a capacitor rated at 50-uf is being charged by a constant current of 2 ma. what will the voltage across the capacitor be after 3 mins?

D. 55 Kg mass moving at 1 m/s, is the correct answer.

The more mass the object has, the greater inertia is. It doesn't matter how fast the object is going because inertia is depended on mass.

Answer:

Due to the resistance of air, a drag force acts on a falling body (parachute) to slow down its motion. Without air resistance, or drag, objects would continue to increase speed until they hit the ground. The larger the object, the greater its air resistance. Parachutes use a large canopy to increase air resistance. Also, Once the parachute is opened, the air resistance overwhelms the downward force of gravity. The net force and the acceleration on the falling skydiver is upward. An upward net force on a downward falling object would cause that object to slow down. The skydiver thus slows down. Sorry if not helpful.

The equation for the tangent line to the graph of a at t=10 is y = 3t - 25.

Assuming that the function for the amount of salt in the vat is represented by a differentiable function a(t), we can find the equation for the tangent line at t=10 using the derivative of a(t) with respect to t.

We can write the equation for the tangent line in point-slope form as:

y - y1 = m(t - t1)

where (t1, a(t1)) is the point of tangency and m is the slope of the tangent line.

The slope of the tangent line at t=10 is given by the derivative of a(t) evaluated at t=10, or a'(10):

m = a'(10)

We can use this information to find the equation of the tangent line at t=10. Assuming that a'(t) = 3t - 25, we have:

m = a'(10) = 3(10) - 25 = 5

Therefore, the equation of the tangent line at t=10 is:

y - a(10) = 5(t - 10)

Simplifying, we get:

y = 5t - 25

Using the tangent line, we can approximate the amount of salt in the vat at t=12. Plugging in t=12, we get:

y = 5(12) - 25 = 35

Therefore, we can approximate that there are 35 pounds of salt in the vat at t=12 minutes. However, this approximation is only valid if the function a(t) is well approximated by a linear function in the neighborhood of t=10.

To know more about tangent, visit;

https://brainly.com/question/1533811

#SPJ11

(a) The relativistic kinetic energy of a 1000-kg car moving at 30.0 m/s can be calculated using the equation:

K = [(γ - 1) * m * c^2] - mc^2

where K is the relativistic kinetic energy, γ is the Lorentz factor, m is the mass of the car, and c is the speed of light. If the speed of light were only 45.0 m/s, then the Lorentz factor can be calculated as:

γ = 1 / sqrt(1 - (v/c)^2) = 1 / sqrt(1 - (30/45)^2) ≈ 1.155

Substituting the values, we get:

K = [(1.155 - 1) * 1000 kg * (45.0 m/s)^2] - (1000 kg * (45.0 m/s)^2) ≈ 240 kJ

(b) The ratio of the relativistic kinetic energy to classical kinetic energy can be calculated as:

Krel/Kcl = [(γ - 1) / (v^2/c^2)] + 1

where Krel is the relativistic kinetic energy and Kcl is the classical kinetic energy. Substituting the values, we get:

Krel/Kcl = [(1.155 - 1) / (30.0 m/s)^2/(45.0 m/s)^2] + 1 ≈ 1.12

Therefore, the relativistic kinetic energy is about 1.12 times greater than the classical kinetic energy.

Learn more about the speed of light here:- brainly.com/question/394103

#SPJ11

When you place an extremely small almost point source of light at the primary focal point of a parabolic mirror, the reflected wave front will be a plane wave.

This plane wave is characterized by parallel wavefronts. The focal point of a parabolic mirror is defined as the point on the principle axis at which parallel light rays converge when they are parallel to the principle axis.

According to the principles of reflection, all light rays incident on a parabolic mirror are reflected such that they converge at the focal point. In the case of a point source of light positioned at the focal point of a parabolic mirror, all the light rays coming from that point are reflected in a parallel fashion. The wavefronts of the reflected light are thus parallel, resulting in a plane wavefront.

Know more about plane wave:

https://brainly.com/question/33258461

#SPJ4

Answer:

100kPa

Explanation:

Given parameters:

Initial volume of gas  = 1L

Pressure  = 200kPa

Final volume  = 2L

Unknown:

Final pressure  =  

Solution:

According to Boyles's law "the volume of fixed mass of gas of a gas varies inversely as the pressure changes if temperature is constant".

  Mathematically;

            P₁V₁  = P₂V₂

P and V are volume and pressure

1 and 2 are initial and final states

  Insert the parameters and solve;

            200 x 1  = P₂ x 2

                 P₂  = 100kPa

The primary job of a(n) ____

is to increase the power of a modified radio wave.

Answer:

Explanation:

Hope it helps:)

#CarryOnLearning

Answer: Amplifier

Explanation: Edge 2021

Have a great day :D

Answer:

The value of new coulomb force is 1.43 N.

Explanation:

Given;

Coulomb's force in vacuum (air), \(F_v\) = 10 N

dielectric constant, K = 7

The Coulomb's force between two charges separated by a distance r in a vacuum is given as;

\(F_v = \frac{1}{4\pi \epsilon_0} \frac{q_1q_2}{r^2}\)

The Coulomb's force between two charges separated by a distance r in a medium with dielectric constant is given as

\(F_m = \frac{1}{4\pi K\epsilon_0} \frac{q_1q_2}{r^2}\)

Take the ratio of the two forces;

\(\frac{F_v}{F_m} = \frac{1}{4\pi \epsilon_0} \frac{q_1q_2}{r^2} \ \times \ \frac{4\pi K\epsilon_0 r^2}{q_1q_2} = K\\\\\frac{F_v}{F_m} = K\\\\\frac{10}{F_m} = 7\\\\F_m = \frac{10}{7} \\\\F_m = 1.43 \ N\)

Therefore, the value of new coulomb force is 1.43 N.

The density of lead in SI units (kilograms per cubic meter) is 11,320.43 kg/m³.

The formula for the density of a material is expressed as follows; Density = Mass/Volume.

To find the density of the solid lead, you need to divide the mass of lead by the volume of lead.

Since the mass of lead is 31.58 g and the volume is 2.79 cm³; Density = Mass/Volume

Density = 31.58 g/2.79 cm³

We know that 1 cm³ = 1 ml, and 1 ml of water = 1 g. So, 1 cm³ of water has a mass of 1 g and occupies a volume of 1 cm³.

So the volume of lead in SI units (m³) is found by converting 2.79 cm³ to meters: Volume (m³) = (2.79 cm³) × (0.01 m / 1 cm)³ = 2.79 × 10⁻⁶ m³

Now, substituting the values above into the density formula; Density = 31.58 g/2.79 cm³Density = 11320.43 kg/m³

Therefore, the density of lead in SI units (kilograms per cubic meter) is 11,320.43 kg/m³.

to know more about vessels here:

brainly.com/question/33442617

#SPJ11.

Answer:

blue and purple light

Explanation:

Light waves have very, very short wavelengths. Red light waves have wavelengths around 700 nanometers (nm), while blue and purple light have even shorter waves with wavelengths around 400 or 500 nm.

Answer:

Explanation:

A: wrong. Mass and weight are different.

B: Wrong. The mass here and the mass on the moon are the same. The weight, which is Mass * the acceleration  is equal to weight.

C: Correct.

D: Wrong. Weight is not measured in Kg. Mass is.

The voltage drop across the 180 ohm resistor is 7.50 volts.

To find the voltage drop across the 180 ohm resistor, we can use Ohm's Law, which states that voltage (V) is equal to the product of current (I) and resistance (R), or V = I * R.

Since the resistors are connected in series, the current passing through both resistors is the same. Let's call this current I.

We know the voltage drop across the 120 ohm resistor is 5.00 V. Using Ohm's Law for the 120 ohm resistor, we have 5.00 V = I * 120 ohms. Rearranging this equation, we can find the value of I:

I = 5.00 V / 120 ohms

I = 0.0417 A (rounded to four decimal places)

Now that we have the current, we can use Ohm's Law again to find the voltage drop across the 180 ohm resistor:

V = I * R

V = 0.0417 A * 180 ohms

V = 7.50 V (rounded to two decimal places)

For such more questions on voltage

https://brainly.com/question/30542383

#SPJ8

As the raindrops do not provide a continuous path to flow the electrons because the air between the rain droplets acts as an insulator, therefore, the person walking under an electric transmission line would not be electrocuted.

In physics, a conductor can be described as a type of material that allows the flow of charge in one or more directions. Electric current is produced by the flow of negatively charged electrons or ions in some cases.

Raindroplets have dissolved impurities which make them somewhat conductive of electricity, but conductors should be continuous to create a conducting path at normal voltages.

The electric current can only flow when there is a continuous path of conductive material providing a conductor for electrons to travel through. The continuous flow of electrons needs to be an unbroken path to allow it to flow.

Since the air can be considered an insulating material and an air gap separates prevents a continuous path has been broken therefore electrons cannot flow.

Therefore, due to the absence of the closed circuit, you would not be electrocuted during a rainstorm if you walked under an electric transmission line.

Learn more about electrical conductor, here:

https://brainly.com/question/1317755

#SPJ1

Kinetic energy = 29.912 J

Given

mass = 0.155 kg

vo=initial velocity = 31.4 m/s

h/d=30 m

Required

KE=kinetic energy

Solution

vt²=vo²-2ad⇒vt=final velocity

vt²=31.4²-2.10.30⇒g=10 m/s²

vt²=985.96-600

vt²=385.96 m/s

Kinetic  energy (KE)

\(\tt KE=\dfrac{1}{2}mv^2\\\\KE=\dfrac{1}{2}\times 0.155.\times 385.96\\\\KE=29.912~J\)

Answer:

The answer is 30.8 (J)

Explanation:

You're welcome

The time taken for the coffee to cool from 93°C to 73°C is approximately 36.1 minutes.

The cooling law is given by:

$$\frac{dQ}{dt}=-k(T-T_0)$$

where Q is the heat in the object, t is the time taken, T is the temperature of the object at time t, T0 is the temperature of the environment and k is a constant known as the cooling constant.

We need to find the time it takes for the coffee to reach a drinking temperature of 73°C given that its initial temperature is 93°C.

Therefore, we need to find the time it takes for the coffee to cool down from 93°C to 73°C when placed in a room temperature of 18°C.

Let’s assume that the heat energy that is lost by the coffee is equal to the heat energy gained by the environment. We can express this as:

dQ = - dQ where dQ is the heat energy gained by the environment.

We can substitute dQ with C(T-T0) where C is the specific heat capacity of the object.

We can rearrange the equation as follows:

$$-\frac{dQ}{dt}=k(T-T_0)$$

$$-\frac{d}{dt}C(T-T_0)=k(T-T_0)$$

$$\frac{d}{dt}T=-k(T-T_0)$$

The differential equation above can be solved using separation of variables as follows:

$$\frac{d}{dt}\ln(T-T_0)=-k$$

$$\ln(T-T_0)=-kt+c_1$$

$$T-T_0=e^{-kt+c_1}$$

$$T=T_0+Ce^{-kt}$$

where C = e^(c1).

We can now use the values given to find the specific value of C which is the temperature difference when t=0, that is, the temperature difference between the initial temperature of the coffee and the room temperature.

$$T=T_0+Ce^{-kt}$$

$$73=18+C\cdot e^{-0.09t}$$

$$55=C\cdot e^{-0.09t}$$

$$C=55e^{0.09t}$$

$$T=18+55e^{0.09t}$$

We can now solve for the value of t when T=93 as follows:

$$93=18+55e^{0.09t}$$

$$e^{0.09t}=\frac{93-18}{55}$$

$$e^{0.09t}=1.3636$$

$$t=\frac{\ln(1.3636)}{0.09}$$

Using a calculator, we can find that the time taken for the coffee to cool from 93°C to 73°C is approximately 36.1 minutes.

For more such questions on time, click on:

https://brainly.com/question/26046491

#SPJ8

Answer:

this is the answer for the question and i hope it will help

Answer:It is pull force:it takes our force

The work which is done is very hard

Answer:

Yes the correct answer is B

Explanation:

Answer:

D i think

Explanation:

dont need a explanation it's just D

Answer:

p2=28.12KPa

Explanation:

Given data:

Initial temperature = 295 K

Final temperature= 395 K

Initial pressure = 21.0 KPa

Final pressure = ?

Solution:

According to Gay-Lussac Law,

The pressure of given amount of a gas is directly proportional to its temperature at constant volume and number of moles.

Mathematical relationship:

P₁/T₁ = P₂/T₂

Now we will put the values in formula:

21.0 KPa / 295 K = P₂/395 K

P₂ = 21.0 KPa× 395 K / 295 K

P₂ = 8295 KPa. K /295 K

P₂ = 28.12 KPa

The most likely reason for the occurrence of coral reefs on the southeast coast of the United States and not on the southwest coast is differences in water temperatures driven by ocean currents. (C)

Coral reefs require warm waters with a narrow temperature range to thrive, and ocean currents play a significant role in regulating these temperatures.

The Gulf Stream current flows along the southeast coast, bringing warm waters from the tropics, while the California Current flows along the southwest coast, bringing cold waters from the north.

These temperature differences make it challenging for coral reefs to survive in the waters off the southwest coast. Although air temperatures driven by precipitation and salinity differences can also affect coral reef growth, ocean currents and water temperatures are the most critical factors in determining their distribution.(C)

To know more about coral reefs click on below link:

https://brainly.com/question/15794949#

#SPJ11

The accelerating voltage at which the second order beam is observed at an angle of 55 degrees is approximately 54.3 V.

The Davisson-Germer experiment involves directing a beam of electrons onto a crystal surface in order to determine its structure. According to this experiment, the electrons are diffracted by the crystal lattice and their scattering patterns can be used to determine the spacing between the atoms.In the Davisson-Germer experiment using a Ni crystal, a second-order beam is observed at an angle of 55 degrees. The spacing between the atoms is 0.215 nm.

To calculate the accelerating voltages for this, we can use Bragg's law which is given as

2dsinθ = nλ

Where,θ = angle of incidence

λ = wavelength of incident electron

n = order of diffraction

d = inter-atomic spacing of crystal

Now, for the second order beam,

n = 2.θ = 55 degreesd = 0.215 nm (given)

Substituting these values in Bragg's law, we get

2dsinθ = nλ∴ 2 x 0.215 x sin(55)

= 2λλ = (2 x 0.215 x sin(55)) / 2λ

= 0.165 nm

The de Broglie wavelength of the electron can be calculated using the following formulaλ = h/p

Where,h = Planck's constant = 6.63 x 10^-34 J

sp = momentum of the electron = mv

Where,m = mass of the electron = 9.1 x 10^-31 kg

v = velocity of the electron

v = √(2eV/m)Where,

V = accelerating voltage of the electron

Substituting these values in the above formula, we get

λ = h/p∴ λ = h/mv

Where, v = √(2eV/m)

Substituting this value, we get

λ = h/√(2eVm)

Therefore,λ = h/√(2eVm)

= 0.165 nm (from Bragg's law)h/√(2eVm)

= 0.165 x 10^-9 m6.63 x 10^-34 / √(2 x 1.6 x 10^-19 x V x 9.1 x 10^-31)

= 0.165 x 10^-9√V = [6.63 x 10^-34 / (0.165 x 10^-9 x √(2 x 1.6 x 10^-19 x 9.1 x 10^-31))]V

= 54.3 V (approx)

Therefore, the accelerating voltage at which the second order beam is observed at an angle of 55 degrees is approximately 54.3 V.

To know more about accelerating voltage refer to:

https://brainly.com/question/31384904

#SPJ11

Answer:

A liquid is a nearly incompressible fluid that conforms to the shape of its container but retains a (nearly) constant volume independent of pressure. A liquid is made up of tiny vibrating particles of matter, such as atoms, held together by intermolecular bonds.

Answer:

The work is done by the force 100 NM.

Explanation:

=5kg * 2 m/s^2

=5* 2 N (kg*m/s^2=N)

=10N

Work done = force* distance

=10N* 10

= 100 NM

For an object of mass 5 kg accelerating at the rate of 2 m/s², then the work done by the force on the object will be 100 Nm.

In physics, the word "work" involves the measurement of energy transfer that takes place when an item is moved over a range by an externally applied, at least a portion of which is applied within the direction of the displacement.

The length of the path is multiplied by the element of a force acting all along the path to calculate work if the force is constant. The work W is theoretically equivalent towards the force f times the length d, or W = fd, to portray this concept.

As per the given information in the question,

Mass of the object, m = 5 kg

Acceleration, a = 2 m/s²

Distance, d = 10 m

W = f × d

W = m × a × d

W = 5 × 2 × 10

W = 100 Nm

To know more about Work:

https://brainly.com/question/13662169

#SPJ2

Ans is false. There are several errors associated with observation: subjectivity, observer bias, accuracy, and interpretation.

Observational error (or measurement error) is the difference between a measured value of and its true value.

The errors associated with data collection, mentioned above can be defined as follows:

1. Subjectivity bias : the tendency of participant in a study to react, either consciously or unconsciously. Here they act experimentally and not naturally.

2. Observation bias : the tendency of observers to not see what is there, but instead to see what they expect or want to see.

3) Accuracy : the condition or quality of being true, correct, or exact; freedom from error or defect; precision or exactness; correctness.

4) interpretation: can be defined as understanding of something. One can avoid it by using multiple sources of information, such as references and personal interviews,

To know more about observational error, click on https://brainly.com/question/2764830

#SPJ4

When a beam of a photon with wavelength (λ) is doubled, momentum (p) will be halved.

What is Wavelength?

The distance in a wave between a given position and the same point in the following wave cycle. This can be from peak to peak, from trough to trough, from null to null, etc. The formula E = hν = hc/λ, where E is energy, h is Planck's constant, is frequency, c is the speed of light, and is the wavelength, relates wavelength to energy and frequency.

What is Momentum?

The definition of momentum is "mass in motion." Since every item has mass, if it is moving, it must have momentum because its mass is in motion. The amount of motion and the speed of the motion are the two factors that determine how much momentum an item possesses. The factors of mass and velocity affect momentum. According to an equation, an object's momentum is determined by multiplying its mass by its velocity.

Momentum = mass • velocity, (p = mv)

Hence, When a beam of a photon with wavelength (λ) is doubled, momentum (p) will be halved.

To know more about Momentum, check out:

https://brainly.com/question/1042017

#SPJ4

Answer:

2,3

Explanation:

2,3      3 is the definition of Archemedes' Principle

Answer:

The velocity when the ball hits the ground is obtained using v2. 2 = v1. 2 + 2 g Dy with v1=0 and Dy=h. Thus solving for v2 yields 17.1 m/s v2 = 2 g h =.

21 pages·330 KB

Answer:

I e jofh ndoj eohe nc n very nic e

Answer:

Yes please message me and I will help you

Explanation: