An electron moves in a circular path perpendicular to a uniform magnetic field with a magnitude of 2.00 mT (milli-Tesla). If the speed of the electron is 1.50 x 10^7 m/s, what is the radius of the circular path?

Answer:

b.positive and decreasing in magnitude.

Explanation:

The kinematics of a body can be calculated by means of the following expression.

\(v_{f}=v_{o}-g*t\)

where:

vf = final velocity [m/s]

vo = initial velocity = 40 [m/s]

g = gravity acceleration = 9.81 [m/s²]

t = time [s]

As we can see from the above equation, the final velocity of a body decreases its initial velocity as time increases. That is, as the body rises, the velocity decreases.

Answer:

Power = 2 j/s

Explanation:

Power = Work / Time

= 20/10

= 2 j/s

When a coin lies submerged at the bottom of a pan of water, refraction of light from the coin make it appears shallower than it really is.

Refraction is defined as "the change in a wave's direction as it passes through a medium."

Although light refraction is one of the most frequently seen phenomena, refraction can also occur with sound and water waves.

Due to the fact that light rays emerging from water will immediately turn towards the water's surface. They don't move straight ahead. (Glass experiences the same phenomenon; this is how lenses are produced.)

The bottom of the pan's light beams arc in the direction of the water's surface. As a result, the ray appears to have come from a higher location to you. So it appears to be shallower.

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To find the elongation of the spring, we can use Hooke's Law, which states that the force exerted by a spring is proportional to its elongation. The formula for Hooke's law is:

F = -kx

where F is the force, k is the spring constant, and x is the elongation.

In this case, the force is equal to the weight of the object (10 kg), which can be calculated as:

F = m * g

where m is the mass of the object (10 kg) and g is the acceleration due to gravity (9.8 m/s^2).

So, the force can be calculated as:

F = 10 kg * 9.8 m/s^2 = 98 N

Using Hooke's law, we can find the elongation of the spring:

F = -kx

98 N = -250 N/m * x

x = 98 N / 250 N/m = 0.392 m

So, the elongation of the spring is 0.392 m.

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Hey brother, no problem for the answer but could you give 5 stars and a thanks!

All love, Johnny Sins :)

Answer:

A force of 355 N is applied to an object that accelerates at a rate of 7.8 m/sec2 . What is the mass of the object ?

Explanation:

The solubility of lead nitrate is 52 grams per 100 milliliters of water at 0°C. Since the question does not specify the temperature, we will assume it is 0°C.To calculate the number of millimeters of water required to dissolve 5 g of lead nitrate,

we must first calculate the number of milliliters of water required to dissolve 5 g of lead nitrate.52 grams of lead nitrate can dissolve in 100 milliliters of water. So,5 g of lead nitrate can dissolve in x milliliters of water.= (5 g / 52 g) × 100 mL= 9.6 mLTherefore, 5 g of lead nitrate can dissolve in 9.6 mL of water. However, the question is asking for the number of millimeters of water, not milliliters. Since 1 milliliter of water weighs 1 gram,9.6 milliliters of water will weigh 9.6 grams.Thus, 5 g of lead nitrate can dissolve in 9.6 millimeters of water.

main answer:5 g of lead nitrate can dissolve in 9.6 millimeters of water. :52 grams of lead nitrate can dissolve in 100 milliliters of water. So, 5 g of lead nitrate can dissolve in x milliliters of water.= (5 g / 52 g) × 100 mL= 9.6 mLTherefore, 5 g of lead nitrate can dissolve in 9.6 mL of water. However, the question is asking for the number of millimeters of water, not milliliters. Since 1 milliliter of water weighs 1 gram,9.6 milliliters of water will weigh 9.6 grams.Thus, 5 g of lead nitrate can dissolve in 9.6 millimeters of water.

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Answer:

The amount of force will increase

Explanation:

The conservation of energy law similarly holds that energy cannot be created or destroyed.

That's what the fundamental law of thermodynamics says. It is only possible to change the form of energy; it cannot be created or destroyed. This is sometimes known as the rule of energy conversion or perhaps the law of energy conservation.

The two aforementioned principles were unified into one when Albert Einstein published the formula E= mc2 at the start of the 20th century, resulting in the formation of the Conservation Law of Mass-Energy, which asserts that the total quantity of both mass and energy in the universe remains constant.

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The constant acceleration required to increase the speed of the car from 24 mi/h to 56 mi/h in 5 seconds is 9.78 ft/s^2 (rounded to two decimal places).

To convert 24 mi/h to ft/s, we multiply by 1.46667 (since 1 mile = 5280 feet and 1 hour = 3600 seconds):
24 mi/h * 1.46667 = 35.2 ft/s

To convert 56 mi/h to ft/s, we do the same:
56 mi/h * 1.46667 = 84.1 ft/s

The change in velocity is:
84.1 ft/s - 35.2 ft/s = 48.9 ft/s

The time is given as 5 seconds.

The constant acceleration required can be found using the formula:
acceleration = change in velocity / time

acceleration = 48.9 ft/s / 5 s
acceleration = 9.78 ft/s^2

Therefore, the constant acceleration required to increase the speed of the car from 24 mi/h to 56 mi/h in 5 seconds is 9.78 ft/s^2 (rounded to two decimal places).

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The refracting telescope uses large lenses. The larger lenses increase the weight of the telescope. The weight of the refracting telescopes makes it difficult for the observer to keep them aligned.

Thus the correct answer is option b, refracting telescopes.

Answer:

Is Reflecting telescope

Explanation:

I took the test

Answer:

If they both start at the same height then most likely that means that each has an intical velocity  and a net force sooooo ball A 19.6

Explanation:

Answer: The mass of ball C is greater than the mass of ball A but less than the mass of ball B.

Answer:

Isaac Newton and John Locke were significant pieces in the enlightenment by applying scientific notions and giving individuals the courage to break away from government. Isaac Newton came up with the scientific study that the universe was subjugated by the force to gravity, distance, and mass.

Isaac Newton's revolutionary achievements in mathematics, physics, and astronomy made a vital contribution to the Enlightenment. English mathematician, physicist, astronomer, alchemist, theologian, and author Sir Isaac Newton PRS.

Our knowledge of the natural world and the operations of the cosmos has been fundamentally altered by his laws of motion and universal gravitation. Modern physics was founded on Isaac Newton's Mathematical Principles of Natural Philosophy and Optics, which also contributed to the development of the scientific method as a technique of learning new things. His work contributed to the replacement of the static, earth-centered Aristotelian view of the cosmos with a dynamic, universe-centered one that was guided by natural laws and mathematical concepts. The focus on reason, evidence, and scientific investigation during the Enlightenment helped establish the groundwork for contemporary science, and Newton's theories and findings were a vital contributor to this movement.

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Answer:

Covalent bond

Electrovalent bond

Explanation:

In covalent bond element share electrons

In electrovalent bond element donate electrons

Answer:

Option A nuclear

Explanation:

The rate of electricity production in nuclear power plant is much higher as compared to the rate of electricity generation in gas, wind and solar power plants.

Thus, in case where large amount of electricity is to be produced in a short period then one must rely on nuclear power plants.

Therefore, option A is correct

Answer: Option A- Nuclear power station

Explanation: During a sudden increase in demand, Nuclear power stations can be used easily to supply the needed energy as they have an extremely short start up time. This means that the energy can be supplied in a short period of time.

The emf power supply should be used for a 0.75 A recharging current is 2.25 V.

The current is the stream of charges which flow inside the conductors when connected across the end of voltage.

Given is the battery having 1.5 V open circuit potential and internal resistance of 1 ohm.

From the Ohm's law, V =IR

R = V/I

Here, R is the proportionality constant.

To charge current I = 0.75 A

Voltage V = 0.75A x 1 ohm = 0.75 V

Total potential required is

= 1.5 +0.75

= 2.25 V

Thus, the emf power supply should be used for a 0.75 A recharging current  is 2.25V.

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Answer:

Matter is transferred great distances during conduction. (t think i'm not truly sure)

Explanation:

The direct transfer of energy from one molecule to another is known as conduction. Conduction occurs in solids, liquids, and gases, but it is most effective in solids. Heat transfer by radiation, unlike conduction or convection, does not require any matter.

hope this helps

According to the concept of conduction,matter is transferred great distances during conduction.

Conduction is defined as a process as a means of which heat is transferred from the hotter end of the body to it's cooler end.Heat flows spontaneously from a body which is hot to a body which is cold.

In the process of conduction,heat flow is within the body and through itself.In solids the conduction of heat is due to the vibrations and collisions of molecules while in liquids and gases it is due to the random motion of the molecules .

When conduction takes place, heat is usually transferred from one molecule to another as they are in direct contact with each other.There are 2 types of conduction:1) steady state conduction 2) transient conduction.According to the type of energy conduction is of three types:

1) heat conduction

2) electrical conduction

3)sound conduction

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Answer:

B. 2 litros.

Explanation:

De acuerdo con el enunciado, el gas experimenta un proceso isotérmico y se conserva su masa. Asumiendo que el gas se comporta idealmente, tenemos la siguiente relación entre los estados final e inicial:

\(P_{1}\cdot V_{1} = P_{2}\cdot V_{2}\) (1)

Donde:

\(P_{1}, P_{2}\) - Presiones inicial y final, medidos en atmósferas.

\(V_{1}, V_{2}\) - Volúmenes inicial y final, medidos en litros.

Si sabemos que \(P_{1} = 10\,atm\), \(P_{2} = 1\,atm\) y \(V_{2} = 20\,L\), entonces el volumen inicial del gas es:

\(V_{1} = \frac{P_{2}\cdot V_{2}}{P_{1}}\)

\(V_{1} = 2\,L\)

Por lo tanto, la respuesta correcta es B.

"Planting more trees brings rain because plants transpire" is the piece of evidence from the page that support the idea that forest promote rainfall.

Water is moved through a plant during transpiration, and it is evaporated from aerial parts of the plant, such as leaves, stems, and flowers. Even though plants need water to survive, only a small portion of the water absorbed by their roots is actually utilised for cellular growth and metabolism.

Transpiration and guttation cause the remaining 97-99.5% to be lost. In most plants, the undersides of the foliage have more of the tiny pores known as stomata that decorate the surface of leaves.

The guard cells that surround the stomata are responsible for opening and closing the pore, as are their stomatal accessory cells. Transpiration occurs through the stomatal apertures and is regarded as a "cost" of the stomata opening, which allows the diffusion of carbon dioxide gas from the atmosphere for photosynthesis.

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Answer:

d. Can be replaced at the same rate or faster than they are used

Explanation:

I just took the test, and its the right answer. Your welcome ✌

1. The limit of proportionality for the extension-load graph of a spring is the maximum point on the graph up to which Hooke's Law is obeyed.

(2a) The total length of the stretched spring when a stretching force of 2 N is applied is approximately 100.1112 mm.

(3) Spring A is stronger because it has greater spring constant.

The extension of the spring can be calculated using the following formula:

Extension = Total length of the stretched spring - Unstretched length of the spring

Extension = 118 mm - 100 mm = 18 mm

To calculate the total length of the spring when a stretching force of 2 N is applied, we first need to determine the spring constant (k) using the given information.

k = (Force applied) / (Extension)

k = 1 N / 18 mm

k = 0.0556 N/mm

Now, we can use the following formula to calculate the total length of the stretched spring:

Total length of the stretched spring = Unstretched length of the spring + Extension due to the applied force

Total length of the stretched spring = 100 mm + (k x Force applied)

Total length of the stretched spring = 100 mm + (0.0556 N/mm x 2 N)

Total length of the stretched spring = 100 mm + 0.1112 mm

Total length of the stretched spring = 100.1112 mm

To determine which spring is stronger, we need to compare their spring constants. The spring constant (k) is a measure of the stiffness of a spring and is defined as the force required to produce a unit extension in the spring. It is usually measured in units of N/m or N/mm.

For spring A, the extension is 15 mm/N, which means that the spring constant is:

k(A) = 1 / 15 N/mm = 0.067 N/mm

For spring B, the extension is 20 mm/N, which means that the spring constant is:

k(B) = 1 / 20 N/mm = 0.05 N/mm

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The physical method of controlling microbial growth that applies pressure to water to create steam is called "autoclaving" or "sterilization by autoclave."

Autoclaving is a widely used method for sterilization in various industries, including healthcare, laboratories, and food processing. It involves subjecting materials or objects to high-pressure saturated steam at elevated temperatures. The combination of pressure and heat effectively kills microorganisms, including bacteria, viruses, fungi, and spores.

Autoclaves consist of a sealed chamber that can withstand high pressures, along with a source of heat and a means to generate steam. The process involves placing the items to be sterilized inside the autoclave chamber and then raising the temperature and pressure to the desired levels. The high-pressure steam penetrates the materials and destroys the microorganisms present, ensuring effective sterilization.

The typical conditions for autoclaving include temperatures ranging from 121 to 134 degrees Celsius (250 to 273 degrees Fahrenheit) and pressures between 15 and 30 pounds per square inch (psi). These conditions are maintained for a specified period, usually around 15 to 30 minutes, depending on the size and nature of the items being sterilized.

Autoclaving is advantageous because it provides a reliable and efficient method for achieving sterility. It can be used to sterilize a wide range of materials, including laboratory glassware, surgical instruments, medical equipment, media and solutions, textiles, and more. The high temperatures and pressure ensure thorough sterilization, and the process is relatively quick compared to other methods.

However, it is important to note that not all materials can be autoclaved, as some may be sensitive to heat or moisture. Additionally, certain biological substances, such as certain types of infectious waste or toxins, may require specialized treatment beyond autoclaving.

Overall, autoclaving is a highly effective method for controlling microbial growth by applying pressure to water to create steam. Its widespread use in various industries is a testament to its reliability and efficiency in achieving sterilization.

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(a,i) Force acting in opposite direction; (a,ii) The tension force acting in the direction of rope. (b) Normal force, Tension force, Friction force, Force of gravity. (c,1) friction = us*N; (c,2) Force = 0.

(a) 1. For the force pointing along the ramp:

The force of gravity acting downwards (mg)

The normal force acting upwards (N)

The force of static friction acting in the opposite direction of the motion (friction)

(a) 2. For the forces pointing perpendicular to the ramp:

The force of gravity acting downwards (mg)

The normal force acting upwards (N)

The tension force acting in the direction of the rope (T)

b) Largest to smallest:

1. Normal force

2. Tension force

3. Friction force

4. Force of gravity

c) 1. For forces pointing along the ramp: f = friction = us * N

2. For forces pointing perpendicular to the ramp: T - mgsin(30) = ma = 0

The force of gravity appears in both equations and the tension force only appears in the equation for forces pointing perpendicular to the ramp. It is important to note that the force of friction is always pointing opposite to the direction of motion, the force of gravity is always pointing downwards and the normal force is always perpendicular to the surface.

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The formula for calculating the orbital speed of the eqrth as it orbits the sun is expressed as

Where

G is the gravitational constant whose value is 6.673 x 10^- 11 Nm^2/kg^2

M is the mass of the central body about which the satelite orbits

R is the ardius of orbit of the satelite

From the information given,

M = 1.99 x 10^30 kg

R = 1.496 x 10^11

By substituting these values into the formula, we have

The orbital speed of the Earth, in m/s, as it orbits the Sun is 29793.48 m/s

Answer:

Option A. An atom of cobalt contains more neutrons than protons.

Explanation:

From the question given above, the following data were obtained:

Mass number = 59

Atomic number = 27

Next, we shall determine the number of protons in the atom. This is illustrated below:

Atomic number of an element is simply defined as the number of protons in the atom of the element. Thus,

Atomic number = proton number

Atomic number = 27

Therefore,

Proton number = 27

Next, we shall determine the neutron number. This can be obtained as follow:

Mass number = 59

Proton number = 27

Neutron number =?

Mass number = Proton + Neutron

59 = 27 + Neutron

Collect like terms

Neutron = 59 – 27

Neutron number = 32

Next, we shall determine the number of electrons. This can be obtained as follow:

Since the atom is neutral i.e it has no charge, then, the number of protons and electrons are equal. Thus,

Electron number = Proton number

Proton number = 27

Therefore,

Electron number = 27

Summary:

Mass number = 59

Atomic number = 27

Proton number = 27

Neutron number = 32

Electron number = 27

From the above, we can see that the atom of cobalt contains:

1. More neutrons than protons.

2. The same number of protons and electrons.

Therefore, option A gives the correct answer to the question.

The object that has potential energy is the can of gasoline.

Potential energy is described as the energy held by an object because of its position relative to other objects, stresses within itself, its electric charge, or other factors.

The forms of potential energy includes:

Potential energy is described as the energy a system has due to position, shape, or configuration.

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The probability density function of X is plotted for a=1/2 and a=2.

The expected value of X (E[X]) is determined.

The expected value of 1/X (E[1/X]) is determined.

The variance of X (V[X]) is determined.

The median of X is determined.

When a=1/2, the probability density function of X is given by p(X=x∣a)=((1/2)+1)x(1/2)^0=(3/2)x for x∈[0,1]. When a=2, the probability density function becomes p(X=x∣a)=(2+1)x^2=3x^2 for x∈[0,1]. To plot the probability density function, we can assign different values of x within the range [0,1], calculate the corresponding probabilities using the given formulas, and plot the points on a graph.

The expected value of X (E[X]) is calculated by integrating the product of X and its probability density function over the range [0,1]. For a=1/2, E[X] = ∫(x * (3/2)x) dx from 0 to 1. For a=2, E[X] = ∫(x * 3x^2) dx from 0 to 1. By evaluating these integrals, we can determine the expected values.

The expected value of 1/X (E[1/X]) is calculated similarly to E[X], but instead of integrating X, we integrate 1/X using the respective probability density functions for different values of a.

The variance of X (V[X]) can be computed by taking the second moment of X (E[X^2]) minus the square of the first moment (E[X]) squared. V[X] = E[X^2] - (E[X])^2. By calculating E[X^2] using the probability density function and the expected values obtained in step 2, we can determine the variances for different values of a.

The median of X is the value of X such that the cumulative distribution function (CDF) is equal to 0.5. To find the median, we integrate the probability density function from 0 to the median value and set it equal to 0.5. Solving for the median provides its value in terms of the parameter a.

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Answer:

Below

Explanation:

The two PARALLEL resistors equal:    1 / (1/16 + 1/16) = 8 Ω

V = IR        =    .7 (8) = 5.6 v