the water level is a 1.0m long vertical glass tube varies. a tuning fork gives off a frequency of 686hz is held over the open end of the tube to set up a standing wave of sound in the portion of air above the water. a) what is the smallest amount of water needed to make a standing wave in the air portion of the tube from the tuning fork? b) what is the next height of

Answer:

Voltage will be 1/2 original

Explanation:

V = I R        if  I  is constant

V = k R       now multiply both sides by  1/2

1/2 V  = k 1/2 R     <===== you can see the voltage is halved too

Answer:

Explanation:

a )

hear energy required to melt 1 g of ice = 340 J ,

hear energy required to melt 80 g of ice = 340 x 80  J = 27220 J .

b ) energy gained by the melted ice ( water at O°C ) = m ct

where m is mass of water , s is specific heat and t is rise in temperature

= 80 x 4.2 x ( 8°C - 0°C)

= 2688 J .

c )

energy lost by lime juice = energy gained by ice and water

= 27220 J + 2688 J .

= 29908 J .

d )

Let specific heat required be S

Heat lost by lime juice = M S T

M is mass of lime juice , S is specific heat , T is decrease in temperature

= 320 g x S x ( 29 - 8 )°C

= 6720 S

For equilibrium

Heat lost = heat gained

6720 S = 29908 J

S = 4.45 J /g °C .

B. STATIC ELECTRICITY

IS THE CORRECT ANSWER.

JUST FOR MORE KNOWLEDGE ,,...

EVERY ATOM OF MATTER HAS ELECTRONS , AND THESE ELECTIONS HAVE NEGATIVE ELECTRIC CHARGE WHEN YOU RUB TWO OBJECTS TOGETHER, YOU CAN CAUSE THESE CHARGES TO MOVE FROM ONE OBJECT TO ANOTHER .THIS PULLING FORCE BETWEEN UNLIKE CHARGES IS CALLED STATIC ELECTRICITY .

The false statement is B) Homolytic bond cleavage yields neutral radicals in which each atom gains one electron.

In homolytic bond cleavage, each atom retains one electron from the shared pair of electrons, resulting in the formation of two neutral radicals, where each atom retains its original number of electrons.

No atoms gain or lose electrons in this process.

In a homolytic bond cleavage, a covalent bond is broken, and the shared pair of electrons is split equally between the two atoms involved in the bond.

This results in the formation of two neutral radicals, with each atom retaining one of the electrons from the shared pair.

A radical is a chemical species characterized by the presence of an electron that is unpaired, meaning it does not have a partner electron with which it forms a complete pair. When a covalent bond is homolytically cleaved, each atom involved in the bond gains one electron, resulting in the formation of two radicals.

These radicals are highly reactive due to the presence of the unpaired electron, which makes them prone to participate in further chemical reactions.

It's important to note that in homolytic bond cleavage, there is no transfer of electrons from one atom to another.

Instead, the bond is broken in a way that allows each atom to retain one of the electrons, leading to the formation of two neutral radicals.

Therefore, statement B, which suggests that each atom gains one electron, is false.

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The average power delivered to the circuit is 126.56 watts.

In a series RLC circuit, the impedance is given by Z = √(R^2 + (XL - XC)^2), where R is the resistance, XL is the inductive reactance, and XC is the capacitive reactance. We know that the impedance Z is 120 ω and the resistance R is 64 ω. So, we can use these values to find the values of XL and XC.
XL = Z^2 - R^2 = √(120^2 - 64^2) = 105.17 ω
XC = √(Z^2 - R^2) = √(120^2 - 64^2) = 105.17 ω
Now, we can use the formula for average power in a series RLC circuit, which is P = Vrms^2/R, where Vrms is the rms voltage. Here, Vrms is given as 90 volts.
P = Vrms^2/R = 90^2/64 = 126.56 watts.

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Answer:

The star's luminosity rises above its previous level. Because it is so cool, the surface will be red, and it will be much farther away from the center than it was during the earlier stages of star evolution. Despite its lower surface temperature, the red giant has a large surface area, which makes it very luminous.

Answer:

Newton first law

Explanation:

Newton's first law states that, if a body is at rest or moving at a constant speed in a straight line, it will remain at rest or keep moving in a straight line at constant speed unless it is acted upon by a force. The hockey puck moved because you hit it. ( tell me if I helped I hope you do good)

Answer:

A

Explanation:

The roller coaster is stationary so the kinetic energy would be zero, but it is at the top of ramp so the potential energy would be high as its gravitational  so it would have to be A

The grinding, groaning, and screeching sounds coming from the car's brakes let us know it was time to visit the mechanic. Option D

Punctuation is the use of symbols, such as periods, commas, semicolons, exclamation points, and question marks, to separate and organize words into meaningful sentences and clauses. The correct use of punctuation helps to clarify the meaning of a sentence and makes written communication easier to understand.

It's important to note that the rules of punctuation can be complex, and correct usage often depends on the context of the sentence.

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Answer:

What is your name?

Explanation:

no bro I don't know I am New of this app so I don't know

Answer:

When dealing with the force of gravity between two objects, there are only two things that are important – mass, and distance or (acceleration)

Explanation:

Aeronautical maps are usually meant to be used by pilots and air aviation professionals in other to navigate or traverse though the sky. With various elements such as vegetation, hills, valleys being depicted by color coded keys or legend. Hence, the absence of color on an aeronautical map make the representation of elements very difficult.

Visual map interpretation is usually aided by the use of legends. The legend hold the key to the elements which are represented on the map. Usually, a combination of colors and shapes makes up the legend and makes map interpretation easy.

Therefore, the absence of various color palletes for representation on a black and white aeronautical map will make it difficult to use.

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Answer:

Explanation:

Notice that nothing but the mass and height are given, and the mass is not really necessary. It will cancel when we do the problem.

So the potential energy at the top equals the Kinetic energy at the bottom.

PE_top = Ke_bottom

mgh = 1/2 m v^2          Divide by m

mgh/m =1/2 mv^2/m

gh = 1/2 v^2                  Multiply both sides by 2

2gh = v^2                    

Givens

g = 9.81

h = 1.5

Solution

2*9.81 * 1.5 = v^2

29.43 = v^2

v = sqrt(29.43)

v = 5.425

The work was done by the force on the block of 2 kg with an acceleration gravity of  9.81 \(m/s^2\) and at an angle of \(29^o\) 42.83 J.

When an object is moved over a distance by an external force, at least some of that force must be applied in the direction of the displacement. This is known as work in physics. Work may be estimated if the force acting along the path is constant by multiplying the length of the path by the component of the force acting along the path.

To express this formally, the work W is equal to the force f times the length d, or W = fd. The work is W = fd cos if the force is applied at an angle to the displacement.

Given:

The mass, m = 2 kg,

The acceleration, g = 9.81 \(m/s^2\),

θ = angle between block and surface kinetic friction = μ

Calculate the work done by the formula given below,

\(W_{fy}\) = F sinθ

\(W_{fy}\) =  (\(mgsin\)θ)/ (sinθ -  μ * cosθ)

Substitute the values

\(W_{fy}\)  = \((2*9.81 sin29^{o} )/sin29^o - 0.30cos29^o\)

\(W_{fy}\)  = 42.83 J

Therefore, the work done by the force on the block of 2 kg with an acceleration gravity of  9.81 \(m/s^2\), and at an angle of \(29^o\) is 42.83 J.

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Answer:

a person appears at a specified time and place and gives sworn testimony

Explanation:

Hope this helps

If a red sled slides across a sheet of ice and collides to a stationary green sled and continue sliding together, the velocity of the two sleds will be equal.

This type of collision is called as inelastic collision. In this type of collision, the two objects that undergo collision will move a single object after collision. So they cannot have different velocities.

According to law of conservation of momentum,

m1u1+ m2u2 = m1v1 + m2v2

In inelastic collision,

v1 = v2 = v

m1u1+ m2u2 = ( m1 + m2 ) v

Therefore, the velocity of the two sleds will be equal.

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Answer:

A

Explanation:

Answer:

That they conect the curcut and porvide electricity.

Explanation:

Answer:the wires must be conducted so that they allow for electrons to flow through the material

Explanation:

The baseball team (without the bus) has a momentum of 56,819 kg*m/s.

The momentum of an object is defined as the product of its mass and velocity. To calculate the momentum of the baseball team, we need to find the total mass of the team and the velocity of the team relative to the ground (which is the velocity of the bus since the team is riding on it).

The total mass of the team is given by:

mass of team = number of players x average mass per player

mass of team = 25 players x 84.4 kg/player = 2,110 kg

The velocity of the team relative to the ground is the same as the velocity of the bus, which is given as 26.9 m/s.

Therefore, the momentum of the baseball team is:

momentum = mass x velocity

momentum = 2,110 kg x 26.9 m/s

momentum = 56,819 kg*m/s.

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Let's explain why Common Emitter (CE) configuration is preferred over Common Collector (CC) for amplification purposes.

Common Emitter amplifier is an amplifier that offers high current gain, medium input resistance and high output resistance.

Common Collector is another type of amplifier where the input signal is applied to the base and the ouput signal is taken from the emitter.

The Common Emitter configuration is preferred over the Common Collector configuration because the Common Emitter offers a high power gain(high voltage and current gain), and has a lower resistance when compared to the Common Collector configuration.

ANSWER:

The common Emitter configuration has higher voltage and current gain when compared to the Common Collector configuration.

Infrared waves are ineffective for treating cancer because they do not transfer enough energy to destroy cancer cells.

One of the uses of a high frequency wave is in the treatment of cancer. These high frequency waves transfer enough energy to destroy the cancer cells.

E = hf

where;

Infrareds have low frequency, and hence low energy.

Thus, infrared waves are ineffective for treating cancer because they do not transfer enough energy to destroy cancer cells.

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The magnifying glass represents one of the simplest, most direct applications of a converging lens. As light enters the lens, it becomes focused to a specific focal point in front of the center of the lens. Once you bring the magnifying glass to the optimal distance, so the focal point reaches the object, the object will appear at maximum magnification. Move the glass farther from the object and it will become distorted; move the glass closer to the object and it will decrease in magnification.

Divergent lenses are used on flashlights to magnify the light produced by the bulb. The light falls on the concave side of the lens, and the rays diverge on the other side, thereby increasing the apparent radius of the light source and providing a wider beam.

Answer:

An unbalanced force can change an object's motion. An unbalanced force acting on a still object could make the object start moving. An unbalanced force acting on a moving object could make the object change direction, change speed, or stop moving

Explanation:

hope this helps :)

The stated purpose of the enzyme is to boost the speed of a certain process and decrease the overpotential for that reaction.

Energy is the capability to accomplish labor. The amount of labor an organism's stored energy is capable of performing after it is expended. energy is a scalar quantity. The term "joule" refers to the SI unit of energy. The quantity of energy required to do one photon of activity is one joule.

Scientists refer to energy as the ability to work. Modernity is feasible because people have learned how to transfer information from one media to another and then use it to complete tasks.

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Answer:

When a switch is closed, electrons move through a circuit from the negative side of a battery to the positive side

Explanation:

Note that current is marked to flow from positive to negative on circuit diagrams, but that's for historical reasons only. Benjamin Franklin did a fabulous job of understanding what was going on, but no one yet knew about protons & electrons, so he assumed current was flowing from positive to negative.

However, what really happens is electrons flow from negative (where they repel each other) to positive (where they are attracted).

As electrons flow through a circuit, they need 'something to do'. In many cases, that something is to light a bulb or heat an element, such as an element on a stove. So, the energy of an electron can be converted to heat or light.

I hope I'm understanding your question correctly

Given:

The applied force is F = 23 N

The mass of the object is m = 7 kg

The object moves with a constant velocity of v = 6.1 m/s

The acceleration due to gravity is g = 10 m/s^2

Required: The coefficient of friction between the object and the surface.

Explanation:

The object moves at a constant velocity, so the acceleration will be zero.

The equation of motion can be written as

So, the applied force will be equal to the frictional force.

The coefficient of friction can be calculated as

On substituting the values, the coefficient of friction will be

Thus, the coefficient of friction is 0.33

Final Answer: The coefficient of friction between the object and the surface is 0.33.

Answer:

The tension in the rope is 10 N

Explanation:

The Force Vector

Like all vectors, the force has a magnitude and direction. Vectors can be decomposed into two perpendicular components on both axes.

The tension in the rope (F) can be calculated by using vector decomposition as follows.

The figure included below shows a force F which horizontal component is known to have a value of Fx= 5 Nw. The angle formed by the force and its horizontal component is 60°.

We can use the trigonometric ratio called the cosine to find the magnitude of F as follows:

\(\displaystyle \cos 60^\circ = \frac{5}{F}\)

Solving for F:

\(\displaystyle F = \frac{5}{\cos 60^\circ}\)

\(\displaystyle F = \frac{5}{\frac{1}{2}}\)

Thus, F = 10 N

The tension in the rope is 10 N

Answer:

80 Joules.

Explanation:

Given that a 20 kg sled stars at the top of a hill which is 10 m above the bottom and slides a distance of 50 m, ending at the bottom of the hill with a speed of 8 m/s. During the slide, the work done by gravity is about ?

The parameters given are:

Mass M = 20 kg

Height h = 10 m

Velocity V = 8 m/s

The workdone by gravity will be equal to the total energy

At the bottom of the hill, the total energy will be equal to the maximum kinetic energy.

Maximum K.E = 1/2mv^2

K.E = 1/2 × 20 × 8

K.E = 80J

Therefore, the workdone by the gravity is equal to 80 Joules.

Answer:

 All particles of matter have mass, and they are composed of atoms.