I am riding my bike at 25 m/s, I start to slow down at a rate of -4 m/s2. I slow down for 5 seconds... what is my final velocity?

The potential difference between two points in a copper wire is 0.0037 V. The potential difference (V) between two points 100 m apart in a 1.0-mm diameter copper wire (resistivity 1.68 x 10^-8 Ωm) carrying a current of 15 A is 0.0037 V.

Resistivity is a measure of the resistance of a given substance. The resistance of the wire is obtained using the formula: \(R = (ρ x L) / A\)

Where R is the resistance, ρ is the resistivity, L is the length, and A is the area of cross-section.

Using the formula, the resistance of the wire can be calculated:

\(R = (ρ x L) / AR\)

= (1.68 x 10^-8 Ωm x 100 m) / ((π x (1.0 x 10^-3 m)²) / 4)

R = 0.021 Ω

The potential difference (V) can be obtained using Ohm's Law, which states that:

\(V = I x RV\)

= 15 A x 0.021 Ω

V = 0.315 V

This value of potential difference (V) is for a wire of length 100 m.

The potential difference between two points 100 m apart is obtained by multiplying this value by the fraction of the wire length between the two points.

This fraction is given by: (100 m / length of wire)

Therefore, the potential difference between two points 100 m apart is:

V2 - V1 = (100 m / length of wire) x VV2 - V1

= (100 m / 100 m) x 0.315 VV2 - V1

= 0.315 V

Therefore, the potential difference between two points 100 m apart in a 1.0-mm diameter copper wire carrying a current of 15 A is 0.315 V (rounded off to three significant figures) or 0.0037 V per meter of wire.

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The most popular electrode diameters range from small sizes, typically around 1 mm, to larger sizes, often up to 10 mm or more.

Electrodes are commonly used in various fields such as medical applications, electrical engineering, and material science. The diameter of an electrode plays a crucial role in its functionality and application. Smaller electrode diameters, typically around 1 mm, are commonly used in precision applications where fine control and high resolution are required. These smaller electrodes are suitable for intricate tasks such as microsurgery, microelectronics, and microfabrication.

On the other hand, larger electrode diameters are utilized for applications that require higher current-carrying capacity and greater durability. These larger electrodes, which can range from several millimeters to centimeters in diameter, are commonly used in industries such as welding, metal fabrication, and power generation. The larger diameter allows for efficient heat dissipation, better electrical conductivity, and improved mechanical stability.

It's important to note that the specific range of popular electrode diameters can vary depending on the specific application, industry standards, and technological advancements. Therefore, it is always recommended to consult the relevant guidelines or industry practices to determine the appropriate electrode diameter for a particular use case.

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Answer:

C - 0 meters

Explanation:

Displacement is the difference in where you started and where you end up. If Bill starts at his house and ends at his house, there was no change in position, meaning Bill had no displacement. In math this would be

400 + (-400) = 400 - 400 = 0

assuming he runs in the positive direction and then in the negative direction. Either way you put it, it still ends up as 0

Answer:

Either C or D.

Explanation:

Either one of them.

Answer:19.1m

Explanation:

Answer:

A. Her funding was from a source that could profit from the results.

Explanation:

GOT IT RIGHT

Answer:

Most exceptions to the trend of decreasing radius moving to the right within a period occur in the d-block.

What are the characteristics of d-block elements?

Therefore, most exceptions to the trend of decreasing radius moving to the right within a period occur in the d-block.

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Answer:

i was doing this is it actually 0.6

Explanation:

;D

The acceleration of the skateboard from its initial velocity to the final velocity over the given time is 0.6m/s².

Motion is simply the change in position of an object over time.

From the First Equation of Motion;

v = u + at

Where v is final velocity, u is initial velocity, a is acceleration and t is time elapsed.

Given the data in the question;

To determine the acceleration of the skateboard, we substitute our given values into the expression above.

v = u + at

10m/s = 4m/s + ( a × 10s)

( a × 10s) = 10m/s - 4m/s

a × 10s = 6m/s

a = 6m/s ÷ 10s

a = 0.6m/s²

Therefore, the acceleration of the skateboard from its initial velocity to the final velocity over the given time is 0.6m/s².

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The charge in fig A is positive, in fig B is positive and in fig C is negative. this is given by the Fleming's left hand rule.

In magnetism and electromagnetic, the Fleming Left-Hand Rule and Fleming Right-Hand Rule are fundamental principles. They were created by John Ambrose Fleming in the late 19th century as an easy method of determining the direction of motion in an electric motor or the direction of electric current or electric positive charge in an electric generator. It is crucial to remember that these criteria only indicate the direction of the three parameters (magnetic field, current, and force) when the direction of the other two parameters is known and do not define their magnitude.

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Answer:

There are about six to seven million cones in a human eye and are most concentrated towards the macula. Cones are less sensitive to light than the rod cells in the retina (which support vision at low light levels), but allow the perception of color.

Answer:

Rods

Explanation:

There are about six to seven million cones in a human eye and are most concentrated towards the macula. Cones are less sensitive to light than the rod cells in the retina (which support vision at low light levels), but allow the perception of color.

A movement from Y to Z results from plastic production technology advancements.

What induces motion along the PPC?

If resources are finite and constant, the move along a PPC through one point to the next shows that more of either good can only be generated by giving production up of the second good.

Is there a rise in plastic manufacture globally?

1950 2021: worldwide plastic output. In 2021, the output of plastics on a global scale was projected to reach 390.7 million metric tons, a rise of 4% annually. Since the 1950s, plastics production has exploded. The extraordinary adaptability of this class of materials is what drives their yearly production increases.

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Answer:

rubber

Explanation: because its the only insulator

Answer:

C. Law Of Conservation Of Mass

Explanation:

In this scenario, this would occur due and is explained by the Law of Conservation of Mass. This law basically states that the mass that exists during and after a chemical reaction must remain the same, assuming that the reaction is taking place in a closed environment where no loss of mass is occurring. This means that if the reaction is in a closed environment the mass should not change whatsoever even if it is not in the same form or substance as it was before the reaction occurred.

Answer:

X is frictional force

Explanation:

when X is greater than pushing force,the object won't move

The correct answer for the nature of force at "X" is frictional force.

What is friction force?

Friction or frictional force is the force that acts when two surface comes in contact with each other. When a body A is resting upon a body B, The force that helps the body to maintain the equilibrium position is static friction.

Kinetic friction slows down a moving object, when their is relative   motion between two objects. It always acts in apposite direction to the force applied.

It is denoted by \(F\).

The formula to calculate static friction is \(F = \mu N\)

\(\mu_s =\) Co-efficient of static friction

\(\mu_k =\) Co-efficient of Kinematic friction.

The Force indicated at "X" is "Kinetic friction", It will slow down the moving object.

When "X" is greater than the moving object, the object will stop moving and will remain at rest.

The Force Indicated at "X" is Frictional force.

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Answer:

vector quantity

I hope it's hepl u

Option c is correct. Approximately 513 bulbs in the consignment can be expected to have a life between 710 and 830 hours.

For solving this problem, need to calculate the z-scores for the given range of bulb lives and then use these z-scores to find the corresponding probabilities from the standard normal distribution table.

The z-score can be calculated using the formula:

z = (x - μ) / σ,

where x is the value, interested in, μ is the mean, and σ is the standard deviation. In this case, the mean (μ) is 750 hours and the standard deviation (σ) is 50 hours.

For a life of 710 hours:

z = (710 - 750) / 50 = -0.8

For a life of 830 hours:

z = (830 - 750) / 50 = 1.6

Next, look up the probabilities associated with these z-scores in the standard normal distribution table. The probability associated with a z-score of -0.8 is 0.2119, and the probability associated with a z-score of 1.6 is 0.9452.

For finding the number of bulbs expected to have a life between 710 and 830 hours, calculate the difference between these probabilities:

0.9452 - 0.2119 = 0.7333

Therefore, approximately 0.7333 * 700 = 513 bulbs in the consignment can be expected to have a life between 710 and 830 hours.

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The movement of materials from low to high concentration area is called Active transport.

Active transport is described as a process in which molecules are transferred using external energy from an area of lower concentration to a region of greater concentration in resistance to a gradient or an obstacle. To move charged or uncharged substrates despite their thermodynamic forces, active transport, sometimes referred to as uphill transport, requires to link to another spontaneous process.

The movement of ions or other molecules through with a semipermeable membrane into a higher concentration region is known as active transport. Because it uses enzymes and energy to operate, this method is referred to as "active" transport.

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The magnitude of the Electrostatic force is proportional to the square of the distance between the two charges. As a result, doubling the distance between the two charges reduces the attraction or repulsion to one-fourth of its original magnitude.

If the distance between objects is doubled, the force of attraction is 1/4.

If the distance between objects is doubled, the force between objects is quartered. If the distance between objects is tripled, the force between them is 9 times smaller. If the masses of both bodies double, the force between them quadruples.

Electrostatic force is a non-contact force. They pull and push things without touching them. When some materials rub against each other, something called a "charge" can move from one surface to another. Charged objects attract other uncharged objects and can push or pull other charged objects.

As the distance between two charges increases, the repulsive force between them decreases. For equal charges, the electrostatic force decreases as the distance between the two charges decreases.

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Answer:

see below

Explanation:

a wave means one complete wave which is 1 period

so a) 5 complete waves

wavelength is the shortest distance between any two points in phase

so wavelength = 1 CM

amplitude of a wave is the maximum displacement of a particle from its rest position

so amplitude = 3 CM

hope this helps

Answer:

Explanation:

The initial vertical velocity is 540sin55° = 442.342103... 442 m/s

The initial horizontal velocity is 540cos55° = 309.731275... 310 m/s

In the real world, both initial velocities would be reduced by air resistance and vertical velocity will be altered by gravity.

Answer:

Reena

Explanation:

200 / 5 = 40 metres in a minute

200 / 4 = 50 metres in a minute,

Therefore Reena is faster

St. John’s

_________

o0o0o0o0o0

The number of hydrogen atoms required to obtain 7.9 kg of hydrogen is approximately 4.78 x 10^26 atoms.

To calculate this, we can use the following steps:

1. Determine the mass of one hydrogen atom: 1.0 atomic mass unit (u).

2. Convert the mass of hydrogen from kilograms to atomic mass units by dividing 7.9 kg by the mass of one hydrogen atom (1.0 u).

3. Use Avogadro's number, which states that 1 mole of any substance contains 6.022 x 10^23 entities (atoms, molecules, etc.), to convert from atomic mass units to the number of hydrogen atoms.

4. Multiply the result obtained in step 2 by Avogadro's number to find the number of hydrogen atoms.

The answer, approximately 4.78 x 10^26 atoms, represents the number of hydrogen atoms required to obtain 7.9 kg of hydrogen.

In this calculation, we use conversion factors and Avogadro's number to relate the mass of hydrogen in kilograms to the number of hydrogen atoms.

By converting units and using the concept of moles, we can determine the quantity of atoms in a given mass of a substance.

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To determine the energy of the lowest-energy photon that can be absorbed by atoms in their ground state, you'll need to consider the energy levels of the atoms and the energy difference between these levels. The energy of a photon (E) can be calculated using the equation E = hf, where h is Planck's constant (6.63 x 10^-34 Js) and f is the frequency of the photon.

For the lowest-energy photon to be absorbed, it must cause a transition from the ground state (n=1) to the next higher energy level (n=2). Using the Rydberg formula, you can find the energy difference (ΔE) between these levels: ΔE = -13.6 eV * (1/n1^2 - 1/n2^2).

Plugging in n1 = 1 and n2 = 2, you'll find the energy difference is about 10.2 eV. To convert this to joules, multiply by the elementary charge (1.6 x 10^-19 C), resulting in approximately 1.63 x 10^-18 J.

Finally, to find the frequency (f) of the photon, rearrange the equation E = hf to f = E/h, and substitute the values: f ≈ 2.46 x 10^14 Hz. Therefore, the energy of the lowest-energy photon that can be absorbed by these atoms in their ground state is approximately 1.63 x 10^-18 J.

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filling it up

Explanation:

Answer:

Explanation:

given:

jogger displacement (distance) = 0.200 km

time = 16.5 sec.

find:

1. velocity in m/s

2. velocity in km/hr.

solution:

velocity = distance / time

1.  velocity = 0.200 km x   1000 m

                     16.5 sec             1 km

                  = 12.1 m/s.

2.  velocity = 0.200 km x   3600 sec.

                     16.5 sec             1 hr.

                   = 43.3 km/hr.

Given below  are some things in an individual's house that can be utilised daily that relates to grade 10 optics

1. Mirrors: It is applied every day to check the individual appearance. Mirrors are created by glass with a reflective coating on the back. It reflects light and creates an image of the object in front of them. Mirrors could be plane, concave or convex lens.

2. Eyeglasses: It depends on the individual that wears eyeglasses, they  apply them every day to see clearly. Eyeglasses are used  to correct vision problems. Lenses could be concave or convex.

3. Telescopes: Depends if the individual has telescope at home, they apply it to observe distant objects such as stars and planets. Telescopes applied  to collect and focus light.

4. Cameras: Cameras utilizes lenses to focus light onto a sensor or film. The aperture helps to controls the amount of light that enters the camera. The shutter speed controls how long the sensor or film is exposed to light.
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2.97×10^6 m  is the total distance traveled (in m) by a point 9.00 cm from the axis of rotation of the ultracentrifuge.

\(\theta=\)3.29×10^7 rad

r= 9cm= 0.09 m

distance = \(\theta \cdot r\)

distance =3.29×10^7 rad×0.09 m

distance =2.97×10^6

Distance is the length between two locations or things, independent of direction. Since distance is a scalar property, it only takes into consideration the total magnitude and ignores the start and finish positions. Since distance is a scalar attribute, it can only have a positive or zero value; it cannot have a negative value.

The most common unit of measurement for distance is the meter (m), while larger distances can also be stated in kilometers (km), while smaller distances can be expressed in centimeters (cm) or millimeters (mm). When calculating distance, the letter D is often used to represent the distance traveled.

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