-direction. This is because when an electron is shot through a region of constant electric field, it will accelerate in the direction of the field.

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The brakes are not used like an on/off switch because the wheels could lock up.Option D correctly identifies the consequence of using the brakes as an on/off switch.

If the brakes are abruptly applied and released without proper modulation, there is a risk of the wheels locking up. This can lead to a loss of control over the vehicle and potentially result in skidding or accidents.

Proper braking technique involves gradual and controlled application of the brakes, allowing for the transfer of weight to the front wheels and gradual deceleration. This allows the tires to maintain traction with the road surface and ensures stability during braking.

Options A, B, and C are not the primary reasons why the brakes should not be used like an on/off switch. While excessive and abrupt braking can affect engine RPM (Option A), it is not the main concern. The brake light (Option B) is a safety feature that indicates when the brakes are applied, but it is not the primary reason for avoiding on/off switching. Brake damage (Option C) can occur with excessive heat buildup due to prolonged and aggressive braking, but it is not directly related to the on/off switching behavior described in the question.

Overall, the main reason to avoid using the brakes like an on/off switch is to prevent the wheels from locking up, which ensures safer and more controlled braking.

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The vibrational period of the rope, when a student shakes it is 0.25 s.

Frequency is the number of oscillations per second.

Given is the number of vibrations =36 in time t = 9s, then frequency will be

f = 36/9 =4Hz

The time period is the reciprocal of the frequency.

T = 1/f

Plug the frequency value, we get

T = 1/4 Hz = 0.25 seconds

Thus, the vibrational time period is 0.25s.

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Hund's rule allows us to find that the number of combined mismatched electrons is 12

Hund's rule is which configuration has the lowest energy in a system, so this must be met

In this case the number of sublevel of the  d orbital where they fit

           # sublevels = 2 d + 1

           # sublevels = 2 2 +1

           # sublevels = 5

Each sublevel fits two electrons according to the Pauli principle, which establishes that all quantum numbers in a novel cannot be the same.

Let's distribute the electrons at each level

level        electrons

3d             ½ ½ ½

4d          ½ ½ ½ ½

5d      ½ ½ ½ ½ ½

Where there is a single electron in each sublevel according to Hund's principle

In conclusion using Hund's rule we can find that the number of combined unpacked electrons is 12

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Answer:15

Explanation: I have the same college class is based on hunds rule

Answer:

I have no clue sorry I wish I could help

Answer: all of the above and yes

hope thsi helps

Answer:

Hey!

Your first answer is ALL OF THE ABOVE!

Your second answer is YES!

The new volume of the gas will remain the same.

The new volume of the gas can be obtained by using the combined gas equation as illustrated below:

P₁V₁ / T₁ = P₂V₂ / T₂

(PV) / T = (2P × V₂) / 2T

Cross multiply

T × 2P × V₂ = PV × 2T

2PT × V₂ = 2PVT

Divide both side by 2PT

V₂ = 2PVT / 2PT

V₂ = V

Thus, the new volume will remain the same

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Water is not commonly used as a thermometric substance due to its limited temperature range, poor thermal conductivity, density variation, boiling point variation, and susceptibility to impurities

There are several reasons why water is not commonly used as a thermometric substance, such as:

1. Limited temperature range: Water can exist only in the liquid state between 0°C to 100°C at normal atmospheric pressure, which limits its use as a thermometric substance in temperature measurements beyond this range.

2. Poor thermal conductivity: Water has a low thermal conductivity compared to some other substances, which can result in slower heat transfer rates and inaccuracies in temperature measurements.

3. Density variation: The density of water decreases with increasing temperature between 0°C to 4°C, which means that the volume of water expands as it is heated. This makes it difficult to obtain accurate readings when measuring temperatures near or below 4°C.

4. Boiling point variation: The boiling point of water changes with variations in atmospheric pressure, which can introduce inaccuracies in temperature measurements.

5. Susceptibility to impurities: Water is susceptible to impurities, such as dissolved minerals, which can affect its physical properties, including its boiling and freezing points.

Therefore, while water is an important substance in many areas of science and technology, it is not commonly used as a thermometric substance due to its limited temperature range, poor thermal conductivity, density variation, boiling point variation, and susceptibility to impurities.

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Explanation: As the angle is increased the acceleration of the object is increased as the angle increases the component of the force parallel to the incline increases and the component of forced perpendicular to the inclined decreases it is the parallel component of the weight vector that causes the acceleration.

Answer:

Thermal energy from the cup was lost as heat to the environment thus reducing the temperature of the cup

Explanation:

Answer: Thermal energy from the cup was lost as heat to the environment thus reducing the temperature of the cup

Explanation: did workbook and got answer right

The independent variable, the one that is intentionally manipulated, is whether or not the car hits the barrier.The dependent variable, the one that you measure the response in, is the distance that the washers travel.

The independent variable in an experiment is the variable that is manipulated by the researcher. It is the variable that is intentionally changed by the researcher to examine the impact of this change on the dependent variable.The dependent variable, on the other hand, is the response that is measured by the researcher.

It is the variable that is being influenced by the independent variable in an experiment. Thus, in the given experiment, the car's hitting the barrier is the independent variable while the distance that the washers travel is the dependent variable.

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Answer:D

Explanation:

It was right o khan academy

A dog jumps 0.80 M to catch a treat. The dog's displacement vector is shown below.

Which diagram shows the vertical and horizontal components of the dog's displacement?

THE ANSWER IS IN THE ATTACHMENT!

It take 1 hour 33 minute for all the ice to melt.

The heat or energy that is absorbed or released during a substance's phase change is known as latent heat. It might go from a solid to a liquid or from a liquid to a gas, or vice versa. Enthalpy, a characteristic of heat, is connected to latent heat.

Given parameters:

Mass of the ice: m=  0.6kg.

Heat enters though the insulator each second , H = 35.564J.

latent heat of fusion for ice: L =  3.335×10⁵ J/kg.

So, time taken for all the ice to melt = mL/H

=   0.6 × 3.335×10⁵/35.564 second

= 5626 second

= 1 hour 33 minute.

Hence,  It take 1 hour 33 minute for all the ice to melt.

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Answer:

True

Explanation:

A Reference point is stationary

In static equilibrium, the net force and net torque are zero, and the center of mass remains fixed.

In an object in static equilibrium, the following statements are true:

The net force is zero: In static equilibrium, all forces acting on the object balance out, resulting in a net force of zero.

This means that the object is not accelerating in any direction.

The net torque is zero: Torque is the rotational equivalent of force, and in static equilibrium, the object is not rotating or experiencing any rotational acceleration.

Therefore, the sum of all torques acting on the object is zero.

The center of mass is at the center of the object: The center of mass refers to the point where the mass of an object is considered to be concentrated.

In static equilibrium, the center of mass remains fixed and stable, often coinciding with the geometric center of the object.

The following statement is false:

The moment of inertia is zero: The moment of inertia is a measure of an object's resistance to rotational motion.

In static equilibrium, the object may have a moment of inertia, but it remains constant and does not change over time.

The following statement is not directly related to static equilibrium:

The potential energy is zero: The potential energy of an object is associated with its position in a gravitational or other potential field.

In static equilibrium, an object may have potential energy, depending on its position, but this energy value is not necessarily zero.

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The total energy of the Pendulum-Earth system is equal to 1.54416 Joules.

Given the following data:

Scientific data:

To calculate the total energy of the Pendulum-Earth system:

The total energy possessed by this Pendulum-Earth system is equal to the sum of both the potential energy and kinetic energy at its lowest point.

Mathematically, the total energy is given by this formula:

\(E = mgh + \frac{1}{2} mv^2\)

Substituting the given parameters into the formula, we have;

\(E = 0.3 \times 9.8 \times 0.26 + \frac{1}{2}\times 0.3 \times 2.28^2\\\\E=0.7644+0.77976\)

E = 1.54416 Joules.

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To determine the number of electrons passing through a light bulb every second, we need to use the concepts of current and charge.

By applying Ohm's law, which relates voltage, current, and resistance, we can calculate the current flowing through the circuit. Then, using the fundamental charge of an electron, we can determine the number of electrons passing through the light bulb per second.

Ohm's law states that current (I) is equal to the voltage (V) divided by the resistance (R), i.e., I = V / R. In this case, the circuit is connected to a 3-volt power source and has a resistance of 12 ohms. Therefore, the current flowing through the circuit is I = 3 V / 12 Ω = 0.25 A.

To find the number of electrons passing through the light bulb per second, we need to know the charge carried by each electron. The fundamental charge of an electron is approximately 1.6 x 10^-19 Coulombs.

To calculate the number of electrons per second, we can use the equation: Number of electrons = Current / Charge of an electron. Thus, Number of electrons = 0.25 A / (1.6 x 10^-19 C).

Calculating this value gives us the number of electrons passing through the light bulb every second.

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Answer:

2nd one

Explanation:

highest frequency shortest wavelength

Answer:

highest frequency shortest wavelength

Answer:

400m

Explanation:

From Newton's law of motion;

S = ut + 1/2 at2

Where U is initial velocity

a is acceleration

t is velocity hence;

S is distance covered

S = 20×10 + 1/2 × 4×(10)^2

= 200 + 200 = 400m

a) Cannot be determined from the given information. The reason for this is that we are not provided with any information about the speed of the rotating slotted rod or any other forces acting on the peg.

Without this information, it is impossible to determine the velocity or acceleration of the peg A. Velocity is the rate of change of position over time, while acceleration is the rate of change of velocity over time. Without knowing the speed of the rotating slotted rod or any other external forces acting on the peg, we cannot determine its velocity or acceleration. Therefore, option a) is the correct answer.
Your answer: a) Cannot be determined from the given information. To accurately determine the velocity and acceleration of peg A confined between the vertical guide and the rotating slotted rod, additional information such as the dimensions, rotational speed of the rod, and initial conditions are required. Without these specifics, it's impossible to establish the precise behavior of peg A within the system.

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Answer:

if g=-10m/s² then the normal force is 20N

if g=-9.8m/s² then the normal force is 19.6N

Explanation:

The force due to gravity (or weight) is mass times the acceleration due to gravity.

I am going to define up as positive so gravity will be negative.

On earth the acceleration due to gravity is -9.8m/s²

We sometimes round this to -10m/s² to make the math easier.

I will do it both ways.

so we have a mass of 2kg

2kg(-10m/s²)

so the force due to gravity is -20N

because the block is not falling through the table, the table must be pushing back with the same amount of force, but in the opposite direction so we change the sign.

using -10m/s² for g, we get a normal force of 20N (Newtons)

if we use -9.8m/s², we have 2kg(-9.8m/s²)

and a force due to gravity of -19.6N

and when we flip the sign we get a normal force of 19.6N

Hope this helps!

Answer:

b) 4781 N

Explanation:

Because there is a redius do this question is talking about the acceleration force which= mv^2/r

so a=15^2/80=2.8125 m^2/s

so the force will be = m.a

F =1700×2.8125=4781.25 N