the kinetic friction force exerted on an object: the kinetic friction force exerted on an object: can vary between zero to a maximum value. is inversely proportional to the normal force exerted on the object. is independent of the speed of the object. is proportional to the normal force exerted on the object. always has a direction opposite to the direction of motion.

Answer:

Toaster

Explanation:

A toaster draws electric current (electrical energy) from a wall outlet and converts these moving electric charges into heat (thermal energy) in the filaments that turn red hot to cook your toast. ... As electricity runs through the filaments in a space heater, the electrical energy is converted into heat (thermal energy).

Answer:

The answer is . A 46.2g

Answer:

The reading of the Geiger counter, 22 minutes later = 29 counts per minute (cpm)

Explanation:

Half life is defined as the time taken for the amount ( or activity) of a substance to reduce to half its original value.

As stated in the question, the half life of Francium-233 is 22 minutes, \(t_{1/2} = 22 minutes\). This means that it takes 22 minutes for the activity of Francium-233 to reduce to half of its original value.

The original activity of Francium-233 =  58 counts per minute (cpm)

By the end of 22 minutes, the activity measured by the counter would have halved.

Activity of Francium-233 after 22 minutes = 58/2

Activity of Francium-233 after 22 minutes = 29 counts per minute (cpm)

Acceleration can be determined by Newtons second law

\(\\ \rm\rightarrowtail F=ma\)

Where

Answer:

lever: Principle of the Lever

lever: Principle of the LeverIt has been found by experiment that two equal forces acting in opposite directions, i.e., clockwise and counterclockwise, and applied to a uniform lever at equal distances from the fulcrum counteract each other and establish a state of equilibrium, or balance, in the lever.

Explanation:

a = f/m

a = 230/24 = 9.58m/s²

t = 25secs

u = 0m/s

v = ?

a = (v - u)/t

9.58 = (v - 0)/25

9.58 x 25 = v

v = 238.75m/s

The hydrogen atom will have 5 values for the azimuthal quantum number, l.

i) A group of quantum states of the hydrogen atom has the principal quantum number as,

n = 5.

Therefore, the possible values of the azimuthal quantum number of the hydrogen atom, l will be,

l = 0, 1 ,2, ..., (n - 1) = 0, 1, 2, ..., (5 - 1) values

l = 0, 1, 2, 3, 4

So, the hydrogen atom will have 5 values for the azimuthal quantum number.

ii) Given that,

The principal quantum number of hydrogen atom, n = 5

Azimuthal quantum number of the hydrogen atom, l = 3

Therefore, the possible values of magnetic quantum number, m will be,

m = -l, ..., 0, ...+l

m = -3, -2, -1, 0, 1, 2, 3

So, the hydrogen atom will have 7 values for the magnetic quantum number.

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Answer: The mass on Moon will be 98. 1 kg.

Explanation:

As per the known fact, the mass is independent of acceleration due to gravity of planet.

The critical speed below which the rope would become slack when the bucket reaches the highest point in the circle is determined by the length of the rope and the radius of the circle.

When the bucket is at the highest point in the circle, it is momentarily at rest and the tension in the rope must be zero.

The formula for calculating the critical speed at which the rope becomes slack is:

v = √(gr)

where v is the critical speed, g is the acceleration due to gravity, and r is the radius of the circle.

For example, if the radius of the circle is 2 meters and the acceleration due to gravity is 9.8 m/s², the critical speed would be:

v = √(9.8 × 2) = 4.4 m/s

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Answer:

kinetic and I think sound energy

Answer:

kinetic energy

Explanation:

An apple falling to the ground has both potential energy and kinetic energy. As the apple falls, its potential energy is converted into kinetic energy, which is the energy an object has due to its motion. The apple gains kinetic energy as it falls and its velocity increases, and at the moment it reaches the ground, all of its potential energy has been converted into kinetic energy.


ALLEN

Answer:

7.2375m/s^2

Explanation:

initial velocity=-25 km/h=-6.94m/s

final velocity=35 km/h=9.72m.s

distance=3.2m

v^2=u^2+2as

9.72^2=-6.94^2+2a*3.2

94.48=48.16+6.4a

(94.48-48.16)/6.4=a

7.2375m/s^2

Therefore, the resistivity of the material is 0.93 x 10^-3 Ω cm.  However, for the given values, we can assume that the increase in mobility dominates, and therefore, the conductivity would increase with temperature.

(A) To calculate the conductivity σ of the material, we can use the formula:

σ = q(nμn + pμp)

where q is the electronic charge and p is the hole concentration, which can be calculated as p = ni^2/nd, where ni is the intrinsic carrier concentration of silicon at room temperature (300 K), which is approximately 1.5 x 10^10 cm^-3.

Substituting the given values, we get:

p = (1.5 x 10^10)^2/10^15 = 225 cm^-3

σ = 1.6 x 10^-19 x (1015 x 1300 + 225 x 450) = 1.07 x 10^3 (Ω cm)^-1

(B) The resistivity of the material can be calculated using the formula:

ρ = 1/σ

Substituting the value of σ, we get:

ρ = 1/1.07 x 10^3 = 0.93 x 10^-3 Ω cm

(C) If the temperature is increased to 350 K, we would expect σ to increase. This is because the mobility of both electrons and holes increases with temperature, which means that the material becomes more conductive as the temperature increases. However, the intrinsic carrier concentration also increases with temperature, which means that the number of free charge carriers also increases. The net effect on the conductivity depends on the relative increase in mobility and carrier concentration, and can be calculated using more detailed models of carrier transport.

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Answer:

W = 15,000 Joule

Explanation:

Mechanical Work

Mechanical work is the amount of energy transferred by a force. It's a scalar quantity, with SI units of joules.

If both the force and displacement are parallel, then we can use the scalar formula:

W=F.s

Where

F =Magnitude of the force

s = magnitude of the displacement

The tornado moved a trailer with a force of F=600 N for a distance of s=25 m. The work done was:

W = 600 N * 25 m

W = 15,000 Joule

Explanation: Well, If you arrive in my class 45 seconds after leaving math, which is 90 meters away. you traveled 2m/s ( I hope this helped <3)

The net displacement can be calculated by summing the three vectors.

15m, \(135^{0}\) have x = -7.5m and y = 7.5m

35m, \(40^{0}\) NW have x = -26,8m and y = 22.5m

20m, \(15^{0}\) NE have x = 19.3m and y = 5.2m

The the net displacement is x = -15m and y = 35.2m or 38.26m, \(23.07^{0}\) NW

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An archeologist is exploring a cave; she follows a secret passage 15 m, 135°, then 35 m, 40° NW. Finally, 20 m, 15° NE. The net displacement -15m and y = 35.2m or 38.26m,  NW.

The net displacement can be calculated by summing the three vectors.

15m,  have x = -7.5m and y = 7.5m

35m,  NW have x = -26,8m and y = 22.5m

20m,  NE have x = 19.3m and y = 5.2m

The the net displacement is x = -15m and y = 35.2m or 38.26m,  NW

Displacement vectors have a length or magnitude equal to the shortest distance between a start point and an end point. Adding vectors to get a net displacement requires separating them by dimensions, and . And displacement vectors, like all vectors, have both a magnitude, or length, and a direction.

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Tech A's statement is incorrect. When turning a corner, the wheels being steered do not remain parallel to each other.

In a typical vehicle, the wheels on the same axle turn at different angles to facilitate the turning motion. During a turn, the inside wheel (the one closer to the center of the turn) follows a tighter radius compared to the outside wheel. This difference in turning radius causes the wheels to steer at different angles. The outside wheel is steered at a larger angle than the inside wheel, allowing the vehicle to negotiate the turn smoothly.

This differential steering is achieved through various mechanisms like the steering rack, tie rods, and steering knuckles. The differential steering angle ensures that the vehicle can follow the desired trajectory during cornering, maintaining stability and maneuverability.

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Your question is incomplete but your full question was,

Tech A says that when turning a corner, both wheels being steered remain parallel to each other as the wheels are steered. Tech B says that on some vehicles, the rear wheels also can be steered. Who is correct?

Answer:

C.)water

Explanation:

Weathering is the physical disintegration and chemical decomposition of rocks to form sediments and soils.

Mechanical weathering is the breaking down of rocks by physical means.

Chemical weathering is the decay of rocks by chemical means.

Answer:

b decreases as a increases and c stays constant

It all depends on the definitions of a, b, and c, and the relationship among them. Your question doesn't give us any of this information.

Answer:

b.it depends on the distance it falls

Waves share common characteristics such as wave motion, amplitude, wavelength, frequency, wave speed, and interactions with boundaries. These properties are fundamental to understanding the behavior and properties of various types of waves, including sound waves, electromagnetic waves, water waves, and seismic waves.

A characteristic of all waves is their ability to transfer energy without transferring matter. This fundamental property distinguishes waves from other forms of energy transfer, such as the movement of objects in a solid or the flow of fluids. Waves propagate through various mediums or through empty space, carrying energy from one location to another.

Waves exhibit several common characteristics, including:

1. Wave Motion: Waves involve the transfer of energy through periodic oscillations or vibrations. The particles or fields involved in the wave motion move back and forth around their equilibrium positions, transmitting the energy along the wave path.

2. Amplitude: The amplitude of a wave represents the maximum displacement or disturbance from the equilibrium position. It corresponds to the intensity or strength of the wave and can be measured as the maximum height, displacement, or value of a wave.

3. Wavelength: The wavelength of a wave is the distance between two consecutive points with the same phase or the distance covered by one complete cycle of the wave. It is commonly represented by the symbol λ and is usually measured in meters or other appropriate units.

4. Frequency: The frequency of a wave refers to the number of complete oscillations or cycles that occur per unit of time. It is denoted by the symbol f and is measured in hertz (Hz). The frequency and wavelength of a wave are inversely related and are related to the speed of the wave through the equation v = fλ, where v represents the wave velocity.

5. Wave Speed: The wave speed represents the rate at which a wave travels through a medium or through empty space. It is the product of the wavelength and the frequency of the wave and is usually denoted by the symbol v. The speed of a wave depends on the properties of the medium through which it travels.

6. Reflection, Refraction, and Diffraction: Waves can undergo interactions with boundaries or obstacles, resulting in phenomena such as reflection (bouncing off a surface), refraction (bending when passing through different mediums), and diffraction (spreading out or bending around obstacles).

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Answer:

no i haven't. i will

Explanation:

Answer:

C. photons

hope this helps

have a good day :)

Explanation:

Answer:

The answer would be c

Explanation:

Answer:

Chemical energy is energy stored in the bonds of atoms and molecules. ...

Mechanical energy is energy stored in objects by tension. ...

Nuclear energy is energy stored in the nucleus of an atom—the energy that holds the nucleus together. ...

Gravitational energy is energy stored in an object's height.

Answer:

Nuclear power

Electricity

Mechanic

Gravity

Explanation:

No, not all waves move through various materials at the same pace. The characteristics of the medium itself, the kind of wave, and the frequency of the wave are only a few of the variables.

that affect how quickly a wave moves through a given medium. Sound waves, for instance, go through various materials at varying rates, depending on the density and elasticity of the medium. In general, solids transmit sound more quickly than liquids or gases do. Similar to how sound waves go through various materials at various rates, depending on the refractive index of the medium. Light waves, for example, constantly travel in a vacuum at a constant speed of around 299,792,458 meters per second (or about 186,282 miles per second). Nevertheless, as they go on.

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Answer:

The benefits of the improved chulha is to reduce fuel consumption leading to saving in fuel wood. It reduces the smoke so the women can save time & saving in time leading to more economic activity, employment generation, etc.

Explanation:

The benefits of the improved chulha is to reduce fuel consumption leading to saving in fuel wood. It reduces the smoke so the women can save time & saving in time leading to more economic activity, employment generation, etc.

Hi there!

We can use Faraday's Law to solve:

\(\epsilon = N\frac{d\Phi _B}{dt}\)

ε = Induced emf (? V)

N = Number of loops (1 loop)

ΦB = Magnetic flux (Wb)

We know that:

\(\Phi_B = \oint B \cdot dA = B\cdot A\)

Since the area of the loop remains the same, we can take this out of the time derivative.

We get:
\(\frac{d\Phi_B}{dt} = A * \frac{dB}{dt}\)

Also, since N = 1, we can now rewrite the equation for the induced emf as:
\(\epsilon = A * \frac{dB}{dt}\)

dB/dt is equivalent to the change in the magnetic field with respect to time:
\(\Delta B = \frac{B_f - B_i}{\Delta t}\\\\\Delta B = \frac{3 - 2}{5} = 0.2 \frac{T}{s}\)

Now, substitute this value into the equation for induced emf:
\(\epsilon = \pi (0.3^2) * (0.2) = \boxed{0.0565 V}\)

**Also, since the magnetic field INCREASED out of the page, this change in magnetic flux will create an induced CLOCKWISE current that produces a magnetic field into the page in order to oppose the increase in magnetic flux OUT of the page.