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

Answer:

Explanation:

1, i, π, e, and φ

dozen, gross, googol, and Avogadro's number etc, are pure numbers

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Answer:

See explanation

Explanation:

The caloric theory is an obsolete scientific theory that heat consists of a self-repellent fluid called caloric that flows from hotter bodies to colder bodies. Caloric was also thought of as a weightless gas that could pass in and out of pores in solids and liquids. The "caloric theory" was superseded by the mid-19th century in favor of the mechanical theory of heat, but nevertheless persisted in some scientific literature—particularly in more popular treatments—until the end of the 19th century.

Explanation:

Hola un peluche de pato para hacer ,flsdñalEñsfañslrlaldlrekslfkdldlfllddkflsl

,d,kdlsdlrkoslsflLelxñf

Answer:

the answer is "C" One gray sphere, four white spheres, one red sphere

Explanation:

To find the amplitude of the oscillations of the pendulum, take newton's second law for rotational systems into consideration.

T = I α

-mg sin∅ = mL² d²∅ / dt²

Rearranging the equation as

d²∅ / dt² + g / L sin∅ = 0

If the amplitude of angular displacement is small enough, so the small angle approximation holds, then the equation of motion reduces to the equation of simple harmonic motion

d²∅ / dt² + g / L ∅ = 0

The simple harmonic solution is

∅(t) = ∅' cos(ωt)

where ∅' = initial angular displacement

and ω = √g/L the natural frequency of the motion.

The time period for one oscillation is

T = 2π / ω = 2π√L/g

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The wavelength of a 1.8 eHz x-ray can be calculated using the formula λ = c/f, where λ is the wavelength, c is the speed of light and f is the frequency. The frequency of a 1.8 eHz x-ray is equivalent to 1.8 x 10^18 Hz.

Substituting this into the formula, we get λ = 3 x 10^8 m/s / (1.8 x 10^18 Hz). Simplifying, we get the wavelength to be approximately 0.1667 nanometers. X-rays have extremely short wavelengths, measured in nanometers, and are therefore highly energetic and can penetrate through dense materials. This makes them useful in medical imaging and industrial applications such as non-destructive testing.

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Answer:

Explanation:

Here are some simple do’s and don’ts for kids who refuse to do work: Don’t just punish. If a child or young adult is struggling with some social or emotional challenges at the moment, a punishment is only going to push them away further. Your punishment will appear as harsh, mean, and uncaring.The patient's failure to keep appointments. Patients make appointments, then cancel them at the last minute, or don't show up at all. From the provider's perspective, that means a window of no income in addition to the fact that the patient isn't getting the help he or she needs. A patient's rude or obnoxious behavior.

Answer: 0%

Explanation: hope this help

Answer:

tysm

Explanation:

Answer:

OMG THANK U SO MUCH I NEEDED THEMMMMM

third down, chris is correct

Answer:

I think that's because the force of gravity is greater than the buoyant force, and for the hot air balloons, they can increase/decrease the temperature of the air in the balloon in order for it to rise/fall for more control. For planes, they use aerodynamics as well as the help of a couple of engines to thrust the plane forward. I hope this helps.

Answer:

dumpster mass

Explanation:

you will need the mass of the dumpster to calculate using conservation of momentum

Answer:

3.07 kilometres per second

Answer:

8

Explanation:

octet rule: Atoms lose, gain, or share electrons in order to have a full valence shell of eight electrons. Hydrogen is an exception because it can hold a maximum of two electrons in its valence level.

Answer:

the answer is 8

Explanation:

got 100%

potassium ions into the cell and

outside

⇒ sodium ions out of the cell.

If the resultant force acting on the van is 1500 Newtons, then the magnitude of Force X would be 1500 Newtons as X is the only horizontal force opposing the motion of the van.

Newton's Second Law states that the resultant force acting on an object is proportional to the rate of change of momentum.

As given in the problem statement If the resultant force acting on the van is 1500 Newtons, then we have to find the magnitude of Force X,

The magnitude of the Force X = 1500 Newtons

Thus, the magnitude of the force X would be 1500 as it is the only force acting on the van.

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The acceleration on the 5kg block is 1.088m/s^2

Data;

To solve this question, we just need to use Newton's second law of motion which states that "the time rate of change of the momentum of a body is equal in both magnitude and direction to the force imposed on it."

\(F_n_e_t = M_t_o_t_a_l * a\\F = ma\\F_n_e_t = mg\\\)

But then the force on both sides will be

\(mg = ma\\5g - 4g= (4+5) a\\(5-4)g = 9a\\g = 9a\\a = \frac{g}{9} \\a = \frac{9.80}{9} \\a = 1.088 m/s^2\)

The acceleration on the 5kg block is 1.088m/s^2

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Answer:

Explanation:

The acceleration of an object given it's mass and the force acting on it can be found by using the formula

\(a = \frac{f}{m} \\ \)

f is the force

m is the mass

From the question we have

\(a = \frac{105}{15} \\ \)

We have the final answer as

Hope this helps you

Answer:

The answer is a. littoral

Answer:

A. Littoral

Explanation:

A.P.E.X

Answer:

Explanation:

Answer:

Cr(OH)3 + 3 HCLO4 → Cr(CLO4)3 + 3H2O

Stoichiometry balancing +

The change in kinetic energy of the car can be given as,

After running to tree the car will stop therefore, the final speed of car is 0 m/s.

Substitute the knwon values,

Thus, the magnitude of change in the kinetic energy of car is 195000 J.

The correct answer is D. Amount of time and area of physical contact between the substances.

Explanation:

Heat transfer refers to the flow of thermal energy or heat between two or more objects. This process involves multiple factors and implies heat from the hottest object goes to the coldest one until there is an equilibrium. To begin, heat transfer depends on the amount of thermal energy in the objects because objects must have a different amount of thermal energy for heat to flow.

Besides this, the amount of energy that flows depends on the time and the contact between the substances of objects. Indeed, objects need to be in contact or close to each other for heat to transfer, and the time needs to be enough for the process to occur. For example, if you place a pot over the fire just for a few seconds it is likely the heat transferred is minimal, which does not occur if you leave the pot more time. At the same time if the pot is in close contact with fire more heat will be transferred.-

Answer:

the answer is D on edginuity.

Explanation:

Answer: The dimensions of a physical quantity are the power to which the fundamental quantities are raised to represent that quantity.

So, the dimension of 'Power' is 1 in mass, 2 in length, and -3 in time.

Answer:

1. Answer 2

2. Raise it higher.

Explanation:

1. Let's take the pogo stick for this example. A jumping motion when on the stick puts pressure on the spring which stores the kinetic energy.

2. Gravitational potential energy is proportional to the height of an object from the ground, so it should be raised higher.

A cup of hot coffee will be hotter than iceberg due to higher temperature of the cup of coffee.

The kinetic energy of an object is the energy that it possesses due to its motion.

It is also defined as the work needed to accelerate a body of a given mass from rest to its stated velocity.

The kinetic-molecular theory of matter explains the states of matter, and is based on the idea that matter is composed of tiny particles that are always in motion.

As the temperature of a matter increases, its speed or motion increases due to increase in the rate of collision of the particles of the matter and consequently the kinetic energy of the matter will increase.

Thus, a cup of hot coffee will be hotter than iceberg due to higher temperature of the cup of coffee.

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A strontium ion has four shells in this ion, so the number of electrons it have in is  36 electrons 29.

The chemical element strontium is a soft, silver-white, yellowish metallic element that is an alkaline earth metal and has a strong reactivity to chemicals. The most prevalent type of strontium found in dietary supplements is strontium chloride. Several distinct forms of strontium are employed in medicine.

Subatomic particles known as electrons have an intrinsic charge of magnitude -1. The size of an electron's charge is comparable to that of a proton, but its symbol is the opposite. The amount of electrons and protons in electrically neutral atoms and molecules should therefore be equivalent.

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The characteristics of electrostatics we can find the results for the attraction of the charge by a metal plate are:

        a) The plate has no initial charge.

        b) The plate has an initial charge.

Electrostatics studies the forces between charged particles, finding that charges of the same sign repel and charges of the opposite sign attract.

Materials can be classified according to their charges mobility into two types:

a) Indicate that we bring a charge close to a metal plate and it is attracted.

   Because the plate is metallic, it has mobile charges.

The charge repels the charges of the same sign that are in the vicinity of it and there is a plate a excess of the opposite sign charges, therefore the plate attracts the charge, when removing the charge the plate remains neutral.

Therefore, for the plate to be attracted, it does not necessarily have to be charged.

b) Indicates that the charge is repelled to the metal plate.

This implies that there are excess charges on the plate of the same sign as the charge on the sphere.

When the sphere approaches, it repels charge of the same sign, therefore the charge plate decreases, but for there to be repulsion force the plate must be initially charged.

In conclusion, using the characteristics of electrostatics we can find the results for the attraction of the charge by a metal plate are:

     a) The plate has no initial charge.

     b) The plate has an initial charge.

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Answer:

First, write the velocities in component f…

Explanation:

As per as calculations

B

They store the radioactive waste in pools of water until it is no longer dangerous. It is then transferred to a dry cask. :))