Jason throws a ball horizontally off a 300 meter cliff at 15.0 m/s. How far will it travel before it hits the
ground? Use significant figures, and estimate g to be equal to 9.81 m/s2. Round the answer to the nearest
hundredth.
117.30 m
B
130.80 m
с
51.80 m
D
101.70 m

Ferromagnetic materials lose their ability to form permanent magnets if b. heated above their curie temperature.

Ferromagnetic materials are a type of material that exhibits magnetism in the absence of an external magnetic field. Cobalt, nickel, and iron are the most commonly used ferromagnetic materials, although alloys such as Alnico are also used. A permanent magnet is a magnet that produces a magnetic field that does not change. A permanent magnet can be made from a ferromagnetic material. The strength of a permanent magnet is proportional to the amount of ferromagnetic material used.

Ferromagnetic materials lose their ability to form permanent magnets if they are heated above their Curie temperature. The Curie temperature is the temperature at which the ferromagnetic material's magnetic properties begin to deteriorate, and it loses its magnetism as a result. The magnetism of a ferromagnetic material is caused by the alignment of its magnetic domains. When the ferromagnetic material is heated to its Curie temperature, the thermal energy causes the domains to lose their alignment, causing the material to lose its magnetism.

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Answer:

we have ,

mass(m)=785g

volume (v)= 15 cm^3

now , density(d)= m/ v

=785/15

=52.33g/cm^3... is anwer

The electrical power supplied to the lamp is 100W when the p.d. across it is 24V and the current is 4.2 A.

Electrical power is the rate at which electrical work is done.

The unit of electrical power is Watts.

The experiment will require a 24V Battery, a Lamp marked 24V, 100 W, a key, wires, a rheostat, a voltmeter and an ammeter.

The circuit is completed and the rheostat is adjusted to provide until the voltmeter reads 24V.

The ammeter reading is taken as well.

When the voltmeter reading is 24V, it can be seen that' the ammeter reading for current is approximately 4.2 A.

Calculating, the power of the lamp:

Power = 24 × 4.2 = 100 W

Therefore, the electrical power supplied to the lamp is 100W when the p.d. across it is 24V and the current is 4.2 A.

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The energy of the emitted photon is approximately 1.4 x 10⁻²⁰ joules.

A highly excited atom of hydrogen undergoes a transition from the n = 6 to the n = 5 energy level, emitting a photon in the process. The energy of this photon in joules can be calculated using the formula:

E = (13.6 eV) * (1/n1² - 1/n2²)

where E is the energy, n1 is the initial energy level (n = 6), and n2 is the final energy level (n = 5). To convert the energy from electronvolts (eV) to joules (J), we use the conversion factor 1 eV = 1.6 x 10⁻¹⁹ J.

E = (13.6 eV) * (1/5² - 1/6²) = 0.0875 eV

Now convert to joules:

E = 0.0875 eV * (1.6 x 10⁻¹⁹ J/eV) = 1.4 x 10⁻²⁰ J

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Answer:

Explanation:

Explanation

PE = mgh

The mass once stated, cannot be altered. You cannot decide that 1/2 down its fall, it becomes 25 kg. The mass is fixed once it has a value.

g for your intents is a constant.  

h is the only thing you can change.

Givens

m = 10 kg

g = 9.81 m/s^2

h = 30 m

Solution

PE = m*g*h                       Substitute the givens into the equation

PE = 10 * 9.81 * 30

PE = 2943 Joules

Note a Joule is made of Kg m^2/sec^2

Answer:

B

Explanation:

Answer: 15.68ms

Explanation:

From the question, we are informed that it takes a time of 3.20s for the ball to return to her hand.

Then, the time thst will be taken by the ball to reach maximum height will be 1.6s

Let the initial speed be represented by v.

Therefore,

Vf = v - gt

where,

g = 9.8

t = 1.6

Vf = v - gt

0 = v - (9.8 × 1.6)

0 = v - 15.68

v = 15.68ms

=v−gt

⟹0=v−9.8×1.6

⟹v=15.68ms

Answer: At the antinodes of a standing wave, the wave is shaking very rapidly, causing those parts of the pizza to get hot. At the nodes, the wave is not shaking much at all, causing those parts of the pizza to stay cold."

Explanation:

antinodes vibrate and are the opposite of nodes which are stationary.

Some parts of the pizza are hot while others are still cold. Because the antinodes of a standing wave shake very quickly, causing the hot spots on the pizza to appear.

The fact that there are locations along the medium that appear to be standing still is a feature of every standing wave pattern.

The term "node" refers to these sites, which are also known as "points of no displacement." Other sites along the medium are subjected to vibrations with substantial positive and negative displacements.

During each vibrational cycle of the standing wave, these are the locations that experience the most displacement. These points are termed "antinodes" because they are the polar opposites of nodes.

The antinodes of a standing wave shake very quickly, causing the hot spots on the pizza to appear. The wave isn't moving very much at the nodes, therefore those areas of the pizza stay cold."

Hence some parts of the pizza are hot while others are still cold.

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Answer:

A.falling time

Explanation:

Because dependent variable is one that changes with respect to the other fixes quantities and here its falling time that changes

The time period and amplitude of the given function are 4 and 3.5 respectively. Thus the correct option is C.

Wavelength is defined as the distance between two successive troughs or crests. The peak of the wave is the highest point, while the trough is the lowest point. The wavelength is also known as the distance between two locations in a wave that have the same oscillation phase.

The time taken by a complete vibrational cycle of the wave to pass a particle is known as the time period or period of the wave. The period of the given function will be 4.

The maximum distance moved by a point on a vibrating body from its mean position is known as amplitude.

Time period = 4

And the amplitude of the function will be

\(A = (5+2) / 2 \\\)

\(A = 3.5\)

Therefore, amplitude = 3.5 and period = 4.

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The complete question is -

What are the period and amplitude of the function?

period: 3, amplitude: 3.5

period: 3; amplitude: 7

period: 4; amplitude: 3.5

period: 4; amplitude: 7

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Answer:

parallel combination of cell

Answer:

From liquid to solid or to solid or liquid the transition has to cross the grey zone.

Explanation:

hope it helps<

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______________________________________

The requried,
(a) The charge Q would correspond to the number of vehicles on the road at a given time.
(b) The current I would correspond to the rate at which vehicles are flowing past a particular point on the road.

In the analogy between traffic flow and electrical current:

(a) The charge Q would correspond to the number of vehicles on the road at a given time. In the same way that electric charge is a fundamental property of matter, the number of vehicles on the road is a fundamental property of traffic flow.

(b) The current I would correspond to the rate at which vehicles are flowing past a particular point on the road. In the same way that electric current is the rate at which electric charge flows through a circuit, traffic flow current is the rate at which vehicles flow through a particular point on the road. This is usually measured in vehicles per unit of time, such as vehicles per hour or vehicles per minute.

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The answer is 9800 J/S

Answer:

9800 J/s

Explanation:

A hologram is produced, we have to state why must the system (including light source, object, beam splitter, etc) should be held motionless within a quarter of the light's wavelength.

When a hologram is produced, interference between light waves scattered from the object and a reference beam is recorded on a photographic plate or other recording medium. The interference pattern is created by the superposition of these two coherent waves, and it contains information about the amplitude and phase of the light that scattered from the object.

To ensure that the interference pattern is stable and accurate, it is important to keep the entire system (including the light source, object, beam splitter, and recording medium) motionless to within a small fraction of the wavelength of the light used. This is because any movement or vibration in the system can cause changes in the relative phase and amplitude of the interfering waves, which can result in a loss of coherence and a distorted or blurred holographic image.

In particular, motion or vibration can cause the interfering waves to shift in phase, which will cause the interference pattern to shift as well. This can result in a loss of resolution and detail in the holographic image, as well as a loss of contrast and brightness. Therefore, it is important to maintain a stable and vibration-free environment during the hologram recording process to ensure high-quality holograms.

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Answer:

5920 cm

Explanation:

1 hm = 100m

1 m = 100cm

1 hm = 100×100cm = 10000 cm

0.592 hm = 0.592×10000cm = 5920 cm

Good luck !

Answer:

The bubble gum experiment demonstrates the law of conservation of mass in that even though the bubble gum has lost mass, this loss in mass is not because some matter present in the gum has been destroyed, but it has changed  form and has been removed from the gum.

Explanation:

In this science experiment, students investigate whether or not chewing gum should be considered eating. During the process of chewing the gum, the gum loses mass. The experiment is used to demonstrate the law of conservation of mass which states that matter can neither be created nor destroyed but may change from one form to another.

The loss in mass of the gum is due to the fact that the sugar present in the gum has changed form and has been removed from the gum. During the process of chewing the gum, the sugar in solid form present in the gum is dissolved in the saliva found in the mouth. The dissolved sugar is then swallowed and passes into the digestive tract for digestion. This shows that even though the bubble gum has lost mass, this loss in mass is not because some matter present in the gum has been destroyed, but it has changed  form and has been removed from the gum, This demonstrates the law of conservation of mass.

Answer:

Continents move

Explanation:

The above equation immediately gives W × s = −W × a = −0.36J

At x c  we find K=K max = 0.090J.

When the spring is stretched some distance x from the equilibrium point and its mass has some velocity, v, with which it is travelling, its kinetic energy equals its elastic potential energy, i.e. \(\mathrm {mv^2 = \frac{1}{2}kx^2}\).

When the spring and block are squeezed, the initial condition is specified, and the final situation is determined when the block goes back through the equilibrium point. When a spring is squeezed, its potential energy is maximized, and its kinetic energy is maximised when the mass reaches equilibrium.

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Answer:

450N

Explanation:

Given parameters:

Mass of object  = 450kg

Initial velocity  = 15m/s

Final velocity  = 75m/s

Time  = 1min  = 60s

Unknown:

Force applied  = ?

Solution:

To solve this problem, from Newton's second law of motion, we know that;

  Force  = mass x acceleration

  Acceleration  = \(\frac{v - u }{t}\)

 v is the final velocity

 u is the initial velocity

 t is the time taken

Now;

    Force  = mass x  \(\frac{v - u }{t}\)

   Force  = 450 x \(\frac{75 - 15}{60}\)  = 450N

a) The flow rate will be Q = 84 cm³ per second.

b) The flow speed in the capillaries will be 0.028 cm /s.

The flow rate is defined as the volume of the fluid passing across the cross-section of the pipe in a unit of time.

To calculate the flow rate of blood in the aorta, we can use the equation:

Flow rate = Area x Velocity x Density

Where the area is the cross-sectional area of the aorta, the velocity is the flow speed of the blood in the aorta, and the density is the density of blood (p = 1.0 g/cm³).

Substituting the values we know, we get:

Flow rate = 2.0 cm²x 42 cm/s x 1.0 g/cm³

Flow rate = 84 g/s

Therefore, the flow rate of blood in the aorta is 84 grams per second.

b. According to the principle of continuity, the flow rate of blood must remain constant as it moves from the aorta to the capillaries. Therefore, we can use the equation:

Flow rate = Area x Velocity x Density

To calculate the flow speed in the capillaries, given the combined cross-sectional area of the capillaries.

We know that the flow rate in the capillaries must be the same as the flow rate in the aorta, which we calculated in part a:

Flow rate = 84 g/s

The combined cross-sectional area of the capillaries is given as 3.0 x 10³ cm². Substituting these values in the equation, we get:

84 g/s = 3.0 x 10³cm² x Velocity x 1.0 g/cm³

Solving for the velocity, we get:

Velocity = 84 g/s / (3.0 x 10³ cm² x 1.0 g/cm³)

Velocity = 0.028 cm/s

Therefore, the flow speed in the capillaries is 0.028 cm/s.

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Answer:A:

To analyze how a gizzard works.

Explanation:

If λ occurs as an eigenvalue of A with multiplicity r, then there are r linearly independent eigenvectors associated with λ, and the geometric multiplicity of λ is equal to r.

Let A be an n × n matrix. An eigenvalue of A is a scalar λ such that there is a nonzero vector x satisfying the equation Ax = λx. This equation can be rewritten as the linear system (A − λI)x = 0, where I is the identity matrix. Nontrivial solutions to this equation exist if and only if the matrix A − λI is singular, which means that its determinant is zero. Thus, the eigenvalues of A are the roots of the polynomial equation det(A − λI) = 0, which is called the characteristic equation of A. The algebraic multiplicity of an eigenvalue is the number of times it appears as a root of the characteristic equation. The geometric multiplicity of an eigenvalue is the dimension of the eigenspace associated with that eigenvalue. The eigenspace of an eigenvalue λ is the set of all eigenvectors of A associated with λ, along with the zero vector.

The rank of A is the dimension of its column space, which is the span of its column vectors. The rank of A is equal to the dimension of the row space of A, which is the span of its row vectors. The rank of A is also equal to the number of nonzero singular values of A. If the rank of A is r, then the dimension of the nullspace of A is n − r. If A has r linearly independent eigenvectors associated with a particular eigenvalue λ, then the geometric multiplicity of λ is r. If the algebraic multiplicity of λ is greater than its geometric multiplicity, then there are not enough eigenvectors to form a basis of the eigenspace associated with λ, which means that A is not diagonalizable. If the algebraic multiplicity of λ is equal to its geometric multiplicity, then A is diagonalizable. If λ occurs as an eigenvalue of A with multiplicity r, then there are r linearly independent eigenvectors associated with λ, and the geometric multiplicity of λ is equal to r.

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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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The outside diameter or side dimension of the vibrating element must be at least 19 mm but not greater than 38 mm is true. A vibration sensor is a system that is used to identify the condition of machinery and prevent it from being harmed. It keeps track of vibrations in the machinery and sends an alert if it exceeds a set threshold.

A sensor that detects vibrations in the environment or within a physical structure is known as a vibration sensor. Vibration sensors are commonly utilized in the maintenance of rotating equipment like pumps, motors, and other machinery to predict failure before it happens.

Based on the vibration being observed, these sensors may detect a range of defects, from unbalance and misalignment to bearing wear and looseness.

The outside diameter or side dimension of the vibrating element must be at least 19 mm but not greater than 38 mm. Hence, the given statement is true. This size range is important for the sensor to be able to pick up on the machinery's small vibrations and changes.

Anything smaller than 19 mm will not detect vibrations with the same precision, and anything larger than 38 mm will be more difficult to install in tight locations.

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Vertical transition refers to nonnormative and less predictable services; whereas, horizontal transition refers to normative and developmental services. This statement is incorrect.

Vertical and horizontal transition are terms that are commonly used in special education and refer to different types of transitions that students may experience as they move from one educational setting to another.

Vertical transitions typically refer to transitions that involve a change in educational level, such as when a student moves from elementary school to middle school, or from high school to college. These transitions may be non-normative, in the sense that they may not follow the typical developmental trajectory, but they are generally more predictable because they are part of an established educational system.

Horizontal transitions, on the other hand, typically refer to transitions within an educational level, such as when a student moves from one classroom to another or from one teacher to another. These transitions are generally more normative and are part of the expected developmental trajectory for students.

Therefore, it is the opposite of what the statement suggests: vertical transition is typically more normative and predictable, while horizontal transition is typically less normative and more unpredictable.

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Answer:

An echo is formed as a result of reflection of the original sound which returns to the listener. You might have experienced Echo in an EMPTY ROOM but no echo is produced after the room is occupied. To avoid echo from being produced the echo has to be absorbed.

Explanation: