The epiphyseal, or growth, plates close at relatively younger ages in which of the following groups?

At 1500°C, uranium would be in a molten or liquid state. As it cools to 900°C, it will solidify

The temperature of a substance determines its state of matter. At high temperatures, substances tend to be in a liquid or gaseous state, and as the temperature decreases, they solidify.

In the case of uranium, at 1500°C, it would be in a molten or liquid state because this temperature is higher than its melting point of 1132°C.

However, as it cools to 900°C, it will become solid because 900°C is below its melting point.

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The initial volume of the liquid is 31.4 cm³. The volume coefficient of thermal expansion of the liquid is 0.002 per degree Celsius. A temperature increase of 109.5°C is needed for the liquid to rise to a height of 49cm.

The initial volume of the liquid can be found using the formula for the volume of a cylinder:

V = πr²h

where r is the radius (half the diameter), h is the height, and π is approximately 3.14. Plugging in the given values, we get:

V = π(0.5 cm)²(40 cm)

V = 31.4 cm³

The volume coefficient of thermal expansion (β) is defined as the fractional change in volume per degree Celsius change in temperature. It can be calculated using the formula:

β = ΔV/(VΔT)

where ΔV is the change in volume, V is the initial volume, and ΔT is the change in temperature. We can rearrange this formula to solve for ΔV:

ΔV = βVΔT

We know that ΔT = -10°C (a decrease of 10°C) and that the height decreased from 40cm to 37cm, or by 3cm. The change in volume can be found using the formula for the volume of a cylinder again, with the new height of 37cm:

ΔV = π(0.5 cm)²(40 cm - 37 cm)

ΔV = 0.59 cm³

Plugging in all the values, we get:

0.59 cm³ = β(31.4 cm³)(-10°C)

β = 0.002

To find the change in temperature needed for the liquid to rise to a height of 49cm, we can use the same formula as before, but solve for ΔT:

ΔT = ΔV/(βV)

We know that ΔV is the difference between the initial volume and the volume at the new height, which is:

ΔV = π(0.5 cm)²(49 cm - 40 cm)

ΔV = 6.86 cm³

Plugging in all the values, we get:

ΔT = 6.86 cm³/(0.002)(31.4 cm³)

ΔT = 109.5°C

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With a horizontal velocity of 3.04 m/s and a horizontal displacement of 1.68 m from the end of the diving board, the swimmer enters the water 1.70 metres below the diving board.

The rate at which something moves in a certain direction is referred to as its velocity. as quickly as a car travelling north on a highway or a rocket taking flight.

We can use the kinematic equations of motion to solve this issue.

Use the swimmer's horizontal travel distance as the displacement in the x-direction. Given that the swimmer enters the water 1.68 metres from the board's end, the following is the answer:

x=1.68 m and v0x=3.04 m/s

Δx = v0x * t

calculating t:

t = 1.68 m / 3.04 m/s because x / v0x.

t = 0.5526 s

Thus, the swimmer enters the water in 0.5526 seconds.

"y" equals "v0y*t" plus "(1/2)*a*t2"

replacing the values with:

Δy = 0 + (1/2) * (-9.81 m/s²) * (0.5526 s)²

Δy = -1.70 m

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Answer:

a protective and waxy or hard layer covering the epidermis of a plant, invertebrate, or shell.

Answer:

The cuticles for animals are a thin layer of clear dead skin around the nail bed on fingers and toes. As the nail grows, it naturally pushes and damages the underside of the skin around the base of the nails, called the eponychium. The space between the eponychium and the bottom of the nail is where the cuticle is located.  

The cuticle definition related to plants is a protective and waxy or hard layer covering the epidermis. The plant cuticle is an extracellular hydrophobic layer that covers the aerial epidermis.

Explanation:

The increase in temperature of the bullet in degrees C is 87.17

Define Specific Heat Capacity?

When a material's temperature rises by 1 K (or 1 °C), or when its mass increases by 1 kg, the specific heat capacity is defined as the amount of heat (J) absorbed per unit mass (kg).

This measurement is expressed as J/(kg K) or J/(kg °C).

