in figure p8.4, a 70 kg man walks out on a 10 kg beam that rests on, but is not attached to, two supports. when the beam just starts to tip, what is the force exerted on the beam by the right support?

Answer:

D. 16 Kgm/s

Explanation:

Let the momentum of the two balls be A and B respectively.

Momentum A = 16 kgm/s

Momentum B = 0 kgm/s (since the ball is at rest).

Total momentum = A + B

Total momentum = 16 + 0

Total momentum = 16 Kgm/s

Momentum can be defined as the multiplication (product) of the mass possessed by an object and its velocity. Momentum is considered to be a vector quantity because it has both magnitude and direction.

Mathematically, momentum is given by the formula;

Momentum = mass * velocity

The cornea is  responsible of refraction light 1/3 in eye.

In addition to the protective function, it plays a fundamental role in the formation of vision. Transparent, it works like a lens over the iris, focusing light from the pupil towards the retina.

Normally, the cornea and lens deflect (refract) incoming light rays, focusing them on the retina. The shape of the cornea is fixed, but the lens changes shape to focus on objects at different distances from the eye.

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As the feather fell, air resistance exerted 0.00002 J of work on it.

Work is the energy transferred to or from an object when a force is applied over a distance. In other words, work is done when a force moves an object.

To calculate the work done by air resistance on the feather, we need to know the change in kinetic energy of the feather due to air resistance. The initial kinetic energy of the feather at the top is zero, and the final kinetic energy of the feather just before it hits the ground is given by:

Kf = (1/2) * m * v^2

where m is the mass of the feather, v is the final velocity of the feather just before it hits the ground.

Kf = (1/2) * 0.002 kg * (0.20 m/s)^2 = 0.00002 J

The work done by air resistance is equal to the change in kinetic energy of the feather:

W = Kf - Ki

where Ki is the initial kinetic energy of the feather at the top, which is zero.

W = Kf - Ki = 0.00002 J - 0 J = 0.00002 J

Therefore, the work done by air resistance on the feather as it fell is 0.00002 J.

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Generator functions can be used on their own to create iterable objects. They are defined using the "yield" keyword instead of "return" and generate a sequence of values as they are iterated over.

On the other hand, generator functions can also be used within the __iter__ method of a class to create iterable objects. In this case, the generator function is defined within the class and called when the object is iterated over. This allows for greater control over the iteration process and the ability to add additional functionality to the iterable object. By defining the generator function within the class, it can also access the object's attributes and methods, allowing for greater flexibility in the iteration process. Overall, using generator functions within a class allows for more customizable and efficient iteration over large datasets.

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Answer:

Ok I’m not pretty sure but I think it’s C but look for more answers first before you put C  because I don’t want you to get it wrong. :)

Explanation:

Answer:

i think the answer is The nonmetal takes up more space.

Explanation:

i hope this helps

The type of cutting blade that can be damaged by petroleum vapors is a carbide tip blade. Optio A

Carbide tip blades are made of a combination of carbide and steel, which makes them durable and suitable for cutting through various materials, including metal, plastic, and wood.

However, carbide is vulnerable to corrosion and damage from certain chemicals, such as petroleum vapors, which can weaken the blade's structure and reduce its cutting performance.

Therefore, it is important to avoid exposing carbide tip blades to petroleum vapors and other corrosive substances to ensure their longevity and effectiveness.

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Answer:

Distance travelled is 7 meters and the displacement is 3 meters

Answer:

Um okay? thank you for the points have a good say and be careful out there!

Explanation:

Answer:

hello

Explanation:

When a dielectric material is introduced between the plates of a parallel plate capacitor while it is connected to a battery and fully charged, the following statement is true:

(D) The electric field between the plates will decrease.

The presence of a dielectric material between the plates of a capacitor increases its capacitance. Capacitance is a measure of the ability of a capacitor to store charge. When the capacitance increases, for a given amount of charge on the capacitor, the voltage across the plates decreases. Since the electric field between the plates is directly proportional to the voltage divided by the distance between the plates, a decrease in voltage leads to a decrease in the electric field.

Therefore, adding a dielectric material between the plates of the capacitor decreases the electric field between the plates.

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Answer: It's lack of mass production

It is biodegradable. It does not harm landfills. It doesn't cost much to recycle.

I cannot find anything about mass production or if it costs a lot to recycle.

From the information I know, operating costs were expensive. Cellulose is always recycled and is good for the environment meaning it can't cost much to recycle

Since operating costs were high, it most likely won't be mass produced because it's too expensive.

Therefore I think the answer is its lack of mass production.

Answer:

its lack of mass production

Explanation:

The weight of the person(s) using the ladder, as well as the weight of any tools or materials being carried up the ladder.

When using a ladder, it is important to calculate the total weight it needs to support to ensure safety and stability. In addition to the weight of the person(s) using the ladder, the weight of any tools or materials being carried up the ladder must also be taken into account.

Neglecting to consider these factors can lead to a ladder being overloaded, which can cause it to become unstable and increase the risk of falls or other accidents.

It is also important to choose the right type of ladder for the job, as different ladders have different weight capacities and maximum load ratings. When in doubt, it is always better to err on the side of caution and choose a ladder with a higher weight capacity than you think you will need.

By taking the time to properly calculate the total weight a ladder needs to support, you can ensure that you are using it safely and reduce the risk of accidents or injuries.

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Answer:

Below

Explanation:

Here is how to find the Fnet of the plate :

     Fnet = F1 + F2

     Fnet = 100 N [ R ] + 75 N [ L ]

Now because the forces push in opposite directions, you need to subtract :

     Fnet = 100 N [ R ] - 75 N [ R ]

     Fnet = 25 N

Hope that helps!

Answer:

The answer is 25!

Answer:

2 m/s^2, west

Explanation:

Vf=final velcoity

Vi=initial velocity

t=timw

\(a = \frac{vf - vi}{t} \)

=

\( \frac{15 - 25}{5} \)

= - 2 m/s^2

The - changes direction and makes it opposite

2 m/s, west

The magnitude of the object acceleration is -2m/s². Since the acceleration of the object is negative, hence the direction will be towards the west

Acceleration is the change in velocity of a body with respect to time. Mathematically;

\(a=\frac{v-u}{t}\)

v is the final velocity

u is the initial velocity

t is the time taken;

Given the following parameters

v = 15m/s

u = 25m/s

t = 5.0secs

Substitute the given parameters into the formula to have:

\(a=\frac{15-25}{5}\\a=\frac{-10}{5}\\a=-2m/s^2\)

Hence the magnitude of the object acceleration is -2m/s². Since the acceleration of the object is negative, hence the direction will be towards the west.

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Answer:

has any one finished the lab yet?????

Explanation:

Answer: A) The speed of the zero-momentum reference frame is zero.

B)speed of zero-momentum reference frame = v

Explanation: A. In the Earth reference frame, the two identical cars approach each other with equal and opposite momenta. Therefore, the total momentum of the system is zero. The speed of the zero-momentum reference frame can be found by dividing the total momentum by the total mass of the system, which is equal to twice the mass of each car. Since the cars are identical, we can express this as:

speed of zero-momentum reference frame = total momentum / (2 x mass of each car)

The momentum of each car can be calculated as:

momentum = mass x velocity

Since both cars are traveling at the same speed v but in opposite directions, the momenta are equal and opposite, and they cancel each other out. Therefore, the total momentum of the system is zero.

So we have:

speed of zero-momentum reference frame = 0 / (2 x mass of each car) = 0

Therefore, the speed of the zero-momentum reference frame is zero.

B. In the Earth reference frame, the two identical cars traveling in the same direction have the same momentum. Therefore, the total momentum of the system is twice the momentum of each car. The speed of the zero-momentum reference frame can be found by dividing the total momentum by the total mass of the system, which is equal to twice the mass of each car. Since the cars are identical, we can express this as:

speed of zero-momentum reference frame = total momentum / (2 x mass of each car)

The momentum of each car can be calculated as:

momentum = mass x velocity

Since both cars are traveling at the same speed v, the momenta are equal and add up. Therefore, the total momentum of the system is:

total momentum = 2 x (mass of each car) x (velocity of each car)

Substituting the values we were given, we get:

total momentum = 2 x (mass of each car) x v

So we have:

speed of zero-momentum reference frame = [2 x (mass of each car) x v] / (2 x mass of each car)

The mass of each car cancels out, and we are left with:

speed of zero-momentum reference frame = v

Therefore, the speed of the zero-momentum reference frame is equal to the speed of the cars, which is v.

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Answer:

125 joules

Explanation:

The velocity of the runner having a mass of 75 kg will be 9.93 m/s.

The energy of the body by virtue of its motion is called its kinetic energy.

Given is velocity of a runner who has a mass of 75 kg and 3,700 Joules of energy.

The kinetic energy of the body is given by the following formula -

KE = 1/2 mv².

Substituting the values -

3700 = 1/2 x 75 x v²

7400 = 75 x v²

v² = 7400/75

v² = 98.66

v = 9.93 m/s

Therefore, the velocity of the runner having a mass of 75 kg will be 9.93 m/s.

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Answer:

B. Atoms are altered in both processes

Explanation:

Answer: B. Atoms are altered in both processes

Explanation:

The total energy dissipated by the resistor during the entire discharge interval is 0.0082 J.

Given, Charge on the capacitor = Q = 0.15 F Voltage across the capacitor = V = 26 V Resistance of the resistor = R = 1.2 kΩ = 1200 ΩTime constant = RC = 1200 × 0.15 × 10^-3= 0.18 sAt t = 0, Q = CV = 0.15 × 26 = 3.9 C The initial charge on the capacitor is completely dissipated through the resistor. Let the potential difference across the capacitor at any instant t be Vc. Now, the potential difference across the resistor at the same instant t is Vr = V - Vc The current through the resistor at any instant t is I = Vr/R = (V - Vc)/RCharge on the capacitor at the same instant t is Q = CVc Using Kirchhoff's loop rule in the circuit, V - Vc = IR + (Q/C) dVc/dtV - Vc = R (V - Vc)/R + (Q/C) dVc/dtV - Vc = V - Vc + (Q/C) dVc/dtdVc/dt = - 1/RC VcQ/C = CVc Integrating both sides with limits (3.9, 0)0 - Q/C = - C [Vc]3.9/C = C [Vc]Vc = 3.9/C Average power = Total energy dissipated/time interval Total energy dissipated = Average power × time interval Time interval = 5RC = 0.9 s Total energy dissipated = Average power × time interval = (VI)/2 × time interval= 26 × (3.9/1200) × 0.45= 0.0082 J

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The total required area of the heat exchanger decreases with increasing tube diameter.

When designing a single tube-pass heat exchanger to heat water by condensing steam in the shell, the total required area of the exchanger is influenced by the tube diameter selected. In this scenario, the water flows through smooth horizontal tubes in a turbulent flow while the steam is condensed dropwise in the shell.

The tube diameter plays a significant role in determining the total required area of the exchanger. As the tube diameter increases, the cross-sectional area for water flow also increases. This results in a higher flow area for the water, reducing its velocity. With reduced velocity, the water spends more time in contact with the tube wall, leading to a greater heat transfer rate.

As the heat transfer rate increases, the overall heat transfer efficiency improves, and consequently, the required area of the exchanger decreases. This is because larger tube diameters provide a larger heat transfer surface area, allowing for more efficient heat exchange between the water and the steam.

The effect of tube diameter on the total required area in a single tube-pass heat exchanger can be explained by considering the fluid dynamics and heat transfer processes involved. The increase in tube diameter allows for a larger cross-sectional area, which leads to a decrease in water velocity. This reduced velocity enhances the contact time between the water and the tube wall, facilitating better heat transfer.

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The harmonic frequencies would be 880 Hz, 1320 Hz, 1760 Hz, and 2200 Hz if the fundamental frequency was 440 Hz.

The sound waves have a wavelength of 2m and travel at a speed of 440 m/s. Hence, the sound wave has a 2 m wavelength.

340 m/s x 340 Hz x 1 m = 340 m/s, the formula for wavelength. A 34,000 hertz wave has a wavelength of 340 m/s, and its frequency is 0.01 m, or 1 cm.

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1.44*10^-3N  is the force on each other. when 33 centimeters separates one charge from another charge. They both have charges of 1.2 x 10-5 coulombs.

Charge on the first sphere, q 1​ =1.2 x 10^-5  C

Charge on the second sphere, q 2 =1.2 x 10^-5  C

Distance between the spheres, r=30cm=0.3m

F= 4πε

​ q 1 q 2/  r2

​Where, ε 0

​ = Permittivity of free space 4πε 0

=9×10^9Nm2

F= (0.33) 2

1.2 x 10^-5 * 1.2 x 10^-5  C = 1.44*10^-3N

Hence, force between the two small charged spheres is 1.44*10^-3N.

The charges are of same nature. Hence, force between them will be repulsive.

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Answer:

Momentum = 2qEx/v

Explanation:

From the work - energy theorem, we know that;

Kinetic energy = work done

Now, formula for both are;

Kinetic energy = ½mv²

Work done = qEx

Where;

m is mass

v is velocity

q is charge

E is Electric field

x is distance covered.

Thus;

½mv² = qEx - - - - (eq 1)

Now, momentum formula is;

p = mv

Let's rewrite the left hand side of equation 1 to reflect p = mv. Thus;

½v(mv) = qEx

½vp = qEx

p = 2qEx/v

Answer:

The correct option is;

Kinetic energy is least as you are moving from he highest point of the swing moving down to the lowest point of the swing

Explanation:

The formula for the kinetic energy, KE, is given by the following formula;

KE = 1/2 × m × v²

Where;

m = The mass of the body in the study

v = The velocity of motion of the body

Therefore, the kinetic energy increases with velocity and therefore, is lowest at the top of the swing when the object is still for a moment

The total mechanical energy of the body is given by the following equation;

Total mechanical energy, \(E_T\) = PE + KE = Constant

Where;

PE = The potential energy of the body = Mass × Acceleration due to gravity × Height

Therefore, the potential energy is highest at the top of the motion and lowest at the lowest point, which gives;

The kinetic energy is lowest at the top of the motion and highest at the lowest point of the motion.

A thin lens of focal length 68 cm forms a real image 4.6 times as high as the object. The object and image are approximately 299.13 cm apart.

To solve this problem, we can utilize the lens formula:

1/f = 1/v - 1/u

where f is the focal length of the lens, v is the image distance, and u is the object distance. Given that the focal length (f) is 68 cm, we can proceed to find the image and object distances.

Let's assume the height of the object is "h." Since the problem states that the real image formed is 4.6 times as high as the object, the height of the image is 4.6h.

Now, using the magnification formula:

magnification (m) = height of the image (h') / height of the object (h) = -v/u

Given that the magnification is 4.6, we can write:

4.6 = 4.6h / h = -v / u

Simplifying this equation, we get:

-4.6u = v

Now, substituting the values into the lens formula, we have:

1/68 = 1/(-4.6u) - 1/u

To solve for u, we can combine the fractions:

1/68 = (-1 + 4.6) / (-4.6u)

1/68 = 3.6 / (-4.6u)

Cross-multiplying, we find:

-4.6u = 3.6 * 68

Simplifying further:

-4.6u = 244.8

Dividing both sides by -4.6, we get:

u ≈ -53.39 cm

Since the object distance cannot be negative, we take the magnitude of the value:

u ≈ 53.39 cm

Now, we can substitute the value of u into the magnification equation to find v:

4.6 = -v / 53.39

Cross-multiplying and solving for v, we find:

v ≈ -245.74 cm

Taking the magnitude of v, we have:

v ≈ 245.74 cm

To find the distance between the object and image, we add the magnitudes of u and v:

53.39 + 245.74 ≈ 299.13 cm

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Answer: D

Explanation: nuclear fission

Answer:

two attracting magnets are released while moving away from one another.  

Explanation:

Answer:the correct answer is: two attracting magnets are released from hole moving towards one another

Explanation:

The dynamic viscosity is generally greater for liquids, as compared to gases.Viscosity is a measure of the resistance of fluids to flow.

A fluid's viscosity is determined by its internal friction, and it is divided into two categories: dynamic viscosity and kinematic viscosity. Dynamic viscosity, also known as absolute viscosity, is the resistance of fluid to shear or tensile stress, whereas kinematic viscosity is the dynamic viscosity divided by the density of the fluid.

The dynamic viscosity of gases is lower than that of liquids. It implies that gases have a lower resistance to flow than liquids, which have a higher resistance to flow due to their internal friction. As a result, it takes more force to move liquids than it does to move gases.

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The formula Acceleration= 160401 from Physics with Charlie a (10) a (35) = 2 1. fraca(10)a(35)=frac21 is used to get the train's acceleration.

Finally, we may say that acceleration is indeed a fundamental idea in physics that explains how things move. The rate at which an item changes either trajectory or velocity, or both, is referred to as its magnitude of acceleration. Using the equation a = (v - u) / t, one can easily determine the magnitude of acceleration.

|v| =(output + y2) is the formula to calculate a vector's magnitude in two dimensions (x, y). The Pythagorean theorem is the foundation of this formula.

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