Is the chemical equation Ag + 2NH3 ----> Ag(NH3)2 balanced?

The terminal velocity of the sphere is approximately 22.68 mph.

The terminal velocity of a sphere is the constant speed at which the gravitational force pulling the sphere down is balanced by the drag force pushing the sphere up. The drag force is proportional to the velocity of the sphere, and can be calculated using the following formula:

Fd = (1/2) * rho * Cd * A * v²

where Fd is the drag force, rho is the density of the fluid (air in this case), Cd is the drag coefficient (which depends on the shape of the object), A is the cross-sectional area of the object perpendicular to the direction of motion, and v is the velocity of the object.

The gravitational force pulling the sphere down is given by:

Fg = m * g

where m is the mass of the sphere and g is the acceleration due to gravity.

At terminal velocity, the drag force is equal in magnitude to the gravitational force, so:

Fd = Fg

Substituting the expressions for Fd and Fg and solving for v, we get:

v = √((2 * m * g) / (rho * Cd * A))

where A = pi * r² is the cross-sectional area of the sphere, and r is the radius of the sphere.

Plugging in the given values, we get:

v = sqrt((2 * 0.6 * 9.81) / (1.2 * 0.47 * pi * 0.3²)) ≈ 10.13 m/s

To convert this to mph, we multiply by 2.23694:

v ≈ 22.68 mph

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Answer:               6,857.14m/h        (6.86km/h or 1.90m/s)

Explanation:

The magnitude of the displacement vector refers to the length or amount of the displacement vector. Displacement is the change in position of an object. Displacement is a vector quantity, which means it has both magnitude and direction. In this question, a figure skater is gliding along a circular path of radius 3.93 m.

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Answer: hello question b is incomplete attached below is the missing question

a) attached below

b) V = 0.336 ft/s

Explanation:

Elongation ( Xo)  = 16/ 7 feet

mass attached to 4-foot spring = 16 pounds

medium has 9/2 times instanteous velocity

a) Find the equation of motion if the mass is initially released from the equilibrium position with a downward velocity of 2 ft/s

The motion is an underdamped motion because the value of β < Wo

Wo = 3.741 s^-1

attached below is a detailed solution of the question

The sled's speed can be calculated by considering the acceleration, frictional force, and time. After substituting the given values and performing the calculations, the final speed is determined to be 12.25 m/s.

To calculate the speed of the sled after 2.50 seconds, we can use the equations of motion and consider the forces acting on the sled.

Let's denote the initial speed of the sled as v0, the final speed as vf, the acceleration as a, the time as t, and the coefficient of friction as μ.

Initially, the rocket sled is accelerating, so we can use the equation:

vf = v0 + at

Since the sled is skidding along its rails after the rocket engine stops, the only horizontal force acting on the sled is the force of friction. The frictional force can be calculated using the equation:

frictional force = coefficient of friction * normal force

Since the sled is moving horizontally, the normal force is equal to the weight of the sled, which can be calculated as:

weight = mass * gravity

Now, we can determine the acceleration of the sled using Newton's second law:

frictional force = mass * acceleration

Combining the equations and substituting the values, we have:

vf = v0 + (frictional force / mass) * t

To find the frictional force, we need to calculate the weight of the sled and then multiply it by the coefficient of friction:

frictional force = (mass * gravity) * coefficient of friction

Substituting this back into the previous equation, we get:

vf = v0 + ((mass * gravity * coefficient of friction) / mass) * t

Simplifying further, we have:

vf = v0 + (gravity * coefficient of friction) * t

Now we can substitute the given values into the equation. Assuming the acceleration due to gravity is approximately 9.8 m/s², the coefficient of friction is 0.5, the initial speed is 0 m/s (since the sled starts from rest), and the time is 2.50 s, we can calculate the final speed:

vf = 0 + (9.8 * 0.5) * 2.50

vf = 12.25 m/s

Therefore, the sled is moving at a speed of 12.25 m/s after 2.50 seconds.

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Answer:

Claim: Heart Rate for Sarah and Matt (this would be the homeostasis AT REST and throughout the graph time)

Evidence: The Graph and the HR/S and its evidence towards the heart rate/beats every 15 seconds, due to the homeostasis being a specific time limit and due to the specific heart rate of Matt and Sarah ONLY.

Explanation: A/B Checkpoint throughout the homeostasis (this would be heart rate/trial throughout the time of the graph)

Conclusion: Matt was further away ONLY BECAUSE Sarah has a higher Heart Rate during the time on the graph, which can represent how long they did something to increase/decrease from and where the homeostasis would be located.

Answer:

Claim: Heart Rate for Sarah and Matt (this would be the homeostasis AT REST and throughout the graph time)

Evidence: The Graph and the HR/S and its evidence towards the heart rate/beats every 15 seconds, due to the homeostasis being a specific time limit and due to the specific heart rate of Matt and Sarah ONLY.

Explanation: A/B Checkpoint throughout the homeostasis (this would be heart rate/trial throughout the time of the graph)

Conclusion: Matt was further away ONLY BECAUSE Sarah has a higher Heart Rate during the time on the graph, which can represent how long they did something to increase/decrease from and where the homeostasis would be located.

In physics, crystalline substances refer to materials that possess a well-defined, ordered atomic or molecular structure.

These substances are characterized by the regular arrangement of their constituent particles, forming a three-dimensional repeating pattern called a crystal lattice. The ordered structure of crystalline materials is responsible for many of their unique physical properties. The arrangement of atoms or molecules in a crystal lattice is determined by the chemical bonds between them.

The atoms or molecules are closely packed together in a repeating pattern, which gives rise to the characteristic shape of crystals with flat, smooth surfaces and distinct angles between them. Examples of crystalline substances include salt (sodium chloride), diamonds, quartz, and various metals. Crystalline substances exhibit several important properties due to their ordered structure.

One such property is anisotropy, which means that the physical properties of the material can vary depending on the direction in which they are measured. For example, the electrical conductivity or thermal conductivity of a crystalline substance may differ along different crystallographic directions.

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Answer: 708 N

Explanation:

Given

At rest, Elevator reads 588 N

When it starts moving upward at \(2\ m/s^2\), apparent weight changes

i.e. weight can be given by

\(\Rightarrow W'=m(g+a)\\\Rightarrow W'=mg+mg\cdot \dfrac{a}{g}\\\\\Rightarrow W'=W\left(1+\dfrac{a}{g}\right)\\\\\Rightarrow W'=588\left(1+\dfrac{2}{9.8}\right)\\\\\Rightarrow W'=707.99\approx 708\ N\)

The apparent weight is 708 N

The density of the object is is 4000 kg/m³

Density is the ratio of mass to volume of a body.

To calculate the density of the obeject, we use the formula below

Formula:

Where:

From the question,

Given:

Susbtitute these values into equation 1

Hence, the density is 4000 kg/m³

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Time: s (second)

Mass: kg (kilogram)

Length: m (meter)

The SI units (International System of Units) are a standard system of measurement used in science, engineering, and many other fields. They provide a universal language for expressing and comparing measurements. The SI units are based on seven fundamental physical quantities, and each of these quantities is associated with a specific base unit, which is defined independently of any other unit.

Seven base units of the SI system are:

Length: meter (m)

Mass: kilogram (kg)

Time: second (s)

Electric current: ampere (A)

Temperature: kelvin (K)

Amount of substance: mole (mol)

Luminous intensity: candela (cd)

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Answer:

The charge in each ball will be 3 * 10^-12 C

Explanation:

(Assuming the correct charge of the second ball is 8 * 10^-12)

When the balls are brought in contact, all the charges are split evenly among then.

So first we need to find the total charge combined:

(-3 * 10^-12) + (8 * 10^-12) + (4 * 10^-12) = 9 * 10^-12 C

Then, when the balls are separated, each ball will have one third of the total charge, so in the end they will have the same charge:

(9 * 10^-12) / 3 = 3 * 10^-12 C

So the charge in each ball will be 3 * 10^-12 C

Explanation:

, the net force will be felt on particle approximately 15.39 N to the right.

Answer:

C

Explanation:

I think it C because I learnt about it in geography and my teacher approves. Maybe

Answer:

It's the number of protons in the nucleus of the atom

Answer:

c

Explanation:

A group of organs working together comprises an organ system, B.

Answer::

Q(input) = 500 cal/s

Q(heat loss) = 400 cal/s

Q(useful work) = (500 - 400) cal/sec = 100 cal/sec

E(efficiency) = 100 / 500 = 20%

The acceleration due to gravity with a mass of the ball of 0.055 kg and a length of wire is 0.95m with a linear density of 1.2×10⁻⁴kg/m is 7.69m/s².

Acceleration due to gravity is defined as the object getting accelerated due to gravitational force acting on the freely falling body. The unit of acceleration is m/s².

From the given,

mass of ball (m) = 0.055kg

length of the wire (l) = 0.95 m

linear density = 1.2×10⁻⁴kg/m

time (t) = 0.016 s

acceleration due to gravity (g) =?

The tension of the wire, v = √(F)/m/L

The force F= v²×L/m

To find speed (v) the ratio between Lenght and time gives speed.

v = L/t

  = 0.95 / 0.016

 = 59.37 m/s.

The speed v is 59.37 m/s.

