A ceiling fan with 28-in. blades rotates at 45 rpm. (a) Find the angular speed of the fan in rad/min. 907 rad/min (b) Find the linear speed of the tips of the blades in in./min. 7916 in/min x

Answer:

C.

Explanation:

It's just C.

If the gravitational potential energy decreases, then the kinetic energy of the pendulum must increase. Therefore, option (C) is correct.

Gravitational potential energy is the energy acquired by an object in a gravitational field due to a change in its position. Gravitational potential energy is an energy that is related to gravity or gravitational force.

When a body of mass (m) is moved inside the gravitational influence of a source mass (M) without accelerating it. The work done is stored in the form of potential energy is known as gravitational potential energy.

The law of conservation of mechanical energy indicates that the mechanical energy of a pendulum remains constant when all the forces acting on it are conservative.

Therefore, if the gravitational potential energy of the pendulum decreases, the kinetic energy will increase. Therefore, option (c) is correct.

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Hi there!

The period of an oscillation is the amount of time taken by the object to go back to its ORIGINAL position.

The block is at + 0.10 m at t = 0.0 s and t = 1.80 s.

Thus, the period of the oscillation is 1.80 sec.

The frequency range of electromagnetic waves of X-ray is 3 ×10¹⁶ Hz to  3 ×10¹⁹ Hz. The wavelength range of electromagnetic waves of X-ray is  0.01 nm t0 10 nm.

The electromagnetic spectrum of electromagnetic waves can be described as the range of frequencies of electromagnetic radiation and its wavelengths and photon energies. The electromagnetic spectrum have range from one Hertz to above 10²⁵ Hertz.

The wavelength of electromagnetic radiation lies in between 380 to 760 nm and is detected by the human eye and characterized as visible light.

Electromagnetic waves of each frequency band are known by different names; starting at the low frequency (long wavelength) end of the spectrum these are radio waves, microwaves, infrared (IR), visible light, UV, X-rays, and gamma rays at the high-frequency (short wavelength) end.

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If the final potential difference across the 69micro -f then capacitor is 40Mf

We cannot expect simple energy conservation to hold because energy is presumably dissipated as heat in the connection wires or as radio waves while the charge oscillates during the system "settling down" to its final state (40V across the parallel pair of capacitors C and 60 F).

We anticipate that charge will be conserved. Thus, if Q is the initial charge stored on C and q 1 and q2 are the charges on the parallel pair after "settling down," then -

Q= q1+ q2

C(100V) = C(40V) + 60mf(40V)

C= 40Mf

An electrical component that stores electrical energy in an electric field is known as a capacitor. It is made up of two conductive plates separated by a nonconductive material known as a dielectric.

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Given that

heat capacity of water = 4200

heat capacity of aluminium = 897

heat capacity of oil = 1900

heat capacity of gold = 129

Heat capacity is the amount of heat a material absorbs to increase its temperature by 1 degree Celsius.

So, larger the heat capacity of a material lower will be the temperature change.

If equal amount of energy is applied to the materials, then gold will have the greatest temperature change as its heat capacity is lowest than other materials.

Magnitude of the tension in the upper rope = 55.4 N

Given,

Mass of the object (m) = 3.90Kg

Tension in the lower string (T₂) = 17.2 N

Let Tension in the upper string (T₁) = T₁

The object is suspended at rest, so all forces on it are balanced. This gives us the equation :

                              T₁ = T₂ + W

Where W = mg (weight of the body)

T₁ = 17.2 N + 3.90 × 9.81 m/s²

   =  17.2 N + 38.259 N

  =  55.4 N

There the magnitude of tension in the upper rope is 55.4N.

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To find the time required for the cheerleader's pom-pom to move from the equilibrium position to a point a distance of 11.2 cm away, we can use the formula for the period of simple harmonic motion (SHM):

T = 1/f

T = 1 / 0.900 Hz

T ≈ 1.111 s

where T is the period and f is the frequency. In this case, the frequency is given as 0.900 Hz.

Plugging in the values:

T = 1 / 0.900 Hz

Calculating the reciprocal of the frequency:

T ≈ 1.111 s

The period represents the time required for one complete cycle of motion. Since we want to find the time for the pom-pom to move from the equilibrium position to a point 11.2 cm away, we can divide the period by 4, as this corresponds to one-fourth of a complete cycle.

Time required = T / 4

Time required ≈ 1.111 s / 4 ≈ 0.2778 s

Therefore, the time required for the pom-pom to move from the equilibrium position to a point 11.2 cm away is approximately 0.2778 seconds.

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Answer:

i think it was kneading because of that constant gravitational war between two interstellar celestial bodies one is also molding the other with its gravitational force so that way between the moon and the earth is a gravitational war between the two objects

Explanation: DO BE WARNED . i am not 100% sure if this was the correct term or not so please do consider this warning.

Approximately 1.298 x 10^21 electrons leave the 4.5 V battery per minute when connected to a bulb with a resistance of 1.3 Ω.

To calculate the number of electrons leaving the battery per minute, we first need to determine the current flowing through the circuit. Using Ohm's Law (I = V/R), where V is the voltage (4.5 V) and R is the resistance (1.3 Ω), we find that the current is approximately 3.46 A.

Next, we calculate the total charge passing through the circuit by multiplying the current by the time in seconds. Assuming a time of 60 seconds (1 minute), the charge (Q) is equal to 207.6 C.

To determine the number of electrons, we convert the charge to Coulombs. One Coulomb is equivalent to the charge of approximately 6.24 x 10^18 electrons.

Dividing the total charge by the charge of a single electron, we find that approximately 1.298 x 10^21 electrons leave the battery per minute when connected to the given bulb.

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Answer:

59, 720 Joules

Explanation:

\(q = mc(t2 - t1) + m(lf) + mc(t2 - t1)\)

first term=ice to 0 degrees

second term=water to ice

third term-water to 30 degrees

\(q = 0.12 \times 2100 \times 20 + 0.12 \times 3.36 \times {10}^{5} + 0.12 \times 4200 \times 30\)

\(q = 59720 \: joules\)

The ping pong ball gets more friction from the floor and it reduces the kinetic energy of a moving object by change it into heat energy. Therefore, the statement is true.

Friction is a kind or force which resist the motion of a body. Friction results from the close contact between two surfaces and it increases when they rub together.

Friction opposes the force which makes the displacement of a body. Hence it is given a negative sign. Kinetic energy of a body is generated by virtue of its motion.

When friction acts on an object due to roughness in surface, it converts the kinetic energy of the moving object to heat energy loss. Thereby, the object fails to move smoothly.

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Explanation:

Light rays that pass close to the black hole get caught and cannot escape. so what ends up happening to the light is that it starts bending due to the strong gravitational force of the black hole.

Answer:

6 the number infront of H2O is the amount of molecules it is

Explanation:

Answer:

1) The ball will land approximately 141.4 m away from where it was kicked

2) The maximum height reached is approximately 61.22 m

3) The total hang time is approximately 7.07 seconds

Explanation:

First we list out the known parameters

The direction in which the punt is kicked, θ = 60°

The speed with which the punk is kicked, v₀ = 40 m/s

1) The distance away (the range, R) the ball will land is given by the equation;

\(R = \dfrac{v_0^2 \times sin(2\cdot \theta)}{g}\)

Where;

g =  The acceleration due to gravity = 9.8 m/s²

Substituting the values, gives;

\(R = \dfrac{40^2 \times sin(2\times60^{\circ })}{9.8} \approx 141.4 \ m\)

The distance away the ball will land ≈ 141.4 m

2) The maximum height is given m=by the following equation for vertical motion;

(v₀ × sin(θ))² = 2 × g × \(h_{max}\)

Obtained from the equation of motion, v² = u² - 2×g×h where at maximum height;

v = 0 at maximum height, the ball stops upward motion

h = Height of motion = \(h_{max}\) at maximum height

v, and u are the vertical component of the velocity, v₀

Substituting the values in the equation for the maximum height, gives;

(40 × sin(60))² = 2 × 9.8 × \(h_{max}\)

(40 × (√3)/2)² = 1200 = 19.6 × \(h_{max}\)

1200 = 19.6 × \(h_{max}\)

\(h_{max}\) = 1200/19.6 ≈ 61.22 m

The maximum height reached ≈ 61.22 m

3) The time to maximum height is given by the following equation of motion;

\(v_y\) = v₀ × sin(θ) - g × t

\(v_y\) = 0 at maximum height

We therefore have;

v₀ × sin(θ) = g × t

t =  v₀ × sin(θ)/g = 40 × sin(60°)/9.8 = (40 ×(√3)/2)/9.8 = 3.535 seconds

Given that the motion of the ball is symmetrical about the maximum height, we have;

The time from ground level to maximum height = The time from the maximum height back to the ground level

The total time hang time = The time from ground level to maximum height + The time from the maximum height back to the ground level

The total time hang time ≈ 3.535 + 3.535 ≈ 7.07 seconds.

The total time hang time ≈ 7.07 seconds.

The statement "Stars vary greatly in temperature" (option A) is true about stars.

Stars are massive, luminous spheres of plasma held together by their own gravity. They are the fundamental building blocks of the universe and are responsible for the creation of all heavy elements and the energy that powers all life on Earth.

Stars can have a wide range of temperatures, from as low as 2,000 Kelvin (K) for cooler red dwarfs to over 30,000 K for hotter blue giants. The temperature of a star is closely related to its color, with cooler stars appearing reddish in color and hotter stars appearing bluish in color.

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Complete question:

Which of the following statements about stars is true?

A. Stars vary greatly in temperature.

B. Stars rarely differ in temperature.

C. All stars are the same temperature.

D. none of these

Answer:

Potential energy

Explanation:

Potential energy is stored energy and the energy of position––gravitational energy. There are several forms of potential energy. Electrical Energy is the movement of electrical charges. Everything is made of tiny particles called atoms.

- Scientific Forms of Energy_ Stored Energy, Kinetic Energy ...ei.lehigh.edu › learners › energy › readings › energy_basics

The object on the right needs a minimum speed of approximately 22.5 m/s to collide with the object on the left. At the instant of collision, the object on the left will have a velocity of approximately 31.1 m/s.

a. The collision between the two objects will occur at a position located between their initial positions. Since the object on the left is thrown at an angle of 40 degrees above the horizontal, its horizontal velocity will be given by v_x = v * cos(40), where v is the initial speed of 45 m/s.

The time taken for the object on the left to reach the collision point can be determined using the horizontal velocity and the distance between the objects. The vertical position of the object on the left at this time can be found using the equation y = v_y * t - (1/2) * g * t^2, where v_y is the vertical velocity at launch and g is the acceleration due to gravity. By substituting the known values, the horizontal and vertical positions can be obtained.

b. To find the minimum speed required for the object on the right to collide with the object on the left, we need to calculate the vertical speed at which it should be thrown upwards. At the point of collision, the horizontal position of the object on the right will be the same as that of the object on the left.

Using the known horizontal distance and the time taken for the object on the left to reach this position, the time can be determined. The vertical position of the object on the right can be found using the equation y = v_y * t - (1/2) * g * t^2. By substituting the known values, the required vertical speed can be calculated.

c. At the instant of collision, the object on the left will have a velocity composed of both horizontal and vertical components. The horizontal velocity will remain constant throughout the motion, while the vertical velocity will change due to the acceleration of gravity.

The magnitude of the velocity vector at the instant of collision can be calculated using the equation v = sqrt(v_x^2 + v_y^2), where v_x is the horizontal velocity and v_y is the vertical velocity at the collision point. By substituting the known values, the velocity of the object on the left at the instant of collision can be determined.

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Surface ocean water in the Northern Hemisphere moves clockwise.

Surface ocean water in the Southern Hemisphere moves counterclockwise.

The Earth rotates on its axis which leads to circulation of air that is deflected toward the right in the Northern Hemisphere and toward the left in the Southern Hemisphere. This deflection is called the Coriolis effect. Coriolis effect result in the rotation of Earth on weather patterns and ocean currents. The Coriolis effect makes storms swirl clockwise in the Southern hemisphere and counterclockwise in the Northern Hemisphere. The force that describe the paths of objects on rotating bodies. The main cause of the Coriolis effect is the Earth's rotation. As the Earth spins in a counter-clockwise direction on its axis, things flying and flowing over a long distance above its surface is deflected.

So we can conclude that Earth is a spinning planet, and its rotation affects climate, weather, and the ocean through the Coriolis effect.

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The spin of Earth creates the Coriolis effect. This effect causes which current patterns to occur? Choose all that apply

Surface ocean water in the Northern Hemisphere moves clockwise.

Surface ocean water in the Southern Hemisphere moves clockwise.

Surface ocean water in the Northern Hemisphere moves counterclockwise.

Surface ocean water in the Southern Hemisphere moves counterclockwise.

Surface ocean water moves clockwise in both hemispheres.

Surface ocean water moves counterclockwise in both hemispheres

The resultant velocity of the athlete is 19.7m/s at a bearing of 24.9⁰.

Step 1: Draw the vector diagram

The first step is to draw a vector diagram that depicts the athlete's velocity (18m/s due east) and the wind's velocity (8m/s at a bearing of 230⁰).

Step 2: Draw the resultant vector

Now, we draw the resultant vector from the tail of the first vector to the head of the second vector.

This gives us the resultant velocity of the athlete after being impacted by the wind.

Step 3: Calculate the magnitude and direction of the resultant vector

Using the triangle of vectors, we can calculate the magnitude and direction of the resultant vector.

The magnitude is the length of the vector, while the direction is the angle between the vector and the horizontal axis.

We can use trigonometry to calculate these values.

In this case, we have a right triangle, so we can use the Pythagorean theorem to calculate the magnitude of the resultant vector: \(R^{2} = (18m/s)^{2} + (8m/s)^{2} R^{2} = 324 + 64R^{2} = 388R = \sqrt{388R} = 19.7m/s\)

To calculate the direction of the resultant vector, we can use the inverse tangent function: Tanθ = Opposite/AdjacentTanθ = 8/18Tanθ = 0.444θ = tan⁻¹(0.444)θ = 24.9⁰

Therefore, the resultant velocity of the athlete is 19.7m/s at a bearing of 24.9⁰.

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Answer: parasitic organisms cause harm to other organisms.

Answer:

parasitic organisms cause harm to other organisms.

Explanation:

For a given amount of energy utilized to create the signal, a microwave transmission can transmit the most data.

In order to provide high speed wireless connections that can send and receive audio, video, and data information, microwave is a line-of-sight wireless communication technique.

Highly directional antennas are used for line-of-sight propagation channels in terrestrial microwave transmission employing frequencies in the 4- to 12-GHz range. Depending on their spacing, the antennas' diameters can range from 12 inches to several feet and are often parabolic.

A series of microwave radio antennas make up this microwave link. They are found atop towers at various microwave locations. A communication system called a microwave link uses radio signals as a bridge to convey data between two or more fixed locations. A microwave network is composed of several microwave links.

Mobile cell towers and mobile phones communicate with one another via radio waves and microwaves, respectively. Because they can penetrate the atmosphere, microwaves are used. This signal can be transmitted to a satellite and used for global communication (more than one satellite is required for this).

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V1f= -6.75 m/s (left),original elastic potential energy = 12.7575 J,The original energy is in the Spring,In bursting-apart process, The conservation of momentum is Holds.

(a) Mass of the first block, M

Mass of the second block, 3M

final speed of the second block, V2f =2.25 m/s

Before the cord burns, both masses are in rest oposition,

Hence, initial speed of then m is 0,

They are V1i, V2i  = 0 m/s

Hence, by conservation of momentum,

   MV1i + 3MV2i = MV1f + MV2f

    M(0) + 3M (0) = MV1f + 3M (2.25 m/s)

                       V1f= -6.75 m/s    (left)

(b) Kinetic energy of the system,

  K.E = 1/2 MV1f2 + 1/2 3M V2f2

        =1/2 (0.420 kg)(6.75 m/s)2+1/2(1.26)(2.25 m/s)2    (given, M = 0.420 kg)

        =9.568125  J + 3.189375 j

         =12.7575 j

According to conservation of energy,

The loos of kinetic energy is used to gain in original elastic potential energy

Hence, original elastic potential energy = 12.7575 J

(c) Since the spring stores the potential energy,

The original energy is in the Spring

(d) In bursting-apart process, The conservation of momentum is Holds.

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The tennis ball's final velocity is calculated to just be -1.37ms 1, and the gap between its peak height and change in velocity is 0.10m.

The rolling ball can move in two different ways: translationally and rotatedally. While the ball rotates in the mass center frame, the ball's centre of mass experiences translational motion.

The dislocation that an item or particle experiences with regard to time is expressed vectorially as velocity. The metre per second (m/s) is the accepted measure of flow speed (also known as speed). Alternately, the magnitude of velocity can be expressed in centimetres per second (cm/s).

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Answer:

A molecule

Explanation:

The provided text contains information about the microscopic structures and crystal diagrams of dental plaster, dental stone, and die stone. It also mentions the gauging water ratios and procedures for manipulating and pouring compound impressions using these materials.

The text describes the microscopic structure of dental plaster, which consists of fibrous aggregates of fine cupotal with capitany pares. Dental stone is described as having prior crystals in the form of mods, while die stone is characterized by its cuboidal shape.

The crystal diagrams are mentioned for each material: Dental plaster, dental stone, and die stone.

The text then outlines three different demonstrations, each with a specific aim and gauging water ratio. The demonstrations involve studying the manipulation of dental plaster, dental stone, and die stone, as well as pouring compound impressions using these materials. The procedures for each demonstration are provided.

To learn more about the manipulation of dental plaster, dental stone, and die stone, as well as the pouring of compound impressions, further information can be explored in dental textbooks or dental laboratory manuals.

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Explanation:

Wavelength is the distance between two consecutive and equivalent points on a wave. Wavelength can be quantified by measuring the distance between two equivalent and consecutive points, such as the distance between two peaks or two troughs. The scientific symbol for wavelength is a Greek letter called lambda.

Karissa is able to determine the typical quantity of salt that dissolves, measure the water temperature repeatedly using the same technique, and ensure that the experiment adheres to a set methodology that enables repeatability.

It is crucial to adhere to good technique and create repeatable processes in order to boost trust in an experiment's findings. Karissa can make sure she is adhering to a specified set of instructions in her experiment on the solubility of salt in water at various temperatures in order to lower the possibility of bias or mistake. She can lessen the possibility of variability in her results owing to temperature variations by consistently utilising the same method to measure the water's temperature. And last, by figuring out the normal amount of salt that dissolves, she may compute an average and evaluate the accuracy of her findings. The faith in the experiment's correctness and dependability is boosted by all of these phases.

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Answer:

A. Net force is 15 N.

B. The answer is given below.

Explanation:

The following data were obtained from the question:

Force applied by you (Fᵧ) = 15 N

Force applied by your friend (Fբ) = 30 NForce applied by you (Fᵧ) = 15 N

Force applied by your friend (Fբ) = 30 N

Net force (Fₙ) =?

A. Determination of the net force.

Force applied by you (Fᵧ) = 15 N

Force applied by your friend (Fբ) = 30 N

Net force (Fₙ) =?

Fₙ = Fբ – Fᵧ

Fₙ = 30 – 15

Fₙ = 15 N

Thus, the net force acting on the box is 15 N.

B. From the question given above, we can conclude that the box will move towards you because the force applied by your friend is greater than yours.

The exercise tells us that the electric field is given by the following equation:

And it also gives us, A and Q. Thus, our electric field inside the capacitor is:

As we know, the electric force can be written as:

The charge of an electron is a constant, which is q=1.6*10^(-19) C.

Finally, our force can be written as:

Our final answer is 0.00001149 micro Newtons