A capacitor is charged with an initial voltage of 10Volts. The voltage on the capacitor discharges in an exponentially decaying fashion described by , where the time constant is given by 68. How long will it take for the voltage on the capacitor to reach 49% of its initial value. Provide your answer in units of micro-seconds ()

Explanation:

i think it will be on the ground

Answer:

b:50

Explanation:

90+40=130-180=50

Answer:

B

Explanation:

I got it correct on the Unit test!!!! :)

u w u

Answer:

0.4m/s

Explanation:

\(F = ma\) where F= force, m= mass, and a=acceleration

we also know that,

a = Δv / t where Δv = change in velocity and t = time

thus F = m ( Δv / t)

\(2000=50(\frac{v}{0.01})\)

\(\frac{2000}{5000} = v\)

0.4m/s = Δv

The following information is provided in the problem: A sled with a weight of 19.7 kg is pulled with a force of 42.0 N at an angle of 43.0° across ground where μ₁ = 0.130. We need to find out the normal force that is exerted on the sled.

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Answer:

60N

Explanation:

According to the principle of lever: a torque can control if an object will spin or not.

The torque Iskander cause is 40*1.2=48 N-m

So for balanced, Danny should cause the same torque.

48/0.8=60, Danny weigh 60N.

The current flowing in the 2.00 mm diameter segment of the wire is 2.56L × 10⁻² A and the electron drift speed in the 2.00 mm diameter segment of the wire is 0.028 m/s.

Electric Current: The movement of electrons constitutes an electric current. It is measured in amperes (A).

Electron Drift Speed: When an electric field is applied to a metal wire, the electrons within the wire move in response to the field.

The average speed of electrons in the metal wire is known as electron drift speed. It is given by = I / (nAq),

Where, n is the number of electrons per unit volume of the conductor,

A is the cross-sectional area of the conductor, and

q is the charge on an electron.

Given data shows that both wires are made of the same material so the material properties (number density of electrons, atomic properties) are constant for both wires.

Hence, the electron drift speed in both wires would be the same. Let’s say the current flowing in both wires is I1 and I2 respectively and the diameter of the wire is 2.00mm or radius R = 1.00mm.

According to Ohm’s Law = the resistance of the wire can be expressed as R = ρL / A

where ρ is the resistivity of the wire,

L is the length of the wire, and

A is the cross-sectional area of the wire.

The cross-sectional area of the wire can be written as = πR²

Now combining both equations of resistance and the cross-sectional area we get,

R = ρL / πR²Now, I = V / R

So, I = V πR² / ρL

The current density can be written as J = I / A = V πR² / ρL πR²

Now we can express V as J ρL = I

Substitute the given values,

Current density J = 3.00 × 10⁶ A/m²ρ = 2.70 × 10⁻⁸ Ωm

Diameter of wire = 2.00mm

Therefore, the radius of wire = R = 1.00 mm = 1.00 × 10⁻³ m

Using the given formula, I = J πR²ρLSo, I = 3.00 × 10⁶ × π × (1.00 × 10⁻³)² × 2.70 × 10⁻⁸ × L = 2.56 L × 10⁻² A

The electron drift speed can be written as, v = I / (nAq)

Let’s say the number of electrons per unit volume of the conductor is n, the electron charge be q and

the length of the wire be L.

Then, L × πR² × nq = where m is the mass of the conductor.

L × πR² × nq = ρV

Where ρ is the density of the conductor and

V is the volume of the conductor.

So, V = πR²Lρ And, L × πR² × nq = ρπR²L

Therefore, nq = ρ

The electron drift velocity is given as,v = I / (nAq)So, v = I / (n × πR² × q)

The number density of electrons n can be expressed as = N / V

Where N is the total number of electrons in the conductor.

Substituting the given values,

Number density n = 8.49 × 10²⁸ / (π(1.00 × 10⁻³)² × L × 2.70 × 10⁻⁸)

Current I = 2.56L × 10⁻² A

Electron charge q = 1.6 × 10⁻¹⁹ C

Cross-sectional area A = πR²

Where radius R = 1.00mm or R = 1.00 × 10⁻³ m.

Now substituting the above values

we get, v = 2.56L × 10⁻² / (8.49 × 10²⁸ / (π(1.00 × 10⁻³)² × L × 2.70 × 10⁻⁸) × π(1.00 × 10⁻³)² × 1.6 × 10⁻¹⁹)

Hence the electron drift speed can be calculated as v = 0.028 m/s.

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All of these methods can be useful in identifying a faulty component in a circuit, and which one to use depends on the specific situation and the experience of the troubleshooter.

When a circuit component fails, it can cause the entire circuit to malfunction. Troubleshooting a circuit requires identifying the problematic component so that it can be replaced or repaired. There are different methods to determine which component is not working properly, including voltage testing, ohm amp draw, and hopscotching.

Voltage testing involves measuring the voltage at various points in the circuit to identify where the voltage drop occurs, which can indicate a faulty component.

Ohm amp draw involves measuring the resistance and current flow through each component to determine if any are outside of their expected range.

Hopscotching involves checking each component in the circuit one by one, starting from the power source, to see which one is causing the problem.

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Answer:

a in high frequency waves

Explanation:

because of the thermal radiation from the sun

Answer:

The answer is B, "In low frequency-waves"

Explanation:

I got this right on my lesson! Have a great day! (-;

It is to be noted that the system cannot be put in equilibrium by a 0.050kg mass. This is because the point on the stick where it ought to be placed is longer than the actual length of the stick.

In physics, equilibrium is the state of a system where neither its state of momentum nor its internal energy state changes over time. In a meter-stick experiment, the net torque applied to the system must be zero for the system to be in equilibrium.

Assume the center of gravity is at 0.500 m.

Recall that m1 = 0.200kg at 0.100m mark

m2 = 0.100kg at the 0.750m mark

m1(0.500 - 0.100) = m2(0.750 - 0.500) + m3(d-0.500)

0.2(0.4) = 0.1(0.25) + 0.05(d-0.5)

0.055 = 0.05d -0.025

d = 1.6 m

This indicates that the 0.050 kg weight must be placed on the right side, 1.6 m from the center of the scale; however, because the scale is only 0.5 meters long on each side of the center, adding 0.050 to the meterstick is impossible. If we add it anywhere along the 0.5 m length of the stick, the system will not be in equilibrium.

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When a force is applied to move an object, the work done is the force applied multiplied by the distance covered along the direction of the force.

It can be expressed asW = Fd cosθWhere,W = work doneF = force applied = distance covered along the direction of the forceθ = angle between the force and the direction of motion Given,Force applied = 32 pounds Distance covered along the direction of the force.

d = 50 feetAngle between the force and the direction of motion, θ = 42°The work done to move the crate is given byW =\(Fd cosθW = 32 × 50 cos 42°W = 32 × 50 × 0.7431W = 1192.16\) foot-pounds  the work done to drag the heavy crate along a level floor using a force of 32 pounds at an angle of 42° is 1192.16 foot-pounds.

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Answer:

The time it will take for the car to reach a velocity of 28 m/s is 7 seconds

Explanation:

The parameters of the car are;

The acceleration of the car, a = 4 m/s²

The final velocity of the car, v = 28 m/s

The initial velocity of the car, u = 0 m/s (The car starts from rest)

The kinematic equation that can be used for finding (the time) how long it will take for the car to reach a velocity of 28 m/s is given as follows;

v = u + a·t

Where;

v = The final velocity of the car, v = 28 m/s

u = The initial velocity of the car = 0 m/s

a = The acceleration of the car = 4 m/s²

t = =The time it will take for the car to reach a velocity of 28 m/s

Therefore, we get;

t = (v - u)/a

t = (28 m/s - 0 m/s)/(4 m/s²) = 7 s

The time it will take for the car to reach a velocity of 28 m/s, t = 7 seconds.

Answer:

0

Explanation:

When water is pumped out of well A, it causes a drop of 7 inches at point C; if water is pumped from well B into well A (at the same rate the water is pumped out of well A), then it will give a rise of 7 inches at well C. Therefore the net drawdown at well C is:

S = 7-7 = 0

Answer:

C. Reflects only

Answer:

As a rule sound travels slowest through gases, faster through liquids, and fastest through solids. The speed of light as it travels through air and space is much faster than that of sound; it travels at 300 million meters per second or 273,400 miles per hour. ... Speed of light in glass = 200 million m/s or 182,300 mph.

Explanation:

Almost always sound travels slowest via gases, faster via beverages, and fastest via solids. The velocity of light because it travels via air and area is a great deal quicker than that of sound; it travels at 300 million meters consistent with 2d or 273,400 miles in step with hour.

The pace of light in glass = 2 hundred million m/s or 182, 300 mph.

Mild waves are electromagnetic waves whilst sound waves are mechanical waves. Mild waves are transverse even as sound waves are longitudinal. Light waves can tour in a vacuum. Sound waves require a material medium to journey, and as a result, can not travel in a vacuum.

Nothing can travel faster than light except for sound. This is the declaration of a few US physicists, who say they've designed an unusual waveguide to make the sound move at “superluminal” speeds (Appl. Phys.

In 2015, a team of Scottish scientists announced that they had found a way to gradual the rate of mild. By sending photons via a unique mask, the researchers altered their shape. In this malformed kingdom, these infinitesimal particles of light traveled slower than normal photons.

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F = k•q1•q2/r2 is the electrostatic force between two charges. Where k is the coulomb's constant and r is the separation between the two charges, q1 and q2.

Thus; F ∝ q1•q2/r². The forces on charges q2 and q3 are added to provide the net force on charge q1. If the two charges are in opposition to one another, the force is attracting; if they are similar, the force is repulsive. Therefore, the force will be very minimal if the combination has the same sort of charges, such as (+1, +1,+1) or (-1,-1,1). The forces are currently ranked from smallest to largest as follows: q1 = +1 nc, q2 = +1 nc, and q3 = +1 nc are the smallest; q1 = -1 nc, q2 = -1 nc, and q3 = -1 nc are the largest. q1 = +1 nc, q2 = +1 nc, and q3 = -1 nc are the three largest. The next-largest values are q1 = +1 nc, q2 = -1 nc, and q3 = +1 nc.

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Answer:

Choice 2

Explanation:

Formula for Momentum is change in velocity * mass

Answer: Kinetic energy is the energy an object has because of its motion

(if it needs to be a one worded answer than just type motion)

The potential energy of an object depends on its mass and its height.

The law of conservation of energy states that energy can be neither created nor destroyed, but it can change its form.

Answer:Kinetic energy is the energy an object has because of its motion. If we want to accelerate an object, then we must apply a force. Applying a force requires us to do work.

As expressed by the equation, potential energy depends upon the mass and the height of the object. Any increase in these two quantities will lead to an increase in the amount of potential energy possessed by the object.

The law of conservation of energy states that energy can neither be created nor destroyed - only converted from one form of energy to another. This means that a system always has the same amount of energy, unless it's added from the outside.

The work done on a body when it is lifted through a height h appears in the form of its potential energy. Therefore, option (b) is the correct answer.

What is Geothermal Energy?

Geothermal energy is a type of renewable energy that is derived from the heat generated deep beneath the Earth's surface. It is produced by harnessing the naturally occurring heat from the Earth's core, which can be used to generate electricity or heat buildings directly. This energy can be accessed by drilling deep wells into the Earth's crust and tapping into the hot water and steam that is naturally present in underground reservoirs.

When a body is lifted through a height h, the work done on it appears in the form of potential energy. This is because the energy is stored in the body due to its position or configuration, rather than its motion.

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In order to determine the probability that an electron can be detected in the middle one-third of a well region, we need to take into account the wave function and the boundary conditions.The wave function represents the probability density of finding the electron in a particular location within the well. The boundary conditions are determined by the geometry of the well, which can be rectangular, triangular, or other shapes.

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Answer:

The velocity of the particle from T = 0 s to T = 4 s is;

0.5 m/s

Explanation:

The given parameters from the graph are;

The initial displacement (covered) at time, t₁ = 0 s is x₁ = 1 m

The displacement covered at time, t₂ = 4 s is x₂ = 3 m

The graph of distance to time, from time t = 0 to time t = 4 is a straight line graph, with the velocity given by the rate of change of the displacement to the time which is dx/dt which is also the slope of the graph given as follows;

\(The \ slope \ of \ the \ displacement \ time \ graph, \ m =velocity, \ v= \dfrac{x_2 - x_1}{t_2 - t_1}\)

\(Therefore, \ the \ velocity \ of \ the \ particle \ v = \dfrac{3 \ m - 1 \ m}{4 \ s - 0 \ s} = \dfrac{2 \ m}{4 \ s} = \dfrac{1}{2} \ m/s\)

The velocity of the particle from t = 0 s to t  = 4 s = 1/2 m/s = 0.5 m/s.

Answer:

Increase the number of loops in the coil.

Explanation:

Base on the scenario been described in the question, if the student wishes to increase the make the electromagnetic greater, the student should Increase the number of loops in the coil. By so doing, the electromagnetic force will be greater

The capacitors are connected, each capacitor has a charge of Qdc=6C. The capacitors' capacitances are C1=1.0F and C2=2.0F, and the source's emf is equal to 10V. The potential difference between A and B is 5.0V.

You add each of the capacitances using the method below to determine the total can be of the a number more capacitors joined in this way: CTotal Equals C1 Plus C2 + C3, etc. Example: to determine the combined capacitance of these three parallel capacitors.

C1 and C2 serve as coupling capacitors primarily, letting AC signals travel while block DC at the inputs and outputs in order to prevent voltages from earlier or later circuits from upsetting the biased condition for the this amplifier.

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Answer: The answer is an electric generator

Explanation:

I just took the quiz and I thought it was an electric motor but the correct answer was an electric generator.

This concept of closed loop wire experiences a changing magnetic field and flowing of current is related to the Faraday's law of electromagnetic induction.

When ever there is a bar magnet inside the wire and the magnet moves relative to the wire there will be an EMF generated in the coil and current can be flown.

similarly by reversing the process if the magnet remains stationary and the coil is moved then again the emf and the current generated in the coil which is called as electromagnetic induction.

This is the basic principle of transformers,generators,motors .

Thus when a closed loop of wire experiences a changing magnetic field a voltage and therefore current is produced.

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Answer:

“The only true wisdom is in knowing you know nothing.” ― Socrates. Socrates had it right. Remain humble and appreciate the fact that you don't know everything. ... Thankfully, one's search for knowledge has no end as there is always something new to learn, giving one's life meaning and purpose.

Explanation:

Answer:

knowing wisdom cool

Explanation:

lol

Answer:

  A.  The forces are the same size and in opposite directions.

Explanation:

Just as an opposite number will cancel a number: -1 +1 = 0, so an opposite force will cancel a force, with the result that the net is zero.

Its A The force are the same size and in opposite direction

Answer:

the weight of displaced liquid is equal to the submerged part of ship. so on adding more weight to ship net buyoncy acting on ship increases and more the ship sinks in sea thus weight of displaced liquid increases.

Explanation:

a. The surface temperature of the star is 4830 K.

b. The peak of the star's spectrum occurs at a wavelength of 1500 A. The wavelength falls within the ultraviolet range of the electromagnetic spectrum.

a. According to Wien's law, the peak wavelength (λ) of radiation emitted by a blackbody is inversely proportional to the temperature (T) of the blackbody. The mathematical formula is:λmaxT = 2.898 × 10-3 m K

Here, λmax = 6000 A = 6000 × 10-10 m = 6 × 10-7 mT

herefore, T = 2.898 × 10-3 m K / 6 × 10-7 m = 4830 K.

So, the surface temperature of the star is 4830 K.

b. According to Wien's law, the peak wavelength of radiation emitted by a blackbody is inversely proportional to the temperature of the blackbody. This means that when the temperature of the blackbody is increased, the peak wavelength will decrease.

In this case, if the temperature of the star were four times higher, its surface temperature would be T = 4 × 4830 K = 19320 K.

The peak wavelength of the star can be calculated using Wien's law, λmaxT = 2.898 × 10-3 m Kλmax = (2.898 × 10-3 m K) / 19320 Kλmax = 1.5 × 10-7 m = 1500 A.

The peak of the star's spectrum occurs at a wavelength of 1500 A. The wavelength falls within the ultraviolet range of the electromagnetic spectrum.

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Explanation:

Theoretical Discussion

The diffraction of classical waves refers to the phenomenon wherein the waves encounter an obstacle that

fragments the wave into components that interfere with one another. Interference simply means that the

wavefronts add together to make a new wave which can be significantly different than the original wave. For

example, a pair of sine waves having the same amplitude, but being 180◦ out of phase will sum to zero, since

everywhere one is positive, the other is negative by an equal amount.

Diffraction of waves is the bending of it when passing thought obstacle. The values in lab report of Waves and Diffraction of diffraction is found with formula,

\(\tan\theta=\dfrac{h}{D}\)

The diffraction of waves is the bending of waves or changing its direction when encounters an opening or obstacle.

The diffraction of waves depends on the type of wave. For example a sound wave is diffracted more than the light wave at obstacles.

The diffraction of waves for double slit can be calculated with the following formula.

\(\tan\theta=\dfrac{h}{D}\)

Here, (h) is the height of the minima or maxima and (D) is the distance of slit.

The above formula is used for the diffraction is lab experiment.

Hence, the  diffraction of waves is the bending of it when passing through an obstacle. The values in lab report of  Waves and Diffraction of diffraction is found with formula,

\(\tan\theta=\dfrac{h}{D}\)

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Answer:

gravity

Explanation:

The pull of Earth's gravity keeps the Moon in orbit; the moon is constantly changing direction because of gravity.