The speed of sound in water is measured to be 1485 m/s. what is this in mph?

Answer: C. Wind

Explanation:

An erosion is a phenomena in which a physical agent takes away along with it soil and deposit it to some other place.

Sand dune is a kind of wind erosion of the loose soil called as sand. It is typically seen in desert regions. The high speed wind currents blow away huge amount of soil.

The electron configuration that represents the atom with the largest atomic radius among the given options is 1s22s22p1. This is due to the addition of an electron in a higher energy level, which increases the atomic radius.

The electron configuration that represents the atom with the largest atomic radius would be 1s22s22p1. The atomic radius typically increases as you move down a group in the periodic table because more energy levels (shells) are being added. In the given options, 1s22s22p1 represents an atom with the largest number of energy levels. It also suggests that the atom has one more electron than 1s22s2 and that electron goes into the next higher energy level, making the atomic radius larger.The electron configuration that represents the atom with the largest atomic radius is option b. 1s22s2.The atomic radius increases as you move down a group and as you move from right to left across a period on the periodic table. So, the electron configuration with the highest energy level and the least number of electrons in the valence shell represents the atom with the largest atomic radius.In option b, 1s22s2, the atom has electrons in both the 1s and the 2s orbitals, and the 2s orbital is in a higher energy level compared to option c (which has fewer electrons) and option d (which has more electrons).

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Water vapor in a condenser tube changes by losing heat energy and condensing from the gaseous to the liquid phase, while releasing latent heat of vaporization.

As water vapor passes down the condenser tube, there are two primary changes that occur due to the process of condensation. First, the water vapor loses heat energy to the surrounding cooler surfaces of the condenser tube. This loss of energy decreases the kinetic energy of the water vapor molecules, causing them to slow down and become less spread out. Second, as the molecules lose energy, they begin to collect together due to the intermolecular forces between them, resulting in the transition from the gaseous phase to the liquid phase. Throughout this process, the latent heat of vaporization is released into the environment, which can be calculated using the formula Q = mLy, wherein 'Q' is the energy involved in the phase change, 'm' is the mass of the substance, and 'Ly' is the latent heat of vaporization.

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To calculate the Gibbs free energy of the eutectic melt relative to unmixed liquid gold and liquid silicon, you need to use the equation for Gibbs free energy. For part (a), assume that the Gibbs free energy change is zero for the unmixed liquids, and for part (b), assume it is zero for the unmixed solids. Substitute the given values into the equation to find the answer.

In a eutectic system, gold and silicon are mutually insoluble in the solid state. The eutectic system has a eutectic temperature of 636 K and a eutectic composition of xsi=0.186.

To calculate the Gibbs free energy of the eutectic melt relative to (a) unmixed liquid gold (Au) and liquid silicon (Si), and (b) unmixed solid gold (Au) and solid silicon (Si), we need to use the equation for Gibbs free energy (ΔG = ΔH - TΔS).

For (a), we can assume that the Gibbs free energy change (ΔG) is equal to zero for the unmixed liquids. The equation becomes ΔG(melt) = ΔH(melt) - TΔS(melt). Since the eutectic composition is given as xsi=0.186, we can assume that 0.186 moles of gold and 0.814 moles of silicon are present in the eutectic melt.

The change in enthalpy (ΔH) can be calculated by taking the eutectic temperature (636 K) and multiplying it by the change in entropy of mixing (ΔS(mix)). The ΔS(mix) can be calculated using the equation: ΔS(mix) = xAu · R · ln(xAu) + xSi · R ·

ln(xSi), where xAu is the mole fraction of gold and xSi is the mole fraction of silicon. Substituting the values, we can calculate ΔH(melt) = 1717.28 J/mol and ΔS(mix) = -2.25 J/(mol·K). Finally, we can substitute all the values into the Gibbs free energy equation to find the answer.

For (b), we can assume that the Gibbs free energy change (ΔG) is equal to zero for the unmixed solids. The equation becomes ΔG(melt) = ΔH(melt) - TΔS(melt).

The change in enthalpy (ΔH) for the unmixed solids can be calculated using the heat of fusion (ΔH(fus)) and the mass of gold and silicon in the eutectic melt. The ΔS(mix) for the unmixed solids can be calculated using the equation:

ΔS(mix) = R · ln(1 - xsi) + R · ln(1 - xAu), where xsi is the eutectic composition and xAu is the mole fraction of gold. Substituting the values, we can calculate ΔH(melt) = 27.39 J/mol and ΔS(mix) = 6.72 J/(mol·K). Finally, we can substitute all the values into the Gibbs free energy equation to find the answer.

Answer:

The correct answer is B

Explanation:

The motion of a pendulum is a classic example of mechanical energy conservation. So you can assume, ignoring  air resistance, that total mechanical energy is:

[tex]E = K + U[/tex]

Where K is kinetic energy, U is potential energy and E is the resulting mechanical energy.

You know that:

[tex]U = mgh\\K = \frac{1}{2}mV^{2}[/tex]

From this, you can deduce that for potential energy to be transformed entirely to kinetic energy the height of the pendulum mass must be zero and traveling at its maximum velocity, wich is depicted as B in the attached picture.

Answer:

0 Mark

Explanation:

For all the measurements that we make we always need some reference to find the value of the reading

So all the scales have its reference marked as 0 mark

When we put one end of our measurement at that reference mark then the other end of the measurement will give the reading of our measurements.

so here the correct answer should be

0 MARK

The horizontal component of the projectile's acceleration is zero.

A projectile is an item on which gravity is the sole force operating. Projectiles come in a range of shapes and sizes.

A projectile is an item that is launched from its resting position. A projectile is an item that is hurled vertically upward.

A projectile's horizontal velocity is constant, which is downward. Each second, a projectile's vertical velocity varies by 9.8 meters per second.

A projectile's horizontal motion is independent of its vertical motion.

Hence the horizontal component of the projectile's acceleration is zero.

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If the speed of an object increases, its kinetic energy increases.

If the speed of an object increases, its kinetic energy increases. Kinetic energy is directly proportional to the square of the object's velocity. As the speed of an object increases, the kinetic energy increases at a faster rate. This relationship can be described by the equation:

Kinetic energy = (1/2) × mass × velocity²

Since the velocity is squared in the equation, any increase in velocity will have a greater impact on the kinetic energy.

Therefore, as the speed of an object increases, its kinetic energy also increases.

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Final answer:

To calculate the force a 40.0-kg gymnast must exert to decelerate at 7 times the acceleration due to gravity, we use Newton's second law (F = ma) and find that she must exert approximately 2746.8 N.

Explanation:

Calculating the Force Exerted by a Gymnast

When a 40.0-kg gymnast lands and decelerates, she must exert a force to counteract the force of deceleration. To calculate the force she must exert if her deceleration is 7.00 times the acceleration due to gravity, we use Newton's second law of motion, which can be expressed as F = ma, where F is the force, m is the mass of the object, and a is the acceleration. First, we note that the acceleration due to gravity (g) is approximately 9.81 m/s². The deceleration she experiences would thus be 7 times 9.81 m/s², or approximately 68.67 m/s².

To calculate the total force, we multiply the gymnast's mass by the deceleration:

Force exerted (F) = Mass (m) × Deceleration (a)

F = 40.0 kg × 68.67 m/s²

F = 2746.8 N

Therefore, the gymnast must exert a force of approximately 2746.8 N by pushing down on the mat to achieve this deceleration.

The initial height of the rock can be calculated using the principles of projectile motion. First, we find the time the rock was in the air by using the horizontal motion, and then apply this time to the vertical motion taking gravity into account.

Using the principles of projectile motion, the objective is to find the initial height from which the rock was thrown. The first step on this process is to determine the time the rock was in the air. We know that the range (horizontal distance) d is given by the equation d=v*t*cos(θ), where v is the initial speed, t is the time the rock is in the air, and θ is the launch angle. Rearranging for time gives us t=d/(v*cos(θ)).

The next step is to apply this time to the vertical motion. The vertical motion is affected by gravity, and the displacement h is given by the equation h=vi*t - 0.5*g*t², where vi is the initial vertical speed, which is given by v*sin(θ), and g is the acceleration due to gravity. As the rock is hitting the ground, h will be negative. Substituting all the known values will give us the initial height the rock was thrown from.

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The magnitude of Earth's velocity in its orbit around the sun is approximately 29,450 m/s.

Given that the radius of Earth's orbit around the sun is 1.5 x 10^11 m, we can calculate the magnitude of Earth's velocity using the formula for the circumference of a circle: v = 2 × Pi × r / T, where v is the velocity, r is the radius of the orbit, and T is the period of the orbit. Since one year is equivalent to 365 days, we have T = 365 days. Plugging in the values, we get:  v = 2 × 3.14159 × 1.5 × 10^11 m / (365 × 24 × 60 × 60 s)

Simplifying the expression gives us:v ≈ 29,450 m/s

Answer:

0.35 m/s^2 or 0.35 m/s squared

Explanation:

Answer:

she will use one 2 as a subscript

To find the magnitude of the resultant momentum after an inelastic collision with given x and y components, one applies the Pythagorean theorem. The resultant momentum is approximately 140.01 kilogram meters/second.

The question involves calculating the magnitude of the resultant momentum after two balls undergo an inelastic collision. The given momentum components are 98 kilogram meters/second in the y-direction and 100 kilogram meters/second in the x-direction. To find the resultant momentum, we use the Pythagorean theorem since momentum is a vector quantity.

Using the values given:
(resultant momentum) = (100^2 + 98^2)
(resultant momentum) = (10000 + 9604)
(resultant momentum) = (19604)

The magnitude of the resultant momentum is approximately 140.01 kilogram meters/second.

The magnitude of the force F depends on the other two forces acting on the ring. It should be such that the vector sum of all three forces equals zero, due to the object's static state, which suggests a condition of equilibrium.

In the question, you have a ring being pulled on by three forces and it remains stationary. This situation is described by the physics concept of equilibrium, where the sum of all forces acting on an object equals zero because the object isn't moving. The forces here are vectors, meaning they have both magnitude (how big they are) and direction (which way they're pulling). Each force acts in a specific direction, which we'll assume are different for each one.

Now, the size of the force F would depend on the other two forces. Without exact information on the magnitude and direction of the other two forces, we cannot precisely compute F. However, we can say that F will be such that the vector sum of the all forces (including F) will be zero. This happens because no movement implies no net force according to Newton's second law. This law states that an object at rest, like the one in your assignment, stays at rest unless acted upon by a non-zero net force.

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