The heat that is transferred to the bullet as a result of the conversion of kinetic energy to heat is what causes the bullet's temperature to rise.

                                          Q = cm T,

where Q is the energy transferred, c is the substance's specific heat, m is its mass, and T is the temperature change, describes this relationship.

Given,

mass = 2.7 x 10^-3 kg

speed = 202 m/s

C = 234 J/kg/C.

The kinetic energy of the travelling bullet is,

1/2 m(v^2) = 1/2 x 2.7 x 10^-3 x 202 x 202

                 = 55.08 J

Energy that raises the temperature = 55.08 J

This is equal to mCΔT

Equalising the 2 energies,

55.08 = mCΔT

ΔT = 55.08 / mC

      = 55.08 / 2.7 x 10^-3 x 234

      = 87.17

Hence, the increase in temperature of the bullet in degrees C is 87.17

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Answer:

360000

Explanation:

Answer:

360000 milliseconds

Explanation:

I have this remembered dont worry homie i got chu

Answer:

1) The amplitude of the motion is approximately 0.274 meters.

2) The total energy of the object at any point of its motion is 16.892 joules.

Explanation:

1) An object under simple harmonic motion is conservative, since there is no dissipative forces acting during motion (i.e. friction, air viscosity). The amplitude of the motion can be found easily by Principle of Energy Conservation by the fact that maximum elastic potential energy (\(U_{e}\)), in joules, is equal to maximum translational kinetic energy (\(K\)), in joules:

\(U_{e} = K\)

\(\frac{1}{2}\cdot k \cdot A^{2} = \frac{1}{2}\cdot m \cdot v^{2}\) (1)

Where:

\(k\) - Spring constant, in newtons per meter.

\(A\) - Amplitude, in meters.

\(m\) - Object mass, in kilograms.

\(v\) - Speed of the object at equilibrium, in meters per second.

If we know that \(k = 450\,\frac{N}{m}\), \(m = 0.25\,kg\) and \(v = 0.3\,\frac{m}{s}\), then the amplitude of the motion is:

\(\frac{1}{2}\cdot k \cdot A^{2} = \frac{1}{2}\cdot m \cdot v^{2}\)

\(k\cdot A^{2} = m\cdot v^{2}\)

\(A = v\cdot \sqrt{\frac{m}{k} }\)

\(A = \left(0.3\,\frac{m}{s} \right)\cdot \sqrt{\frac{0.25\,kg}{0.3\,\frac{m}{s} } }\)

\(A \approx 0.274\,m\)

The amplitude of the motion is approximately 0.274 meters.

2) The total energy of the object (\(E\)), in joules, is found either by maximum elastic potential energy or by maximum translational kinetic energy, that is: (\(k = 450\,\frac{N}{m}\), \(A \approx 0.274\,m\))

\(E = U_{e}\)

\(E = \frac{1}{2}\cdot k\cdot A^{2}\)

\(E = \frac{1}{2}\cdot \left(450\,\frac{N}{m} \right) \cdot (0.274\,m)^{2}\)

\(E = 16.892\,J\)

The total energy of the object at any point of its motion is 16.892 joules.

The speed of the block m1 on the frictionless table is 1.34 m/s.

The given parameters;

The net torque on both blocks is calculated as;

\(\tau _{net} = I \alpha\)

\(T_2R- T_1 R_1 = I \alpha \\\\\)

where;

\(T_1 = m_1 g + m_1 a\\\\T_2 = m_2 g - m_2 a\)

The acceleration of both blocks is calculated as follows;

\(R(T_ 2- T_1) = MR^2 \times (\frac{a}{R} )\\\\R(T_2 -T_1) = MRa\\\\T_2 - T_1 = Ma\\\\(m_2g - m_2 a) - (m_1 g + m_1 a) = Ma\\\\m_2 g - m_1 g - m_2 a - m_1 a = Ma\\\\g(m_2 - m_1) = Ma + m_2a+ m_1a\\\\g(m_2 - m_1) = a(M+ m_2 + m_1)\\\\where;\\\\M \ is \ mass \ of \ string = 0 \\\\g(m_2 - m_1) = a (0+ m_2 + m_1)\\\\g(m_2 - m_1) = a(m_1 + m_2)\\\\a = \frac{g(m_2 - m_1)}{m_1 + m_2} \\\\a = 1.88 \ m/s^2\)

The speed of the block m1 is calculated as follows;

\(a = \frac{v^2}{r} \\\\v^2 = ar\\\\v = \sqrt{a r} \\\\v = \sqrt{1.88 \times 0.95} \\\\v = 1.34 \ m/s\)

Thus, the speed of the block m1 on the frictionless table is 1.34 m/s.

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This question involves the concepts of the thin lens formula and focal length.

The image "56.25 cm" from the lens.

The focal length of the lens is the half of the radius of curvature.

\(f=\frac{R}{2}\)

where,

Therefore,

\(f=\frac{50\ cm}{2}\\\\f = 25\ cm\)

Now, according to the thin lens formula:

\(\frac{1}{f}=\frac{1}{p}+\frac{1}{q}\\\\\)

where,

Therefore.

\(\frac{1}{25\ cm}= \frac{1}{45\ cm}+\frac{1}{q}\\\\\frac{1}{q}= \frac{1}{25\ cm}-\frac{1}{45\ cm}\\\\\)

q = 56.25 cm

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The ball's velocity at half of the maximum height relative to the equilibrium point is approximately 1.727 m/s.

To solve this problem, we make useof the law of conservation of energy. The initial potential energy of the system (when the ball is at its highest point before being released) is equal to the final potential energy (when the ball reaches half of its maximum height above the equilibrium point) plus the final kinetic energy.

Initial potential energy = mgh = 0.15 kg x 9.81 m/s² x 0.18 m = 0.26523 J

At half of the maximum height, the ball has traveled a distance of 0.09 meters above the equilibrium point.

Final potential energy = mgh = 0.15 kg x 9.81 m/s² x 0.09 m = 0.132615 J

To find the final kinetic energy, we can use the fact that the spring potential energy at half of the maximum height is equal to the initial potential energy minus the final potential energy:

Spring potential energy = (1/2)kx² = (1/2)(690 N/m)(0.18 m - 0.09 m)² = 0.008415 J

Final kinetic energy = Initial potential energy - Final potential energy - Spring potential energy

Final kinetic energy = 0.26523 J - 0.132615 J - 0.008415 J = 0.1242 J

Finally, we can use the equation for kinetic energy to find the velocity of the ball at half of the maximum height:

Final kinetic energy = (1/2)mv²

v = \(\sqrt{(2 x Final kinetic energy / m) }\)= \(\sqrt{(2 x 0.1242 J / 0.15 kg)}\) = 1.727 m/s

Therefore, the ball's velocity at half of the maximum height relative to the equilibrium point is approximately 1.727 m/s.

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The coefficient of volume expansion of the liquid, βliquid is 2.24 * 10⁻⁴ (C°)⁻¹.

The coefficient of volume expansion of the liquid is determined as follows:

Let the initial volume of the object be V₀

The change in the volume of the object will be ΔV

The expression for the change in the volume of the object when the temperature of the object changes by ΔT is:

ΔV = βV₀ΔT

where;

β is the coefficient of volume expansion

The data provided is as follows;

The initial volume of liquid and aluminum can, V₀ = 7.0 * 10⁻⁴ m³

The coefficient of volume expansion for aluminum = 69 x 10⁻⁶ (C°)⁻¹

The volume of liquid that spilled out, ΔV = 7.8 * 10⁻⁶ m³

Change in temperature, ΔT = (78 - 6)°C

ΔT = 72 °C

The difference between the change in volume of the liquid and the can is equal to the amount of liquid that spilled out.

ΔV = (βV₀ΔT)liquid - (βV₀ΔT)can

βliquid = ΔV/V₀ΔT + βcan

βliquid = (7.8 * 10⁻⁶ m³) / (7.0 * 10⁻⁴ m³ * 72 °C) + 69 x 10⁻⁶ (C°)⁻¹

βliquid = 2.24 * 10⁻⁴ (C°)⁻¹

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The temperature would rise by 1.8 degrees Fahrenheit if it went from 20 to 21 degrees Celsius.

Since 1880, the Earth's temperature has increased by an average of 0.14° F (0.08° C) per decade, or nearly 2° F overall. Since 1981, the pace of warming has increased more than double, to 0.32° F (0.18° C) every decade.

To assist us remember that as we move up the scale, we go from colder to hotter, let's label our thermometer. In other terms, a higher number of Fahrenheit degrees is hotter than a lower number of Fahrenheit degrees.

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46)

Since air resistance is ignored, both cannonballs will fall with the same acceleration due to gravity, which is approximately 9.8 m/s^2. The horizontal velocity of cannonball A does not affect its vertical motion, so it will fall at the same rate as cannonball B.

The time it takes for an object to fall to the ground from a certain height is given by the formula t = sqrt(2h/g), where t is the time, h is the initial height, and g is the acceleration due to gravity.

For cannonball B, which is dropped from a height of 20 meters, the time it takes to reach the ground is:

t = sqrt(2h/g) = sqrt(2*20/9.8) = 2.02 seconds

For cannonball A, which is fired horizontally with a velocity of 5 m/s, the time it takes to reach the ground is also 2.02 seconds, since the vertical motion is the same as cannonball B.

Therefore, both cannonballs will hit the ground at the same time.

47)

The recoil speed of the cannon can be calculated using the principle of conservation of momentum, which states that the total momentum of a system remains constant if no external forces act on it.

Before firing, the total momentum of the system is zero, since the cannon and cannonball A are at rest. After firing, the cannonball A has a momentum of 5 kg * 5 m/s = 25 kg m/s to the right, so the cannon must have an equal and opposite momentum to the left in order to conserve momentum.

The mass of the cannon is 500 kg, so its momentum after firing will be:

p = -25 kg m/s

The velocity of the cannon can be found using the equation:

p = mv

where p is the momentum, m is the mass, and v is the velocity. Solving for v, we get:

v = p/m = (-25 kg m/s) / (500 kg) = -0.05 m/s

Since the momentum of the cannon is negative, the recoil velocity is also negative, indicating that the cannon will move to the left after firing. The magnitude of the recoil velocity is 0.05 m/s, or approximately 0.18 km/h.

Answer: When a disrupted part of the ecosystem is left alone so that nature can help restore itself what people are counting on happening is secondary succession

Explanation:

Answer:

S = Vy t + 1/2 g t^2 = 1/2 g t^2    vertical speed with zero initial speed

t = (2 S / g)^1/2      with g = 32 ft/sec^2

t = (900 / 32)^1/2 = 5.30 sec    time to reach ground

V = a t = 32 ft/s^2 * 5.30 s = 170 ft/sec

170 ft/sec / (88 ft/sec / 60 mph) = 116 mph           since 88 ft/sec = 60 mph

Based on the information, it should be noted that the resistance R is 0.5 Ω.

When S1 and S2 are open, i leads e by 30°. In this case, the circuit consists of only the inductor (L) and the capacitor (C) in series. Therefore, the impedance of the circuit can be written as:

Z = jωL - 1/(jωC)

Since i leads e by 30°, we can express the phasor relationship as:

I = k * e^(j(ωt + θ))

Z = jωL - 1/(jωC) = j(120π)L - 1/(j(120π)C)

Re(Z) = 0

By equating the real parts, we get:

0 = 0 - 1/(120πC)

Let's assume that there is a resistance (R) in series with the inductor and capacitor. The impedance equation becomes:

Z = R + jωL - 1/(jωC)

Z = R + jωL

Im(Z) = ωL > 0

Substituting the angular frequency and rearranging the inequality, we have:

120πL > 0

L > 0

This condition implies that the inductance L must be greater than zero.

When S1 and S2 are closed, i has an amplitude of 0.5 A. In this case, the impedance is:

Z = R + jωL - 1/(jωC)

Since the amplitude of i is given as 0.5 A, we can express the phasor relationship as:

I = 0.5 * e^(j(ωt + θ))

By substituting this phasor relationship into the impedance equation, we can determine the value of R. The real part of the impedance must be equal to R:

Re(Z) = R

Since the amplitude of i is 0.5 A, the real part of the impedance must be equal to 0.5 A: 0.5 = R

Therefore, the resistance R is 0.5 Ω.

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The Big Bang theory is the most widely accepted explanation for the origins of the universe, but it does not necessarily imply that the universe emerged from nothing.

It is possible that new discoveries or insights may shed light on this fundamental question in the future. The universe may have arisen from a pre-existing state or through some other natural process that we do not yet understand.

Instead, the theory describes how the universe underwent a rapid expansion from a very dense and hot state. The conditions and laws of physics that applied during the earliest moments of the universe may not necessarily be the same as those we observe today, and there are many unknowns and uncertainties in our understanding of these early stages.

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Answer:

C) The force experienced by the ball equals the force experienced by the club.

Explanation:

When the golfer strikes the ball with his club, the club exerts a force on the ball. Due to Newton's Third Law Of Motion [Every Action has an equal and opposite reaction], the ball also exerts an equal force on the club. However,

As the mass of the club is usually greater than the mass of the ball, it accelerates slower; While the ball way faster, following the equation : F=ma

Calculate the horizontal component of the velocity. The horizontal component of the velocity is given by:

v_x = v * cos(theta)

where v is the original speed of the arrow and theta is the angle of projection.In this case, v = 2 m/s and theta is unknown. Solving for theta, we get:

theta = arccos(v_x / v)

theta = arccos(2 / 2) = 45 degrees

Calculate the vertical component of the velocity. The vertical component of the velocity is given by:

v_y = v * sin(theta)

In this case, v = 2 m/s and theta = 45 degrees. Solving for v_y, we get:

v_y = 2 * sin(45 degrees) = 1.414 m/s

Calculate the time of flight. The time of flight is given by:

t = 2 * v_y / g

In this case, v_y = 1.414 m/s and g = 10 m/s^2. Solving for t, we get:

t = 2 * 1.414 / 10 = 0.283 seconds

Calculate the height of the arrow. The height of the arrow is given by:

y = v_y * t - 0.5 * g * t^2

In this case, v_y = 1.414 m/s, t = 0.283 seconds, and g = 10 m/s^2. Solving for y, we get:

y = 1.414 * 0.283 - 0.5 * 10 * 0.283^2 = 0.303 meters

Therefore, the angle of projection is 45 degrees and the height of the arrow is 0.303 meters.

Answer:

24.8 :D

Explanation:

Answer:

Well velocity is the varaible with direction

Explanation:

The fan blades or propellers of an electric fan are examples of an inclined plane. The blades' frequently curved or angled shapes provide an inclined surface that effectively moves air.

Air is forced along the incline as the blades spin, creating airflow. An electric fan's motor assembly includes a wheel and an axle. The rotor, a revolving component, is connected to the motor's central shaft, also known as the axle.

Usually cylindrical in form, the rotor serves as the wheel. The motor spins around the fixed axle when electrical power is applied, which causes the fan blades to move and the air to circulate.

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In magnetic elements, each atom’s magnetic domains are aligned which creates magnetic force. In nonmagnetic elements, each atom’s domains are pointing in the different directions so, resulting element has nonmagnetic force.

Attraction or repulsion that arises between electrically charged particles because of their motion is called magnetic force and it is the basic force responsible for such effects as action of electric motors and also attraction of magnets for iron.

Magnetism is caused by motion of electric charges. Every substance is made up of tiny units called atoms and each atom has electrons, particles that carry electric charges. Spinning like tops, electrons circles the nucleus, or core, of an atom.

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If a particle's velocity is nonzero, then its acceleration can be zero, because acceleration is the rate of change of velocity. If the velocity is constant and does not change, the acceleration is zero.

The rate of change of an object's velocity with respect to time is defined as acceleration. Vector quantities are accelerations. The orientation of an object's acceleration is determined by the orientation of its net force.

Because velocity is both a speed and a direction, there are only two ways to accelerate: modify your speed or your direction—or both.

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Answer:

yea yes they can they lose their retina but they can dream