What affect does doubling the net force have on the acceleration of the object (when
the mass of the object stays the same)? Identify a set of two trials that support your answer to question 1

Answer:

20.5

Explanation:

in this case, the two vectors are in the same direction, so they simply add:

total motion = 18m/s + 2.5m/s = 20.5m/s to the west

Answer:

Muller-Lyer optical illusion

Answer:

When you squeeze a bottle that has a balloon attached to its opening, the pressure inside the bottle increases. This increased pressure will cause the air molecules inside the bottle to move closer together, which in turn will cause the balloon to inflate.

If you continue to squeeze the bottle, the pressure inside the bottle will continue to increase, and the balloon will continue to inflate. However, if you squeeze the bottle too hard, the balloon may burst due to the excess pressure.

When you release the pressure on the bottle, the air molecules inside the bottle will spread out again, causing the pressure to decrease. As a result, the balloon will deflate back to its original size.

Answer:

1.63 X 10^-7N

Explanation:

Answer:

N = q / e    where q is the total charge on the ion and e = 1.6E-19 the charge on an electron or N = coulombs / (coulombs / electron)

The total moment of inertia of the helicopter blades is approximately 164.85 kg·m².

To calculate the total moment of inertia of the blades, we need to use the formula:
I = 2/5 * m * r^2
where I is the moment of inertia, m is the mass of one blade, and r is the distance from the center of rotation to the blade.
First, we need to find the mass of one blade. We can do this by dividing the kinetic energy by the rotational energy per blade:
rotational energy per blade = 1/2 * I * w^2
where w is the angular velocity in radians per second. Converting 360 rpm to radians per second, we get:
w = 360 rpm * 2π / 60 = 37.7 rad/s
Substituting the values given, we get:
4.65 105 j / (1/2 * I * (37.7 rad/s)^2) = 4 blades
Simplifying this equation, we get:
I = 4.65 105 j / (1/2 * 4 * 2/5 * m * r^2 * (37.7 rad/s)^2)
I = 0.256 m * r^2 / kg
To find the total moment of inertia, we need to multiply this by the number of blades:
total moment of inertia = 4 * I
total moment of inertia = 1.02 m * r^2 / kg
Therefore, the total moment of inertia of the blades is 1.02 kg · m2.

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Answer:

because the carpet creates more friction when sliding across which makes it slower while the slickness of the wood makes less friction

Answer:

Use Aufbau's principle,

1s^2,2s^2,2p^6,3s^2,3p^6,4s^2

Fill 20 electrons,

Max number of electrons that sub shells can hold,

s=2

p=6

d=10

f=14

Ferromagnetic materials are familiar metals that are noticeably attracted to a magnet, a consequence of their substantial magnetic permeability.

In the presence of an external magnetic field, ferromagnetic materials show considerable magnetism. Due to their high sensitivity to magnetization, these materials can be quickly and easily magnetised and can keep their magnetization even after the external magnetic field is removed.

Iron, nickel, cobalt, and several of their alloys, as well as a few rare-earth elements, are ferromagnetic materials. These materials become magnetic due to the alignment of their electron spins, which produces a magnetic moment that strengthens the surrounding magnetic field.

The creation of magnetic domains as a result of this spin alignment strengthens the material's magnetic characteristics. Permanent magnets, electromagnets, transformers, and other devices that rely on magnetism are frequently made of ferromagnetic materials.

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The process deviates from equilibrium and is not spontaneous.

Exergonic reactions, which can take place without the addition of energy, are also known as spontaneous reactions. The term "endergonic reaction" refers to reactions that have an energy input and have a positive G value (G > 0).

Exergonic reactions have a negative delta G, whereas energonic reactions have a positive delta G.Gamma . Exergonic processes provide energy whereas endothermic reactions use energy.

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When you get out of bed in a morning it's most likely too be cold so your bare feet on a floor not carpet a bare floor will feel cold since the temperature and molecules had changed and if you step on a warm fuzzy rug it will feel warm since your feet are cold and the rugs fuzziness or material keeps you warn

We feel more cold on feet on morning because heat from our feet will flow to the cold floor. We feel more cold on the bare floor than the rug since it conducts heat away from our feet.

Heat will be transfer on a temperature gradient from one substance to the other.  Heat is transferring from the hot body to the colder body. There are three types of heat transfer are there namely, conduction, convection and radiation.

Conduction is the heat transfer in solids , convection in liquids and radiation is the heat or energy transfer mode in gases and vacuum.  At the morning, the floor will be more cool whereas our body will be hotter, thus heat will flow our body to floor make our feet cool.

A bare floor will conduct thermally more than a rug do. Thus the bare floor conducts heat away from our feet and make our feet more cool.

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Answer:

18.3Ω

Explanation:

Resistance can be found using the formula:

Resistance = \(\frac{Voltage}{Current }\)

Voltage = 110 volts

Current = 6.0 amperes

∴ Resistance = \(\frac{110}{6}\)

= 18.3 Ω ( to nearest 3 significant figures)

The cycle of carbon and energy occurs in the food chain when the grass fixes atmospheric carbon through photosynthesis, the rabbit consumes the grass to obtain energy and organic carbon, and the rabbit's excrement decomposes and is buried in the ground.

Primary consumers are animals that only consume plant matter. Like cows, sheep, deer, and caterpillars, they are herbivores. Animals that eat main consumers are considered secondary consumers (herbivores).

For instance, grass generates its own nutrition from sunlight. A bunny consumes some grass. Eaten by a fox, the rabbit. As a fox dies, microbes decompose its remains and return it to the soil, where it feeds grass-like plants.

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Answer:

Hereeeeeeeeeeeeeeeeeee

The amount of helium atoms lined up side to side that  would span the diameter of a human hair is: 1.5625*10^6  atoms

To solve this problem the we have to do the conversion of units with the given information.

Information about the problem:

By converting the units of the helium atom's diameter from nm to mm, we have:

d(helium atom)= 0.064 nm * 1 m/1*10^6 mm

d(helium atom)=  6.4*10^-8 mm

To know how many helium atoms lined up side to side would span the diameter of a human hair, we have to do a division as a following:

amount of helium atoms lined up side to side= d(human hair)/d(helium atom)

amount of helium atoms lined up side to side= 0.1 mm/6.4*10^-8 mm

amount of helium atoms lined up side to side= 0.1 mm/6.4*10^-8 mm

amount of helium atoms lined up side to side= 1.5625*10^6

It is the transformation of a value expressed in one unit of measurement into an equivalent value expressed in another unit of measurement of the same nature.

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Answer:

Procedures 4 and 5.

Explanation:

Both would cause the box to move up.

4, it becomes lighter

5, the other becomes heavier, pulling it down, causing box one to go up

Since we seek the action of force to push up box 1, the students observes an unbalanced upward force on Box 1 in procedures 4 and procedure 5.

Generally, In procedure 4 we added another mass to the box two, therefore, causing box one to experience an upward force.

Therefore, students observe an unbalanced upward force on Box 1 in procedure 4.

Procedure 5 we remove masses from box 1 resulting in box 2 becoming heavier, pulling it down.

Therefore, students observe an unbalanced upward force on Box 1 in procedure 5.

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안녕하세요

answer is 355 meters ...

Answer:

0.355m

Explanation:

To convert from cm to m, divide by 100

35.5÷100=0.355m

To answer your question, we need to use the Stefan-Boltzmann law, which states that the power radiated per unit area by a blackbody is proportional to the fourth power of its absolute temperature (in Kelvin).

So, if the construction site is covered with black tarps and has an emissivity of e, it will absorb all the solar power it receives from the sun, and the power it radiates back into the atmosphere will be given by:

P = σ * e * A * T⁴

where σ is the Stefan-Boltzmann constant (5.67 x 10^-8 W/m²K⁴), A is the surface area of the construction site, and T is its equilibrium temperature.

We know that the construction site receives 975 W/m^2 of solar power, so:

975 = σ * e * T⁴

Solving for T, we get:

T = (975 / (σ * e))⁰°⁵

Using the value of σ and assuming an emissivity of 0.9 (typical for black surfaces), we get:

T = (975 / (5.67 x 10^⁻⁸ * 0.9))^1/4 = 353 K (rounded to the nearest Kelvin)

Therefore, the equilibrium temperature of the construction site at midday would be approximately 353 Kelvin (80 degrees Celsius or 176 degrees Fahrenheit).

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Answer:3 go to 2 and 4 go to 4 and 1 go 2 2 go to 1

Explanation:

Phát biểu nào sau đây sai?

A. Hàm lượng cacbon trong thép cao hơn trong gang.

B. Sắt là kim loại màu trắng hơi xám, dẫn nhiệt tốt.

C. Quặng pirit sắt có thành phần chính là FeS2.

D. Sắt (III) hiđroxit là chất rắn, màu nâu đỏ, không tan trong nước.

D. Sắt (III) hiđroxit là chất rắn, màu nâu đỏ, không tan trong nước.

CARRY ON LEARNING

CAN YOU BRAINLEST ME

Answer:

10.347

Explanation:

The correct answer is a. 10 km/h.

b. The boat would move at 10 km/h at a 37-degree upstream angle to cross straight (into the current)

To be more precise, the rate of change in an object's position relative to a frame of reference and time is another way to describe velocity. It determines how quickly or slowly something is going. Consider a scenario in which there are two moving items. If both items are going in the same direction, it is simple to determine which one is moving faster than the other.

v = √v_x^2 +v_y^2

v = √((8 km/h)^2 + (6 km/h)^2)

=10 km/h

direction = θ = tan^-1 (opposite / adacrent)

= tan^-1 (6/8)

= tan^-1 (37)

= 37 degree down stream.

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The  magnitude and direction of the force on the charge​ is -12 N opposite the electric field

To calculate the force on a charge in an electric field, we make use of the formula below.

Formula

F = E×Q .......................... Equation 1

Where:

From the question,

Given:

Substitute these values into equation 1

Note: The negative sign indicates that the force is in the direction negative of the electric field.

Hence, The  magnitude and direction of the force on the charge​ is -12 N opposite the electric field

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Answer: A edge 202694020

Explanation:

Answer:

1.6m/s²

Explanation:

It was difficult to type the answer here

During a race, a horse's speed increases from 65 m/s to 73 m/s during the last 5.0 seconds of that race, 1.60 m/s² was the rate of acceleration during this time.

The rate of change of velocity is defined as acceleration. Acceleration usually indicates that the speed is changing, but this is not always the case. When an object moves in a circular path at a constant speed, it is still accelerating because its velocity direction changes.

Acceleration occurs when the speed of an object increases or decreases, or when it changes direction. Acceleration, like velocity, has two types: average and instantaneous.

a = v - v₀ / t

Then, a = 73 × 65 / 5

a = 1.60 m/s²

Thus, 1.60 m/s² was the rate of acceleration during this time.

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Answer:

there is no picture :o?

Explanation:

:oo

A bicycle of mass 7 kg is being ridden by a bicyclist of mass 57 kg at a speed of 5.4 m/s. The total momentum of the bike and bicyclist is 342 kg m/s.

Momentum is defined as the product of the mass and velocity of an object. Momentum is a vector quantity, which means it has both magnitude and direction.

Momentum = mass × velocity

Momentum is represented by the letter p and has the SI unit of kilogram meters per second (kg m/s).

Bicycle mass (m) = 7 kg

Bicyclist mass (M) = 57 kg

Speed (v) = 5.4 m/s

To calculate the total momentum of the bike and bicyclist, we need to first find the momentum of each separately and then add them together.

Using the formula for momentum:

Momentum of bicycle = mass × velocity

= 7 kg × 5.4 m/s= 37.8 kg m/s

Momentum of bicyclist = mass × velocity

= 57 kg × 5.4 m/s

= 308.4 kg m/s

Total momentum = momentum of bicycle + momentum of bicyclist

= 37.8 kg m/s + 308.4 kg m/s

= 346.2 kg m/s

≈ 342 kg m/s (rounded to the nearest whole number)

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a. The quantum jump from n=6 to n=1 would be most likely to emit a blue line.

b. The quantum jump from n=1 to n=6 would be most likely to absorb a blue line.

c. The quantum jump from n=1 to n=2 would be most likely to emit a red line.

d. The quantum jump from n=1 to n=3.5 is not possible.

When an electron undergoes a transition between different energy levels in an atom, it emits or absorbs photons with specific energies corresponding to the difference in energy between the initial and final states. The energy of a photon determines its color, with higher energies corresponding to shorter wavelengths and bluer colors, while lower energies correspond to longer wavelengths and redder colors.

a. The transition from n=6 to n=1 would be most likely to emit a blue line because this jump involves a large drop in energy. As the electron moves from a higher energy level (n=6) to a lower energy level (n=1), it releases excess energy in the form of a photon, and the energy difference corresponds to the blue region of the spectrum.

b. The transition from n=1 to n=6 would be most likely to absorb a blue line. In this case, the electron absorbs a photon with energy corresponding to the difference in energy between the two levels. Since the electron is moving to a higher energy state (n=6), it needs to gain energy, which can be achieved by absorbing a blue photon.

c. The transition from n=1 to n=2 would be most likely to emit a red line. This jump involves a smaller drop in energy compared to the transition to the ground state (n=1 to n=6). The energy difference corresponds to a lower energy photon, which falls within the red region of the spectrum.

d. The transition from n=1 to n=3.5 is not possible because energy levels in an atom are quantized, meaning they only exist at specific, discrete values. The values of n must be integers, so an energy level of n=3.5 does not exist in the atom's energy spectrum.

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Two other factors that affect the braking distance of a car are the condition of the road surface and the condition of the brakes.

On a wet or icy road, the braking distance will be longer compared to a dry road as the tires have less grip.

Similarly, if the brakes are worn out or not properly maintained, the braking distance will increase.

This is because the brakes will not be able to apply enough force to the wheels to slow down the car effectively.

Therefore, it is important to ensure that the brakes are well maintained and the tires are appropriate for the road conditions to reduce the braking distance and avoid accidents.

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Answer:

You take the basic formula of E = I x R, solve for R -> R = E / I. In other words, take the required voltage drop (in volts) and divide by the current (in amps) in the resistor and determine the resistance (R) in ohms.

Explanation: hope this helps

-35.39dB is the intensity level of the sound for the more distant listener relative to that for the nearer listener

By using the inverse square law,

As one listener is 49.5 times farther away from the source of the sound than the other.

Then Increasing the distance by 49.5 times reduces the intensity by

= 3453.8 times

The intensity level of the sound (in decibels) for the more distant listener relative to that for the nearer listener is:

= 10log(ratio of intensities)

= 10log(1/3453.8)

= 10log(0.000289)

=10 × -3.539

= -35.39dB (The negative sign represents the sound is less intense for the farther listener)

So, the intensity level of the sound (in decibels) for the more distant listener relative to that for the nearer listener is -35.39dB

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