A balloon is rubbed against a sweater. Which of the following describes the result of this interaction?(1 point)

The outer shell electrons move from the balloon to the sweater.

The fibers of the sweater lose electrons.

The balloon becomes positively charged.

The free electrons in the balloon decreases.

The iris diaphragm is a part of the microscope that controls the amount of light that enters the microscope. It is located just above the condenser and can be adjusted to increase or decrease the amount of light that passes through the specimen. By adjusting the iris diaphragm, you can control the contrast and brightness of the image.

The substage condenser is another part of the microscope that is located just below the stage. Its function is to focus the light from the light source onto the specimen. By adjusting the height and position of the substage condenser, you can improve the resolution and clarity of the image. It also helps to reduce glare and improve contrast by directing the light through the specimen in a more controlled manner.

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The force needed to start the crate sliding on a wooden floor when the coefficient of static friction is 0.40 is 7206.4 N. To find the force needed to start the crate sliding, we need to calculate the maximum force of static friction that can act on the crate.

This is given by the formula Fstatic = μs N where Fstatic is the maximum force of static friction, μs is the coefficient of static friction, and N is the normal force acting on the crate. The normal force is equal to the weight of the crate, which is given as 18016 N. Therefore, we can substitute these values into the formula:

Fstatic = 0.40 × 18016 N
Fstatic = 7206.4 N

This means that a force of 7206.4 N is needed to start the crate sliding on the wooden floor. If a force greater than this is applied, the crate will start to slide. Therefore, the force needed to start the crate sliding on a wooden floor is 7206.4 N.

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1. The change in the kinetic energy of the system is given by the expression ΔKE = 1/2 * m * (vf^2 - 0^2) = 1/2 * m * vf^2, where m is the mass of the ball and vf is its final velocity. The change in potential energy of the system is given by the expression ΔPE = m * g * (hi - hf), where g is the acceleration due to gravity near the surface of the Earth (approximately 9.8 m/s^2).

The net external work by external forces on the system is zero, since the only force acting on the ball is the force of gravity, which is a conservative force and does not do any work on the ball.

Using the conservation of energy principle, we can write the equation ΔKE + ΔPE = 0, which implies that 1/2 * m * vf^2 + m * g * (hi - hf) = 0. Solving for vf, we get vf = √(2gh), where h = hi - hf is the height from which the ball falls. This is the final speed of the ball when it reaches height hf near the surface of the Earth, assuming no air resistance and negligible changes in kinetic energy of the Earth.

Let's write expressions for each quantity using the given terms and physical constants:

1. The change in kinetic energy of the system (the ball and the Earth):
ΔKE = ½mvf² - ½m(0)² = ½mvf²

2. The change in potential energy of the system:
ΔPE = mghf - mghi = mg(hf - hi)

3. The net external work by external forces on the system:
Since there is no air resistance and changes in Earth's kinetic energy are negligible, the net external work is zero.
W_ext = 0

4. Now, let's write an equation that relates the expressions above and use it to solve for the final speed of the ball. We'll use the work-energy theorem:
W_ext = ΔKE + ΔPE

Since W_ext = 0, we can rewrite the equation as:
0 = ½mvf² + mg(hf - hi)

To solve for vf, rearrange the equation:
½mvf² = -mg(hf - hi)
vf² = -2g(hf - hi)
vf = sqrt(-2g(hf - hi))

So, the final speed of the ball is given by the expression:
vf = sqrt(-2g(hf - hi))

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Rounding off to two significant figures, the work that must be done on the proton is approximately 1.0 nJ.

The work done on a particle is given by the equation:

W = ∆K = (γm₀c² - m₀c²)

where γ = (1 - v²/c²)⁻¹/² is the Lorentz factor, m₀ is the rest mass of the proton, c is the speed of light, and v is the final speed of the proton.

Given that the proton is initially at rest, its initial kinetic energy is zero, and the work done on it is equal to its final kinetic energy. Therefore, we can simplify the equation as follows:

W = (γm₀c² - m₀c²) = [(1 - v²/c²)⁻¹/² - 1]m₀c²

Substituting the values, we get:

W = [(1 - 0.92²/1²)⁻¹/² - 1](1.67 x 10⁻²⁷ kg)(3.00 x 10⁸ m/s)²

W ≈ 1.0 x 10⁻⁹ J

Rounding off to two significant figures, the work that must be done on the proton is approximately 1.0 nJ.

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Answer:

d. the rate at which work is accomplished.

Explanation:

The SI unit for Power is Joules

The net electric field at point D is determined as 3.95 x 10⁷ N/C.

E = kq/r²

where;

E(AD) = (9 x 10⁹ x 6 x 10⁻⁶)/(0.05²)

E(AD) = 2.16 x 10⁷ i N/C

E = kq/r²

where;

r² = 5²  + 5²

r² = 50

r = √50

r = 7.07 cm

E(BD) = (9 x 10⁹ x 5 x 10⁻⁶)/(0.0707²)

E(BD) = 9 x 10⁶ N/C

in x - direction = 9 x 10⁶ N/C x cos(45) = 6.36 x 10⁶ i  N/C

in y - direction = 9 x 10⁶ N/C x sin(45) = 6.36 x 10⁶j  N/C

E = kq/r²

where;

E(CD) = (9 x 10⁹ x 6 x 10⁻⁶)/(0.05²)

E(CD) = 2.16 x 10⁷ j N/C

Ei = 2.16 x 10⁷ i N/C  + 6.36 x 10⁶ i  N/C

Ei = 2.796 x 10⁷ i N/C

Ej = 2.16 x 10⁷ j N/C  + 6.36 x 10⁶j  N/C

Ej = 2.796 x 10⁷ j N/C

E = √Ei² + Ej²

E = √[(2.796 x 10⁷)² + (2.796 x 10⁷)²]

E = 3.95 x 10⁷ N/C

Thus, the net electric field at point D is determined as 3.95 x 10⁷ N/C.

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Answer:

First, let’s correct the question. Acceleration is the rate of change in velocity. Its unit therefore is ft/sec/sec. If S is the distance traveled for a given duration, S = Vot + (1/2)at^2 where Vo is the initial velocity, a is the acceleration and t is the time. For Vo = 0, a = 6m/sec/sec and t = 3 sec. The distance traveled is S = 0 + (1/2) x 6 x 3^2 = 27 meters

Answer:

4km

Explanation:

Distance=speed x time

Knowing this we know the time and speed

so it is 8 x .5= D

And 8 x .5 =4

If you have any questions let me know

the type of function that describes the amplitude of damped oscillatory motion is sinusoidal.

The largest distance a body can travel from its equilibrium positions during oscillation is known as the amplitude of the oscillation.It is the separation between the wave's crest / trough and its mean location.A sound wave's amplitude determines how loud it will be; the larger the amplitude, the louder the sound.

An oscillation that dissipates over time is referred to as a damped oscillation.A weight on a spring, a swinging pendulum, and a resistor-inductor-capacitor (RLC) circuit are a few examples.

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Answer:

B. chromosphere

Explanation:

Immediately above the Sun's photosphere is the _______, which is the Sun's lower atmosphere. A. core B. chromosphere C. corona D. solar wind

Answer:

we can incinerate waste materials and use the product as fuel rather than dumping them. It may produce carbon dioxide but we can create a machine that can convert carbon into energy.

The maximum speed the car can have and still make the turn successfully can be calculated using the centripetal force equation and the maximum frictional force that can be exerted between the tires and the pavement.

The centripetal force equation is Fc = (mv^2)/r, where Fc is the centripetal force, m is the mass of the car, v is its speed, and r is the radius of the curve.

The maximum frictional force that can be exerted between the tires and the pavement is given by the equation Ff = μN, where μ is the coefficient of static friction and N is the normal force.

At the maximum speed, the centripetal force must be equal to the maximum frictional force, so we have:

Fc = Ff

(mv^2)/r = μN

The normal force N is equal to the weight of the car, which is given by N = mg, where g is the acceleration due to gravity.

Substituting N and rearranging, we get:

v = sqrt(μgr)

Plugging in the given values, we get:

v = sqrt(0.500 x 9.81 m/s^2 x 20.0 m)

v = 20.0 m/s

Therefore, the maximum speed the car can have and still make the turn successfully is 20.0 m/s.

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Answer:

Y

Explanation:

The fulcrum is the point where the scissor blades are joined together. The force or effort is the end or handle of the scissors. The parts of a pair of pliers are similar to the scissors.

(1) The wavelength of the wave is 1.57 m.

(2) The velocity of the wave is 30 m/s .

(3) The frequency of the wave is 19.10 Hz and the time period of the    wave is 0.052 s.

Note: The given equation seems to be incomplete. Most probably the equation was y=25sin(120t-4x). And the standard system of units (i.e. kg, m, s) is used.

Wavelength: The distance between the consecutive crest or trough of a wave is called the wavelength of a wave.

The equation of a plane wave oscillating in the y direction and traveling in the x direction is given by the equation,

y=A sin(ωt-kx)

where y is the displacement along the y direction, A is the amplitude of the wave, ω is the angular frequency, t is the time, x is the displacement along the x direction, and k is the wave constant.

The given equation is,

y=25sin(120t-4x)

Comparing this equation with the above equation, following values are obtained.

k= 4 m^(-1)

ω =120 rad/s

A=25

The wavelength λ is given by the formula,

λ=2π/k

Here k = 4 m^(-1), so

λ=2π/4

λ=1.57 m.

Velocity: The velocity of a wave is the product of the frequency and the wavelength.

The velocity v is given by the formula,

v=ω*λ/2π

Here ω=120 rad/s and λ=1.57 m, so

v=120*1.57/2π

v=30 m/s

Frequency: The number of oscillations completed in one second is called the frequency of a wave.

The formula of the frequency is,

f=v/λ

Here v=30 m/s and λ=1.57 m, so

f=30/1.57

f=19.10 Hz

Time period: The time taken to complete one cycle of oscillation is called the time period of oscillation.

The formula to calculate the time period T is,

T=2π/ω

Here ω=120 rad/s, so

T=2π/120

T=0.052 s.

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Answer:

It's ellipticals!!

Explanation:

hope its right

Answer: The statement when the motion energy of an object changes, energy is being transferred is true.

Explanation:

Motion energy is also called mechanical energy and it is the summation of kinetic energy and potential energy stored in an object required for work.

As kinetic energy is the energy acquired due to motion of an object and potential energy is the energy acquired by an object due to its position.

For example, when a moving ball strikes another ball causing it to move then energy is being transferred from one ball to another.

Therefore, the statement when the motion energy of an object changes, energy is being transferred is true.

Answer:

Apply glue to one side of a layer of arch (segments) and place the next player on top. Screw them together while the glue dries. Add glue the top of these two laminated arch layers and then add one more layer, screwing it afterwards. Repeat this to make as many arches as you need (or have wood for).

Explanation:

According to Einstein's famous equation, the mass of a 32He nucleus is less than the sum of the masses of a 1H and a 2H nucleus.

A nucleus is the center portion of an atom that is kept together by the strong nuclear force and includes protons and neutrons. An atom's nucleus makes up the majority of its mass yet takes up a very little amount of its volume.

Einstein's famous formula E=mc2, which connects mass and energy, may be used to determine the mass of a 32He nucleus as well as the total of the masses of a 1H and a 2H nucleus, when they are apart from one another.

Atomic mass units (amu) may be used to find the nuclei's masses, which can then be translated to kilograms (kg) using the equation.

A 32He nucleus has a mass of 4.0026 amu, or 6.6465 x 10-27 kg.

A single 1H nucleus has a mass of 1.0078 amu, or 1.6737 x 10-27 kg.

A 2H nucleus has a mass of 2.0141 amu, which is 3.3431 x 10-27 kg.

The combined masses of the 1H and 2H nuclei are:

2.3431 x 10–27 kg plus 1.6737 x 10–27 kg equals 5.0168 x 10–27 kg.

As the fusing of hydrogen nuclei to generate helium loses energy in the form of radiation, according to Einstein's famous equation, the mass of a 32He nucleus is thus somewhat less than the sum of the masses of a 1H and a 2H nucleus.

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Answer:

s=d/t

s=30km

_____

20km/40km

s=30/2

s=15

Answer:

Explanation:

Answer:

Earth receives the perfect amount of heat and light that allow life to flourish

The eat in the bowl of soup placed on the surface of a stovetop, is most likely transmitted by C. convection and conduction.

Convection is the transfer of heat through a fluid (liquid or gas) by the movement of molecules. As the soup heats up, the molecules at the bottom of the bowl become more energetic and move faster.

Conduction is the transfer of heat through direct contact. As the bottom of the bowl heats up, the heat is conducted through the metal of the bowl and into the soup. The soup then conducts the heat throughout its volume.

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Options are:

Convection only

Radiation only

Convection and conduction

Radiation and conduction

Answer:

dang, you are really trying to get everyone to do your heavy lifting lol.

I'll do coal. and maybe a little more.

Explanation:

Coal What is it?

Coal is a combustible black or brownish-black sedimentary rock, formed as rock strata called coal seams. Coal is mostly carbon with variable amounts of other elements; chiefly hydrogen, sulfur, oxygen, and nitrogen.

Coal How we obtain it:

Coal can be extracted from the earth either by surface mining or underground mining. Once coal has been extracted, it can be used directly (for heating and industrial processes) or to fuel power plants for electricity. If coal is less than 61 meters (200 feet) underground, it can be extracted through surface mining.

Coal Pros:

Coal is plentiful in many places and it is easy to access through mining, so people rely on it to produce energy. Coal is easy to store. Once it is mined it can be safely stored with no hazard of fire or explosion like there is with gas or oil. It is relatively easy and inexpensive to convert coal into energy.

Coal Cons:

Coal is nonrenewable.  Coal contains the most CO2 per BTU, the largest contributor to global warming.  Severe environmental, social, and health, and safety impacts of coal mining.  The devastation of the environment around coal mines is heavy.  High cost of transporting coal to centralized power plants. Coal is really dirty and not good.

__________________________________________________________

Solar What is it?

Solar energy is radiant light and heat from the Sun that is harnessed using a range of ever-evolving technologies such as solar heating, photovoltaics, solar thermal energy, solar architecture, molten salt power plants and artificial photosynthesis.

Solar How we obtain it:

Solar technologies convert sunlight into electrical energy either through photovoltaic (PV) panels or through mirrors that concentrate solar radiation. This energy can be used to generate electricity or be stored in batteries or thermal storage.

Solar Pros:

It's clean energy. Solar power is pollution-free and causes no greenhouse gases to be emitted after installation.  It has reduced dependence on foreign oil and fossil fuels.  It is renewable clean power that is available every day of the year, even cloudy days produce some power.  It gives a return on investment unlike paying for utility bills.

Solar Cons:

Solar doesn't work at night. Solar panels are not attractive. You can't install a home solar system yourself. My roof isn't right for solar. Solar hurts the environment. Not all solar panels are high quality.

The net force on the box perpendicular to the floor is

∑ F[perp] = F[normal] - mg = 0

where mg is the weight of the box. Then

F[normal] = mg = 147 N

so that

F[friction] = 0.3 F[normal] = 44.1 N

The net force parallel to the floor is

∑ F[para] = F[applied] - F[friction] = ma

where a is the acceleration of the box. Then

F[applied] = (15 kg) a + 44.1 N

Then the work done by the applied force is

W[applied] = ((15 kg) a + 44.1 N) (1 m) = (15a + 44.1) J

We can't find the exact amount of work without any more information. If the box is pulled with constant speed, then a = 0 so the work would be 44.1 J.

The given statement "the electric field inside the conductor of the coaxial sheath is zero" is true.

Hence, the correct option is true.

What is the electric field inside the conductor of the coaxial sheath? In a coaxial cable, the electric field inside the conductor of the coaxial sheath is zero. The coaxial cable has a core conductor, a dielectric insulator, and a surrounding shield conductor. Coaxial cables are used in a variety of applications, including computer networking, video surveillance systems, and other applications.

Coaxial cables have the capacity to carry high-frequency electrical signals with low loss. In a coaxial cable, the electric field inside the conductor of the coaxial sheath is zero. Because of the shielding effect of the outer conductor or shield, the electric field is effectively confined to the space between the center conductor and the shield conductor.

This makes the coaxial cable an ideal transmission medium for high-frequency signals, as the signal is protected from interference and noise caused by external electrical sources.

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Magnetic field lines point leave north poles and enter south poles.

This is referred to as the direction that a small compass points when placed at a location.

They are closed curves which runs from the north pole and enters the south pole thereby making it the most appropriate choice.

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Answer:

3a. 240 C

3b. 3666.67 A

Explanation:

3a. Determination of the charge.

Current (I) = 2 A

Time (t) = 120 s

Charge (Q) =?

The charge, current and time are related by the following equation:

Charge (Q) = current (I) × time (t)

Q = It

With the above formula, we can obtain the charge as follow:

Current (I) = 2 A

Time (t) = 120 s

Charge (Q) =?

Q = It

Q = 2 × 120

Q = 240 C

Thus, the charge is 240 C

3b. Determination of the current

We'll begin by converting 220 KC to C. This can be obtained as follow:

1 KC = 1000 C

Therefore,

220 KC = 220 KC × 1000 C / 1 KC

220 KC = 220000 C

Next, we shall express 1 minute in second. This is shown below:

1 min = 60 s

Finally, we shall determine the current. This can be obtained as follow:

Charge (Q) = 220000 C

Time (t) = 60 s

Current (I) =?

Q = It

220000 = I × 60

Divide both side by 60

I = 220000 / 60

I = 3666.67 A

Thus, the current flowing through the bulb is 3666.67 A

Answer:

La posición en la que se encuentra el móvil en el instante t = 30 s es 172 m.

Explanation:

El movimiento rectilíneo uniforme (MRU) es el movimiento que describe un cuerpo o partícula a través de una línea recta a velocidad constante.

La distancia recorrida,  x , por un móvil que tiene un MRU con un velocidad  v  durante el intervalo de tiempo  t  es:

x= x0 + v*t

donde x0 es la posición inicial.

En este caso:

Reemplazando:

x= 22 m + 5 m/s* 30 s

Resolviendo:

x= 22 m + 150 m

x= 172 m

La posición en la que se encuentra el móvil en el instante t = 30 s es 172 m.