Wwhat was the power output of the speaker, assuming uniform spherical spreading of the sound and neglecting absorption in the air?

Answer:

Below :)

Explanation:

It is the powerhouse of the cell and creates chemical energy.

Answer:

Artificial selection is the identification by humans of desirable traits in plants and animals, and the steps taken to enhance and perpetuate those traits in future generations.

Explanation:

Hope this helps bro

,Paige does 182.9 J of work on the crate as it slides 3.3 m down the ramp.

To determine the work done by Paige on the crate as it slides down the ramp, we need to calculate the component of Paige's force that is parallel to the direction of motion of the crate. This component will do work on the crate by exerting a force in the same direction as the crate's displacement.

We can first calculate the weight of the crate, which is given by

W = mg

where m is the mass of the crate and g is the acceleration due to gravity. We can assume that the crate is on a frictionless surface, so the force of friction is zero. Therefore, the weight of the crate is the only force acting on it parallel to the ramp. Using the angle of the ramp, we can calculate the component of the weight that is parallel to the ramp:

F_parallel = mg sin θ

where θ is the angle of the ramp, which is 20∘. We can also calculate th

m = W/g

where g is the acceleration due to gravity, which is 9.81 m/s^2.

Substituting the values, we get:

m = (F_parallel/sin θ)/g

m = (mg sin θ/sin θ)/g

m = g

Therefore, the mass of the crate is equal to g.

Next, we can calculate the force applied by Paige, which is given by:

F_applied = 69 N

Since Paige is pushing back on the crate, her force is in the opposite direction of the crate's motion, so we need to calculate the negative of F_parallel. Therefore, the net force acting on the crate is:

F_net = F_applied - F_parallel

F_net = 69 N - g sin θ

Finally, we can calculate the work done by Paige on the crate using the formula:

W = F_net d

where d is the distance traveled by the crate, which is 3.3 m. Substituting the values, we get:

W = (69 N - g sin θ) x 3.3 m

Using the value for g and θ, we get:

W = (69 N - 9.81\(m/s^2\)x sin 20∘) x 3.3 m

W = 182.9 J

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The correct answer is(b). There is a physical change from the solid state to a gas state where energy between the molecules increases.

During sublimation, carbon dioxide transitions directly from the solid state (dry ice) to the gas state without passing through the liquid phase. In this process, individual molecules of carbon dioxide gain energy from the surroundings, leading to an increase in their kinetic energy and molecular movement.

As a result, the carbon dioxide molecules separate from each other and form a gas. This phase change is considered a physical change rather than a chemical change since the chemical composition of carbon dioxide remains the same throughout the process.

Therefore, the sublimation of carbon dioxide results in a physical change where the molecules transition from the solid state to the gas state, gaining energy and increasing their molecular movement.

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Answer:

(you can use my exact words) The length and thickness would make it so that the electrons move differently than they would a shorter and thinner wire because with the wire being longer the electrons would have a longer trip and with the wire being thicker the electrons would be more spread out and move be able to move more freely

Answer:

the following image will make you understand

Explanation:

The time of flight is obtained as 25.9 seconds

The time of flight is the time taken to move the object that have been projected along the parabolic path. In this case, we have a cannonball that have been fired  from level ground with a velocity of 240.0 m/s at an angle of 32 degrees.

We know that from the question

T = 2usinθ/g

T = time of flight

u = initial velocity

θ = angle of projection

g = acceleration

T = 2 * 240.0 m/s * sin 32 degrees/9.8 m/s^2

T = 25.9 seconds

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Net force is the overall force acting on an object, which takes into account the magnitude and direction of all the individual forces acting on it.

Whenever there are multiple forces acting on an object, the net force determines the resulting motion of the object. If the net force is zero, the object will remain at rest or continue to move with a constant velocity.

If the net force is non-zero, the object will experience acceleration in the direction of the net force, as described by Newton's second law of motion. The net force can be calculated by vector addition of all the individual forces acting on the object.

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Answer: (a) When Sarah pulls on one end of the rope with a force of 100 N, and her friend Jane pulls on the other end with an equal force of 100 N, the rope experiences a tension force. The tension force acts along the length of the rope, pulling it in opposite directions from each end. As a result, the rope remains taut and does not move in any particular direction.

(b) Without the given picture, it's not possible to identify specific labels for P, W, N, and f. However, I can provide explanations of what these labels generally represent:

(c) The box will move when an external force overcomes the opposing forces acting on it, such as friction and the normal force. If the applied force (P) is greater than or equal to the sum of the frictional force and the normal force, the box will start to move. To move the box with less effort, one can reduce the frictional force. This can be achieved by using lubricants or reducing the roughness of the surfaces in contact, thereby minimizing the resistance to motion. Additionally, applying the force at an angle or using mechanical advantage, such as using a lever or pulley system, can also help in moving the box with less effort.

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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 The charge Q is uniformly distributed throughout the sphere. The correct answer is (B)

When a solid conducting sphere is given a positive charge Q, the charge will distribute itself evenly throughout the surface of the sphere due to the repulsion of like charges. This is known as the "Faraday's ice pail experiment".

According to the principle of electrostatics, the charge on a conductor always resides on its surface and distributes itself in a way that the electric field inside the conductor is zero. Since the charge on a conductor always resides on its surface, it follows that the charge Q in this case must be uniformly distributed throughout the surface of the sphere.

Option (A) is not true because the charge is not concentrated at the center of the sphere. If the charge was concentrated at the center of the sphere, the electric field would not be zero inside the conductor, which contradicts the principle of electrostatics.

Option (C) and (D) are not true because the density of the charge does not change radially outward from the center. If the density decreased or increased radially outward, the electric field inside the conductor would not be zero, which again contradicts the principle of electrostatics.

Option (E) is not true because the charge is distributed throughout the entire volume of the sphere, not just on its surface. A solid conductor has free charges that can move throughout its entire volume, so the charge will distribute itself throughout the entire volume of the sphere until the electric field inside the conductor is zero.

Therefore, the correct answer is (B) it is uniformly distributed throughout the sphere.

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Answer:

Explanation:'Distance' is the total length travelled by an object. The standard unit is the 'metre'.

A distance-time graph shows how far an object has travelled in a given time.

Distance is plotted on the Y-axis (left) and Time is plotted on the X-axis (bottom)

nts have an uncertainty of 0.1 ohms each, we can calculate the following:

(a) Calculate the resistance R when R1 and R2 are wired in parallel:

Using the formula 1/R = 1/R1 + 1/R2, we can substitute the given values:

1/R = 1/7 + 1/10

(b) Calculate the percent uncertainty in R1:

Percent uncertainty in R1 = (Uncertainty in R1 / R1) * 100

Percent uncertainty in R1 = (0.1 ohms / 7 ohms) * 100

(c) Calculate the percent uncertainty in R2:

Percent uncertainty in R2 = (Uncertainty in R2 / R2) * 100

Percent uncertainty in R2 = (0.1 ohms / 10 ohms) * 100

(d) Calculate the percent uncertainty in R:

To calculate the percent uncertainty in R, we need to consider the uncertainties in R1 and R2:

Percent uncertainty in R = (Percent uncertainty in R1 + Percent uncertainty in R2)

You can substitute the given values into the equations to calculate the desired values.

Note: The uncertainty in R is calculated by combining the uncertainties in R1 and R2. Since the formula for parallel resistance is an addition of terms, the percent uncertainties in R1 and R2 can simply be added.

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Answer:

Coal was one of man's earliest sources of heat and light. The Chinese were known to have used it more than 3,000 years ago. The first recorded discovery of coal in this country was by French explorers on the Illinois River in 1679, and the earliest recorded commercial mining occurred near Richmond, Virginia, in 1748

Explanation:

The distance of sun, alpha centauri A, Sirius B, Bernard's Star, Sirius A, and Proxima Centauri from the earth is 1.578 * \(10^{-5}\), 4.367, 8.611, 5.978, 8.611 and 4.264 light years.

The distance of the planet Earth from other celestial bodies are as mentioned below:

A light year is measure of distance. It is distance covered by a light particle in a period of one year. Light travels at the speed of 3 * \(10^{8}\) m / s. So one light year will be equal to a distance of 9.46 trillion kilometers.

Therefore, the distance from Earth to

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Answer:

a + b = c      where a and b and c are vector quantities

Since c is the result of adding vector b to vector a (to add two vectors the vectors are connected head to tail)

a^2 + b^2 - 2 ab cos θ = c^2 is an expression of such a relationship

Note that a^2 + b^2 = c^2 if a and b are at right angles to one another

Another way to express this is:

a x + b x = c x    where a and b are the x-components of a and b

a y + b y = c y      describes the y -components of a and b

The above two equations will provide the x and y components of vector c

Answer: b

Explanation: just did it

Explanation:

uasjwwbwjwbwia GJ wkwkjwnwnwjwjjwjwd7beba s

Answer:

Decrease the distance between the two objects

Increase the distance between the two objects  to decrease the gravitational force between two objects.

A force is an effect that can alter an object's motion according to physics. An object with mass can change its velocity, or accelerate, as a result of a force. An obvious way to describe force is as a push or a pull. A force is a vector quantity since it has both magnitude and direction.

The gravitational constant, denoted by the capital letter G, is an empirical physical constant involved in the calculation of gravitational effects in Sir Isaac Newton's law of universal gravitation and in Albert Einstein's theory of general relativity.

f = Gmm/r²

Increase the distance between the two objects  to decrease the gravitational force between two objects.

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Answer:

Typical golf caddie responsibilities include carrying clubs, cleaning balls,

calculating distances and scores, and even replacing the divots - pieces of

grass and dirt that have been cut loose by the swift, forceful strikes of golf

clubs.

The warmth from the water is flowing to the ice and melting it and The warmth from the burner is flowing to the cold water and increasing its temperature.

Convection, which is essentially the mass transfer of heat, is the process by which heat is moved from one place to another by the movement of fluids. The transport of heat into the atmosphere involves one of three processes: radiation, conduction, or convection.

Heat flow occurs when a hot object transmits its heat through a conductors to a cooler, similar to how high-energy objects impart their power to low-energy objects. How well a conductor transfers heat will impact how quickly and how much heat is transported.

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Answer:

The basic difference is wavelength (frequency)

ultraviolet < visible < infrared where the visible spectrum lies at

4000 - 7000 Angstroms =  400 - 700 millimicrons (10^-9 meters)

Tjhe shorter wavelengths (ultraviolet) carry more energy / photon

Answer:

Vesicular texture refers to volcanic rocks that contain holes called vesicles that were formed by gas bubbles in lava. This igneous rock is called scoria. The vesicles form from escaping gas bubbles in cooling lava.

Explanation:

this might help you i think so

The width of "grid boxes" or grid spacing for most current global climate models varies depending on the specific model and its resolution, but typically ranges from 50 to 300 kilometers (km) in each direction.

Some models may have even smaller grid spacing, down to a few kilometers, in order to capture regional-scale features and phenomena. However, it's worth noting that grid spacing is not the only factor that determines the accuracy of climate models - other factors such as the representation of physical processes and the quality and quantity of input data are also important.

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Answer:

0.43 m/s, forward

Explanation:

i just took the test

A 50 kg boy runs and jumps with a forward velocity of 1.5 m/s into a 125 kg stationary boat, then the final velocity of the boy boat system would be 0.43 meters per second in the forward direction, therefore the correct answer is option A.

It can be defined as the product of the mass and the speed of the particle, it represents the combined effect of mass and the speed of any particle, and the momentum of any particle is expressed in Kg m/s unit.

As given in the problem A 50 kg boy runs and jumps with a forward velocity of 1.5 m/s into a 125 kg stationary boat, then the final velocity of the boy boat system,

By using the conservation of the momentum for the boy boat system,

50 × 1.5 + 0 = 175 × v

v = 75/175

v = 0.43 meters / second

Thus, the final velocity of the boy boat system would be 0.43 meters / second in the forward direction.

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Answer:

1: 80

2: 0.013 (its 0.0125 rounded)

Explanation: