5. describe the acceleration of the marble after it leaves the ramp. use kinematic equations to support your discussion.

It takes approximately 1.38 milliseconds to reduce the capacitor's charge to 10 μC.

The time it takes for a capacitor to discharge through a resistor is given by the formula:

t = RC ln(Vi/Vf)

Where:

t = time in seconds

R = resistance in ohms

C = capacitance in farads

Vi = initial voltage across the capacitor in volts

Vf = final voltage across the capacitor in volts

In this case, the capacitance is 20 μF, the resistance is 1.4 kΩ, the initial voltage is 25 μC/20 μF = 1.25 kV, and the final voltage is 10 μC/20 μF = 0.5 kV.

Therefore, plugging in the values into the formula, we get:

t = (1.4 × 10^3 Ω) × (20 × 10^-6 F) × ln(1.25 kV/0.5 kV)

t ≈ 1.38 ms

It takes approximately 1.38 milliseconds for the capacitor to discharge through a 1.4 kΩ resistor and reduce its charge from 25 μC to 10 μC.

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Answer:

YES

Explanation:

Asexual means the plant is identical to the parent

Answer:

true

Explanation: Asexual reproduction produces plants that are genetically identical to the parent plant because no mixing of male and female gametes takes place.

Answer:

is suppoesd to say after 20 yrs

Explanation:

Answer:

Tt can be calculated by copy

Answer:

Because when people under the age of 21 try to buy alcohol, they need to be verified by their state that they are that age. So if they are under legal age, 21,  the store isn't allowed to give them the Alcoholic beverage.

Explanation:

The acceleration of van is -10.0 m/s².

Acceleration is defined as the rate of change of velocity. It is a vector quantity, which means it has both magnitude and direction. In the context of this problem, the van's velocity changed from 20 m/s to 10.0 m/s in a time of 3.0 s. We can calculate the acceleration of the van using the formula,

acceleration = (final velocity - initial velocity) / time

Substituting the given values, we get,

acceleration = (10.0 m/s - 20 m/s) / 3.0 s

= -10.0 m/s²

The negative sign indicates that the acceleration is in the opposite direction to the initial velocity. In other words, the van is decelerating, or slowing down.

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The star Betelgeuse is about 600 light-years away. If it explodes tonight, approximately: we won't know about it until 600 years from now.

Rather than measuring time, a light-year measures distance (as the name might imply). The distance a light beam travels in a single Earth year is measured in "light-years," which is roughly equivalent to 6 trillion miles (9.7 trillion kilometers).

Because the cosmos is expanding, the light that goes the farthest is stretched the most, resulting in the object that emitted that light being farther away. The expanding cosmos is the reason we can see things up to 46.1 billion light-years away. According to a common model of the Universe, some of the most recently discovered objects may be more than 13 billion light years away.

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Answer:

The density of a substance that can be raised to a column height of 12.3 cm under vacuum by atmospheric pressure is 8.4 × 10⁴ kg/m³.

a) The heat required to increase the temperature of ice from -15.00°C to 0°C without melting the ice is 837 J.

b) The heat required to melt the 40.0-g ice to water at 0°C is 1340 J.

c) The final temperature of the mixture is 0°C.

Explanation to the above given short answers are written below,

a) To calculate the heat required to increase the temperature of ice, we can use the formula:

Q = m * c * ΔT
where Q is the heat,
m is the mass,
c is the specific heat, and
ΔT is the change in temperature.

In this case, the mass of the ice is 40.0 g, the specific heat of ice is 2090 J/kg K, and the change in temperature is 0°C - (-15.00°C) = 15.00°C.

Converting the mass to kilograms (40.0 g = 0.040 kg), we can calculate:

Q = 0.040 kg * 2090 J/kg K * 15.00°C = 837 J

b) To calculate the heat required to melt the ice, we can use the formula:

Q = m * L
where Q is the heat,
m is the mass, and
L is the latent heat of fusion.

In this case, the mass of the ice is 40.0 g and the latent heat of fusion is 33.5 x 10^4 J/kg.

Converting the mass to kilograms, we can calculate:

Q = 0.040 kg * 33.5 x 10^4 J/kg = 1340 J

c) When the ice and water reach equilibrium, their final temperature will be the melting point of ice, which is 0°C. This is because during the phase change from ice to water, the temperature remains constant until all the ice has melted.

Therefore, the final temperature of the mixture is 0°C.

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The telescope created the data gathered by Kepler and his team.

What is a star?

A star is a large luminous astronomical body which produces light and heat energy as well as radiation.

There are billions of stars in the universe organized into galaxies.

The Sun is the star of our solar system.

The Kepler project produced a wide range of data products and documentation to assist the community in using data from the mission to help study both exoplanets and other astrophysical areas.

In the video, a mysterious star was observed which is 50 percent bigger and 1,000 degrees hotter than the Sun.

By mean of telescopes, it was observed that the dimming seen in the diet was dues to dust particles.

These data produced ranges from engineering data on the detectors to lists of planet candidates and includes many of the intermediate data products in the data processing path.

The Kepler first mission came to an end after four years when two of the four reaction wheels, used to point the spacecraft malfunctioned.

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When both foci of an ellipse coincide at the same position, the eccentricity of the ellipse is 0, and it becomes a circle. The answer is (c) 0.

When both foci of an ellipse are located at exactly the same position, the eccentricity of the ellipse must be 0. An ellipse is a set of points whose distance from two fixed points (foci) sum to a fixed value. The distance between the foci is the major axis length, and the distance between the vertices is the minor axis length. The formula for an ellipse is (x−h)2/a2+(y−k)2/b2=1.

The distance between the foci is 2c, which is always less than the length of the major axis. The relationship between the semi-major axis a and semi-minor axis b of an ellipse is given by a2−b2=c2. An ellipse's eccentricity is defined as the ratio of the distance between the foci to the length of the major axis, with e=c/a. When the two foci coincide at the same position, the eccentricity of the ellipse is 0, and the ellipse becomes a circle.

The answer is (c) 0.

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The electrical conductivity of the wire is 10^7 S/m (Siemens per meter).

To calculate the electrical conductivity, we can use the formula:

Electrical conductivity (σ) = 1 / (Resistance × Cross-sectional area / Length)

Given:

Length (L) = 20 cm = 0.2 m (since 1 cm = 0.01 m)

Cross-sectional area (A) = 2 × 10^(-3) cm^2 = 2 × 10^(-7) m^2

Resistance (R) = 0.2 Ω

Substituting these values into the formula, we get:

Electrical conductivity (σ) = 1 / (0.2 Ω × (2 × 10^(-7) m^2) / 0.2 m)

The unit of resistance cancels out, and we are left with:

σ = 1 / (\(2 \times 10^{(-7) }m^2\) / 0.2 m)

Simplifying further:

σ = 1 / (\(10^{(-7)}\) m)

To divide by a number in scientific notation, we can multiply by its reciprocal. Therefore:

σ =\(1 \times 10^7\) m^(-1)

Hence, the electrical conductivity of the wire is 10^7 S/m (Siemens per meter).

Electrical conductivity is a measure of a material's ability to conduct electric current. In this case, the wire's electrical conductivity is relatively high, indicating that it is a good conductor of electricity.

The value of \(10^7\)S/m suggests that the wire can easily carry current due to the presence of free charge carriers (e.g., electrons) that can move through the wire with minimal resistance.

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The momentum of object B is higher than that of object A.

A system's mass and velocity are multiplied to produce its linear momentum. It is simple to see how momentum relates to an object's mass and speed. As a result, an object's momentum grows as its mass or speed increases.

Mass times speed equals momentum.

Object A: momentum is equal to 67 kg times 17 m/s, or 1139 kg/m/s.

Object B's momentum is equal to 2 kg times 100 m/s, or 200 kg/m.

Given that momentum is directly inversely proportional to both mass and velocity, object B has more momentum than object A since its lower mass is more than offset by its much higher velocity.

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The fact that the charge rises as the number of capacitors is increased is proof. Option B is right, so.

Can the addition of the capacitors in series or parallel be determined using evidence from the data?

A student didn't show up for a lab looking at how numerous capacitors behave in circuits. Students in the class supplied the student the information above, which illustrates the effect of adding more identical capacitors to a circuit on its equivalent capacitance, but they did not specify if the capacitors were increased.

Can it be determined whether the capacitors was added in parallel or series using evidence from the data?

A. As capacitors are added, the charge changes.

B. With each subsequent capacitor, the charge doubles.

C. As capacitors are added, the charge grows.

D. There is no evidence in the data to support how the capacitor were added.

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The final coordination is (3,-7,-4).

Coordinates are written as (x, y) which means the factor at the x-axis is written first, observed by the point at the y-axis. a few youngsters may be taught to consider this with the phrase 'along the corridor, up the stairs, which means that they need to follow the x-axis first after which the y.every factor may be identified by means of an ordered pair of numbers; this is, more than a few at the x-axis called an x-coordinate, and a range of at the y-axis called a y-coordinate.

The point at which the 2 axes intersect is called the origin – the coordinates of this point are (0, zero). Coordinates are written as (x, y) which means the point on the x-axis is written first, followed by the point on the y-axis.

According to question;-

Initially you are at: (0, 0, 0)

you move 3 units along the positive x-axis: (3, 0, 0)

you move 5 units in the negative z-axis: (3, 0, -4)

this is the final position (3,-7,-4)

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Answer:

250 / 2.5*10^2

Explanation:

if the weight of the sdof is 20 kips and the stiffness is 50 kips/in, the natural frequency period of the structure is  12.5 seconds.

In structural dynamics, the natural frequency of a Single Degree of Freedom (SDOF) system is a characteristic property that describes how quickly the system oscillates or vibrates. The natural frequency is determined by the mass of the system and its stiffness.

To calculate the natural frequency, we need to convert the weight to mass and use the formula:

fn = 1 / (2π) * √(k / m)

First, let's convert the weight to mass:

Weight = mg

20 kips = m * 386.4 in/s² (acceleration due to gravity)

m = 20 kips / 386.4 in/s²

m = 51.73 lb/s²

Now, we can calculate the natural frequency:

fn = 1 / (2π) * √(k / m)

fn = 1 / (2π) * √(50 kips/in / 51.73 lb/s²)

fn ≈ 0.080 Hz

Finally, we can calculate the natural frequency period:

Period (T) = 1 / fn

T ≈ 1 / 0.080 Hz

T ≈ 12.5 seconds

Therefore, the correct natural frequency period of the SDOF structure is approximately 12.5 seconds.

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Answer:

A

Explanation:

The best advice for Maurice is he should recognize that celebrities often present unrealistic body images. The correct option is A.

A suggestion made to you by someone regarding what to do or how to act in a specific circumstance: Steven offered me some wise counsel. I believe I will heed your counsel and purchase the green dress. Can I offer you some advice? I require assistance choosing a PC.

Body Dysmorphic Disorder is a condition where “imagined ugliness” is present. People who have this disease perceive a wildly distorted version of themselves when they look in the mirror.

These people frequently spend hours scrutinizing, trying to hide, or worrying about their perceived shortcomings.

Therefore, the correct option is A. He should recognize that celebrities often present unrealistic body images.

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Answer:

1.63 \(ms^{-2}\)

Explanation:

The equation \(g = \frac{G*M}{R^2}\) would be used where:

g = acceleration due to gravity

G = universal gravitational constant (6.67408 × \(10^{-11}\) \(m^{3} kg^{-1} s^{-2}\))

M = mass

R = radius.

assuming the values following both 10s of the mass and radius are their exponents, which is a little confusing, the values given would simply be substituted.

Anyone can correct me if I'm wrong.

The wavelength of the waves produced by Alicia's heart is 0.8 meters.

What is wavelength?

The wavelength of the waves produced by Alicia's heart can be calculated using the formula:

wavelength = speed / frequency

where speed is the speed of blood flow, and frequency is the heart rate in beats per second.

First, we need to convert Alicia's heart rate from beats per minute to beats per second:

75 beats/min / 60 sec/min = 1.25 beats/sec

Next, we need to calculate the speed of blood flow. The average blood flow in an artery leaving the heart is typically around 0.5 to 1.5 meters per second, so we'll use the middle of that range:

speed = 1 m/s

Now we can plug in the values and calculate the wavelength:

wavelength = speed / frequency

wavelength = 1 m/s / 1.25 beats/sec

wavelength = 0.8 meters

Therefore, the wavelength of the waves produced by Alicia's heart is 0.8 meters.

What is frequency of heart?  

The frequency of the heart refers to the number of contractions it undergoes in a given period of time, usually measured in beats per minute (bpm). The normal resting heart rate for adults is typically between 60 and 100 bpm. When the heart beats, it generates pressure waves that travel through the arteries and can be detected as a pulse. The frequency or rhythm of these pressure waves is directly related to the frequency of the heart contractions. In general, a higher heart rate corresponds to a faster pulse rate and vice versa.

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The shift of blackbody curves can be described by Wien's displacement law, which states that the peak wavelength of the emission from a blackbody radiator is inversely proportional to the absolute temperature of the radiator.

When you compare the blackbody curves of very hot objects with much cooler objects, there will be a shift towards the left side of the x-axis (wavelengths). The blackbody curves of hot objects will have a higher maximum emission value. This shift is because the temperature of an object determines the amount of radiation emitted by it, and the wavelength at which this radiation is emitted. In other words, as the temperature of an object increases, the maximum amount of radiation emitted will also increase. The Wien's displacement law can help in describing the shift of blackbody curves when objects of different temperatures are compared.The shift of blackbody curves when objects of different temperatures are compared can be explained using the Wien's displacement law. This law states that the peak wavelength of the emission from a blackbody radiator is inversely proportional to the absolute temperature of the radiator.

As the temperature of an object increases, the peak wavelength of the radiation emitted will decrease. This means that the blackbody curve will shift towards the left side of the x-axis (wavelengths) and will have a higher maximum emission value.

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The correct answer is e. None of the above alternatives gives a true statement. None of the statements in options a, b, c, and d are true when it comes to a modulus M over a ring R having a finite basis.

When a modulus M can be formed entirely from a finite set of elements, the modulus M is said to be finitely generated. M's finite basis does not, however, automatically imply that M is finitely generated. A basis is a set of linearly independent elements, and it might not be enough to produce all of the components of the modulus.

According to the assertion in option b, M must include nonzero items of nonzero order if it has a finite basis. This is untrue, though. The smallest positive number k, such that the element raised to the power of k equals the identity element, is referred to as the order of an element.

According to option c, every non-null element in a modulus with a finite basis has a null. Nevertheless, this claim is likewise untrue. It is possible for a modulus with a finite basis to have non-null elements without a null element.

According to option d, a ring R is a body, or a field, and only then can a modulus have a finite basis. However, this assertion is also untrue. Even though the ring R is not a field, a modulus can nonetheless have a finite basis. None of the given alternatives provides a true statement about a modulus M over a ring R having a finite basis.

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Don't forget to make brainliest answer

-

a) Here is a sketch of the velocity-time graph for the motion described:

```

| _________

v (m/s)| / \

| / \

| / \

| / \

|___/__________________\___

t=0 15s 3min 3min 30s

```

b)

i. The highest velocity reached by the car is the velocity it travels at during the uniform motion phase, which is constant at the end of the acceleration phase. We can find this velocity using the equation:

v = u + at

where u is the initial velocity (10 m/s), a is the acceleration (1 m/s^2), and t is the time taken to accelerate (15 s).

v = 10 + 1(15) = 25 m/s

So the highest velocity reached by the car is 25 m/s.

ii. The time spent decelerating can be found using the equation:

v = u + at

where v is the final velocity (0 m/s), u is the initial velocity (25 m/s), a is the deceleration (unknown), and t is the time taken to decelerate.

0 = 25 + a(t)

t = -25/a

We know that the distance travelled during deceleration is 500 m, so we can also use the equation:

s = ut + 0.5at^2

where s is the distance travelled (500 m), u is the initial velocity (25 m/s), a is the deceleration (unknown), and t is the time taken to decelerate (from above).

500 = 25(-25/a) + 0.5a(-25/a)^2

500 = -625/a + 3125/a

500a = 3125 - 625

a = 5 m/s^2

Substituting this value of a back into the expression for t, we get:

t = -25/5 = -5 s

Since time cannot be negative, we take the absolute value of t:

t = 5 s

So the time spent decelerating is 5 seconds.

iii. The distance between the speed limit sign and the checkpoint is the sum of the distances travelled during each phase of the motion:

s = ut + 0.5at^2 (for acceleration phase)

s1 = 10(15) + 0.5(1)(15)^2 = 187.5 m

s2 = vt (for uniform motion phase)

s2 = (25)(3)(60) = 4500 m

s3 = vt + 0.5at^2 (for deceleration phase)

s3 = (25)(0) + 0.5(5)(5)^2 = 62.5 m

s_total = s1 + s2 + s3 = 187.5 + 4500 + 62.5 = 4750 m

So the distance between the speed limit sign and the checkpoint is 4750 meters.

iv. The average velocity for the whole journey is given by the total distance travelled divided by the total time taken:

s_total = 4750 m

t_total = 15 + 180 + 5 = 200 s

v_avg = s_total / t_total = 4750 / 200 = 23.75 m/s

So the average velocity for the whole journey is 23.75 m/s.

The distance from the lodge at Rebecca's current point is approximately 5.24 miles (rounded to the nearest hundredth of a mile).

To determine Rebecca's distance from the lodge at her current point, we can use trigonometry and the concept of vector addition.

Rebecca initially hikes 2.4 miles on a bearing of S79ºW. This means she moves 2.4 miles in the direction 79º west of south. We can represent this displacement as a vector:

Displacement 1 (D1) = 2.4 miles at S79ºW

Next, Rebecca changes her bearing to S24ºW and continues hiking for 4.8 miles. This represents a second displacement:

Displacement 2 (D2) = 4.8 miles at S24ºW

To find Rebecca's total displacement from the lodge, we need to add these two displacements together. This can be done by breaking each displacement into its north-south (y-axis) and east-west (x-axis) components.

For D1:

North-South component = 2.4 miles * sin(79º)

East-West component = 2.4 miles * cos(79º)

For D2:

North-South component = 4.8 miles * sin(24º)

East-West component = 4.8 miles * cos(24º)

Adding the corresponding components together, we can find the resultant north-south and east-west displacements. The distance from the lodge at this point can be calculated using the Pythagorean theorem:

Distance = √[(North-South displacement)^2 + (East-West displacement)^2]

After performing the calculations, the distance from the lodge at Rebecca's current point is approximately 5.24 miles (rounded to the nearest hundredth of a mile).

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Similar like magnets, opposites are drawn together. A magnet's north pole will adhere to another magnet's south pole. However, a magnet's north pole will push away from another magnet's north pole.

When two diametrically opposed poles combine, the same logic applies. The magnets are compelled to come together because of the intense attraction.

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The ball's weight will be precisely balanced by the electric field is E = 12.25 x 10³ N/C = 12.25 KN/C

The electrostatic force caused by the electric field must be equal to the weight of the body or charge in order to balance the object's weight. Therefore,

Weight = Electrostatic Force

E q = mg

where,

Electric field = (E) =?

5 x 103 kg is the mass of the charge, or m.

g = 9.8 m/s2 is the acceleration caused by gravity.

Q equals the charge's magnitude, which is 4 C (4 x 106 C).

Therefore,

E(4 x 10⁻⁶ C) = (5 x 10⁻³ kg)(9.8 m/s²)

E = 0.049 N/4 x 10⁻⁶ C

E = 12.25 x 10³ N/C = 12.25 KN/C

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The ball that is thrown directly downward with an initial speed of 7.05 m/s, from a height of 29.9 m. takes 3.29 s to strike the ground

The formula for the downward vertical launch and the procedure we will use is:

t = {V₀ + \(\sqrt{}\)[(V₀)² + 2*g*y]}/ g

Where:

Information about the problem:

With the information gave, we can calculate the time from the ball is thrown, using the formula of downward vertical launch:

t = {V₀ + \(\sqrt{}\)[(V₀)² + 2*g*y]}/ g

t = {7.05 m/s + \(\sqrt{}\)[(7.05 m/s)² + 2*9.8 m/s²*29.9 m]}/ 9.8 m/s²

t = {7.05 m/s + \(\sqrt{}\)[49.70 m²/s² + 586.04m²/s² ]}/ 9.8 m/s²

t = {7.05 m/s + \(\sqrt{}\)[635.74 m²/s² ]}/ 9.8 m/s²

t = {7.05 m/s + 25.214 m/s}/ 9.8 m/s²

t = 32.26 m/s/ 9.8 m/s²

t = 3.29 s

In physics vertical launch is the motion described by an object that has been launched vertically in which the acceleration is the earth's gravitational force.

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