tides occurs in oceans but not in lakes.why?​

The time (t) required for the voltage across the capacitor to reach 10.0 V after the switch is closed can be determined using the time constant of the circuit. The answer will be expressed with two significant figures and the appropriate units.

In an RC circuit, the voltage across the capacitor (Vc) as a function of time (t) can be described by the equation:

Vc(t) = V₀ * (1 - \(e^{-t/RC}\))

where V₀ is the initial voltage across the capacitor, R is the resistance in the circuit, C is the capacitance of the capacitor, and e is the base of the natural logarithm.

To find the time at which the voltage across the capacitor equals 10.0 V, we need to solve the equation Vc(t) = 10.0 V for t.

Since the question doesn't provide specific values for R and C, we cannot calculate an exact time. However, we can discuss the general concept. In an RC circuit, the time constant (τ) is defined as the product of the resistance and capacitance, τ = RC.

The time constant represents the time it takes for the voltage across the capacitor to reach approximately 63.2% of its final value.

To estimate the time at which the voltage reaches 10.0 V, we can consider that it would take around 5 time constants for the voltage to approach its final value. Therefore, the approximate time (t) would be 5 times the time constant (τ).

However, without knowing the specific values of R and C, we cannot provide an exact numerical answer. It is essential to know the resistor and capacitor values to calculate the time accurately.

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By using uniform motion, the speed before hitting the ground is 23.00 m/s.

We need to know about the uniform motion to solve this problem. The uniform motion is an object's motion under acceleration. It should follow the rule

vt = vo + a . t

vt² = vo² + 2a . s

s = vo . t + 1/2 . a . t²

where vt is final velocity, vo is initial velocity, a is acceleration, t is time and s is displacement.

From the question above, we know that

vo = 0 m/s

t = 1.45 s

y = 27 m

g = 9.8 m/s²

By using the second equation, we can calculate the speed before hit the ground.

vt² = vo² + 2a . s

vt² = 0² + 2g . 27

vt² = 2 . 9.8 . 27

vt² = 529.2

vt = 23.00 m/s

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Answer: Harvest Moon

Explanation:

But to most casual observers, the moon will appear fully illuminated in the night sky from Sunday through Tuesday. In the Northern Hemisphere, the full moon that appears closest to the fall equinox is traditionally referred to as the "Harvest Moon."

Storm signal number 1 is a form of weather caution issued via the Philippine Atmospheric, Geophysical, and Astronomical Services Administration (PAGASA) to alert the public to the opportunity of a tropical cyclone entering the USA.

When a storm sign number 1 is raised, it method that a tropical cyclone, along with a tropical despair or tropical hurricane, is expected to affect a particular region within the next 36 hours.

The winds related to the cyclone aren't yet strong sufficient to cause widespread harm, but they may be sufficient to disrupt transportation and different outside sports.

Throughout storm sign number 1, the general public is cautioned to be vigilant and take precautions, which include securing loose items and staying indoors if feasible.

Fishermen are recommended to keep away from going out to sea, and small vessels are cautioned to take refuge. PAGASA issues hurricane signal warnings up to a wide variety of five, with better numbers indicating more intense climate situations.

The warnings are a crucial tool for helping the general public to put together for and stay safe throughout tropical cyclones, which could reason extensive damage and loss of life within the Philippines.

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The loop has dimensions 4.00 cm by 60.0 cm, mass 24.0 g, and resistance R = 8.00x10^-3 Ω.

Part A:

Initially, the loop is at rest, and a constant force Fext = 0.180 N is applied to the loop to pull it out of the field. The magnetic force Fm on the loop is given by:

Fm = ∫ (I × B) ds,

where I is the current, B is the magnetic field, and ds is the length element. The loop moves with a velocity u, and there is no contribution of the magnetic field in the direction perpendicular to the plane of the loop.

The external force Fext causes a current I to flow through the loop.

I = Fext/R

Here, R is the resistance of the loop.

Now, the magnetic force Fm will oppose the external force Fext. Hence, the net force is:

Fnet = Fext - Fm = Fext - (I × B × w),

where w is the width of the loop.

Substituting the value of I in the above equation:

Fnet = Fext - (Fext/R × B × w)

Fnet = Fext [1 - (w/R) × B] = 0.180 [1 - (0.06/8.00x10^-3) × 3.30] = 0.0981 N

Neglecting friction, the net force will produce acceleration a in the direction of the force. Hence:

Fnet = ma

0.0981 = 0.024 [a]

a = 4.10 m/s^2

Part B:

The terminal speed vt of the loop is given by:

vt = Fnet/μ

Where, μ is the coefficient of kinetic friction.

The loop is in the region of the uniform magnetic field. Hence, no friction force acts on the loop. Hence, the terminal speed of the loop will be infinite.

Part C:

When the loop is moving at the terminal speed, the net force on the loop is zero. Hence, the acceleration of the loop is zero.

Part D:

When the loop is completely out of the magnetic field, there is no magnetic force acting on the loop. Hence, the force acting on the loop is:

Fnet = Fext

The acceleration of the loop is given by:

Fnet = ma

0.180 = 0.024 [a]

a = 7.50 m/s^2

Hence, the acceleration of the loop when u = 3.00 cm/s is 4.10 m/s^2. The loop's terminal speed is infinite. The acceleration of the loop when the loop is moving at the terminal speed is zero. The acceleration of the loop when it is completely out of the magnetic field is 7.50 m/s^2.

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The amount of energy a battery can hold is known as its power capacity. Watt-hours are a common way to measure this power (the symbol Wh).

Current times voltage equals power. This relationship demonstrates how voltage and current are crucial in determining what a battery is good for. The higher the power, the quicker the rate at which a battery can perform work.

P = E/t, where P stands for power, E for energy, and t for time in seconds, is the formula. According to this equation, power is the amount of energy consumed in a given amount of time.

Read the colour codes on the resistor while holding it with the gold or silver band to the right. From the bands on the resistor, choose the appropriate colour code. From left to right, read the colours. Now the resistance value depending on the supplied colour code is visible.

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The resulting velocity of the 500-g cart is 0 m/s. The resulting velocity of the 1000-g cart is 1 m/s.

The magnitude\(F_{P}\)  of the force you need to exert on the crate to make it continue to slide along the floor with constant velocity is  437.5N.

The Normal Force (in a horizontal plane, it is comparable to the mass by gravity) and the Kinetic Coefficient of Friction must be multiplied in order to obtain the Friction Force, which must be used in order to solve this problem.

Given that the sentence does not specify the value of the coefficient of friction, I will ascribe a value of 0.5 between the crate and the ground. If a different value has been specified for this coefficient, the below equation will simply need to be changed to reflect it.

\(F_{P}\) = µK N

µK = Friction coefficient

Normal Force is N.

Replacing,

\(F_{P}\) = 0.5 × 875

\(F_{P}\) = 437.5N.

Consequently, the crate is subject to a friction force of 437.5N.

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Complete question is "Suppose you have to move a heavy crate of weight 875 {\rm N} by sliding it along a horizontal concrete floor. You push the crate to the right with a horizontal force of magnitude 300 {\rm N}, but friction prevents the crate from sliding. Now assume that the crate is sliding along the floor with constant velocity. What is the magnitude F_p of the force you need to exert on the crate to make it continue to slide along the floor with constant velocity?"

Answer:

when the ball falls down

Explanation:

because gravity is a very strong Force

Answer:

a

Explanation:a

Given that the balloon is negatively charged and it is touching a wooden wall, the ballon will perform all the actions given in the answer choices.

A negatively charged balloon will pull positive charge on the wall surface towards it, since opposite charges attract each other.

Also, the negatively charged balloon touching a wooden wall will push any negative charge in the wall away from it. This is because like charges repel each other.

The negatively charged balloon also polarizes the molecules on the wall. This is because in molecules, atoms are bonded together since protons in one atom attract the electrons in the cloud of another atom.

Therefore, the correct choice is All of the above

ANSWER:

All of the above

Answer:

Explanation:

This is a product of a mass and velocity of a moving or a rest body.

it is expressed as P(momentum)=M(mass) × V(velocity)

Its SI unit is kgm/s

From our question.

Given

Momentum=3600kgm/s

Velocity=6m/s

RTF=Mass

Solution

P=M×V

M=P/V

= 3600kgm/s

6m/s

The teenager should throw the apple straight up, if she wants to catch it. Option c is correct.

When the teenager is riding the bicycle at a constant speed in a straight line, the bicycle and the rider are moving together as a single system. If the teenager were to throw the apple forwards or backwards, it would have some horizontal velocity relative to the bicycle, and this would cause it to travel along a curved path due to the combined motion of the bicycle and the apple.

The motion of the bicycle and the motion of the apple are independent of each other, and throwing the apple forwards or backwards would introduce a horizontal component to its motion that could cause it to miss the rider's hand when it comes back down. By throwing the apple straight up, the rider can catch it when it comes straight back down, regardless of the bike's motion. Therefore, the correct option is (c), throw the apple straight up.

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Answer:

the correct answer is B) 27.

Explanation:

To find the angle of refraction, you can use the formula:

n1 * sin(angle of incidence) = n2 * sin(angle of refraction)

where n1 and n2 are the refractive indices of the two media (in this case, air and the liquid), and the angles are measured from the normal to the surface.

Plugging in the values from the problem, we have:

1 * sin(40) = 1.5 * sin(angle of refraction)

Solving for the angle of refraction, we get:

angle of refraction = sin^-1(1/1.5 * sin(40))

Using a calculator or a table of trigonometric functions, we can find that the value of sin^-1(1/1.5 * sin(40)) is approximately 27.3 degrees.

Therefore, the correct answer is B) 27.

It will cost 0.324 Dollars to light six 100w light bulbs for six hours if the price of electrical energy is $0.09/ kwh.

kwh is commercial unit of electric energy. 1 unit= 1 kwh.

When 100 w power device is run for 1 hour, the amount of electrical energy consumed is 1 kwh.

We will find total units of electrical energy consumed in the given question.

energy consumed by 6 bulbs = 6×100= 600 w( joules per second).

The value in kwh is = 600÷1000

                                = 0.6kwh

Total energy consumed in 6 hours is = 0.6×6 = 3.6 kwh

So, the cost is = 3.6×0.09 = 0.324 dollars.

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The position versus time plot of driven harmonic motion when the driving frequency is slightly higher than the theoretical natural frequency will show a sinusoidal oscillation with a gradually increasing amplitude.

What is harmonic?
A harmonic wave, like a sinusoidal wave, has a frequency that is an integer multiple of the basic frequency, or the frequency of the initial periodic signal. The first harmonic of the original signal is also referred to as that; higher harmonics are the other harmonics. The sum of harmonics is periodic at the fundamental frequency because all harmonics are at that frequency as well. A harmonic series is formed by the group of harmonics.

The phrase is used in a variety of fields, including radio technology, physics, acoustics, power electronics transmission, and music. For instance, if indeed the frequency response is 50 Hz, which is a typical AC power supply frequency, the first three higher harmonics' frequencies are 100 Hz (second harmonic), 150 Hz, and 200 Hz (3rd harmonic).

As the driving frequency increases, the amplitude of the oscillation will become more pronounced and eventually reach a peak before decaying back to the original amplitude. The period of the oscillation will remain constant, even as the amplitude increases.

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Answer: the answer is 108 N

Just took the test and got 108 N correct

The event horizon is the hypothetical edge of a black hole where the escape velocity is the speed of light.

The event horizon is the boundary around a black hole beyond which nothing, not even light, can escape. It is the point of no return, where the gravitational pull of the black hole becomes so strong that the escape velocity required to overcome it exceeds the speed of light.

Any object or radiation that crosses the event horizon is effectively trapped within the black hole's gravitational field and cannot escape. The event horizon is considered the boundary between the region of space just outside the black hole and the region inside the black hole, where the singularity is located at the center.

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(a) At t=0, the switch is closed for the first time. Hence, the capacitor will start to charge from 0 to the full voltage of the battery over time. The time constant τ is given by:τ = RC = 61.9 Ω × 4.00 mF = 0.247 s When the switch is closed, the capacitor acts like an open circuit (i.e., does not allow current to flow) for a very short time until it charges up. Hence, we can consider the circuit without the capacitor for t < 0 and then add the capacitor at t = 0.

According to Kirchhoff's loop rule, the voltage around the loop should be zero: iR + vC = 0 Here, i is the current in the circuit at time t, R is the resistance, vC i the voltage across the capacitor terminals. iR = i × R = (9.42 V)/(61.9 Ω) = 0.152 A Voltage across the capacitor at t = 0 is given by: vC = V0(1 - e-t/τ) = 9.42 V(1 - e-0/0.247) = 9.42 V(1 - 1) = 0 V Substituting the values in the loop rule: iR + vC = 0 we get: iR = - vC => i = - vC/R = - 0/61.9 = 0 Also, the current in the circuit at t = 0 is 0 A.(b) One time constant after the switch is closed (t = τ)Let's consider the circuit diagram again as shown below: The voltage across the capacitor terminals is given by: vC = V0(1 - e-t/τ) = 9.42 V(1 - e-τ/τ) = 9.42 V(1 - e-1) = 3.53 V According to Kirchhoff's loop rule, the voltage around the loop should be zero: iR + vC = 0Substituting the values in the loop rule: iR + vC = 0 we get: iR = - vC => i = - vC /R = - 3.53 V/61.9 Ω = - 0.057 Also, the current in the circuit at t = τ is - 0.057 A.

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a) The current flowing through the resistor at t = 0 is 0.152 A.

b) The current flowing through the resistor one time constant after the switch is closed is 0.099 A.

Given Data; Resistor, R = 61.9 Ω, Capacitance, C = 4.00 mF = 4.00 x 10^⁻3 FEMF of battery, ε = 9.42 V.

(a) Current through the resistor at t = 0, when the switch is closed. We know that initially (i.e., for t < 0), the capacitor was uncharged. Therefore, there is no charge on the capacitor before closing the switch. When the switch is closed, the capacitor starts charging, and the current flows in the circuit. Hence, current starts flowing through the circuit instantaneously. The current is maximum at t = 0.

According to Kirchhoff's Loop Rule, we have: ε = V_R + V_C, where V_R is the potential difference across the resistor, and V_C is the potential difference across the capacitor at any time t. Since the capacitor is uncharged before closing the switch, there is no potential difference across the capacitor at t = 0.Now, applying Kirchhoff's Loop Rule, we get:ε = V_R + V_Cε = IR + (q / C) ...(1) where, I is the current in the circuit at any time t and q is the charge on the capacitor at time t=0.At t = 0, the capacitor is uncharged, so q = 0. Substituting the given values in equation (1), we get;9.42 = I x 61.9I = 0.152 A. Therefore, the current flowing through the resistor at t = 0 is 0.152 A.

(b) Current through the resistor at t = t_r = R x C = 61.9 x 4.00 x 10^⁻3 = 0.2476 s. One-time constant (t_r) after the switch is closed, the charge on the capacitor will be (1 - 1/e) times the maximum charge (q_max) on the capacitor. Hence, the potential difference across the capacitor at t = t_r is given by: V_C = q / C = q_max (1 - e^(-t/t_r)) / C. Substituting q_max = ε x C in the above equation, we get: V_C = ε (1 - e^(-t/t_r)). Therefore, the potential difference across the resistor is given by: V_R = ε - V_CV_R = ε - ε (1 - e^(-t/t_r))V_R = ε e^(-t/t_r) Substituting the value of V_R in the equation (1), we get;ε = IR + V_Cε = IR + ε (1 - e^(-t/t_r)) / CI = (ε / R) (1 - e^(-t/t_r)) Substituting the given values, we get; I = (9.42 / 61.9) (1 - e^(-0.2476 / 0.2476))I = 0.099 A. Therefore, the current flowing through the resistor one time constant after the switch is closed is 0.099 A.

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Hi, to answer your question regarding the comparison of the magnitudes of kinetic energy (K_A and K_B) of puck A and puck B when they reach the finish line, we need to consider the following steps:

1. Kinetic energy is defined as KE = 0.5 * m * v^2, where m is the mass of the object, and v is its velocity.

2. In order to compare K_A and K_B, we need to know the masses and velocities of both pucks A and B at the instant they reach the finish line.

Since the question does not provide any information about the masses and velocities of the pucks, we cannot determine whether K_A is equal to, greater than, or less than K_B. Therefore, the correct answer is: "You need more information to decide."

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You should always measure your following distance in A. seconds. This helps maintain uniformity and consistency.

Using time as a measure of following distance allows for consistency in maintaining a safe space between vehicles, regardless of speed. The recommended following distance is typically 3 seconds, which can be adjusted depending on road conditions, visibility, and other factors.

The other options are incorrect because:

B. Car lengths: Measuring distance in car lengths can be misleading, as different vehicles have varying lengths, and this method doesn't account for changes in speed. At higher speeds, a greater distance is needed to react and stop safely.

C. Feet: Measuring distance in feet can also be problematic, as it is challenging to estimate this distance while driving, and it doesn't account for variations in speed. A larger distance is required to ensure adequate reaction time and safe stopping at higher speeds.

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Displacement (s)=25m

Time taken (t)=5 sec

Average Velocity (v)= ?

now,

v= d÷ t

v= 25m÷ 5

v= 5m/s

Answer:

\(displacement= 25m \\ time = 5 \: sec \\ avarage \: velocity = \frac{displacement}{time} \\ = \frac{25}{5} = 5 \frac{m}{sec} \\ thank \: you\)

When a hydrogen atom makes a direct transition from an upper energy level to the ground (lowest) energy level, it releases energy in the form of a photon.

This photon has a specific wavelength and frequency, which corresponds to the energy difference between the two energy levels. The transition is known as a "spectral line" and is often used to identify elements in the universe. The energy levels of hydrogen are quantized, meaning they can only exist at specific levels and cannot exist in between them.

  The transition from a higher to a lower energy level is accompanied by the emission of a photon, while the opposite process of absorbing a photon can cause the electron to move from a lower to a higher energy level. This phenomenon is crucial to understanding the behavior of atoms and the energy changes that occur during chemical reactions and other processes.

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Solve the given problem as

The correct option is B, the most likely composition of the piece of metal is Copper.

Density = Mass / Volume

The metal's volume is determined by:

Volume = (5.0 mm) x (15.0 mm) x (30.0 mm) = \(2.25 \times 10^-5 m^3\)

Therefore, the density of the metal is:

Density = 0.0200 kg / (\(2.25 \times 10^-5 m^3\)) = \(888.9 kg/m^3\)

Density is a physical property of matter that describes how much mass is contained within a certain volume. It is defined as the amount of mass per unit volume of a substance. In other words, density is the measure of how tightly packed the particles of a substance are. The units of density are typically grams per cubic centimeter (g/cm3) or kilograms per cubic meter (kg/m3).

The density of a substance can provide useful information about its physical and chemical properties. For example, the density of a material can be used to identify it, and it can also give insight into its strength, durability, and other characteristics. Additionally, the density of a substance can affect its behavior in various environments, such as its buoyancy in water or its ability to conduct heat and electricity.

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Complete Question:-

You purchase a rectangular piece of unknown metal from a thrift store that has dimensions 5.0 mm by 15.0 mm by 30.0 mm. At home you determine the mass to be 0.0200 kg. What is the most likely composition of the piece of metal?

a. Silver

b. Copper

c. Iron

d. Brass

"If the darts are thrown at the same speed then (B) Projectile that travels along trajectory B was projected earlier and (C) Second dart must be projected at angle, such that 0 + 0,8 = 90° is correct."

Initial speed of dart A = u'

Angle of dart A = θ'

Initial speed of dart B = u''

Angle of dart B = θ''

Both darts start out at the same speed,

Thus, u' = u'' = u

The darts are launched one at a time from the same location A, but not simultaneously. However, they cover the same horizontal distance and arrive at B simultaneously.

Since both darts' horizontal ranges are equal,

= [ u²sin(2θ') / g ] =  [ u²sin(2θ'') / g ]

= sin(2θ') = sin(2θ'')

Although θ' is not equal to θ", we can infer that θ" >θ' from the figure.

Since both are acute angles,

= sinθ'' > sinθ'

Multiplying both sides by 2u/g, we get,

= [ 2u X sinθ'' / g ] > [ 2u X sinθ' / g ]

so that the two darts' respective trajectories are as follows:

= T'' > T'.

Thus, statement B and C are correct options.

The given question is incomplete. The complete question is '(A) Projectile that travels along trajectory A was projected earlier (B) Projectile that travels along trajectory B was projected earlier. (C) Second dart must be projected at angle e, such that 0 + 0,8 = 90° (D) Second dart must be projected at angle , >, STA​.'

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Surprise is the facial expressions is recognized by people of all cultures.

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Answer:

its should be 2.0 and 4.5 on it

Answer:

Mass of the ball, M = 6.667 kg

Explanation:

Given data:

Momentum, Mo = 10.0 kgm/s

Velocity of the rolling ball, V = 1.5 m/s

Mass of the body, M = ?

Momentum, Mo = Mass, M x Velocity, V

10.0 kgm/s = M x 1.5 m/s

Divide each side by 1.5 m/s

M = 10.0 kgm/s / 1.5 m/s

M = (6⅔) kg

:. Mass of the ball, M = 6.667 kg

Answer:

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Explanation:

Generally, a seismograph consists of a mass attached to a fixed base. During an earthquake, the base moves and the mass does not. The motion of the base with respect to the mass is commonly transformed into an electrical voltage. The electrical voltage is recorded on paper, magnetic tape, or another recording medium.