the time constant of an rc circuit is 8.0 s. how much time t is required for the capacitor (uncharged initially) to gain one-half of its full equilibrium charge?

Copernicus's model of the universe differs from Ptolemy's because Copernicus believed the Sun is at the center of the universe and majority of the bodies in the universe revolves around the Sun.

The universe is defined as the open place that contains the planets, stars, galaxies, and all other forms of matter and energy.

There are different models of the universe including which contains the Copernicus's model and Ptolemy's model.

The Copernicus's model of the universe differs from Ptolemy's because Copernicus believed the Sun is at the center of the universe and majority of the bodies in the universe revolves around the Sun.

While the Ptolemy's model of the universe differs from the Copernicus's model because Ptolemy believed that the Earth is at the center of the universe and everything in the universe revolves around the Earth.

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Answer:it’s c

Explanation:

Answer:

an unstable atomic nucleus emits energy

Explanation:

just toke quiz

(a) The distance travelled by the sled before stopping is 0.15 m.

(b) The magnitude of force would be necessary to maintain constant velocity​ is 97.86 N.

The acceleration of the sled is calculated by applying  Newton's second law of motion as follows.

F (net) = ma

where;

Fₓ = ma

F cosθ = ma

where;

80 cos(30) = 20a

69.28 = 20a

a = 69.28 / 20

a = 3.46 m/s²

The distance travelled by the sled is calculated as follows;

v² = u² - 2as

where;

2as = u²

s = u² / 2a

s = (1²) / (2 x 3.46)

s = 0.15 m

The force needed to maintain a constant velocity is calculated as follows;

F cos(45) - Ff = ma

at constant velocity, acceleration = 0

F cos(45) - Ff = 0

F cos(45)  = Ff

F cos(45) = (20 x 3.46)

F = (20 x 3.46) / cos(45)

F = 97.86 N

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Answer:

20 yards East

Explanation:

The question states he starts at the 50 yard line, and didn't imply that he'd ran for 50 yards already. Effectively, that said 50 yard would not count.

The question proceeded to saying he ran leftwards for 20 yards. This is the distance, or displacement that we would use as the first measurement. Running 20 yards in the Eastern direction.

The question then proceeded again, to saying he ran rightwards for another 40 yard. By so doing, he eclipsed the initial 20 yards he'd ran. And added few more yards..

40 - 20 = 20, meaning, he ran 20 more yards in the rightward direction.

Therefore, his displacement would be 20 yards to his right or say, Eastern direction.

Answer:

Nothin will move, it will stay the same since no force is greater than the other. it's "the same amount of force" which also means an equal amount of force

Explanation:

The forces are only equal if there is no acceleration (which in the game of tug of war, accelerating yourself and your opponent is the idea). If the force on the rope and the ground are both equal either nothing moves or some other force is being applied in the system.

Hope this helped!

Answer: The brain

Explanation:

The brain is an ideal reservoir for our bodies. That is the main one.

The possible distance from the person to the other speaker is c) 8.1m

To determine the possible distance we first convert the frequency from kHz to Hz as follows;

As 1 kHz = 1000 Hz

Therefore; 0.50 kHz = 0.50 × 1000 = 500 Hz

Now we determine the wavelength as follows;

wavelength = v ÷ f

wavelength = 340 ÷ 500

wavelength = 0.68 meters

Half wavelength = 0.5 × wavelength = 0.5 × 0.68 = 0.34 meters

For the sound interference to be destructive, the second source must be an odd multiple of 1/2 wavelength away from the first, therefore we calculate the possible distance from the person to the other speaker as follows;

distance between the person and speaker + odd multiple of wavelength = possible distance from other speaker

5 m + 0.34 m = 5.34 m

5 m + 3 × 0.34 m = 6.02 m

5 m + 5 × 0.34 m = 6.7 m

5 m + 7 × 0.34 m = 7.38 m

5 m + 9 × 0.34 m = 8.06 m  

5 m + 11 × 0.34 m = 8.74 m

The value closest to any options provided above is 8.06 m therefore the correct option is 8.1 m.

Although a part of your question is missing, you might be referring to this question:

Two speakers are placed side by side and driven by the same frequency of 0.50 kHz. If the distance from a person to one speaker is 5.0 m and the person detects little or no sound, which of the following is a possible distance from the person to the other speaker? The sound speed in the room is 340 m/s

a) 8.4 m

b) 9.1 m

c) 8.1 m

d) 7.7 m

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Answer:Density = 7.5 g/ml (By putting the given values.) [ The ratio of the mass to volume is the density, that's why the unit of the density is also the ratio of the unit of mass to the unit of volume. ] Hence, the density of the object is 7

Explanation: Google

A simple test to determine the overall amount of particles of extremely small size in a water sample is the turbidity test.

The simple test to determine the overall amount of particles of extremely small size in a water sample is known as a turbidity test.

Turbidity is a measure of the cloudiness or haziness of a fluid caused by the presence of suspended particles, such as sediment, algae, or other microscopic matter.

The test involves shining a light through a water sample and measuring the amount of light that is scattered or absorbed by the particles in the water.

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Answer:

V = 72000 volts

Explanation:

calculates the electric potential of a point B that is 75cm from a positive charge q = 9 × 10-6c

Given that,

Electric charge, \(q=9\times 10^{-6}\ C\)

We need to find the electric potential of a point B that is 75 cm from this charge. The formula for the electric potential is given by :

\(V=\dfrac{kq}{r}\\\\V=\dfrac{9\times 10^9\times 6\times 10^{-6}}{0.75}\\\\V=72000\ V\)

So, the electric potential is equal to 72000 Volts.

The charge on each coin is equal to \(2.50 \times 10^{-10}\;Coulomb\)

Given the following data:

To determine the charge on each coin, we would apply the law of electrostatic forces:

Mathematically, the law of electrostatic forces is given by the formula:

\(F = \frac{kq_1q_2}{r^2}\)

Note: \(q_1 = q_2\) (since the coin carry identical electric charges).

Therefore, the formula becomes:

\(F = \frac{k(2q)}{r^2}\)

Making q the subject of formula, we have:

\(q=\frac{Fr^2}{2k}\)

Substituting the given parameters into the formula, we have;

\(q=\frac{2 \times 1.5^2}{2 \times 8.99 \times 10^9}\\\\q=\frac{2 \times 2.25}{2 \times 8.99 \times 10^9}\\\\q=\frac{4.5}{17.98 \times 10^9}\\\\q=2.50 \times 10^{-10}\;Coulomb\)

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Answer:

v = 14.32 m/s

Explanation:

According to the principle of conservation of linear momentum, both the momentum and kinetic energy of the system are conserved. Since the two balls are in the same direction of motion before collision, then;

\(m_{1} u_{1}\) + \(m_{2} u_{2}\) = (\(m_{1}\) + \(m_{2}\)) v

0.035 × 12 + 0.120 × 15 = (0.035 + 0.120) v

0.420 + 1.800 = (0.155) v

2.22 = 0.155 v

⇒ v = \(\frac{2.22}{0.155}\)

      = 14.323

The velocity of the balls after collision is 14.32 m/s.

The number of revolutions that the wheel has to make to travel 4.55 miles is 3214 revolutions.

The number of revolutions made by a circle of radius r to cover a distance s is s= 2 πr. In covering a distance s m, a circular wheel of radius r m makes s2πr revolution.

The diameter of the wheel is 725mm or 0.725 m. The distance the wheel has to go is x=4.55 miles or 7323 m.

The circumference of the wheel is πD where D is the diameter. Therefore the number of revolutions to travel distance X is no. of revolution = X/(πD). So if D = 0.725m  and X = 7323m. Then the number of revolutions = 7323/(π x 0.725) = 3213.85 revolutions or 3214 revolutions.

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Physical and mental training helps to increase endurance.

It should come as no surprise that helping your body will also benefit your mind. Your brain receives more oxygen when you exercise. Additionally, it raises your brain's levels of endorphins, or "feel-good" chemicals. This is why it makes sense that those who maintain a healthy physical state also frequently exhibit higher levels of mental agility.

Exercise your mind just as much as your body. A study published in the Proceedings of the National Academy of Sciences claims that specific memory workouts can improve "fluid intelligence," or the capacity to reason and solve novel challenges.

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David Popenoe's research suggests that the weakest families on earth may be found in Western, industrialized nations.

Industrialized countries such as America, France, the United Kingdom, and other Western nations have weaker family values and structures than developing nations, according to David Popenoe's research. The family's crucial role in society's economic, social, and emotional stability has long been recognized by social scientists.

Popenoe's research supports the notion that Western, industrialized societies may be experiencing a family crisis.Popenoe says that family disintegration and weakening is a serious social problem in the Western world. Popenoe's studies found that Western societies, which place a high value on independence, individualism, and personal satisfaction, are at odds with the family's objectives of commitment, obligation, and selflessness.

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To explain the tangent plane to the surface, `z = 53 − x² − 2y²` at the point `(3, 2, 6)`, let us first determine the partial derivatives of `z` with respect to `x` and `y`.

Partial derivative of `z` with respect to `x`, `∂z/∂x = -2x`Partial derivative of `z` with respect to `y`, `∂z/∂y = -4y`Now, let's find the gradient vector `grad z` at `(3, 2, 6)` and the value of `z` at `(3, 2)`.gradient vector `grad z = (-2x, -4y, 1)`gradient vector `grad z = (-6, -8, 1)` at `(3, 2, 6)`.Value of `z` at `(3, 2)` is given by `z = 53 - 3² - 2(2)² = 39`.

Therefore, the equation of the tangent plane to the surface `

z = 53 − x² − 2y²` at `(3, 2, 6)` is:

`z - 6 = -6(x - 3) - 8(y - 2)`

which can be written as:`6x + 8y + z = 50`Thus, the equation of the tangent plane to the surface `z = 53 − x² − 2y²` at the point `(3, 2, 6)` is `6x + 8y + z = 50`.

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Answer:

0.17 s

Explanation:

Given:

Δy = 0.15 m

v₀ = 0 m/s

a = 9.8 m/s²

Find: t

Δy = v₀ t + ½ at²

0.15 m = (0 m/s) t + ½ (9.8 m/s²) t²

t = 0.17 s

The length of the rubber band that the boy must use is 0.024 m or 24 mm.

To determine the length of the rubber band, we can use the formula for the potential energy stored in a stretched spring, which is also applicable to a stretched rubber band:

where U is the potential energy stored in the rubber band, k is the spring constant (or in this case, the rubber band constant), and x is the displacement of the rubber band from its natural length.

Since the rubber band is stretched by 0.25 of its natural length, the displacement x is 0.25 times the natural length of the rubber band.

We can solve for the rubber band constant k by using the formula for the velocity of a projectile launched by a spring (or in this case, a rubber band):

where v is the velocity of the projectile, m is the mass of the rubber band, M is the mass of the projectile, and k is the spring constant. We can rearrange this equation to solve for k:

k = (v² M) / (2 m)

We can now combine the two equations to solve for the length of the rubber band, L:

U = 1/2 k x²

U = 1/2 ((v² M) / (2 m)) (0.25 L)²

U = (v² M L²) / (32 m)

The potential energy stored in the rubber band must be equal to the kinetic energy of the projectile when it is launched:

U = 1/2 M v²

(v² M L²) / (32 m) = 1/2 M v²

L = ((16 m v²) / (k M))

L = ((16 m v²) / ((v² M) / (2 m) M))

L = √(32 m^2 / M)

L = (0.032 M)

Substituting the given values, we get:

L = √(0.032 * 0.006)

L = 0.024 m

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The formula to calculate the wavelength of light passing through a diffraction grating or double-slit aperture is: λ = d * sin(θ) / m, where λ is the wavelength of light, d is the distance between the slits or gratings, θ is the angle between the central maximum and the mth order maximum, and m is the order of the maximum.

To use this formula, we need to know the distance between the slits or gratings, the angle of diffraction, and the order of the maximum. The angle of diffraction can be measured by observing the interference pattern produced by the grating or aperture.

Once these values are known, we can plug them into the formula to calculate the wavelength of the light passing through the aperture.

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Answer:

both magnesium and strontium have 2 valence electrons

Explanation:

potassium has 8 valence electrons, and nitrogen has 5.

Answer:

velocity is the rate of change of distance moved with a time in a specific direction. While speed is the rate if distance with time in no specific direction

The average force on the puck by the stick is 448 N

To find the average force on the hockey puck, we can use the impulse-momentum theorem:

Impulse = Change in momentum

The impulse on the puck can be calculated as:

Impulse = mass x change in velocity
Impulse = 0.16 kg x (9 m/s - (-5 m/s))
Impulse = 0.16 kg x 14 m/s
Impulse = 2.24 N*s

The change in velocity is negative because the puck is moving in the opposite direction after the impact.

The impulse on the puck is equal to the average force multiplied by the time of contact:

Impulse = average force x time
2.24 N*s = average force x 0.005 s
average force = 2.24 N*s / 0.005 s
average force = 448 N

Therefore, the average force is 448 N.

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Answer:

The answer is Insulator, Conductor

Explanation:

A/An Insulator is a material in which charges will not move easily, whereas a/an Conductor is a material that allows charges to move about easily

A planes average speed between two cities is 610 km/hr. If the trip takes 2. 25 hrs, then the distance covered by a plane is  1372.5 kilometers.

To calculate the distance the plane flies, we can use the formula:

Distance = Speed × Time

Given that the average speed of the plane is 610 km/hr and the trip takes 2.25 hours, we can substitute these values into the formula to find the distance.

Distance = 610 km/hr × 2.25 hrs

To multiply these values, we need to align the units correctly. By canceling out "hrs" in the numerator and denominator, we get:

Distance = 610 km × 2.25

Multiplying 610 km by 2.25 gives us:

Distance = 1372.5 km

Therefore, the plane flies a distance of 1372.5 kilometers.

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Given that a plane's average speed between two cities is 610 km/hr and the trip takes 2.25 hrs. We are to find the distance covered by the plane The plane flies 1372.5 km

Let's find the solution to this problem .The formula for distance, speed and time isd

= s * there,

d = distance covered by the planes

= speed t

= time taken

Substituting the given values, we have610 × 2.25 = 1372.5 km

Hence, the plane flies 1372.5 km.

Given that a plane's average speed between two cities is 610 km/hr and the trip takes 2.25 hrs. We are to find the distance covered by the plane

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