How much force will your need to move a 200 pound refrigerator onto a truck bed that is five feet high if you use a 10 foot inclined plane?

Using law of conservation of momentum

\(\\ \sf\Rrightarrow m_1v_1-m_2v_2=(m1+m2)v_3\)

\(\\ \sf\Rrightarrow 1500(5)-3000(7)=(1500+3000)v_3\)

\(\\ \sf\Rrightarrow 7500-21000=4500v_3\)

\(\\ \sf\Rrightarrow -13500=4500v_3\)

\(\\ \sf\Rrightarrow v_3=-3m/s\)

The charge on the bead is approximately 2.16 x 10^(-7) coulombs.

To determine the charge on the bead, we can use the equation that relates the force experienced by a charged particle in an electric field to its mass and acceleration.

The force experienced by the bead can be calculated using Newton's second law of motion, which states that the force (F) acting on an object is equal to its mass (m) multiplied by its acceleration (a):

F = m × a

In this case, the mass of the bead is given as 3.6 g, which is equivalent to 0.0036 kg, and the acceleration is 12 m/s². Therefore, the force acting on the bead is:

F = 0.0036 kg × 12 m/s²

F = 0.0432 N

The force acting on a charged particle in an electric field can be expressed using the equation:

F = q × E

Where q represents the charge on the particle and E is the electric field strength. In this case, the electric field E⃗ = (200,000 N/C, up).

Since the electric field is directed upward, and the force experienced by the bead is also upward, we can conclude that the charge on the bead must be positive. Let's assume the charge is q coulombs.

Using the equation for force in terms of charge and electric field, we can rearrange it to solve for the charge q:

q = F / E

Substituting the values:

q = 0.0432 N / 200,000 N/C

q = 2.16 x 10^(-7) C

Therefore, the charge on the bead is approximately 2.16 x 10^(-7) coulombs.

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Answer:

some symptoms can be lack of energy, and dizziness.

Explanation:

The option c will be correct in Q10.            

Time rate at which an object rotates about axis or at which angular displacement between two bodies changes.

We have given is

r=4i , angular acceleration =   4j

 v= radius×angular acceleration

v= 4i ×k

v=16j

When we cross i× k = j

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Answer:

c. eco

ya que hay trasmisión de energía de un lado al hacer ecos

Answer:

B

Explanation:

A DC motor is powered with Ea = 400V, the armature resistance is Ra = 20, the torque constant of the motor is K+ = 1 Nm/A.

The load torque intercepts the motor torque in two places, only one will be positive, drop you will again need to solve = 0. d the given details are Ea = 400VRa = 20K+ = 1 Nm/A

To find; Gear ratio G required to drive this load at its maximum operating speed.

Formula used: θ=K+ * Ia The motor torque, Tm = K+ * Ia The load torque, TL = J * dw / G The armature current, Ia = (Ea - V) / Ra By equating the motor torque and load torque, we have; K+ * Ia = TL The load torque is positive, so we have;TL = J * dw / G Since the load is operating at maximum speed, d w = 0So, TL = 0 = J * 0 / G

Thus, G is not found in the equation.

So, we can conclude that G does not affect the maximum speed of the motor. The maximum speed is determined by the back EMF, Ea, and the motor constants, K+ and Ra.

So, the gear ratio G is irrelevant in determining the maximum speed of the motor.

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Answer:

Density

Explanation:

The more dense something is, the more packed the particles are. The equation for density is m/v.

Answer:

20 seconds.

Explanation:

A jet plane lands with a speed = 100 meter per seconds

After landing maximum acceleration (deceleration) exerted by the pilot to stop the plane = (-5) meter per seconds square

Final velocity of the plane = 0 m per s²

Equation used to calculate the minimum time to stop the plane before the plane comes to the rest,

v = u + at

where 'v' = final velocity

u = initial velocity

a = acceleration

By substituting the values in the equation,

0 = 100 + (-5)t

t = \(\frac{100}{5}\)

t = 20 seconds

Therefore, plane will require 20 seconds to stop after the landing.

The basic formula is °C + 273.15 = K. The basic formula for converting Fahrenheit into Celsius is (°F − 32) × 5/9 = °C. To convert Fahrenheit degrees into Kelvins, (°F − 32) × 5/9 + 273.15 = K.

When a grasshopper egg hatches, a baby grasshopper called a pupa comes out of the egg and begins to grow. The nymph grasshopper already looks like a grasshopper, it still needs to molt its exoskeleton many times before becoming a full-grown adult therefore the statement which corrects the error in the passage is that a baby grasshopper is a nymph and is therefore denoted as option B.

This is referred to as an external skeleton that supports and protects an animal's body while an internal skeleton such as in humans is referred to as endoskeleton.

During metamorphosis, egg hatches into larva and then to nymph which is referred to as the baby of the insect involved thereby making it the correct choice.

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The full question:

"When a grasshopper egg hatches, a baby grasshopper called a pupa comes out of the egg and begins to grow. Although the nymph grasshopper already looks like a grasshopper, it still needs to molt its exoskeleton many times before becoming a full-grown adult."

Which statement corrects the error in the passage?

Question 3 options:

A baby grasshopper is a larva.

A baby grasshopper is a nymph.

The grasshopper nymph hatches.

The nymph has no exoskeleton

Answer:

Deposition

Explanation:

The correct statement is: Two objects are resolvable if the angle between them is smaller than that given by Rayleigh's criterion.

Rayleigh's criterion, also known as the Rayleigh criterion of resolution, provides a criterion for determining the minimum angle at which two objects can be resolved as separate entities in an optical system, such as a telescope. According to Rayleigh's criterion, two point sources are just resolvable if the central maximum of the diffraction pattern produced by one source coincides with the first minimum of the diffraction pattern produced by the other source.

In practical terms, this means that if the angle between the objects is smaller than the angle determined by Rayleigh's criterion, they will appear as separate and distinct objects. On the other hand, if the angle between the objects is equal to or greater than the angle given by Rayleigh's criterion, they will blend together and cannot be resolved as separate entities.

Therefore, for two objects to be resolvable, the angle between them must be smaller than the angle specified by Rayleigh's criterion. This criterion defines the limit of resolution and is influenced by factors such as the wavelength of light and the aperture size of the optical system.

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In order to create a magnifier in convex lens, you should choose a short focal length that is lesser than 1 meter.

A convex lens is also referred to as converging lens and it can be defined as a type of lens that typically causes parallel rays of light with respect to its principal axis to come to a focus (converge) and form a real image.

In Science, a magnifier refer to an optical instrument that allow us to look at a very near object because its image is generally formed farther away. Thus, the image of the object appears to be much larger.

In this context, you should choose a short focal length that is lesser than 1 meter when you want to create a magnifier in convex lens because the nearer the object is to the lens, the larger would be the image formed.

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Given data

*The given initial velocity of the football is v = 20.2 m/s

*The angle above the horizontal is

*The value of the acceleration due to gravity is a = -9.8 m/s^2

The vertical component of the velocity is calculated as

The formula for the time required by the ball to reach the maximum height is given by the equation of motion as

*Here v_f = 0 m/s is the final velocity of the football at maximum height

Substitute the known values in the above expression as

The total time is taken by the football before it hits the ground is calculated as

An engine moves a boat through the water at a constant speed of 15 m/s. The engine must exert a force of 6.0 kN to balance the force that the water exerts against the hull. Power is the measure of how fast work can be done. The unit of power is watts (W), which can be defined as the amount of work done in one second.

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Answer:

Explanation:

Redshift of Galaxies. The redshift of distant galaxies means that the Universe is probably expanding. ...

Microwave Background. Very early in its history, the whole Universe was very hot. ...

Mixture of Elements. As the Universe expanded and cooled down, some of the elements that we see today were created. ...

Looking back in time.

The earliest and most direct observational evidence of the validity of the theory are the expansion of the universe according to Hubble's law (as indicated by the redshifts of galaxies), discovery and measurement of the cosmic microwave background and the relative abundances of light elements produced by Big Bang ...

The contradictions between Big Bang theory predictions and observations are not at all limited to those that have been widely dubbed a “Crisis in Cosmology”.  Despite the continuing popularity of the theory, essentially every prediction of the Big Bang theory has been increasingly contradicted by better and better data, as shown by many teams of researchers. The observations are, on the other hand, consistent with a non-expanding universe with no Big Bang. The real crisis in cosmology is that the Big Bang never happened.

Key contradicted predictions (detailed descriptions below):

1) Light elements: Lithium and Helium

Prediction: Any superhot explosion throughout the universe, like the Big Bang, would have generated a certain small amount of the light element lithium and a large amount of helium.

Observation: Yet as astronomers have observed older and older stars, the amount of lithium observed has gotten less and less, and, in the oldest stars is less than one tenth of the predicted level. The oldest stars near to us have less than half the amount of helium predicted. However, well-understood fusion processes in stars and reactions initiated by cosmic rays have accurately predicted the correct amounts of these and other light elements.

2) Antimatter-matter annihilation

Prediction: Since the intense radiation of the Big Bang would produce matter and antimatter in equal amounts, mutual annulation of particle-antiparticle pairs would reduce the surviving matter density to around    10 -17 protons/cm3.

Observation: the matter density in the universe is observed to be at least 10 -7 ions /cm3 more than 10 billion times higher than the Big Bang prediction.

Big Bang fix to prediction: To try to fix this well-known vast gap, Big Bang theorists have proposed some unknown asymmetry between matter and antimatter which would lead to more production of matter. This has never been observed in laboratory experiments. A consequence of this predicted imbalance is the decays of the proton, initially predicted to decay with a lifetime of 1030 years. Large scale experiments have contradicted this prediction was well, with no evidence of decay at all.

3) Surface-Brightness

Prediction: In any expanding universe, an optical illusion makes objects at high redshift appear larger and dimmer, so their surface brightness—the ratio of apparent brightness to apparent area—declines sharply with redshift.

Observation: Based on observations of thousands of galaxies, surface brightness is completely constant with distance, as expected in a universe that is NOT expanding.

Big Bang fix to Prediction: After observations showed that the surface brightness dimming did not occur, Big Bang theorists hypothesized that galaxies were much smaller in the distant past and have grown greatly. But observations have contradicted this fix as well, showing that there have not been enough galaxy mergers for the growth rates needed. In addition, the ultra-small galaxies hypothesized would have to have more mass in stars than total mass, an obvious impossibility.

4) Too Large Structures

Prediction: In the Big Bang theory, the universe is supposed to start off completely smooth and homogenous. Structure starts small and grows over time

Observation: As telescopes have peered farther into space, huger and huger structures of galaxies have been discovered, which are too large to have been formed in the time since the Big Bang.

This research tests a striking 1930s prediction of Big Bang hypothesis that objects at great distances should actually appear larger, not smaller. According to the hypothesis, this is because of an optical illusion due to the galaxies having been much closer when their light was emitted.

This prediction was repeated in the literature through the 1980s but in the 1990s, the Hubble Space Telescope did not confirm the prediction. Hubble’s images instead showed that the most distant galaxies do in fact look the smallest. A group of researchers then formulated an additional hypothesis that galaxies actually grow in size with time.      

Many researchers, including Dr. Scarpa, have demonstrated evidence that a small modification of gravitational forces, termed MOND, could also explain the data.  

Answer:

b. A steel paper clip near a magnet

Explanation:

A steel paper clip near a magnet is an object that most likely has magnetic domains because of its inner composition.

A magnetic domain is a part or region within a magnetic substance in which the magnetization is present in a uniform direction.

So we can conclude that a steel paper clip near a magnet is an object that most likely has magnetic domains because of its inner composition.

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To calculate the electric potential (V) at the point where the electric potential energy of a 10 nC charge is 36 mJ, we can use the formula: V = U / q where U is the electric potential energy and q is the charge.

So, we have:

V = U / q = 36 mJ / 10 nC

Converting mJ to J and nC to C, we get:

\(V = (36 × 10^-3 J) / (10 × 10^-9 C) = 3.6 × 10^7 V\)

Therefore, the electric potential at this point is 3.6 × 10^7 volts.

If a 20 nC charge were placed at this point, its electric potential energy (U) would be:

U = q × V = 20 nC × 3.6 × 10^7 V

Converting nC to C, we get:

\(U = 20 × 10^-9 C × 3.6 × 10^7 V = 0.72 J\)

Therefore, the electric potential energy of a 20 nC charge at this point would be 0.72 joules.

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The kinematics and conservation of momentum relationships allow to find the results for the questions about the measurements and conditions to know the accident conditions are:

     1) The principles of conservation of momentum  and kinematics.

     2)  \(\theta = tan^{-1} \frac{P_{01}}{p_{02}}\)

     3) The factors that influence the direction and distance traveled are:

         The initial speed of the vehicles

         The mass of the vehicles

         Pavement conditions: dry, wet, humid, with dirt or loose sand.

1) Kinematics studies the movement of bodies, they look for relationships between position, speed and acceleration.

To analyze the accident, you must answer a question such as what speed the vehicles had before the accident, this is the initial speed of each one and their directions.

When reviewing the kinematics relationships we have.

        \(v^2 = v_o^2 - 2 a x\)  

Where the acceleration is given by Newton's second law.

        fr = m a

The friction force is given by the expression.

       fr = μ N  

       fr = μ mg

Let's Substitute.

         μ m g = m a

         a = μ g

The friction coefficient is tabulated, for different types of rubber, pavement and wet,  dry conditions, etc.

Therefore, the researcher must measure the braking distance of the vehicles, which can be taken from the mark of the tires on the road and note the condition of the pavement if it is dry or wet and the visibility of the day.

This is the speed of the vehicles just after the impact, using the law of conservation of momentum you can find the speed of the vehicles before the impact

        \(p_o = p_f\) \f

Where this is a vector expression, which in general is solved with the components of each directional.

Consequently to answer the questions you must use the principles of conservation of momentum  and kinematics.

2) If the vehicles travel at right angles and their masses are similar, the direction after the collision  in each direction.

           \(tan \theta = \frac{p_{01}}{p_{02}}\)  

           \(\theta = tan ^{-1} \frac{p_{01}}{p_{02}}\)  

3) The factors that influence the direction and distance traveled are:

     The initial speed of the vehicles

     The mass of the vehicles

     Pavement conditions: dry, wet, humid, with dirt or loose sand.

In conclusion, using the kinematics and conservation of momentum relationships, we can find the answers to the question about measurements and conditions to know the accident conditions are:

      1) The principles of conservation of momentum  and kinematics.

     2)  \(\theta = tan^{-1} \frac{P_{01}}{p_{02}}\)

     3) The factors that influence the direction and distance traveled are:

         The initial speed of the vehicles

         The mass of the vehicles

         Pavement conditions: dry, wet, humid, with dirt or loose sand.

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Answer:

Grounded ( neutral)

Explanation:

In electrical works there are usually safety measures which needs to be specially adhered to.

We have to take into perspective the dangers associated with the open neutral (grounded conductor) which is the main treason why NEC 300.13(B) does not permit the continuity of the grounded(neutral) conductor to depend on a receptacle.

When a fragment of bone containing carbon-14 isotopes of the element carbon is discovered during an archaeological dig, and it is estimated to be approximately 23,000 years old, one can calculate the proportion of the carbon-14 isotopes that remains.

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Yes, the weight of the suspension clamps is omitted from the calculation as long as each side of the support is the same.

Suspension clamps are mainly used for overhead power lines or substations. It can hang wire, lightning protection wire on insulator string, or lightning protection cable on the tower by connecting fittings. Suspension clamps are mainly made of malleable iron and aluminum alloy.

Given the same number of clamps on both sides of the support, when we calculate the torque, the weight of the clamps will disappear from each side.

Like there are 2 clamps on each side so the torque due to the clamps are going to be

                  τ = r x F = 2 * W * d - 2 * W * d          

So that the weight of the clamps can be omitted as in the final calculation of the torque as each clamp will cancel out. Provided that the position of the clamps on both sides of the support is the same (i.e., distance d from the support)

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Answer: It is an observation which cannot be explained.

Answer:

c is the right answer

Explanation:

I just finished the test.

A. Yes, the request is worthwhile to make as it would enable the camp to have a clearer image when they are using the remote surgery equipment.

Surgery is a medical procedure that involves the physical manipulation of a bodily structure or tissues to diagnose, prevent, or cure an ailment. It includes operations such as cutting, dissecting, removing, or repairing body tissues or organs. Surgery is a form of treatment that can be used to repair broken bones, treat cancer, and reconstruct facial features.

B. Yes, the request relates to the users' needs as they need a faster Internet connection in order to transmit enough pixels to get a clear image.
C. A possible constraint that might cause the request to be denied is the cost of the faster Internet connection.
D. Evidence that could be used to support the request includes statistics on the current Internet connection speed, the cost of the faster connection, and the benefits of the better image quality.

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The formula to calculate the utilization of the second activity in a push system can be determined by dividing the total time spent on the second activity by the total time available.

In a push system, activities or tasks are performed sequentially, and the completion of one activity triggers the start of the next activity. The utilization of activity refers to the proportion of time that the activity is being used or occupied.

To calculate the utilization of the second activity in a push system, we need to determine the total time spent on the second activity and divide it by the total time available. The formula can be expressed as:

Utilization of Second Activity = (Time spent on Second Activity / Total Time Available) * 100

The time spent on the second activity refers to the duration or amount of time required to complete that specific activity. The total time available represents the total duration or available time for the entire process or system.

By using this formula, we can determine the utilization of the second activity, which provides insight into how efficiently the activity is being utilized within the overall system.

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The wave velocity is found to be v = w/k.

The velocity associated with the disturbance propagating in the given medium is defined as wave velocity; in other words, wave velocity is the distance traveled by waves per unit of time.

The wave velocity is determined by the medium employed.

The wave velocity is often referred to as the phase velocity.

The perturbations in wave motion pass across the medium as a result of the particles' recurrent periodic oscillations. The velocity of the wave will differ from the velocity with which the particles vibrate about their mean positions. The wave velocity will always be constant, while the particle velocity will vary over time.

Given that

E = E₀ sin(kx-wt)j

B = B₀ sin(kx-wt)j

E₀ - Amplitude of electric field

B₀ - Amplitude of magnetic field

and k = 2π/λ

λ = 2π/k

and w = 2πn

where n is the angular frequency

Thus, the velocity of the wave

v= nλ

v = (w/2π) (2π/k)

v = w/k

Thus, the velocity of the wave is v = w/k.

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Physical symbols are not exclusively associated with the surface level of organizational culture is false.

Organizational culture consists of multiple layers, including the surface level, espoused values, and underlying assumptions. Physical symbols, such as logos, office design, and dress code, can be part of the surface level of organizational culture, but they can also reflect deeper values and assumptions. While physical symbols are visible and tangible manifestations of culture, they can carry different meanings and interpretations based on the context and the shared understanding within the organization.

Therefore, it is incorrect to categorize physical symbols solely as part of the surface level of organizational culture. While they can be observed on the surface, their impact and meaning often extend to deeper levels of cultural understanding within the organization.

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Answer

As the earth is an oblate spheroid, its radius near the equator is more than its radius near poles. Since for a source mass, the acceleration due to gravity is inversely proportional to the square of the radius of the earth, it varies with latitude due to the shape of the earth.

Explanation: