State keplers law........​

Answer:

momentum= mass x velocity

= 20 x 20 =400kgm/s

The maximum speed of the cycle is 21 m/s.

When the motorcyclist takes the curve on the hill, a net frictional force acts on it towards the center and acts as the centripetal force.

The radius of the hill is = 45 m

Also , the weight of the motorcycle acts downwards and the normal reaction acts upwards. As the motorcycle is on the curve so , a component of the weight acts towards the center.

weight is given by , W = mg

So the net F(friction)  = mg - N = \(\frac{mv^{2} }{r}\)

For loosing contact,  N=0

\(v^{2}\) = rg

v = \(\sqrt{rg}\)

v = \(\sqrt{(45)(9.80)}\)

v = 21 m/s

So the maximum speed of the motorcycle can be 21 m/s.

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The availability of suitable nesting sites is one of the most important limiting factors for the purple martin bird population.  Building more birdhouses can help address this limiting factor and increase the size of the purple martin population in the area.

There are several limiting factors that can decrease purple martin populations, but one of the most important is the availability of suitable nesting sites. Purple martins are cavity-nesting birds, which means they require hollow spaces, such as tree cavities or specially designed birdhouses, to build their nests and raise their young. In areas where suitable nesting sites are scarce, the population of purple martins may be limited by the number of available nesting sites.

Therefore, by building more birdhouses, Latrice is addressing this limiting factor and helping to increase the size of the purple martin population in her area. Other limiting factors for purple martins may include the availability of food, the quality of habitat, and the presence of predators.

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Answer:

10

Explanation:

Answer:

i think its possible yes

Explanation:

(a) The charge of -1.2C corresponds to approximately -7.5 × 10^19 electrons. (b) The mass of this many electrons is approximately 4.8 × 10^-17 kilograms.

(a) To determine the number of electrons necessary to produce a charge of -1.2C, we need to consider the elementary charge. The elementary charge represents the charge carried by a single electron, which is approximately -1.6 × 10^-19 coulombs. Dividing the given charge by the elementary charge, we find the number of electrons.

Number of electrons = -1.2C / (-1.6 × 10^-19C/electron) ≈ 7.5 × 10^19 electrons

(b) To calculate the mass of this many electrons, we utilize the mass of a single electron. The mass of an electron is approximately 9.1 × 10^-31 kilograms. Multiplying the number of electrons by the mass of a single electron, we obtain the mass.

Mass of electrons = (7.5 × 10^19 electrons) × (9.1 × 10^-31 kg/electron) ≈ 4.8 × 10^-17 kilograms

Therefore, the charge of -1.2C corresponds to approximately -7.5 × 10^19 electrons, and the mass of this many electrons is approximately 4.8 × 10^-17 kilograms.

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Answer:

The fireworks give off heat.

Explanation:

To reduce or eliminate vibrations in the pipe, an absorber with a spring stiffness (k2) and trial mass (m2) is attached. The mass ratio of the system is determined by dividing the mass of the absorber (m2) by the mass of the pipe.

To keep the natural frequencies outside the operating speed range of the pump, the required absorber mass (m2) and spring stiffness (k2) need to be calculated.

Calculation:Let's assume the mass of the pipe as m1.Given:

Pump speed = 800 rev/min

Natural frequencies:f1 = 750 rev/minf2 = 1000 rev/min

Operating speed range:

Minimum speed = 700 rev/min

Maximum speed = 1040 rev/min

Calculate the mass ratio:

Mass ratio = m2 / m1

Determine the required values of m2 and k2:

To keep the natural frequencies outside the operating speed range, the following conditions should be satisfied:f1 < 700 rev/min or f1 > 1040 rev/minf2 < 700 rev/min or f2 > 1040 rev/min

We can use the formula for natural frequency:

fn = (k / (2π)) * sqrt(m)

For f1:

750 rev/min = (k2 / (2π)) * sqrt(m2 + m1)

Solve this equation to find the required values of m2 and k2.

For f2:

1000 rev/min = (k2 / (2π)) * sqrt(m2 + m1)

Solve this equation to find the required values of m2 and k2.

Final Answer:

The mass ratio of the system is m2 / m1, and the specific values of m2 and k2 that satisfy the condition can be obtained by solving the above equations.

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(a) The potential energy ( PE )  of the cart at the top of Nob hill is 147,000 J.

(b) The Kinetic Energy of the cart at the bottom of the hill is 147,000 J.

(c) The speed of the cart at the bottom of the hill is 31.3 m/s.

The potential energy ( PE )  of the cart at the top of Nob hill is calculated as follows;

P.E = mgh

where;

P.E = 300 kg x 9.8 m/s² x 50 m

P.E = 147,000 J

The Kinetic Energy of the cart at the bottom of the hill = The potential energy of the cart at the top of Nob hill based on law of conservation of energy.

The speed of the cart at the bottom of the hill is calculated as follows;

v = √ ( 2gh )

v = √ ( 2 x 9.8 x 50 )

v = 31.3 m/s

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To measure the distance to a spiral galaxy estimated to be around 150 million light-years away, you should use the Tully-Fisher relation method.

The Tully-Fisher relation is a technique used to estimate the distance to spiral galaxies by correlating their observed rotation velocities with their intrinsic luminosities. By measuring the rotation speed of the galaxy and obtaining an estimate of its luminosity, you can use the Tully-Fisher relation to determine its distance. This method is particularly useful for distant galaxies where other distance measurement techniques, such as planetary nebulae or Cepheid variables, may not be as reliable.

Planetary nebulae and Cepheid variables are commonly used for distance measurements in other contexts, but for a galaxy estimated to be 150 million light-years away, the Tully-Fisher relation would be a more suitable method.

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It takes five time constants for the voltage to equal 1.0% of the initial value or the maximum value vmax when discharging a capacitor.

Given the voltage is equal to 1.0 % of the initial value or the maximum value vmax.

The number of time constants = τ

The time constant τ is defined as the time it takes for the capacitor voltage to reach 63.2% of the maximum voltage, vmax. This can be expressed as:  τ = RC where R is the resistance and C is the capacitance.

This can be calculated as follows:

\(v = vmax(e^{(-t/\tau)})\)

\(v = vmax(e^{(-t/RC)})\)

v = 0.01 * vmax

\(0.01 * vmax = vmax(e^{(-t/RC)})\)

\(0.01 = e^{(-t/RC)\)

\(10^{-2} = e^{(-t/RC)\)

\(-t/RC = ln(10^{-2})\)

\(t = -RC(4.6) = 5\tau\)

Therefore, it takes five time constants for the voltage to equal 1.0% of the initial value or the maximum value vmax.

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Answer:

Tectonic movement is the primary cause of earthquake.

The answer is that it is important to maintain a constant glide speed when executing an emergency approach to land in a single-engine airplane because variations in glide speed can nullify all attempts at accuracy in judgment of gliding distance and landing spot.



During an emergency approach to land, the pilot must ensure that the airplane descends at the proper angle to reach the desired landing spot. This angle is achieved by maintaining a constant glide speed. Any variations in glide speed can cause the airplane to either climb or descend, resulting in inaccurate judgment of the gliding distance and landing spot. This is why it is crucial to maintain a constant glide speed during an emergency approach to land.

It would also touch on the potential consequences of not maintaining a constant glide speed. For example, variations in glide speed can increase the chances of shock cooling the engine. Shock cooling refers to the rapid cooling of the engine cylinders caused by a sudden decrease in engine power. This can cause damage to the engine and reduce its overall lifespan.

In summary, maintaining a constant glide speed during an emergency approach to land is important for ensuring accuracy in judgment of gliding distance and landing spot, as well as preventing potential damage to the engine.

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It is obvious that In the pumped storage method, a pumped water is stored in a reservoir using unique pumps. Electric pumps consume electric power, however, and so the logic of the pumped storage methods seems poor but this is not so. Water is usually pumped during off-peak hours of power consumption. An essential reason for the pumped storage method is water-level control to make sure that the power station operates at all means or indefinitely. This reason reflects the economics of power generation as well.

what is hydroelectric system?

hydroelectric is a renewable energy also known as hydroelectric power,( hydropower), electricity that is produced from generators driven by turbines that convert the potential energy of falling or flowing water into mechanical energy.

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Answer:

It depends on the amount of pressure needed to cut the material.

Iron is a tougher material to cut though, so the blades must be shorter to create more pressure to break through the iron.

Cloth on the other hand is easier to cut through so the blades can be longer in order to cut more in each snip.

Explanation:

The momentum of the male African elephant is 47222.22 kg-m, and a filed mouse has to travel at the speed of 940681.7176 m /s, to have the same momentum.

The mass of the elephant, M1 = 6800 kg

The velocity of the elephant, v1 = 25 km/h or 25×5/18 = 6.94 m/s

The mass of the field mouse, M3 = 50.2 gm or 0.0502 kg

Let the speed of the mouse to have the same momentum is v2.

Momentum of the elephant = 6800 × 6.944 = 47222.22 kg-m

Momentum of elephant = momentum of mouse

6800 × 6.94 = 0.0502 × v2

v2 = (6800×6.94)/0.0502

v2 = 940681.7176 m/s

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Liguid hydrogen and liguid oxygen are the most common propellant used for a rocket spaceflight.

Propellant are chemical or substances that helps to produce thrust in rockets, missile and other engines. They can either be solid or liquid propellant both producing the same effect.

Liquid hydrogen is very efficient propellant and more common simple because it has a high specific impulse that generate the desired amount of thrust compared to other propellant.

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The rubbing process, electrons are transferred from the fur to the PVC rod, creating an electrical charge on the PVC rod.

This happens because when two materials are rubbed together, the surface of one material can attract electrons from the surface of the other material, resulting in one material becoming positively charged and the other becoming negatively charged. This is known as the triboelectric effect. Rubbing the PVC rod with fur causes it to become negatively charged because the fur has a higher affinity for electrons than the PVC.

This transfer of electrons is the best explanation for why rubbing a PVC rod with fur causes it to become electrically charged. When the fur and PVC rod are rubbed together, the fur loses electrons, making it positively charged, while the PVC rod gains electrons, making it negatively charged. This process is known as the triboelectric effect. The other explanations mentioned, such as rubbing energy or magnetic properties, are not accurate for this specific scenario.

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The closest probability value to the probability of the mean height being more than 67 inches is option d. 0.3694

To calculate the probability that the mean height of the 9 randomly selected students will be more than 67 inches, we can use the sampling distribution of the sample mean.

The mean of the sampling distribution of the sample mean is equal to the population mean, which is 66 inches in this case. The standard deviation of the sampling distribution (also known as the standard error) is calculated by dividing the population standard deviation by the square root of the sample size. In this case, the standard deviation is 3 inches and the sample size is 9.

The probability that the mean height of the 9 students will be more than 67 inches can be calculated by finding the area under the sampling distribution curve to the right of 67 inches. This can be done using a standard normal distribution table or a statistical calculator.

Based on the calculations, the closest probability value to the probability of the mean height being more than 67 inches is option d. 0.3694.

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The newtons of gravitational force downward does this child produce is (Z * 0.453592) * 9.81 Newtons.

To find the gravitational force downward produced by a child, you need to use the formula;

F = m * g

Where F is the gravitational force, m is the mass of the object, and g is the acceleration due to gravity (which is 9.81 m/s²).

The child weighs Z pounds, to find its mass, you'll need to convert pounds to kilograms.1 pound is equal to 0.453592 kilograms, so:mass = Z * 0.453592 kg The gravitational force produced by the child is therefore:

F = mass * g

Substituting mass and g into the formula:

F = (Z * 0.453592) * 9.81 Newtons

Hence, the newtons of gravitational force downward does this child produce is (Z * 0.453592) * 9.81 Newtons.

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Answer:

Following features are similar in longitudinal and transverse waves: Both waves are mechanical waves. Both transport energy without transporting matter. Particles oscillate about their mean position in both waves.

The owner should hire the extra worker if the wage rate is no greater than $300 per day.

To determine whether hiring an additional worker is financially beneficial, we need to compare the additional revenue generated from increased cherry yields to the cost of hiring the worker. Let's calculate:

Additional cherry yield per day with one extra worker = 20 bushels per day

Price per bushel = $15

Therefore, the additional revenue generated per day with one extra worker = 20 bushels/day * $15/bushel = $300/day.

Since the additional revenue per day from hiring one more worker is $300, the owner should hire the extra worker if the wage rate is no greater than $300 per day. This is because the additional revenue of $300 per day would cover the cost of the worker's wage.

The owner should consider hiring the extra worker if the wage rate is no greater than $300 per day. At this wage rate, the additional revenue generated from the increased cherry yields would be sufficient to cover the cost of hiring the worker. However, if the wage rate exceeds $300 per day, the additional cost of the worker's wage would outweigh the additional revenue, making it economically unfavorable to hire the extra worker.

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We only need to multiply 5V by the amount of current the device is drawing from the port because power is equal to current times voltage.

Although the USB port is only designed to handle electricity up to 5 A, certain manufacturers may offer a higher maximum current.

The potential difference in charge between two sites in an electrical field is quantified as voltage, also known as electromotive force.

The amount of charge carriers that pass a fixed point in a unit of time via a conducting or semiconducting medium for a certain flow resistance increases with voltage, i.e., the number of charge carriers that pass a fixed point in a unit of time.

Therefore, We only need to multiply 5V by the amount of current the device is drawing from the port because power is equal to current times voltage.

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An object of uniform density applies its gravitational force at its center of mass.

An object of uniform density applies its gravitational force at its center of mass. This is because the force of gravity is a result of the object's mass being concentrated at a single point, and the center of mass is the point where the object's mass is evenly distributed in all directions. Therefore, any object with uniform density will apply its gravitational force at its center of mass.

The centre of mass of an object with homogeneous density is where gravitational force acts. This is so because the centre of mass is where the object's mass is evenly distributed in all directions and the force of gravity results from the object's mass being concentrated at a single location. As a result, the centre of mass of any object with uniform density will experience gravitational pull.

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Answer:

James Prescott Joule

James Prescott Joule, (born December 24, 1818, Salford, Lancashire [now in Greater Manchester], England—died October 11, 1889, Sale, Cheshire), English physicist who established that the various forms of energy—mechanical, electrical, and heat—are basically the same and can be changed one into another.James Prescott Joule experimented with engines, electricity and heat throughout his life. Joule's findings resulted in his development of the mechanical theory of heat and Joule's law, which quantitatively describes the rate at which heat energy is produced from electric energy by the resistance in a circuit.

Answer:

The student can experiment by timing the speed and changing the angle of the ramp for many number of trials.

Explanation:

In order to  find the final velocity (vf) of a particle given its initial velocity (vi), acceleration (a), and time (t), you can use the following equation

After calculating for  vf, you can find the final displacement (xf) using the following equation :

In mathematics, an equation is a formula that expresses the equality of two expressions, by connecting them with the equals sign

In the above equation, 0.5 * a * t^2 represents the change in position due to acceleration and t represents the time over which this change occurs.

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