F = v²×m×L

 = 59.37×59.37×1.2×10⁻⁴

 = 0.423 N

The force is F = 0.423 N.

Force , F = W

                = m×g

    F/m = g

  0.423 / 0.055 = g

g = 7.69 m/s².

Thus, the acceleration due to gravity is g = 7.69 m/s².

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Answer:

The characteristics that determine how easily two substances change temperature are:

The volume and density of the substances and the amount of time they are in contact do not directly affect how easily they change temperature.

Explanation:

The coefficient of static friction for the given inclined plane is 0.8

coefficient of static friction = μ = F/N

μ = 25 cos 37 / 25

μ cos 37

μ = 0.8

Hence the coefficient of static friction for the given inclined plane is 0.8.

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Given,

The speed of the turkey, s=2 m/s

The time duration, t=5 s

The speed is given by the ratio of the distance traveled to the time period in which that distance is covered.

Thus

Where d is the distance.

Thus, on substituting the known values in the above equation,

Thus the distance covered by the turkey is 10 m

Thus the correct answer is option 2.

Answer:

(a) The resistance of 25m of wire is 3 ohms

(b) the length of this wire that has resistance 22 ohms is 183.33 m

Explanation:

Given;

resistivity of the wire, ρ = 0.12 ohms per meter

(a) The resistance of 25m of wire is calculated as follows;

\(R = \rho L\\\\R = 0.12 \ \frac{ohms}{m} \times 25\ m\\\\R = 3 \ ohms\)

(b) the length of this wire that has resistance 22 ohms is calculated as;

\(L = \frac{R}{\rho} \\\\L = \frac{22 \ ohms }{0.12 \ ohms/m} = 183.33 \ m\)

Answer In the field of physics, tension is called the force that is exerted by the action of a cable, rope, chain or other similar solid object. ... Since tension is a magnitude of force, it is measured in newtons and is always measured in a direction parallel to the chord on which it is applied.

Explanation:

A parallel circuit is an electrical circuit with more than one current path and all circuit components are connected between the same two sets of electrically common points. The current supplied by the source in a parallel circuit is equal to the sum of all branch currents in the circuit.

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George burnt his fingertips so badly that he can't feel anything with them anymore, then the papillary layer part of his skin must have been damaged, therefore the correct answer is option A.

It can be defined as the form of the energy in which heat is transferred from one body to another body due to their molecular movements, thermal energy is also known as heat energy.

As given in the problem George burnt his fingertips so badly that he can't feel anything with them anymore.

Option A is the appropriate response since George must have injured the papillary layer of his skin if his fingertips were burned so badly that he can no longer feel anything with them.

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The net speed of the ball at the highest point of the ball's motion which is hit at 10 m / s at 30° above the horizontal is 8.7 m / s

Net speed at the highest point of a projectile motion = Horizontal velocity component + Vertical velocity component

The direction of velocity of the ball is resolved into its horizontal and vertical components. It forms an right angled triangle.

cos θ = Adjacent side / Hypotenuse

cos θ = Horizontal component / Velocity

cos 30° = Horizontal component / 10

Horizontal component = 10 * 0.87

Horizontal component = 8.7 m / s

The vertical component of velocity at the highest point of a projectile motion is zero. Because as the ball moves higher the velocity decreases and finally reaches zero.

Net speed = 8.7 + 0

Net speed = 8.7 m / s  

Therefore, the net speed of the ball at the highest point of the ball's motion is 8.7 m / s

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Answer:

4.41N or 4.5N (check explanation)

Explanation:

450g = 0.45kg

F = ma

Using 10m/s² = 10(0.45) = 4.5N

Using 9.8m/s² = 9.8(0.45) = 4.41N

Lithium nitride consists of two ions chemically bonded together. Lithium is an element that has a +1 charge, while nitrogen is an element that has a -3 charge. As a result, the lithium ion and the nitride ion have charges of +1 and -3, respectively. The chemical formula for lithium nitride is Li3N.

Lithium is a group 1 element, which means it has one valence electron. Nitrogen is a group 15 element, which means it has five valence electrons. Lithium and nitrogen chemically bond to form lithium nitride by sharing electrons from each element's valence shell. Since nitrogen has a higher electronegativity than lithium, it pulls the shared electrons closer to itself, resulting in a negative charge.

Nitride is a compound ion that is formed when a nitrogen atom gains three electrons. The electron configuration of nitrogen is 1s2 2s2 2p3, while the electron configuration of nitride is 1s2 2s2 2p6. Nitride, which has a -3 charge, is isoelectronic with neon and has a stable electron configuration. Lithium is a metal that belongs to the alkali metal family. Lithium has one electron in its outer shell, which it can donate to form a positive ion. As a result, lithium ions have a +1 charge.

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