HELP PLEASE
A cyclist and his bicycle have a combined mass of 88 kg and
a combined weight of 862.4 N. The cyclist accelerates at 1.2
m/s2. After 2 seconds he reaches a speed of 2.4 m/s. What is
his momentum at this point?
A. 359.3 kg.m/s
B. 105.6 kg.m/s
C. 211.2 kg-m/s
O D. 36.7 kg-m/s

Answer:

1. A car moving 40 mph has four times as much kinetic energy as one moving 20 mph, while at 60 mph a car carries nine times as much kinetic energy as at 20 mph. Thus a modest increase in speed can cause a large increase in kinetic energy.

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Answer:

a car moving 40mph has four times as much kinetic energy as one moving 20 mph, while at 60 mph a car carries nine times as much kinetic energy as at 20 mph.

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Explanation:

v= (f) x ( lambda)

1.7 ms^-1/12.05 m = f =o.14 hz

When the light was turned on in the aquarium, the amount of carbon in the form of carbon dioxide (CO2) decreased as a result of the photosynthesis that the plants were performing.

Generally speaking, the carbon is flowing from the water (in the form of carbon dioxide) into the plants through photosynthesis, and then into the fish when they consume the plants.

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Answer:

If the driver is wearing a seat belt, the seat belt rather than the windshield applies the unbalanced force that stops the driver's forward motion. The force from the seat belt is applied over a longer time, so the force causes less damage.

Explanation:

Answer:19.51%

Explanation:

The load is inductive or capacitive depending on whether the imaginary part of the impedance (Z) is positive or negative. In this case, the imaginary part of Z is 60 Ω, which is positive. Therefore, the load is inductive.

The power factor (PF) can be determined by taking the cosine of the angle of the impedance. In this case, the angle is 30 degrees. So, the power factor is given by:

PF = cos(30°) = 0.866

Therefore, the power factor is 86.6%.

The power (P) can be calculated by multiplying the magnitude of voltage (V) with the magnitude of current (I) and then multiplying it by the power factor (PF). In this case, the magnitude of voltage is 1500√2 volts and the power factor is 0.866. Assuming the load is purely resistive, the current magnitude can be calculated using Ohm's law:

I = V / Z = 1500√2 ∠ 30° / (70 + j 60) = 17.32∠-18.44° A

Therefore, the power is:

P = |V| * |I| * PF = 1500√2 * 17.32 * 0.866 = 36722.86 watts (or 36.7 kilowatts)

The reactive power (Q) can be calculated by multiplying the magnitude of voltage (V) with the magnitude of current (I) and then multiplying it by the sine of the angle of the impedance. In this case, the angle is 30 degrees. So, the reactive power is:

Q = |V| * |I| * sin(30°) = 1500√2 * 17.32 * sin(30°) = 10000 VAR

The apparent power delivered to the load (S) can be calculated by multiplying the magnitude of voltage (V) with the magnitude of current (I). In this case, the apparent power is:

S = |V| * |I| = 1500√2 * 17.32 = 25985.08 volt-ampere (or 25.99 kilovolt-ampere)

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The final equilibrium temperature (in °C) of the system when ice and water vapor are combined can be calculated using the principle of energy conservation and the specific heat capacities of ice and water.

To determine the final temperature, we can apply the equation:

(m₁ * c₁ * ΔT₁) + (m₂ * c₂ * ΔT₂) = 0

Where:

- m₁ is the mass of ice (22.0 kg)

- c₁ is the specific heat capacity of ice (2.09 J/g·°C)

- ΔT₁ is the change in temperature of ice (final temperature - 0.00 °C)

- m₂ is the mass of water vapor (4.80 kg)

- c₂ is the specific heat capacity of water (4.18 J/g·°C)

- ΔT₂ is the change in temperature of water (final temperature - 100.0 °C)

Solving for the final temperature, we find:

(22.0 kg * 2.09 J/g·°C * ΔT₁) + (4.80 kg * 4.18 J/g·°C * ΔT₂) = 0

Substituting the given values, we can solve for ΔT₁ and ΔT₂. Once we have those values, we can find the final temperature by adding ΔT₁ to 0.00 °C.

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The angle of refraction \(theta_{b}\) is approximately 20.5 degrees when light strikes the air/glass interface at an incidence angle of 32.0 degrees, assuming an index of refraction of 1.50 for glass.

Assuming that light travels from air into glass, the angle of refraction \(theta_{b}\) can be calculated using Snell's law, which relates the angles of incidence and refraction to the indices of refraction of the two materials:

n_a * sin(\(theta_{a}\)) = n_b * sin(\(theta_{b}\))

where n_a and n_b are the indices of refraction of air and glass, respectively, and theta_a and \(theta_{b}\) are the angles of incidence and refraction, respectively.

Using n_a = 1 and n_b = 1.50, and \(theta_{a}\) = 32.0 degrees, we can solve for \(theta_{b}\):

1 * sin(32.0) = 1.50 * sin(\(theta_{b}\))

sin(\(theta_{b}\)) = (1/1.50) * sin(32.0) = 0.355

\(theta_{b}\) = arcsin(0.355) = 20.5 degrees

Therefore, the angle of refraction \(theta_{b}\) is approximately 20.5 degrees when light strikes the air/glass interface at an incidence angle of 32.0 degrees, assuming an index of refraction of 1.50 for glass.

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If two vehicles approach an uncontrolled intersection at about the same time the driver of the vehicle on the left shall yield the right-of-way to the vehicle on the right.

A driver proceeding through an uncontrolled intersection must yield to a vehicle to their right, as that vehicle has the right of way even though the two vehicles arrived at the same time.

At an uncontrolled intersection, the Vehicle A driver must yield to traffic on its right and proceed with caution only when it is safe to do so. Therefore, they would be found 100% responsible.

Therefore when two vehicles approach an uncontrolled intersection on the same side then the vehicle on the left shall yield the right-of-way to the vehicle on the right.

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Answer: At the antinodes of a standing wave, the wave is shaking very rapidly, causing those parts of the pizza to get hot. At the nodes, the wave is not shaking much at all, causing those parts of the pizza to stay cold."

Explanation:

antinodes vibrate and are the opposite of nodes which are stationary.

Some parts of the pizza are hot while others are still cold. Because the antinodes of a standing wave shake very quickly, causing the hot spots on the pizza to appear.

The fact that there are locations along the medium that appear to be standing still is a feature of every standing wave pattern.

The term "node" refers to these sites, which are also known as "points of no displacement." Other sites along the medium are subjected to vibrations with substantial positive and negative displacements.

During each vibrational cycle of the standing wave, these are the locations that experience the most displacement. These points are termed "antinodes" because they are the polar opposites of nodes.

The antinodes of a standing wave shake very quickly, causing the hot spots on the pizza to appear. The wave isn't moving very much at the nodes, therefore those areas of the pizza stay cold."

Hence some parts of the pizza are hot while others are still cold.

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Answer:

Explanation:

To find the volume of the object we use the formula

volume of object = final volume of water - initial volume of water

From the question

final volume of water = 86 mL

initial volume of water = 75 mL

So we have

volume of object = 86 - 75

We have the final answer as

Hope this helps you

The measure of central tendency that should be used to calculate the cutoff time for the final race is the median.

Option C.

The median is the middle point in a dataset—half of the data points are smaller than the median and half of the data points are larger.

To find the median: Arrange the data points from smallest to largest. If the number of data points is odd, the median is the middle data point in the list.

So from the given data of the 100 meter dash, the measure of central tendency that should be used to calculate the cutoff time for the final race is the median.

The median will help to separate half of the data points that are smaller than the cutoff time and half of the data points are larger than the cutoff time.

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If another light bulb is connected in parallel to the first, the current in the power source would increase. The correct answer is option 4, the current would increase.

A parallel circuit refers to an electric circuit in which the current flows through two or more paths simultaneously. In a parallel circuit, every device in the circuit is linked to the voltage supply (battery) individually. As a result, each light bulb receives the full voltage of the battery. The voltage across each device is identical, but the current through each device varies. A parallel circuit has the following properties: It has more than one path. The voltage across each device is the same. The sum of the currents in each device is equal to the total current supplied by the battery. The current is divided between the devices depending on their resistance values, with the smaller resistance device receiving more current.

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Answer:

the balloon is filled with the 8.5 litre of helium. temperature is 294 kelvin.

party starts at 4 p.m.

the temperature rises 305 kelvin.

the new volume = 4 litres

A 3.00-m long pipe is in a room where the temperature is 20°C. If the pipe is closed at one end, the fundamental frequency is 57 Hz.

The frequency at which a standing wave has the lowest frequency is known as the fundamental frequency. It is sometimes known as the first harmonic of the system. The frequency of the second harmonic is twice that of the first harmonic, and the frequency of the third harmonic is three times that of the first harmonic. If a standing wave is established in a pipe,

the length of the pipe and the speed of sound in the pipe establish its fundamental frequency. A formula for calculating the fundamental frequency of a pipe closed at one end is given by

fundamental frequency= (speed of sound)/ (2 * pipe length)Speed of sound in air at 20°C is 343 m/s.

Therefore, the fundamental frequency of a 3.00-m long pipe closed at one end is: fundamental frequency = (343 m/s) / (2 * 3.00 m) = 57.2 Hz Approximately 57 Hz is the correct answer.

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Answer:

After a rain, they will eventually evaporate into water vapor. These airborne water molecules get carried back up into the sky to form clouds and then more rain (or snow or hail). ... So this process of evaporation can help to purify water of some of the big things it might be mixed in with.

Answer:

a) \(m = \frac{2\cdot E_{k}}{v^{2}}\), b) \(v^{2} = \frac{2\cdot E_{k}}{m}\), c) \(v = \sqrt{\frac{2\cdot E_{k}}{m } }\)

Explanation:

a) Translational kinetic energy (\(E_{k}\)), measured in joules, is represented by the following expression:

\(E_{k} = \frac{1}{2}\cdot m \cdot v^{2}\) (1)

Where:

\(m\) - Mass, measured in kilograms.

\(v\) - Velocity, measured in meters per second.

Now we clear the mass within the formula:

\(E_{k} = \frac{1}{2}\cdot m\cdot v^{2}\)

\(2\cdot E_{k} = m\cdot v^{2}\)

\(m = \frac{2\cdot E_{k}}{v^{2}}\)

b) Now we clear the velocity squared:

\(v^{2} = \frac{2\cdot E_{k}}{m}\)

c) Now we clear the velocity:

\(v = \sqrt{\frac{2\cdot E_{k}}{m } }\)

Term used to describe the record that documents the sequence of custody, control, transfer, analysis, and disposition of physical or electronic evidence in digital forensics is called a chain of custody.

A chain of custody is a critical aspect of digital forensics as it provides an unbroken record of the handling of evidence from the time it was collected to the time it is presented in court or used as part of an investigation.

The chain of custody is important to ensure the integrity of the evidence and to demonstrate that it has not been altered, tampered with, or contaminated during the investigation.

The chain of custody should include details such as the date and time the evidence was collected, the name of the person who collected it, the method of storage, and any analysis or testing that was performed.

This information is used to build a clear and comprehensive record that can be used to demonstrate the reliability of the evidence and support the findings of the investigation. In digital forensics, it is essential to maintain a secure and well-documented chain of custody to ensure the validity of the evidence and support the findings of the investigation.

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According to the Skygazer's Almanac for 2022 at 40 degrees, Venus and Saturn will be in opposite parts of the sky on December 17, 2022.

The Skygazer's Almanac provides astronomical information for a specific location and year. In this case, at a latitude of 40 degrees, the almanac indicates that Venus and Saturn will be in opposite parts of the sky on December 17, 2022. This means that Venus and Saturn will appear at opposite sides of the celestial sphere as observed from Earth. However, it's important to note that the almanac's predictions are approximate and can be influenced by various factors, including atmospheric conditions and the observer's specific location. To obtain the most accurate and up-to-date information, it is recommended to consult more recent astronomical sources or use specialized software that can provide precise positions and dates for celestial events.

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Answer:

compaction

Explanation:

Answer:

Glucose

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When a wire carrying a 26-a current travels perpendicular to the field of a powerful magnet, it experiences a 2.16-n force on the 4.00 cm of wire in the field. The average field strength is 1.6T

Less than 30 microteslas (0.3 gauss), which corresponds to most of South America and South Africa, to more than 60 microteslas (0.6 gauss), which corresponds to northern Canada, south of Australia, and parts of Siberia, are the strengths of the fields at the Earth's surface.

The magnitude of the wire whose length is L carrying a current I and making an angle θ with a magnetic field of density B is calculated using the following formula.

B = F/(I * L * Sin(θ)

Given that F = 2.16N

I = 30 A

L = 4cm = 4 * 10^-2m

θ = π/2

By substitution

B = 2.16/(30 * 4 * 10^-2 * Sin(π/2))

B = 1.6T

Hence, the average field strength is 1.6T

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Answer:

Yes, that is correct, although most velocity is calculated via m/s and therfore you would multiply your 3 hours by 60 twice. Much of the information given is irrelevant and just trying to confuse.

Explanation:

a) The pressure at 4.5 m below the surface is 19620 Pa.

(b) The pressure at 5.5 m below the surface is 9810 Pa.

c)  The closer spacing of the bands near the base ensures that the tower is strong enough to withstand the higher pressure.

The pressure at a certain depth in a liquid depends on the density of the liquid and the depth. The pressure at a point below the surface of a liquid can be found using the equation:

P = ρgh

where P is the pressure, ρ is the density of the liquid, g is the acceleration due to gravity, and h is the depth.

(a) The pressure at 4.5 m below the surface can be calculated as follows:

P = ρgh

P = (1000 kg/m³) × (9.81 m/s²) × (6.4 m - 4.5 m)

P = 19620 Pa

Therefore, the pressure at 4.5 m below the surface is 19620 Pa.

(b) The pressure at 5.5 m below the surface can be calculated as follows:

P = ρgh

P = (1000 kg/m³) × (9.81 m/s²) × (6.4 m - 5.5 m)

P = 9810 Pa

Therefore, the pressure at 5.5 m below the surface is 9810 Pa.

(c) The metal bands on the water storage tower are more closely spaced near the base of the tower because the pressure at the base is higher than at the top. The bands provide additional support to the tower, preventing it from collapsing due to the higher pressure at the base. The closer spacing of the bands near the base ensures that the tower is strong enough to withstand the higher pressure.

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i think this is the incomplete page that you are showing but the answer is

:-

Answer:

resistances is inversely proportional to the area of cross section of the conductor

Explanation:

The resistance of a wire is directly proportional to its length and inversely proportional to its cross-sectional area.

hope this helps you

have a nice day:)

Answer:

F = 592238.09 N

Explanation:

To find the mean force you first calculate the acceleration by using the following kinematic equation:

\(v^2=v_o^2+2ax\\\\v_o=0m/s\\\\v=10km/h\\\\x=8.4m\\\\\)

you do "a" the subject of the equation and replace the values of the other parameters:

\(a=\frac{v^2}{2x}=\frac{10000m/s}{2(8.4m)}=595.23\frac{m}{s^2}\)

next, the force, by using the second Newton law is:

\(F=ma=(1000kg)(595.23\frac{m}{s^2})=595238.09\ N\)

hence, the force is 592238.09 N

- - - - - - - - - - - - - - - - - - - - - - - - - - -

TRANSLATION:

Para encontrar a força média, primeiro calcule a aceleração usando a seguinte equação cinemática:

você faz "a" o assunto da equação e substitui os valores dos outros parâmetros:

Em seguida, a força, usando a segunda lei de Newton, é:

portanto, a força é 592238.09 N

To solve a line cut by a transversal, use the properties of parallel lines, such as corresponding angles and alternate interior angles, to find the unknown angle measurements.

When a line is cut by a transversal, a number of simultaneous equations can be formed by using the properties of parallel lines. For example, the corresponding angles of the lines will always be equal, the alternate interior angles will be equal, and the consecutive interior angles will add up to 180 degrees. Using these properties, you can identify the unknown angle measurements. For example, if the measure of one of the corresponding angles is known, the measure of the other corresponding angle can be determined simply by using the fact that they are equal. Similarly, if one of the alternate interior angles is known, the other can be determined using the fact that they are equal. By forming these equations, you can solve for the unknown angle measurements.

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The speed of the wave is 0.42 m/s.

Speed is the rate of change of distance.

To calculate the speed of the wave, we use the formula below,

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

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Complete question: The crests of waves passing into a harbor are 2.1 m

apart and have an amplitude of 60 cm. 12 waves

pass an observer every minute. What is the speed of the wave.

The mechanism that restricts the expression of leptin to adipocytes is the fact that only adipocytes contain the specific gene and regulatory elements required for the production and secretion of leptin.

Leptin is a hormone primarily produced by adipose tissue (fat cells) and plays a crucial role in regulating energy balance and appetite. The gene responsible for producing leptin is called the LEP gene, and it is predominantly expressed in adipocytes. The regulatory elements within the gene control its expression and ensure that leptin is produced specifically in adipocytes. These regulatory elements can be influenced by various factors such as hormones, signaling pathways, and nutritional status.Due to this specific gene expression pattern, leptin is mainly synthesized and released by adipocytes, providing feedback signals to the brain about the body's energy stores. This mechanism allows for the precise regulation of leptin levels and its functions in maintaining energy homeostasis.

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