What would scientists using classical, Newtonian physics expect to observe
during the photoelectric effect?
A. That enough light of any frequency would cause electrons to flow
O B. That light above a certain frequency would not cause electrons to
flow
O C. That no light would cause electrons to flow
O D. That light below a certain frequency would not cause electrons to
flow

Answer:

the bag DOES NOT BREAK,  F = 59 N

Explanation:

For this exercise, let's use Newton's second law, let's set a reference frame with the positive direction up

           F -W = m a

the mass of the groceries is m = 5 kg, the weight is

           W = m g

indicate the acceleration a = 2 m / s², let's find the force

          F = mg + ma

          F = m (g + a)

let's calculate

          F = 5 (9.8 + 2)

          F = 59 N

          F <65 N

as the force with which it pulls the bag less than the breaking force the bag DOES NOT BREAK

if you increase the pressure on a sprinkler nozzle from 46 psi to 66 psi, the new flow rate will be approximately 32.496 gallons per minute, assuming a flow rate coefficient (K) of 4.0.

Q = K * √(P)

where sqrt(P) is the square root of the pressure in psi.

Using this formula, we can calculate the new flow rate as follows:

New flow rate = 4.0 * √(66) = 4.0 * 8.124 = 32.496 gallons per minute (approx.)

Pressure is a physical quantity that describes the force exerted per unit area. It can be defined as the amount of force applied to a given area or surface. Pressure is typically measured in units of Pascals (Pa), which is equivalent to one Newton per square meter (N/m²).

Pressure can be exerted by any type of matter, including gases, liquids, and solids. For example, the pressure of the air around us is the result of the weight of the atmosphere pushing down on the surface of the Earth. In general, pressure increases with increasing depth in a fluid or with increasing force applied to a surface. It also varies with temperature and can be affected by the properties of the material being measured.

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Answer:

Im pretty sure its kingdom

Explanation:

I have a test with the same question and I got it right putting the answer as kingdom.

Answer:

It helps planet earth to survive

Explanation:

Although much less abundant than nitrogen and oxygen in Earth's atmosphere, carbon dioxide is an important constituent of our planet's air. A molecule of carbon dioxide (CO 2) is made up of one carbon atom and two oxygen atoms. Carbon dioxide is an important greenhouse gas that helps to trap heat in our atmosphere.

Answer:

convection

Explanation:

Convection is a mode of heat transfer in which the molecules near the heat source get heated up, expand, become less dense, and rise upwards. The cooler molecules, on the other hand, sink to the bottom and are eventually heated up. Thus the transmission of heat by the movement of heated particles is called convection.

ANSWER:

500 J

STEP-BY-STEP EXPLANATION:

Given:

Mass of object = 10 kg

Speed = 10 m/s

The kinetic energy is calculated using the following formula:

The kinetic energy is 500 J.

The magnetic field magnitude, Bf, is 2.5 T.

Given,A current loop having area A=4.0m² is moving in a non-uniform magnetic field as shown. In 5.0s it moves from an area having magnetic field magnitude Bi=0.20T to having a greater magnitude Bf. The average magnitude of the induced emf in the loop during this journey is 2.0 V. We have to find Bf.

The formula for the average magnitude of the induced emf in the loop is:

Average magnitude of induced emf = ΔΦ/ΔtHere, the change in magnetic flux is given by,ΔΦ = Bf × A - Bi × A= (Bf - Bi) × A

Also, time duration of the journey, Δt = 5.0 s

Therefore, the above formula can be rewritten as,2 = (Bf - 0.20) × 4.0/5.0

Simplifying the above equation for Bf, we get,Bf = (2 × 5.0/4.0) + 0.20= 2.5 V

The magnetic field magnitude, Bf, is 2.5 T.

The answer is, Bf = 2.5T

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Light reflecting off an object in the environment follows a path that enters the eye and travels through the cornea, pupil, and lens, which help to focus the light onto the retina. The photoreceptors, including the rods and cones, then detect the light and convert it into electrical signals that are transmitted to the brain via the optic nerve.

Photoreceptors detect light reflecting off an object in the environment after the light enters the eye and travels through several structures. The cornea, pupil, and lens help to focus the light onto the retina, where the photoreceptors are located. The rods and cones, which are types of photoreceptors, then convert the light into electrical signals that can be processed by the brain. These signals are transmitted via the optic nerve, which connects the eye to the brain. The brain then interprets the signals to create a visual image of the object that reflected the light.

In conclusion, the path that light follows as it reflects off an object in the environment and is detected by photoreceptors involves several structures within the eye, including the cornea, pupil, lens, and retina. The photoreceptors then convert the light into electrical signals that are transmitted to the brain via the optic nerve. This process ultimately results in the brain creating a visual image of the object.

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It is same for both the balls. Due to the fact that balls fall freely regardless of their weight, both metallic balls take the same amount of time to reach the ground.

When two identically sized objects are dropped from a certain height, they will fall with gravitational acceleration (g). The weight of the objects will not affect how long it takes them to reach the ground. The density of the medium in which an object is dropped affects how long it takes for each object to travel there. Due to the influence of gravity and the same medium, we can therefore infer that both metal balls will take the same amount of time to reach the ground (air). Experiments have been conducted in vacuum rooms and show that when the balls are released from the top of the store, the acceleration of attraction to the floor is gravity and it has a value of 9.8 meters/square second regardless of its weight.

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True, the destroyactor function must be used to destroy a particle system.

The destroyactor function is a method that is used to remove an actor or object from a scene in programming. In the context of particle systems, when you want to remove a particle system from your scene, you need to use the destroyactor function. This function will effectively destroy the particle system and remove it from memory, freeing up resources.

It is important to properly destroy particle systems when they are no longer needed to prevent memory leaks and optimize performance. Therefore, the statement that the destroyactor function must be used to destroy a particle system is true.

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Answer:

h

Explanation:

Coulomb's law, or Coulomb's inverse-square law, is an experimental law[1] of physics that quantifies the amount of force between two stationary, electrically charged particles. The electric force between charged bodies at rest is conventionally called electrostatic force or Coulomb force.[2] The law was first discovered in 1785 by French physicist Charles-Augustin de Coulomb, hence the name. Coulomb's law was essential to the development of the theory of electromagnetism, maybe even its starting point,[1] as it made it possible to discuss the quantity of electric charge in a meaningful way.[3]

The law states that the magnitude of the electrostatic force of attraction or repulsion between two point charges is directly proportional to the product of the magnitudes of charges and inversely proportional to the square of the distance between them,[4]

{\displaystyle F=k_{\text{e}}{\frac {q_{1}q_{2}}{r^{2}}}}{\displaystyle F=k_{\text{e}}{\frac {q_{1}q_{2}}{r^{2}}}}

Here, ke is Coulomb's constant (ke ≈ 8.988×109 N⋅m2⋅C−2),[1] q1 and q2 are the signed magnitudes of the charges, and the scalar r is the distance between the charges.

The force is along the straight line joining the two charges. If the charges have the same sign, the electrostatic force between them is repulsive; if they have different signs, the force between them is attractive.

Being an inverse-square law, the law is analogous to Isaac Newton's inverse-square law of universal gravitation, but gravitational forces are always attractive, while electrostatic forces can be attractive or repulsive.[2] Coulomb's law can be used to derive Gauss's law, and vice versa. In the case of a single stationary point charge, the two laws are equivalent, expressing the same physical law in different ways.[5] The law has been tested extensively, and observations have upheld the law on the scale from 10−16 m to 108 m.[5]

The acceleration experienced by the crate is approximately 0.844 m/s

Weight of the crate:

Weight = mass × acceleration due to gravity

Weight = 114 kg × 10 m/s^2

Weight = 1140 N

Force of friction:

Force of Friction = coefficient of friction × normal force

Force of Friction = 0.541 × 1140 N

Force of Friction ≈ 616.74 N

Net force:

Net Force = Applied Force - Force of Friction

Net Force = 713 N - 616.74 N

Net Force ≈ 96.26 N

Acceleration:

Acceleration = Net Force / mass

Acceleration = 96.26 N / 114 kg

Acceleration ≈ 0.844 m/s

Therefore, the acceleration experienced by the crate is approximately 0.844 m/s

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Answer:

all of these

Explanation:

Answer:

D.all of there

Explanation:

Answer:

It ,means, the mercury rises to 13.6 cm in the barometer.

Explanation:

Given that,

The statement'  Pressure of gas is 13.6cm of Hg'.

We know that,

(I). The pressure is equal to the force upon area.

(II). The gas pressure is the real force which is applied on the  walls of container by the gas.

(III). The gas pressure is measured by barometer.

(IV). The standard atmospheric pressure is 760 mm of Hg and the density of Hg is 13.6 cm.

It means, when  the pressure exerted on the wall then the mercury rises to 13.6 cm in the barometer

Hence, It ,means, the mercury rises to 13.6 cm in the barometer.

Answer:

Infrared

Explanation:

Infrared radiation is the form of light that is invisible to eye but can be felt as warmth.

Electromagnetic radiation has gamma rays, ultraviolet rays, x- rays , visible light and infrared radiation, etc.

The heated surface usually emits infrared radiations .They form a continuous spectrum.

Infra red radiation are used in different processes such as heat sensors, thermal imaging and night vision equipment.

Broadly they can be divided into three group near, middle and long infrared radiations.

These radiations can be seen with the eyes with special equipment or under certain conditions.

Answer:

b

Explanation:

because the metalloids are the thing in the middle

Answer:

Yes, it is correct : )

Explanation:

Hope this helps!

Answer:

yes, this is correct.

Explanation:

Answer:

True

Explanation:

1 cycle every 5 sec is the same when you set up the ratio as 1/5

Hope this helps!! Have a great day!!      :)

Answer:

C voltage

Explanation:

Voltage is the change in electric potential so basically current flows from high potential to low potential due to voltage.

6.21 cm

where

Given:

solving step-wise:

\(\dashrightarrow \mathrm{T}=2 \pi \sqrt{\dfrac{\mathrm{L}}{\mathrm{g}}}\)

\(\sf \dashrightarrow \mathrm{0.5}=2 \pi \sqrt{\dfrac{\mathrm{L}}{\mathrm{9.8}}}\)

\(\dashrightarrow \mathrm{\dfrac{0.5}{2 \pi } }=\sqrt{\dfrac{\mathrm{L}}{\mathrm{9.8}}}\)

\(\dashrightarrow\sqrt{\dfrac{\mathrm{L}}{\mathrm{9.8}}}= \mathrm{\dfrac{0.5}{2 \pi } }\)

\(\sf \dashrightarrow{\dfrac{\mathrm{L}}{\mathrm{9.8}}}= (\mathrm{\dfrac{0.5}{2 \pi } })^2\)

\(\sf \dashrightarrow{{\mathrm{L}}= (\mathrm{\dfrac{0.5}{2 \pi } })^2*9.8\)

\(\sf \dashrightarrow{{\mathrm{L}}=0.06205922 \ m\)

\(\sf \dashrightarrow{{\mathrm{L}}=6.2059\ cm\)

\(\sf \dashrightarrow{{\mathrm{L}}=6.21\ cm\)             { rounded to nearest hundredth }

Let's see

\(\\ \rm\rightarrowtail T=2\pi \sqrt{\dfrac{l}{g}}\)

\(\\ \rm\rightarrowtail 0.5=2\pi \sqrt{\dfrac{l}{9.8}}\)

\(\\ \rm\rightarrowtail 0.783=\pi \sqrt{l}\)

\(\\ \rm\rightarrowtail 0.2494=\sqrt{l}\)

\(\\ \rm\rightarrowtail \ell=0.0622m\)

Answer:

Explanation:

Given:

r₁ = 0.2 cm = 0.002 m

σ = 75·10⁻³ N·m

______________

ΔE - ?

The volume of one small drop:

V₁ = (4/3)·π·r³ = (4/3)·3.14·0.002³ ≈ 3.35·10⁻⁸ m³

Large drop volume:

V = 2·V₁ = 2·3.35·10⁻⁸ = 6.70·10⁻⁸ m³

V = (4/3)·π·R³

Big drop radius:

R = ∛ (3·V / (4·π)) = ∛ (3·6.70·10⁻⁸  / (4·3.14) ) ≈ 0.0025 m

Surface area of a large drop:

 S = 4·π·R² = 4·3.14·0.0025² ≈ 78.5·10⁻⁶ m²

Surface area of a small drop:

S₁ = 4·π·r₁² = 4·3.14·0.002² = 50.2·10⁻⁶ m²

S₂ = 2·S₁ = 100.4·10⁻⁶ m²

ΔS = S₂ - S₁ = (100.4 - 78.5)·10⁻⁶ m² = 21.9·10⁻⁶ m²

Energy change:

ΔE = σ·ΔS = 75·10⁻³·21.9·10⁻⁶ ≈ 1.64·10⁻⁶ J

The ball is at its lowest point, which means that the tension in the string is greater than the ball's weight.

Tension is defined as the force in a stretched object that is pulling against the force that is causing the stretch. The magnitude of the force that is pulling on an object is the tension in the object.

The tension in a string is the force that is pulling on the string. When the string is pulled, the tension increases. The tension in a string depends on the force that is pulling on the string.

The weight of the ball is the force that is pulling on the string. When the ball is at its lowest point, the tension in the string is greater than the ball's weight.

This is because the force of gravity pulling down on the ball is greater than the tension in the string which is causing the ball to move up.

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Answer: Air

Explanation:

Roffns dn b bdd

Explanation:

a. Determine Luna's average speed.

Luna's Speed: 8.22 m/s

b. Determine Gianna's average speed.

Gianna's Speed: 4.90 m/s

c. How many times faster is Luna's speed?

Luna's Speed is 1.67 times faster

d. Who won the bet?

Luna won the bet.

To determine Luna's average speed, divide distance by time. Luna's speed is 8.23 m/s. Gianna's speed is 4.94 m/s. Luna's speed is 1.66 times faster than Gianna's.

To determine Luna's average speed, we need to divide the total distance of 440 meters by her total time of 53.4 seconds. Dividing the two gives us her average speed of 8.23 m/s.

To determine Gianna's average speed, we follow the same process. We divide the total distance of 440 meters by her total time of 89.1 seconds. This gives us her average speed of 4.94 m/s.

To find out how many times faster Luna's speed is compared to Gianna's, we divide Luna's speed by Gianna's speed. So, 8.23 / 4.94 = 1.66. This means Luna's speed is 1.66 times faster than Gianna's.

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The given statement "As a wave begins to feel bottom near a shoreline, its wave height: increases and wavelength decreases." is true.

As a wave approaches the shoreline, it starts to feel the bottom due to decreasing water depth. When this happens, the wave's speed decreases, causing the wavelength to decrease as well. As the wavelength decreases, the wave height increases, and the wave becomes steeper. Eventually, the wave breaks near the shoreline.

A wave is a dynamic disturbance of one or more quantities that propagates through time. When waves oscillate frequently around an equilibrium value at a certain frequency, they are said to be periodic.

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Joules, volts, and electron volts (eV) are units used to measure different types of physical quantities related to energy and electricity.

Joules (J) measure energy, which can be in various forms such as potential, kinetic, or thermal energy. It is a derived unit in the International System of Units (SI) and is defined as the amount of work done when a force of one newton displaces an object by one meter in the direction of the force.Volts (V) measure electric potential difference, also known as voltage, between two points in an electric circuit. It indicates the amount of work needed to move a unit of electric charge between these points. One volt is equivalent to one joule of energy per coulomb of charge.Electron volts (eV) measure energy on a smaller scale, typically at the atomic or subatomic level. It is the amount of kinetic energy gained or lost by a single electron when it is accelerated through an electric potential difference of one volt. It is commonly used in particle physics and quantum mechanics to express the energies of particles, atoms, and other small-scale phenomena.In summary, joules measure energy, volts measure electric potential difference, and electron volts measure energy on a smaller scale, particularly for atomic and subatomic particles.

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A) The resistance (R) in the LR circuit is approximately 0.156 ohms. B) the inductance (L) in the LR circuit is approximately 2.1 mH.

a) To find the resistance (R) in an LR circuit where the current falls to 50% of its initial value in 0.09 seconds, we can use the formula for the time constant (τ) of an LR circuit: τ = L / R

Given: L = 14 mH (convert to H: 14 × 10⁻³ H)

Δt = 0.09 s

The time constant (τ) is the time it takes for the current to reach approximately 63.2% of its initial or final value. In this case, the current falls to 50% of its initial value, so we can assume it is approximately one time constant (τ).

Since τ = L / R, we can rearrange the equation to solve for R: R = L / τ

R = (14 × 10⁻³)) / 0.09

R = 0.156 ohms

Therefore, the resistance (R) in the LR circuit is approximately 0.156 ohms.

b) To find the inductance (L) in an LR circuit where the current rises to 40% of its final value in 0.07 seconds, we can use the formula for the time constant (τ) of an LR circuit: τ = L / R

Given:

R = 30 ohms

Δt = 0.07 s

The time constant (τ) is the time it takes for the current to reach approximately 63.2% of its initial or final value. In this case, the current rises to 40% of its final value, so we can assume it is approximately one time constant (τ).

Since τ = L / R, we can rearrange the equation to solve for L: L = R × τ

L = 30 × 0.07

L = 2.1 H (convert to mH: 2.1 × 10³ mH)

Therefore, the inductance (L) in the LR circuit is approximately 2.1 mH.

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Answer:

false I believe is the right answer

Answer:

True

Explanation: