a student drops a water balloon out of a dorm window 14 m above the ground. what is its speed when it hits the ground?

In relation to line locators, conductive refers to a direct connection between the pipe and transmitter. Conductive locating involves connecting a transmitter to a metallic pipe or cable and then using a receiver to detect the signal transmitted through the pipe or cable.

The transmitter sends an electrical signal through the conductive material, which is then picked up by the receiver. This technique is particularly useful when locating pipes or cables that are buried underground or hidden behind walls. By using conductive locating, line locators can accurately determine the location, depth, and direction of the pipe or cable. In contrast, an indirect connection with radio waves, as in option B, is referred to as inductive locating, which involves detecting the electromagnetic field around the pipe or cable. While inductive locating can be useful in some situations, such as locating non-conductive pipes or cables, it is less accurate than conductive locating. Overall, conductive locating is a key technique used by line locators to accurately and efficiently locate buried or hidden pipes and cables.

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For a UV radiation with a 200 nm wavelength is mathematically given as the maximum kinetic energy, in eV, of photoelectrons ejected from the gold

K.E=1.779*10^{19}J

K.E=1.112ev

Generally, the equation for the photo electric equation  is mathematically given as

\(hc/\lambda=K.E+\phi\)

Therefore

K.E=(6.626*10^{-34}*3*10^8/2*10^{-7})-5.1*1.6*10^{-19}

K.E=1.779*10^{19}J

In conclusion, in eV, of photoelectrons ejected from the gold

K.E=1.112ev

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Answer:  D. 37.6 m/s

Explanation: its D

Answer:In physics, motion is defined as a change in the position of a body with respect to a reference point. ... Think about the motion of three cars: one in the fast-moving carpool lane, another in the middle lane, and the third in the slow lane used to enter or exit the freeway.

Explanation:

Answer:

The speed of sound can be gotten by simply finding the average of the results.

=0.756s

It is advisable for the students to repeat 5 times because it allows them to (a) estimate the variability of the results (how close to each other they are) and (b) to increase the accuracy of the estimate.

The two vectors are linearly dependent when there are constants c1, c2, not both equal to zero, such that the vector equation c1 BOA + c2 BOB = 0 holds true.

Here, let's check for which values of h the vectors BOA and BOB are linearly dependent. Vector BOA = Vector BOB = <2h-1, h-1, 3-2h>.

We have to find the value of h for which the two vectors BOA and BOB are linearly dependent.

In order to do this, we need to determine the values of c1 and c2 that will satisfy the equation below:c1 (h-1) + c2 (2h-1) = 0c1 (2-h) + c2 (h-1) = 0c1 (h+1) + c2 (3-2h) = 0.

For the vectors to be linearly dependent, we have to check whether the system of equations above has non-trivial solutions, i.e. solutions where c1 and c2 are not both zero (when both are zero, we get the trivial solution).

From the first equation: c1 (h-1) + c2 (2h-1) = 0⇒ c1 (1-h) = c2 (2h-1)If h = 1, then both sides of the equation become 0. Thus, any value of c1 and c2 will satisfy this equation. Therefore, for h = 1, BOA and BOB are linearly dependent.  Answer: h = 1.

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Most changes that encourage employees to become more ethical are targeted at encouraging ethical behavior.

Organizations can encourage ethical behavior among employees through various means. These include providing training and education on ethical principles, codes of conduct, and compliance policies. Such training can help employees understand the importance of ethical behavior and the potential consequences of unethical actions.

Creating a culture of transparency and accountability is another way to promote ethical behavior. This can be achieved by encouraging open communication, implementing whistleblower protection programs, and holding regular ethics training and discussions. Employees need to be confident that their concerns will be heard and addressed, and that they will not face retaliation for speaking up.

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The complete question is:

Fill in the blanks:

Most changes that encourage employees to become more ethical are targeted at ____________

Answer:

Describe the limitations in detail in their final report

Explanation:

just did test

Answer:

a)  T = 1.26 s , b)  v_max = 0.14 m / s ,  a_max = 0.7 m / s²

c) x = 0.028 cos (5 t) ,    v = - 0.14 sin 5t,   a = - 0.7 cos 5t

Explanation:

This is a simple harmonic motion exercise that is described by the equation

    x = A cos (wt +Ф)

with

          w = √ (k / m)

let's apply this expression to our case

a) Angular velocity is related to frequency

          w = 2π f

frequency and period are related

          f = 1 / T

we substitute

         2π / T = √ (k / m)

         T = 2π √(m / k)

let's calculate

         T = 2π √(1/25)

          T = 1.26 s

In the expression for the period, the amplitude does not appear, therefore there is no dependence, as long as Hooke's law is fulfilled, which is correct for small amplitudes.

b) in the initial equation we have the position as a function of time, let's use the definition of speed and acceleration

           v = dx / dt

           v = - A w sin (wt + Ф)

the speed is maximum when the sine is -1

            v_max = A w

            w = √ (k / m)

            w = √ 25/1

            w = 5 rad / s

the amplitude of the movement is equal to the maximum compression of the spring

            A = 2.8 cm = 0.028 m

we substitute

            v_max = 0.028 5

            v_max = 0.14 m / s

acceleration

             a = dv / dt

             a = - A w² cos (wt + Ф)

the acceleration is maximum when the cosine is -1

             a_max = A w²

let's calculate

             a_max = 0.028 5²

             a_max = 0.7 m / s²

c) let's start by finding the phase constant

              v = -A w cos (wt + Ф)

at t = 0 they indicate that the system has v = 0

              0 = -A w sin (0 + Ф)

              Ф = sin⁻¹ 0

              Ф = 0

we write the equation

            x = 0.028 cos (5 t)

           v = - A w sin (wt + Ф)

           v = - 0.028 5 sin (5t + 0)

           v = - 0.14 sin 5t

acceleration

           a = - A w² cos (wt + Ф)

           a = - 0.028 5 2 cos (5 t + 0)

           a = - 0.7 cos 5t

The average rate of aftershocks 100 days after a magnitude 7 event can be estimated based on the assumption that the rate of aftershocks follows a decay pattern over time. A commonly used model for this is the Omori's law.

Omori's law states that the rate of aftershocks decreases with time following a power-law decay. However, estimating the specific value of the average rate 100 days after the event requires knowledge of the parameters of the decay model, such as the exponent and initial rate.

Without those specific parameters, it is not possible to provide an accurate estimation of the average rate of aftershocks 100 days after the magnitude 7 event. Additionally, the behavior of aftershocks can vary depending on the specific earthquake and geological conditions.

It is important to consult seismologists and earthquake experts who can analyze the specific details of the event and the region to provide a more accurate estimation of the aftershock rates.

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The frictional force reduces the block's kinetic energy and causes negative work to be done on it.

Kinetic energy is the energy that a thing has when it is moving. An item can only be accelerated through the application of a force. Applying force requires effort on our part. Following completion of the work, energy is transferred towards the object, which then moves at such a new, constant speed.

Kinetic energy appears to be the driving force behind motion, as evidenced by the way objects and subatomic particles move. Every particle & moving object contains kinetic energy. Examples of kinetic energy in motion include walking, a baseball flying through the air, food falling off a table, and just a charged particle within an electric field.

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Answer:

75m

Explanation:

Given parameters:

Distance covered by the boat = 15m

Time taken = 8s

Unknown:

Distance covered by the boat in 40s  = ?

Solution:

To solve this problem, we need to find the speed of the boat first;

    Speed = \(\frac{distance}{time}\)

Insert the parameters and solve;

    Speed  =\(\frac{15}{8}\) m/s

Now;

The boat will travel;    

    Distance  = speed x time

    Distance =   \(\frac{15}{8}\)  x 40  = 75m

1c. The goal of technology is to improve how people live. For example a toothbrush helps prevent cavities and buildup on our teeth.

2a. Science and technology both help improve our lives. Science gives us the knowledge we need to create technology.

2b. A human prosthetic is an example of technology.

2c. Prosthetics are created though scientific study and research. Technology is used to create the material prosthetics are made of and to help design the prosthetics.

3a. Benefits of pesticides: Keeps bugs away from crops, higher crop yields.

Negatives:

pollution, harmful to health

I got all of them except the last one

Answer:

it is called fluid friction.

Radial component of the linear acceleration = 99.47 m/s^2

The diameter of the wheel, d = 51 cm

The radius, r = d/2 = 51/2 = 25.5 cm

r = 25.5/100 = 0.255 m

r = 0.255 m

At t = 1.1, first calculate the new angular velocity

The radial component of the linear acceleration is given as:

Diamond at 20°C is expected to have the greatest index of refraction.

The index of refraction is a property that describes how light propagates through a medium. It is a measure of how much the speed of light is reduced when passing through a particular material. The higher the index of refraction, the slower light travels through that material.

Among the given options, diamond is known for having a very high index of refraction. This is due to its dense molecular structure and high refractive index value, which is approximately 2.42. Diamond's unique crystal lattice and high optical density result in a substantial bending of light as it passes through the material.

Carbon dioxide at 0°C, liquid water at 20°C, and other materials generally have lower indices of refraction compared to diamond. While carbon dioxide and liquid water can refract light to some extent, their refractive indices are significantly lower than that of diamond.

Among the given options, diamond at 20°C is expected to have the greatest index of refraction. Its dense molecular structure and high refractive index value allow for a significant bending of light as it passes through the material.

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Answer:

electrical- mechanical

Explanation:

Smartness 1,000

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The acceleration of the cart is 3.1 cm/s^2 (rounded to the nearest tenth).

To find the acceleration of the cart, we can use the formula:

acceleration = (change in velocity) / time

The change in velocity is the difference between the final velocity and the initial velocity. In this case, it is:

change in velocity = 8.2 cm/s - 3.5 cm/s = 4.7 cm/s

The time taken to achieve this change in velocity is 1.5 seconds.

Now, we can calculate the acceleration:

acceleration = (4.7 cm/s) / (1.5 s) = 3.1 cm/s^2.

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Answer:

It will take 9 hours

Explanation:

If a car travels 100 km per hour and 900 km is divided by 100 it will take 9 hours to travel.

Answer:12

Explanation:

Answer:

Approximately \(52\; {\rm ^\circ C}\) (approximately \(325\; \rm K\)), assuming that nitrogen is an ideal gas.

Explanation:

Let \(R\) denote the ideal gas constant. By the ideal gas law, the following equation would relate these quantities:

\(P \cdot V = n \cdot R \cdot T\).

Rearrange this equation to obtain an expression for \(T\):

\(\begin{aligned}T &= \frac{P \cdot V}{n \cdot R}\end{aligned}\).

Look up the ideal gas constant: \(R \approx 8.314\; \rm Pa \cdot m^{3} \cdot K^{-1} \cdot mol^{-1}\).

Convert each measurements from the question to standard units:

Substitute these values into the expression for \(T\):

\(\begin{aligned}T &= \frac{P \cdot V}{n \cdot R} \\ &\approx \frac{101.3\times 10^{5}\; \rm Pa \times 0.080\; \rm m^{3}}{3.0\; \rm mol \times 8.314\; \rm Pa \cdot m^{3} \cdot K^{-1} \cdot mol^{-1}} \\ &\approx 324.91\; \rm K\end{aligned}\).

Convert the unit of this temperature to degrees celsius:

\(\begin{aligned} & 324.91\; \rm K \\ =\; & (324.91 - 273.15)\; {\rm ^\circ C} \\ \approx \; & 52\; {\rm ^\circ C} \end{aligned}\).

Both the assertion and the reason given are true.If the mass of the object is less, the acceleration produced by the force will be more. Hence, the acceleration produced by the force is directly proportional to the magnitude of the force and inversely proportional to the mass of the object.

The given assertion: When astronauts throw something in space, that object would continue moving in the same direction and with the same speed; and the given reason: The acceleration of an object produced by a net applied force is directly related to the magnitude of the force, and inversely related to the mass of the object are both correct.Astronauts are capable of throwing objects in space because they are beyond Earth's gravity and do not have to deal with any significant air resistance. In the absence of other forces like friction or air resistance, the initial velocity will be conserved, and the object will continue to move with the same speed and direction. The object would continue to move in a straight line with the same speed because no external force acts on it to change the object's state of motion.Newton's second law states that the force of an object is directly proportional to its acceleration, but inversely proportional to its mass. F=ma, where F is force, m is mass, and a is acceleration. Therefore, if the mass of the object is less, the acceleration produced by the force will be more. Hence, the acceleration produced by the force is directly proportional to the magnitude of the force and inversely proportional to the mass of the object.

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The clock would run too slowly in Camrose.

Since the period of the pendulum T = 2π√(L/g) where L = length of clock and g = acceleration due to gravity.

Now since g = 9.800 m/s² in San Francisco and g = 9.811 m/s² in Camrose, we see that g increases.

From the expression for the period T, since L is constant, we find that

T ∝ 1/√g

Since g increases, so, T would decrease.

Thus, the clock would run too slowly in Camrose.

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The work done by the three students is 3,000 J.

The energy transferred in the process is 3,000 J.

W = Fd

The work done by the three students is calculated as follows;

W = 300 x 10

W = 3,000 J

The energy transferred in the process is determined by work energy theorem.

E = W

E = 3,000 J

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The most likely source of error would be human error such as delay in stopping the stopwatch. The coordination error would be the source of error.

On Earth, the speed of sound as calculated experimentally at sea level assuming a default air temperature of 59 degrees Fahrenheit (15 degrees Celsius) is 761.2 mph (1,225 km/h). The speed of sound is slowed down because gas molecules move more slowly at lower temperatures.

Thus, sound tends to move faster in warmer air.

To explain what speed of sound is, the speed of sound can be described as the distance travelled per unit of time by any sound wave as it propagates through a completely elastic medium.

At 20 °C, temperature the speed of sound in air is about 343 meters per second, or one kilometer in 2.91 s or one mile in 4.69 s.

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Answer:

The change that has to take place inside the power cord in order for the device to function properly include;

The changing of the alternating current (AC) from the electrical outlet to the direct current having a specific voltage and current value with which the device can be powered

Explanation:

A battery powered device makes use of direct current (DC) electric power from a battery, while the power normally given out at an electrical outlet comes as an alternating current (AC) electric power source.

The power cord for battery-powered device, also known as an AC/DC adapter, that allows them to be plugged into electrical outlets converts the AC electric current it obtains from the electrical outlets to DC electrical current of the appropriate voltage and amperage that the device can make use of for electric power to function and for charging the battery which is the power source for the device

Therefore, the change that has to take place in the power cord is the conversion of the electric outlet alternating current (AC) voltage and amperage values, into direct current (DC) of the required voltage and current for the device

Answer:

The net force on the skater is zero. (\(F_{net} = 0\,N\))

Explanation:

According to Newton's First Law, an object is at equilibrium when either it is at rest or moves at constant velocity, which means a net force of zero. Based on the given statement, there are no external forces acting on skate and, therefore, the net force on the skater is zero. (\(F_{net} = 0\,N\))

Quantization of electron energy states in an atom is a fundamental concept in atomic physics and quantum mechanics. It refers to the discrete and distinct energy levels that an electron can occupy in an atom.

This quantization is better understood in terms of the electron's wave-like nature. The electron behaves like a wave, and its energy is related to the wavelength and frequency of the wave.
The wave-like behavior of the electron was first proposed by Louis de Broglie in 1924, and it was later confirmed by experiments. According to de Broglie's theory, electrons have wave-particle duality, meaning that they can exhibit both wave-like and particle-like behavior. When an electron is confined to an atom, its wave-like behavior leads to the quantization of energy levels.
The quantization of energy levels in an atom arises from the fact that electrons can only occupy specific orbitals around the nucleus. These orbitals have specific energies associated with them, and the electron can only exist in one of these energy levels. When an electron absorbs or emits energy, it must do so in discrete packets or quanta, which correspond to the energy difference between the energy levels.
In summary, the quantization of electron energy states in an atom is a consequence of the wave-like nature of the electron. It arises from the fact that electrons can only occupy specific orbitals around the nucleus, and their energies are quantized in these orbitals. This concept is fundamental to our understanding of atomic structure and has important implications for a wide range of fields, including chemistry, materials science, and electronics.

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