can you help me pls
i wanted step bay step
pls

Answer:

=0.15m

Explanation:

l

C

​

=l

Al

​

ρ

C

​

ρ

Al

​

​

=200∗

3.5∗10

−5

2.65∗10

−8

The magnitude of the potential difference needed to give an alpha particle 324.0 keV of kinetic energy is 2.50 x 10^6 kV.

The magnitude of the potential difference needed to give an alpha particle 324.0 keV of kinetic energy is calculated using the formula KE=1/2mv^2. Here, m is the mass of the alpha particle (6.644 x 10^-27 kg) and v is its velocity.

Thus, we have 324.0 keV = (1/2) (6.644 x 10^-27 kg)[v^2].

Solving for v, we get v = 1.38 x 10^7 m/s.

The potential difference, V, can then be calculated using the formula

V = (mv^2)/(2e)

where e is the charge of the alpha particle (charge of two protons, or 4.803 x 10^-10 C).

Thus, V = (6.644 x 10^-27 kg)(1.38 x 10^7 m/s)^2/(2(4.803 x 10^-10 C)) = 2.50 x 10^6 kV.

Therefore, the magnitude of the potential difference needed to give an alpha particle 324.0 keV of kinetic energy is 2.50 x 10^6 kV.

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Answer:

This level of needs is known as safety needs. Safety needs are the need for security, stability, and protection from physical and emotional harm. These needs include physical safety, financial security, health and well-being, and protection from discrimination and harassment.

Explanation:

Answer:

5m

Explanation:

the amplitude of a wave is basically if you cut the wave in half horizontally and went from the half point to either the lowest or highest point of the wave. and the midpoint of wave A is 0 and u can either go up 5 to get to the highest point, or down 5 to get to the lowest point (;

When is the average velocity of an object equal to the instantaneous velocity is C. This is the case only when the velocity is constant.

The instantaneous velocity of an object is equal to the average velocity of an object when the velocity is constant or when the acceleration is zero, this is the case only when the velocity is constant. When an object has a constant velocity, the instantaneous velocity of the object is equivalent to the average velocity of the object. This is true because the velocity of the object remains constant over time.

For example, if an object travels at a speed of 20 meters per second for a time period of 5 seconds, then the instantaneous velocity at the end of the 5 seconds is 20 meters per second, and the average velocity of the object over the 5 seconds is also 20 meters per second. This is because the velocity remained constant throughout the entire time period. Therefore, option c is correct, this is the case only when the velocity is constant.

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The energy released when a mass m is completely converted into energy is given by the famous equation of Albert Einstein, E = mc^2, where c is the speed of light in vacuum.

To convert the mass of 0.250 universal mass units (u) into kilograms, we can use the conversion factor:

The when 0.250 universal mass unit of matter is completely converted into energy, it produces about 372.8 MeV of energy.

1 u = 1.66054 × 10^-27 kg

Therefore, the mass in kilograms is:

m = 0.250 u * 1.66054 × 10^-27 kg/u = 4.15135 × 10^-28 kg

Using the equation E = mc^2 and converting the result into megaelectronvolts (MeV), we get:

E = mc^2 / (1.60218 × 10^-13) MeV

E = (4.15135 × 10^-28 kg) * (299792458 m/s)^2 / (1.60218 × 10^-13 MeV/J)

E ≈ 372.8 MeV

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Answer:

more

Explanation:

the higher the density the more closely/tighter the particles in the object will be

Answer:

A

Explanation:

Answer:

Distance divided by time

Explanation:

-- impurities in the water

-- air pressure is higher than standard

The total resistance of the circuit is approximately 21.11 Ω.  To determine the total resistance (R) of the series RLC circuit, we can use the relationship between the current (I), voltage (V), and resistance.

To determine the total resistance (R) of the series RLC circuit, we can use the relationship between the current (I), voltage (V), and resistance:

V = I * R

Given:

Irms = 9.00 A (root mean square value of current)

δvrms = 190 V (root mean square value of voltage)

The current leads the voltage by 38.0°

First, we need to find the peak values of current (I_peak) and voltage (V_peak). Since the root mean square (rms) values are given, we can use the following relationship:

I_peak = Irms

V_peak = δvrms

Now, we can calculate the total resistance (R) using the peak values:

R = V_peak / I_peak

R = 190 V / 9.00 A

R ≈ 21.11 Ω

Therefore, the total resistance of the circuit is approximately 21.11 Ω.

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If the fuel does 855 J of work on the potato, and produces 1422 J of heat, the change in internal energy of the fuel is 567 J.

According to the first law of thermodynamics, the change in internal energy of a system is equal to the heat added to the system minus the work done by the system:

ΔU = Q - W

where ΔU is the change in internal energy, Q is the heat added to the system, and W is the work done by the system.

In this case, the fuel does 855 J of work on the potato and produces 1422 J of heat. Since the potato cannon and the fuel can be considered as a closed system, the change in internal energy of the system can be calculated as:

ΔU = Q - W

ΔU = 1422 J - 855 J

ΔU = 567 J

Therefore, the change in internal energy = 567 J.

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The box's momentum when it reaches the bottom of the ramp  is 2.8 kg•m/s down the ramp.

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Answer:

Its d 3.74 x 10-8N

Explanation:

Answer: 3.74 x 10-8 N

Explanation:

When the cannonball finally touches the ground, it will have been 1.94 seconds.

We may disregard the answer t = -0.249 seconds since what we're interested in is what happens after the cannon is fired (i.e., when time t > 0). As a result, the cannonball reaches height h = 0 m and hits the earth at time t = 6.474 seconds.

Initial speed (u) equals 251 m/s.

Cliff height (h) equals 91 meters.

(s) is the horizontal distance.

Cliff height (h) equals 91 meters.

Gravitational acceleration (g) equals 9.8 m/s2.

Time (t) =?

h = ½gt²

91 = ½ × 9.8 × t²

91 = 4.9 × t²

Divide both side by 4.9

t² = 91/4.9

Do both sides' square roots.

t = √(91/4.9)

t = 1.94 s

Initial velocity (u) =  251 m/s

Time (t) = 1.94 s

Horizontal distance (s) =?

s = ut

s = 251 × 1.94 s

s = 486.94m.

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When the pole is lifted, it could be able to supply energy to the pole - vaulter much like that of a spring that launches the pole vaulter upwards.

We know that the pole vault is one of the popular sports especially in the Unites States. It is a competition that takes place even at the Olympic level and has a lot of athletes that do compete in the competition.

We know that as the pole unbends, it creates force that launches the pole-vaulter up and over the bar using your knowledge of potential and kinetic energy.

This implies that there are a series of energy conversions that do take place in the pole vault as it is in operation as we can see here. Thus, it is the series of the energy conversions that takes place in the pole vaulting that enables the athlete to be able to launch high in the game as we see.

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Answer:

【 In vector form , if angle between velocity vector and acceleration vector is less than 90° and greater than 0° then it is positive acceleration and if it is less than 180° and greater than 90° then it is negative acceleration. If there is no acceleration vector then it is called zero acceleration. 】

Grating spacing, d, is expressed as d = 1/n, where n is the number of grooves per centimeter. The numerical value of d is 1/2750 cm per groove.

In part (a), the relationship between the grating spacing, d, and the number of grooves per centimeter, n, is established as d = 1/n. This equation allows us to express the grating spacing in terms of the groove density.

In part (b), we convert the given value of n from grooves per centimeter to centimeters per groove. By reciprocating the value, we find that each groove occupies 1/2750 cm of space. Thus, the numerical value of d is determined as 1/2750 cm per groove.

The calculation helps us understand the physical spacing between adjacent grooves on the grating, providing a basis for further analysis in subsequent parts of the question.

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Formula for acceleration:

\(a=\dfrac{V^f-V^I}{t}\)

acceleration(measured in m/s^2) = Final velocity(measured in m/s) - Initial velocity(measured in m/s) / time(measured in seconds)

__________________________________________________________

Given:

\(V^I=0m/s\) (rest)

\(V^f=28m/s\)

\(t=20s\)

\(a=?\)

__________________________________________________________

Finding acceleration:

\(a=\dfrac{V^f-V^I}{t}\)

\(a=\dfrac{28-0}{20}\)

__________________________________________________________

Answer:

\(\boxed{a=1.4m/s^2}\)

Answer:

539 N

Explanation:

The force of gravity (also known as weight) on an object can be calculated using the formula:

F = m * g

where F is the force of gravity, m is the mass of the object, and g is the acceleration due to gravity.

For a 55 kg person on the surface of the earth, the acceleration due to gravity is approximately 9.8 m/s^2. Therefore, the force of gravity can be calculated as:

F = 55 kg * 9.8 m/s^2 = 539 N

So, the force of gravity on a 55 kg person on the surface of the earth is approximately 539 N.

Using everyday objects like a paperclip or a cent, monitoring the development of droplets, or using a soap bubble, one can illustrate surface tension at home or in the lab.

With a force tensiometer and a Du Noüy ring or Wilhelmy plate, surface tension can be detected. Or you might use an optical tensiometer and the pendant drop technique.

A stalagmometer is a device used to calculate surface tension using the stalagmometric method. . A stactometer or stalogometer is another name for it. A hygrometer is a type of weather instrument used to gauge the humidity level in the air.

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Using the free body diagram, let's determine the scenario the diagram illustrates.

From the free body diagram, we can see that the weight is acting on the object while the tension will be the force which supports the object.

The tension in this case, helps hang the object while the weight is the product of the mass of the object and the force of gravity acting on the object.

Tension can be defined as the pulling force transmitted through a rope or string.

Therefore, the best scenario which is represented by the free body diagram is a sign board supported by two strings.

ANSWER:

A signboard supported by

We used Charles's Law to solve this problem and found that the volume of the balloon would increase to 36.14 L when heated to 392 K.

The volume of a gas can change when the temperature changes, assuming the pressure remains constant. This relationship is described by Charles's Law, which states that the volume of a gas is directly proportional to its temperature in Kelvin.

To solve this problem, we can use the formula V1/T1 = V2/T2, where V1 is the initial volume, T1 is the initial temperature, V2 is the final volume (what we are trying to find), and T2 is the final temperature.

We have,
V1 = 27.7 L
T1 = 300 K
T2 = 392 K

Using the formula, we can solve for V2:
V2 = V1 * (T2 / T1)
V2 = 27.7 L * (392 K / 300 K)
V2 = 27.7 L * 1.307
V2 = 36.14 L

Therefore, when the helium balloon is heated to a temperature of 392 K, the volume of the balloon will increase to approximately 36.14 L.

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Answer:

a

Explanation:

vector is size and direction

hope this works :)

The type of noise pollution that escalated rapidly in the late 1990s was electronic noise pollution.

The late 1990s saw an alarming increase in electronic noise pollution, which is any unwanted or undesired sound caused by electronic devices and appliances. This type of noise pollution can range from the humming of air conditioning units to the buzzing of computer servers, and is one of the leading causes of environmental degradation.

As such, it is important for individuals, businesses, and government organizations to take proactive steps to reduce this type of noise pollution. By investing in sound-proofing measures and noise-canceling technology, we can ensure that our environment remains free of unwanted electronic noise pollution.

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The repulsion force between the two Arkon nuclei when the distance between them is 1x10⁻³μm is approximately 7.4x10⁻¹⁴N. The correct option is d. 7.4x10⁻¹⁴N.

The formula for repulsion force between two Arkon nuclei when the distance between them is given by Coulomb's law. Coulomb's law states that the force between two point charges is directly proportional to the product of the charges and inversely proportional to the square of the distance between them. Mathematically, the law can be expressed as F=kq1q2/r²,

Where F is the force, q1 and q2 are the charges, r is the distance between the charges, and k is the Coulomb's constant.The electric charge of one electron is 1.6x10⁻¹⁹C.

Therefore, the charge of the Arkon nucleus with 18 protons = 18(1.6x10⁻¹⁹) C = 2.88x10⁻₈⁸ CThe force between the two Arkon nuclei can be calculated using the formula above.

F=kq1q2/r²

Substituting the values we have;F = (9x10⁹)(2.88x10⁻¹⁸ C)2/(1x10⁻³ m)2F ≈ 7.4x10⁻¹⁴ N. Therefore, the repulsion force between the two Arkon nuclei when the distance between them is 1x10-3μm is approximately 7.4x10⁻¹⁴N. The correct option is d. 7.4x10⁻¹⁴N.

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Answer:

kinetic energy

Explanation:

Answer:

B Raise the object farther off the ground

In this given circuit, there are two resistors, R2 and R3 connected in series with a battery of 12 V as shown below;\(\Delta V = V = 12 V\)Let us first find the total resistance of the circuit.

Using the formula, resistances in series add up to give the total resistance of the circuit\(R_T = R_2 + R_3 = 8\ \Omega + 12\ \Omega = 20\ \Omega\)

Using Ohm's Law; the current through the circuit can be calculated as follows;

\(I_T = \frac{V}{R_T} = \frac{12\ V}{20\ \Omega} = 0.6\ A\)

Thus, the current through each of the resistors, R2 and R3 is the same and it is equal to the total current of the circuit;\(I_1 = I_2 = 0.6\ A\)

The potential difference across each of the two resistors, R2 and R3 is different because of the difference in resistance. Using Ohm's Law, the potential difference across each resistor can be calculated as follows;

\(\Delta V_2 = V_{R_2} = I_2 \cdot R_2 = 0.6\ A \cdot 8\ \Omega = 4.8\ V\)

\(\Delta V_3 = V_{R_3} = I_2 \cdot R_3 = 0.6\ A \cdot 12\ \Omega = 7.2\ V\)

Thus, the potential difference across resistor R2 is 4.8 V and across resistor R3 is 7.2 V.

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The cart travels approximately 3.33 meters when a man is pulling a cart having a mass of 2kg and an acceleration of 3 m/s².

To find the distance traveled by the cart, we'll use the work-energy theorem, which states that the work done on an object is equal to the change in its kinetic energy. The formula for work is:
Work = Force x Distance x cos(θ)
Since the man is pulling the cart, the angle (θ) between the force and the distance is 0 degrees, and cos(0) = 1.

So the formula simplifies to:
Work = Force x Distance
The force acting on the cart can be found using Newton's second law of motion:
Force = Mass x Acceleration
Given that the mass of the cart is 2 kg and its acceleration is 3 m/s², we can calculate the force:
Force = (2 kg) x (3 m/s²) = 6 N
Now we can find the distance traveled using the work done (20 J) and the force (6 N):
20 J = (6 N) x Distance
To solve for distance, divide both sides by 6 N:
Distance = 20 J / 6 N = 10/3 meters ≈ 3.33 meters

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Answer:What they did not count on is the immense distance to the stars, which made the shift so small it was not able to be detected until the 1830s. The first scientist to do so was Friedrich Bessel in 1838. The method that is used to measure distances to nearby stars is called trigonometric parallax, or sometimes, triangulation.

Explanation: