Is a cookie crumbling or in other words breaking a cookie a physical change?

The correct answer is 1.07m.

The area surrounding an electric charge where its impact may be felt is known as the electric field. When another charge enters the field, the presence of an electric field may be felt. The electric field will either attract or repel the charge depending on its makeup. Any electric charge has a property known as the electric field. The charge and electrical force working in the field determine the strength or intensity of the electric field.

Here, is the charge per unit length, r is the distance from the wire, and

is the free space permittivity  ε_0. Electric field due to the long straight wire is,

E= λ/2πε_0r

Rearrange the equation for r.

r=λ/2πε_0E

Substitute 2.41 N/C for E,

E=1.44×10^-10C/m

λ=8.85×10^-12C^2/Nm^2

r=(1.44×10^-10C/m)/(2(3.14)(8.85×10^-12C^2/Nm^2)(2.41N/C))

r=1.07m

At a distance of 1.07 m the magnitude of electric field is 2.41 N/C.

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ANSWER:

The current always choose low resistor to flow in circuit

STEP-BY-STEP EXPLANATION:

Gven:

V = 10 V

R1 = 250 Ω

R2 = 800 Ω

Apply Ohm's law:

We calculate the current in each case:

That means current always choose low resistor to flow in circuit

Because the acceleration caused by gravity affects escape velocity. Therefore, the moon's escape velocity must be lower than that of the earth. Moreover, due to a lower escape velocity.

Ve therefore equals 11.2 km/s x 103 m/s. On Mars, the escape speed is approximately 40,270 kmph, or 11,186 m/s. For instance, when a rocket is used to propel a spacecraft into orbit, the velocity obtained must be higher than the orbital speed to prevent the rocket from returning to Earth.

Escape velocity is indeed the bare minimum speed at which a body must be propelled in order to escape the earth's gravitational pull. The smallest speed at which an object must move in order to escape the gravity field is.

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Answer:

The magnetic field is   \(B = 3 mT\)

Explanation:

From the question we are told that

     The inner radius is  \(r_i = 1.00 mm =1*10^{-3} \ m\)

      The outer radius is  \(r_2 = 3.00 \ mm = 3.0 *10^{-3} \ m\)

       The distance from the axis of the conductor is \(d =2.0 \ mm = 2.0 *10^{-3} \ m\)

      The current carried by the conductor is  \(I = 80 A\)

According to Ampere's circuital law , the magnetic field at a point that is  \(r_3\)  from the axis of the conductor

                  \(B = \frac{\mu_oI}{2 \pi d } [\frac{d - r_1}{r_2 -r_1} ]\)

Where \(\mu_o\) is the permeability of free space with a value of \(\mu_o = 4 \pi *10^{-7} N/A^2\)

substituting values

                  \(B = \frac{(4 \pi *10^{-7})(80)}{2 * 3.142 * 2 *10^{=3} } [\frac{(2^2 - 1 ^2 )*10^{-3}}{(3^2 - 1^2) *10^{-3}} ]\)

                 \(B = 3 mT\)

Answer:

20 cm and 180° of angular displacement

Explanation:

In this case, the displacement of a tip in an one hand clock is always twice the length of the hand, therefore:

D = 2 * L

D = 2 * 10

D = 20 cm

Now, we should note that from 12:15 am to 12;45 pm, the clock covers around 12.5 revolutions, and from here can calculate the angular distance:

AD = 12.5 * 360° = 4500°

And the angular displacement (A data you need to complement the displacement of the tip), is half a revolution so, if a revolution covers 360 ° then:

α = 1/2 * 360 = 180°

Hope this helps

Answer:

0.2 J

Explanation:

Elastic potential energy of a spring is:

EE = ½ kx²

where k is the spring stiffness and x is the displacement.

EE = ½ (40 N/m) (0.1 m)²

EE = 0.2 J

The intrinsic brightness of a star can vary greatly from star to star, depending on factors such as its size, temperature, and age. These variations in intrinsic brightness are used to classify stars into different types or spectral classes, such as supergiants and dwarfs.

Based on what you know about the intrinsic brightness of stars, select all of the correct statements from the following list:
1. The intrinsic brightness of a star is also known as its absolute magnitude. This magnitude measures the actual amount of light that a star emits.
2. The intrinsic brightness of a star is independent of its distance from Earth. This means that even if a star is far away, its intrinsic brightness remains the same.
3. The intrinsic brightness of a star can be determined by measuring its apparent magnitude and knowing its distance from Earth. The apparent magnitude is how bright a star appears to us from Earth, while the distance is the actual physical distance between the star and Earth.
4. The intrinsic brightness of a star can be used to classify stars into different types or spectral classes. For example, stars with high intrinsic brightness are classified as "supergiants," while stars with low intrinsic brightness are classified as "dwarfs."
5. The intrinsic brightness of a star can vary greatly from star to star. Some stars are much brighter than others due to factors like their size, temperature, and age.
6. The intrinsic brightness of a star can be calculated using the formula: Intrinsic Brightness = (Apparent Brightness * 4π * (Distance)²) / (Luminosity Constant)
The intrinsic brightness of a star, also known as its absolute magnitude, is a measure of the actual amount of light that a star emits. It is important to note that the intrinsic brightness of a star is independent of its distance from Earth. This means that even if a star is far away, its intrinsic brightness remains the same.

However, in order to determine the intrinsic brightness of a star, we need to measure its apparent magnitude (how bright it appears to us from Earth) and know its distance from Earth. The apparent magnitude is measured on a logarithmic scale, with smaller numbers indicating brighter stars. By comparing the apparent magnitude and distance of a star, we can calculate its intrinsic brightness using the formula: Intrinsic Brightness = (Apparent Brightness * 4π * (Distance)²) / (Luminosity Constant).

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none of the options provided (4.3 × 10^10 N, 3.5 × 10^10 N, -5.4 × 10^10 N, -5.8 × 10^10 N) can be confirmed as the correct answer. The electrical force between q1 and q2 can be calculated using Coulomb's Law, which states that the electrical force between two charged objects is directly proportional to the product of their charges and inversely proportional to the square of the distance between them.

The formula for the electrical force  where: F is the electrical force between the charges, k is the electrostatic constant (8.99 × 10^9 N·m^2/C^2), q1 and q2 are the magnitudes of the charges, r is the distance between the charges. Given that the value of k is provided and the charges q1 and q2 are not given, it is not possible to determine the specific electrical force between q1 and q2 without additional information. Therefore, none of the options provided (4.3 × 10^10 N, 3.5 × 10^10 N, -5.4 × 10^10 N, -5.8 × 10^10 N) can be confirmed as the correct answer.

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(1) The ball is in the air for 1.4 seconds.

(2) The horizontal velocity of the ball as it rolls off the table is 6.32 m/s.

(3) The vertical velocity of the ball right before it hits the ground is 13.72 m/s.

(4) The horizontal velocity of the ball right before it hits the ground is 6.32 m/s.

(5) The initial vertical velocity as soon as the ball comes of the cliff is 13.72 m/s​.

The time of motion of the ball is calculated by applying the following equation.

t = √(2h/g)

where;

t =  √(2h/g)

t = √(2 x 9.63 / 9.8)

t = 1.4 seconds

The horizontal velocity of the ball is calculated as follows;

v = d/t

where;

v = 8.85 m / 1.4 s

v = 6.32 m/s

The vertical velocity of the ball before it hits the ground is calculated as;

vf = vi + gt

vf = 0 + 9.8 x 1.4

vf = 13.72 m/s

The horizontal velocity of the ball right before it hits the ground is calculated as;

the initial velocity of a projectile = final horizontal velocity

vxf = vxi = 6.32 m/s

The initial vertical velocity as soon as the ball comes off the cliff = final vertical velocity = 13.72 m/s

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When a boxer moves into an oncoming punch, the force experienced is (C) increased

The reason that moving into an oncoming punch increases the force experienced is due to the principles of momentum and force. When two objects collide, the total momentum of the system is conserved,

A boxer moving into an oncoming punch, the force experienced is increased. This is because the force of the punch is added to the force of the boxer's movement. When the boxer moves into the punch, the relative speed between the punch and the boxer is increased, which increases the momentum and thus the force of the impact.

In addition, moving into the punch can also reduce the distance over which the punch is applied, which further increases the force experienced.

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Answer:

c

Explanation:

The amount of mass used up in holding a nucleus together the mass defect represent.

Thus, The term "mass defect" refers to the discrepancy between the actual atomic mass and the expected mass obtained by multiplying the mass of the protons and neutrons in the nucleus by a constant factor.

The anticipated mass obtained by combining the masses of the nucleons is less than the actual atomic mass. The binding energy that is produced when a nucleus forms accounts for this extra mass.

The mass defect is a result of some of the mass being converted to energy during the formation of a nucleus. The real mass of an atomic nucleus is therefore less than the mass of the constituent particles.

Thus,  The amount of mass used up in holding a nucleus together the mass defect represent.

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Answer:

Therefore, when a light ray traveling through air enters water or glass it slows down, refracts, and bends toward the normal line. ... For example, when light goes from glass or water to air, it speeds up. Refraction changes how objects look.

Explanation:

The light slows down when it passes from the less dense air into the denser glass or water. This slowing down of the ray of light also causes the ray of light to change direction. It is the change in the speed of the light that causes refraction.

The light slows down when it passes from the less dense air into the denser glass or water. This slowing down of the ray of light also causes the ray of light to change direction. It is the change in the speed of the light that causes refraction.

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Answer:

solid

Explanation:

it's not liquid, nor gas, so solid.

Answer:

b

Explanation:

Answer:

they transfer energy

Explanation:

Answer: 115 N

Explanation:

In this case, the ball has a weight of 15 N (force due to gravity) acting on it and the cannon is shooting it with a force of 100 N.

To find the net force on the ball, we add the forces acting on it.

Net force = force due to gravity + force due to the cannon

Net force = 15 N + 100 N

Net force = 115 N

So, the net force on the ball will be 115 N. ✅

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The diffraction pattern of the hair appears in the horizontal direction that it does because the diffraction pattern of the hair appears in the horizontal direction due to the bending and spreading of light waves around the hair.

1. When light encounters an obstacle, such as a hair, diffraction occurs. Diffraction is the bending and spreading of light waves around the obstacle.
2. The hair acts as a single slit, allowing light to pass through the narrow gap around it.
3. As the light waves pass through this gap, they interfere with each other, causing constructive and destructive interference.
4. This interference results in a diffraction pattern that appears in the horizontal direction, which is perpendicular to the direction of the hair.
5. The pattern is characterized by a series of bright and dark bands, with the bright bands representing areas of constructive interference and the dark bands representing areas of destructive interference.
In conclusion, the diffraction pattern of the hair appears in the horizontal direction due to the bending and spreading of light waves around the hair, which causes interference patterns to form perpendicular to the direction of the hair.

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The amount of lateral strain in a tension member can be calculated using Poisson's ratio.

To calculate the lateral strain, we can use the equation: ε_lateral = -ν * ε_longitudinal

Where:

ε_lateral = Lateral strain

ν = Poisson's ratio

ε_longitudinal = Longitudinal strain

Poisson's ratio (ν) is a material property that describes the ratio of lateral strain to longitudinal strain when a material is subjected to an axial load. It is defined as the negative ratio of the transverse strain to the longitudinal strain.

Calculating the lateral strain involves determining the longitudinal strain, which can be calculated using the equation:ε_longitudinal = ΔL / L

Where:

ε_longitudinal = Longitudinal strain

ΔL = Change in length of the tension member

L = Original length of the tension member

Once the longitudinal strain is calculated, we can use Poisson's ratio to determine the lateral strain by multiplying the longitudinal strain by the negative value of Poisson's ratio.

It is important to note that the lateral strain is typically very small compared to the longitudinal strain in a tension member, especially for materials with a low Poisson's ratio.

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A parallel capacitor's geometrical characteristics determine its capacitance. the separation of the plates. The capacitance reduces as the distance between the plates grows.

Farad, denoted by the letter F, is the SI unit for electrical capacitance. In large part, the unit bears the name of English physicist Micheal Faraday. The capacity of a body or thing to hold an electrical charge is often referred to as farad. The SI base units used to describe it are s4A2m-2kg-1.

They are effective at lessening voltage pulsation. The capacitor is charged in a parallel circuit when a positive voltage is applied, and it discharges when a low voltage is applied. While most electronic circuits use DC, the electricity that comes out is AC.

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Answer: Change

Explanation:

Answer:

an open circuit (A battery, bulb, wire,switch)

Explanation:

the battery supplies the power the wire carries the current from the battery to the bulb but the circuit is not completed if the switch is not connected (Switch )

Answer:

636.4 J

Explanation:

The potential energy between one of the charges at the corner of the square and the fifth identical charge is U = kq²/r where q = charge = +50 × 10⁻⁶ C  and r = distance from center of square. = √2 m (since the midpoint of the sides = 1 m, so the distance from the charge at the corner to the center is thus √(1² + 1²) = √2)

Since we have four charges, the additional potential energy to move the charge to the centre of the square is U' = 4U = 4kq²/r

U' = 4kq²/r

= 4 × 9 × 10⁹ Nm²/C² (+50 × 10⁻⁶ C)²/√2 m

= 900 Nm²/√2 m

= 636.4 J

The total external energy required is 636.4 J.

According to the question, a square of side a = 2m has 4 identical charges on the corners with charge Q = 50×10⁻⁶C.

A fifth identical charge is brought at the geometric center of the square. The geometric center is at the center of the diagonal:

\(r=\frac{a}{\sqrt{2} }=\sqrt{2}\;m\)

The potential energy is a state function which means that it depends on the initial and final position.

Now the energy required is equal to the change in potential energy

\(\Delta U=\frac{1}{4\pi\epsilon_o}\frac{4Q^2}{r}\\\\\Delta U=\frac{4\times9\times10^9\times(50\times10^{-6})^2}{\sqrt{2} } \\\\\Delta U=636.4\;J\)

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To use all the energy from consuming a small order of french fries, the person would need to climb the 11.0 m stairway approximately 17.0 times.

The energy content of the small order of french fries is given as 241.0 Cal. We can convert this value to joules since the unit of energy in the metric system is the joule (J). 1 calorie (Cal) is equal to 4.184 joules (J). To use all the energy from consuming a small order of french fries, the person would need to climb the 11.0 m stairway approximately 57 times.

Energy content of the small order of french fries:

241.0 Cal × 4.184 J/Cal = 1007.144 J

Work done to climb the stairway:

(55.0 kg) × (11.0 m) × (9.8 m/s²) = 59294 J

Number of climbs needed to use all the energy:

1007.144 J ÷ 59294 J ≈ 17.0

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Answer:

I already know the first one is electromagnetic but I don't know the second one sorry

Explanation:

Answer:

Other than gravity, the most commonly encountered force is what or the force that resists motion.

friction

the ratio of the force necessary to move an object (or keep it moving) and the normal force

coefficient of friction

friction between a solid and a liquid or gas

drag

a force that resists motion

friction

the force that presses two surfaces together and is directed perpendicular to the contact surface; on a level surface, its magnitude is equal to the force of the object's weight but in the opposite direction

normal force

force that opposes a rolling object

rolling friction

force that opposes a sliding object

sliding or kinetic friction

force that opposes the start of motion

starting or static friction

a force that develops when a mass is accelerated by gravity; stated as Fw = mg

weight

Friction is a force that resists what

motion

It occurs when a surface in motion rubs against another what

surface

What acts parallel to the surfaces that are moving against one another and in the direction opposite to the direction of the motion (represented by F).

Friction

riction is caused by the interaction of the what or what of each object sliding over each other.

atom or molecules

he more contact the atoms are able to make, the greater the what

frictional effect

A what surface will produce more friction (resistance) than a smooth surface

rough surface

The high points on one surface interact with the high points on the other surface allowing atoms and molecules to form temporary what

intermolecular bonds

The more bonds that are allowed to form, the greater the what

friction

he force that opposes the start of motion is referred to as what

starting or static friction

This force is caused by the what that form between two surfaces

tiny bonds

The pull required to keep the block moving at a constant speed in the example above is due to what

sliding or kinetic friction

What occurs as tiny intermolecular bonds are constantly being formed and broken.

Sliding friction

Sliding friction is also affected by the weight of the object and another force called the what

normal force

What is the force of the contact surface pressing opposite the weight of the object, as seen in the diagram below.

normal force

The normal force is always perpendicular to the what

contact surface

The ratio between the sliding friction and the perpendicular normal force is called the what of sliding friction

coefficient

What is represented by the Greek letter mu, μ,

coefficient

he third type of friction that can exist between solid surfaces is what or the force that opposes a rolling object

rolling friction

Friction can also exist between what

solids liquids and gases

Gases and liquids, such as air and water, offer what

resistance to motion

the opposing force between a solid and a liquid or gas

drag

The equivalent measurement of 11.5 milliamperes is 11.5 x 10⁻³ amperes.

The rate of flow of charge per unit cross - sectional area is called electric current. Mathematically -

i = dq/dt

From this -

dq = i dt

∫dq = ∫i dt

Q = it

Current is measured in amperes and is a Tensor quantity.

Given is a circuit that measured a current of 11.5 milli amperes.

Now, the current in milli amperes is used to give the measurement of small amount of current. One milliampere of current is equivalent to -

1 mA = (1/1000) A = 10 ⁻³ A

So, in order to calculate the total current in amperes, we will multiply 11.5 milliamperes by 10 ⁻³ as follows -

11.5 milliamperes [mA] = 11.5 x 10⁻³ amperes[A]

Therefore, the equivalent measurement of 11.5 milliamperes is 11.5 x 10⁻³ amperes.

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If the command "bitor" is used to set the light pattern and bitSel(leds currentLED) is replaced with leds - 181 with LBSFIRST option still chosen for shiftout, the following LEDs will be turned on: QA, QB, QC, QD, QE, QF, QG, and QH.

Hi! In the lesson with Eight LEDs using 74HC595 shift register, you are aiming to control 8 LEDs with a single data pin. The 74HC595 is an 8-bit serial-in, parallel-out shift register, which allows you to extend the number of outputs using fewer pins on a microcontroller.

In your code, you are replacing "bitSel(leds, currentLED)" with "leds - 181" while keeping the LBSFIRST option for shiftOut. This change affects the pattern of LEDs that will be lit up.

The 74HC595's outputs are labeled QA, QB, QC, QD, QE, QF, QG, and QH. When you replace the code, it sets the value of "leds" to 181. The binary representation of 181 is 10110101. So, the LED pattern would be:

QA: 1 (ON)
QB: 0 (OFF)
QC: 1 (ON)
QD: 1 (ON)
QE: 0 (OFF)
QF: 1 (ON)
QG: 0 (OFF)
QH: 1 (ON)

This means that LEDs QA, QC, QD, QF, and QH will be turned on, while LEDs QB, QE, and QG will remain off.

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Answer:

Gravitational Energy

The net torque is zero in order for the seesaw to balance despite Marci and Juan having different masses.

Torque is the rotational force that causes an object to rotate. In a balanced seesaw, the net torque must be zero, meaning the clockwise and counterclockwise torques are equal. This is necessary for equilibrium.

When Marci and Juan have different masses, the seesaw can still balance if they adjust their positions. The torque generated by each person depends not only on their mass but also on their distance from the fulcrum (pivot point). By adjusting their positions, they can achieve equilibrium by ensuring the torques on both sides of the fulcrum cancel each other out, resulting in a net torque of zero. This allows the seesaw to remain balanced.

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