a 9-kg uniform disk is attached to the 5-kg slender rod ab by means of frictionless pins at b and c. the assembly rotates in a vertical plane under the combined effect of gravity and of a couple m which is applied to rod ab. at the instant shown, the assembly has an angular velocity of 6 rad/s and an angular acceleration of 26 rad/s2, both counterclockwise.

(a) The value of C is 12.17 V/mm.

(b) The electric field is 27.04 N/m².

(c) The force is 1.90 x 10⁻¹⁷ N.

a) To determine the value of C, we first need to calculate x, which is the distance from the cathode to the anode. Using the given distance between the cathode and anode (13.6 mm), we can calculate x as 6.8 mm. We can then use this value of x, along with the given potential difference between the electrodes (264 V), to calculate the value of C using the equation C = V/x4/3:

C = 264 V/6.84/3 = 12.17 V/mm4/3

b) The electric field between the electrodes is given by Ex = -dV/dx. Using the result from part (a) for C and the given distance between the electrodes (13.6 mm), we can obtain a formula for Ex as a function of x:

Ex = -(12.17 V/mm4/3) x (4/3)x-5/3 =27.04 N/m²

c) The force on an electron when the electron is halfway between the electrodes can be calculated using the equation F = qEx, where q is the charge of the electron. Using the result from part (b) for Ex, we can calculate the force on an electron at x = 6.8 mm as:
F = -1.60 x 10⁻¹⁹ C x (-11.9 V/mm1/3)

F = 1.90 x 10⁻¹⁷ N

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If the amplitude is doubled than the intensity will become 4 times of amplitude.

Intensity is the quality of being very strong, concentrated or difficult or the degree to which something is difficult or strong.

The intensity of a sound wave exists described as the amount of energy transmitted through a unit area per unit time in the direction of travel; it is a vector quantity with both a magnitude and a direction.

The amplitude of the sound waves and how far they have travelled from the sound source.

Intensity is directly proportional to the square of the amplitude .

So, if the amplitude is doubled than the intensity will become 4 times of amplitude.

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Answer:

C)  10 m/s^2 toward the center of the planet

Explanation:

g = GM/r^2

The masses of earth and this planet are the same and the radius is only diffferent by 10% so as gravitational force acceleration is 9.8m/s^2 on earth, it can be estimated to be around 10m/s^2.

Using the third law, we know acceleration is toward the larger mass from attraction, thus having it point toward the center of the planet.

Answer:yes

Explanation:

According to the given statement In EEG brain waves the unit of amplitude is microvolts (mV)/ 10 e-6 V.

In most cases, amplitude is assessed by looking at a wave graph and determining the elevation of the pulse from rest. The amplitude or power of the wave is gauged by its amplitude. For instance, the height of a sound wave will indicate the volume of the sound.

The peak amount of a current or voltage is its amplitude. One or both of the sharp phases of a sine wave can be used to symbolize it. The peak voltage is another name for this voltage level, which might be positive or negative. Positive and negative solely describe the flow of current.

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When frozen at -31°F or lower for 15 hours at specific times and temperatures, raw, marinated, or partially cooked fish becomes safe.

Fish must be frozen to kill parasites that can spread disease whether it is raw, raw-marinated, partially cooked, or marinated and partially cooked. Cold smoking, pickling, or salting do not kill parasites. Separate utensils for each type of food must be offered in order to reduce the possibility of cross-contact and food contamination. To avoid using the same dishes or unclean utensils again for serving, there must be a enough supply of clean plates, cutlery, and serving utensils.

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Answer:

Colour of any object is by the colour of light it reflects i.e if white light is incident on the object,it will reflect blue color.so it will appear blue.But if red light is incident on it,it will not reflect that and absorb it.so as it will not reflect any light it will appear black.

Explanation:

Answer: power, renewable, extinct, solar, wind

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Answer:

chemical

mechanical

electrical

nuclear

thermal

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Among the listed individuals, Kepler had the most accurate view of the solar system.

Throughout history, various individuals contributed to our understanding of the solar system. However, when considering the accuracy of their views, Kepler's model stands out. Johannes Kepler, a German astronomer, formulated the laws of planetary motion based on careful observations and mathematical analysis.

Kepler's first law, known as the law of elliptical orbits, proposed that planets move around the Sun in elliptical paths, with the Sun located at one of the focal points. This model accurately described the motion of planets, unlike the circular orbits proposed by previous astronomers like Aristotle and Ptolemy.

Kepler's second law, the law of equal areas, stated that a planet sweeps out equal areas in equal time intervals as it orbits the Sun. This law explained how the speed of a planet changes as it moves along its elliptical path.

Finally, Kepler's third law, the harmonic law, established a mathematical relationship between a planet's orbital period and its average distance from the Sun. This relationship provided a fundamental understanding of the structure and behavior of the solar system.

Overall, Kepler's contributions to our understanding of the solar system, particularly his laws of planetary motion, make his view the most accurate among the individuals listed.

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Answer: The anser is C

Explanation:

It is the same if no external forces are added.

Based on the principle of conservation of linear momentum, the final total momentum of both carts compared to the initial total momentum is the same if no external forces are added.

The given information;

According to the principle of conservation of linear momentum, the total momentum before collision is equal to the total momentum after collision.

m₁u₁ + m₂u₂ = m₁v₁ + m₂v₂

where;

Thus, based on this principle (conservation of linear momentum), the final total momentum of both carts compared to the initial total momentum is the same if no external forces are added.

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The first plateau represent would be b) the boiling point of the pure solvent.

Boiling point is the temperature (temperature) at which the vapor pressure of a liquid is equal to the external pressure experienced by the liquid. A liquid in a vacuum will have a lower boiling point than if it were under atmospheric pressure. Liquids that are under high pressure will have a higher boiling point than their boiling point at atmospheric pressure.

The normal boiling point (also called atmospheric boiling point) of a liquid is the special case where the vapor pressure of the water is equal to the atmospheric pressure at sea level, one atmosphere.

At this temperature, the vapor pressure of the liquid can overcome atmospheric pressure and form bubbles within the liquid mass. At this time (as of 1982) the Boiling Point Standard determined by the IUPAC is the temperature at which boiling occurs at a pressure of 1 bar.

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Given, the position of an object in circular motion is modeled by the parametric equations: x = 5 sin(t) and y = 5 cos(t).

To describe the path of the object:

Radius of the circle:

We can obtain the radius of the circle by using the relation: r² = x² + y²=> r² = (5sin t)² + (5cos t)²=> r = 5Position at time t = 0:

When t = 0, we have x = 5 sin(0) = 0 and y = 5 cos(0) = 5.

The position of the object is at (0, 5) at time t = 0.

Orientation of the motion: We know that sin and cos functions are periodic with period 2π radians.

Hence, we can say that the object completes one revolution around the circle in 2π seconds.

Since x = 5 sin(t) and y = 5 cos(t) represent the equations of a circle with radius 5, it is clear that the path of the object is a circle with center at (0,0) and radius 5 units.

The orientation of the motion is counterclockwise.

Therefore, the path of the object is a circle with center at (0,0) and radius 5 units. The position of the object at time t = 0 is (0, 5).

The orientation of the motion is counterclockwise.

The time t it takes to complete one revolution around the circle is 2π seconds.

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Answer:

Density= 2.78 g/cm³

Relative density=2.8

Explanation:

To calculate the density of the cube we have to use the formula ρ=mass/volume

ρ stands for density.

So now we don't have the volume of the cube and to find the volume of the cube we have to use the formula a³

3³= 9 cm³

Now plug in the values. ρ= 25 g/9 cm³

ρ= 2.78 g/cm³

To find the relative density, we have to use the formula ρsample/ρH20

The sample means the density of the substance earlier. We do not know the density of water but it is constant at 997 kg/m³.

Now we have to make the units same so you change the unit of the density of cube to kg/m³

So, 25/1000= 0.025 kg

9/100×100×100 (because cm³ which means that there should be 3 meters to change the unit and to conver cm to meter we need to divide by 100 so 9cm/100, 9cm²/100×100, 9cm³/100×100×100)

=0.000009 m³

The new density= 0.025 kg/ 0.000009 m³

= 2777.78 kg/m³

Now plug the values into the formula:

relative density= 2.777.78 kg/m³ / 997 kg/m³

=2.8

There is no unit since kg/m³ and kg/m³ cancels

Answer:

Enrique is the correct answer Hope it helps you have a good day

Answer:

enrique is correct

Explanation:

thw earth is bigger than the moon and closer to the sun therefore a shadow is cast from the earth onto the moon as it orbits around the earth

I expect the suspended magnet to align itself antiparallel to a stationary magnet. This is because magnets have two poles: north and south.

When you bring two magnets close to each other, opposite poles (north-south) attract, and like poles (north-north or south-south) repel.

In an antiparallel alignment, the north pole of the suspended magnet will face the south pole of the stationary magnet, and the south pole of the suspended magnet will face the north pole of the stationary magnet.

This arrangement allows for the attractive forces between the opposite poles, causing the magnets to align antiparallel to one another.

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Answer:

It is the inability of the body to change by itself its state of rest or uniform motion or direction. Types of Inertia- It is of three types-(1)Inertia of rest (2) Inertia of motion(3) Inertia of direction. (1) Inertia of rest - It is the inability of the body to change by itself its state if rest.

Answer:

Water is omnipresent in our environment on a global scale: in the seas, oceans, lakes, rivers, in glaciers and ice floes... but also in the atmosphere (clouds,

Rain, hail, snow, water vapor...). Water is also omnipresent in our environment

Daily: water to drink, to cook, to wash...

Answer:

heart, lungs, blood vessels

Explanation:

Answer:

The pound originally was 12 oz, but was increased to 15 and then 16 oz later. One should remember that the weights on the scales were marked in oz, of 1, 2, 4, 8, &c, and in one case, the 16 oz simply became the pound.

Explanation:

Hope this helps

Answer:

The mass of the apple is 0.49kg

Explanation:

Potential energy=mgh

P=mgh

6=m×1.22×10

6=12.2m

divide both sides by 12.2

m=6/12.2

m=0.49kg

The impulse is 13.5 N-s.

As we know that impulse is a sudden force acting on a body for a short time interval is called Impulse.

                                Δp = FΔt  

Mathematically, the change in momentum will equal impulse.

                                Δp = mΔv

                   →           Δp =  0.145(49-(-44))

                   →           Δp = 0.145(93)

                               Δp =  13.5 Newton-second

Thus, option (e) is correct.

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Answer:

Polonium(Po)

Explanation:

Answer:

B. polonium (Po)

Explanation:

i took the test

If a pitcher wants to throw two balls requiring the same amount of work to throw, the ball without spin (Ball B) will travel faster toward home plate.

(a) Ball A, which is spinning rapidly, has more total mechanical energy because rotational kinetic energy is added to its translational kinetic energy. The spin contributes to the overall energy of the ball.

(b) Ball A, which is spinning rapidly, requires more work to throw because the rotational motion adds an additional component of kinetic energy that needs to be provided by the pitcher.

(c) If a pitcher wants to throw two balls requiring the same amount of work to throw, the ball without spin (Ball B) will travel faster toward home plate. This is because the absence of spin allows for better aerodynamic efficiency, reducing air resistance and allowing the ball to maintain higher translational speed.

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Answer:

2.5 Hz

Explanation:

3.0m/s / 1.2 m=2.5 1/s=2/5 Hz

The frequency of a wave with speed of 3.0 m/s and has a wavelength of 1.2m is 2.5 Hz.

The frequency of a wave is the number of cycles per second.

Given the wavelength is 1.2 m and speed v =3.0m/s, then the frequency of the wave is

v =fλ

f = 3 / 1.2

f = 2.5 Hz

Thus, the frequency of the wave is 2.5 Hz.

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E = k * (Q / r²). Where E is the electric field intensity, k is the Coulomb's constant (9 x 10⁹ N ), Q is one of the rings' charges, and r is the distance between their centres. The electric field strength is 3125 N/C.

Thus, the distance between the centres of the two rings is r = 24.0 cm, and both rings have the same charge, Q = 20.0 nC.

Transforming the charge from nano Coulombs to Coulombs first Q = 20.0 nC = 20.0 x 10⁹ C

The strength of the electric field:

E = [(20.0 x 10-⁹ C) / (24.0 x 10-2 m)] * [(9 x 10 ⁹)

E = (9 x 10⁹ ) * (20.0 x 10⁹) / (0.24)

E = (9 x 10⁹) * (20.0 x 10⁹ C) / 0.0576

E ≈ 3125 N/C.

Thus, E = k * (Q / r²). Where E is the electric field intensity, k is the Coulomb's constant (9 x 10⁹ N ), Q is one of the rings' charges, and r is the distance between their centres. The electric field strength is 3125 N/C.

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Answer:

It's change will form the nitride ion

Answer:

The magnitude of the boy's displacement is 24.698 paces which is in the direction of approximately 58.24° North of East

Explanation:

The given parameters are;

The distance West the boy on a treasure hunt walks = 12 paces

The distance North the boy on a treasure hunt then walks = 21 paces

The distance East the boy on a treasure hunt then walks = 25 paces

Writing the displacement in vector format, gives;

d = -12·i + 21·j + 25·i

Which gives

d = 13·i + 21·j

The magnitude of the boy's resultant displacement is given as follows;

\(\left | \mathbf{d} \right | = \sqrt{d_x^2 + d_y^2}\)

Where;

\(d_x = 13, \ d_y = 21\)

\(\left | \mathbf{d} \right | = \sqrt{13^2 + 21^2} = \sqrt{610} \approx 24.698 \ paces\)

The magnitude of the boy's displacement is 24.698 paces

The direction of the displacement is tan⁻¹(21/13) ≈ 58.24° North of East.

Explanation:

a.)

Reactants : CO2 (carbondioxide) + H2O (water)

Products : O2 (oxygen) + C6H12O6 (glucose)

b.)

Reactants: Na ( Solid Hydrogen) + H2O (water)

Products: H2 (hydrogen gas) + NaOH (sodium hydroxide)