Which best describes vibration

Answer:

Okay it dropped now what..........................................

Explanation:

Is the rock okay I’m concerned

Answer:

Pitch is the listener's perception of the frequency of sound, but it does affect the speed.

Explanation:

Depending on the frequency at which the sound waves that produce them vibrate, sounds have a higher or lower pitch.

A low frequency, such as 55 Hz, is heard as a low pitch and a high frequency, such as 880 hertz [Hz; cycles per second], as a high pitch.

In frequency, hertz units are used. The pitch of a sound wave increases with the speed of oscillation.

Pitch and sound frequency are connected. The frequency increases as the pitch rise. The length of the vibrating item affects the frequency and pitch of the vibration.

For instance, a shorter string vibrates more quickly than a longer string, producing a greater frequency and pitch.

Therefore, the pitch is related to in terms of sound The higher the pitch of the sound, the higher the frequency, and vice versa, hence they are directly correlated.

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See the attached picture:

Answer:

= 60.16 cm/s or 0.6 m/s

Explanation:

Using the formula for collision;

M1U1 + M2U2 = M1V1 + M2V2

Therefore;

(225 kg)•(98 cm/s) + (198 kg)•(28 m/s) = (225 kg)•v + (198 kg)•(71 cm/s)

22050 kg•cm/s + 5544 kg•cm/s = (225 kg)•v + 14058 kg•cm/s

13536 kg•cm/s = (225 kg)•v

v = 60.16 cm/s

Therefore; the post collision velocity of the 225 kg car is 60.16 cm/s

I believe the answer is B

Answer:

B

Explanation:

Because its just b trust me

Answer:

[tex]4.38\cdot 10^{13}[/tex] electrons

Explanation:

The net charge on the sphere is equal to:

[tex]Q=-7\cdot 10^{-6}C[/tex]

This charge is made up of N electrons. Each electron carries a charge of

[tex]q=-1.6\cdot 10^{-19}C[/tex]

So the total charge is just the number of electrons times the charge of each electron:

[tex]Q=Nq[/tex]

And solving the equation for N, we find the number of electrons:

[tex]N=\frac{Q}{q}=\frac{-7\cdot 10^{-6}C}{-1.6\cdot 10^{-19} C}=4.38\cdot 10^{13}[/tex]

can be used to determines the expression for magnetic field strength of a current element

The Biot-Savart law is important for calculating magnetic fields from current loops but can be complex and time-consuming. It requires the use of cross-products and integration along the current-carrying wire. When symmetry exists, Ampère's law might offer a simpler solution.

One advantage of the Biot-Savart law is its ability to calculate the magnetic field produced by any current loop configuration, offering versatility in physics problems. A disadvantage is that it can be complex and time-consuming, particularly when dealing with intricate geometries where symmetry is lacking. When approaching a problem, if there is symmetry, one may consider Ampère's law as an alternative for simplifying calculations especially when a clear path of integration is present.

To apply the Biot-Savart law, it is necessary to define the current element dI and unit vector r, calculate their cross-product, and integrate this across the length of the current-carrying wire. This allows determination of the magnetic field's magnitude and direction. In specific setups, such as calculating the magnetic field of an infinite wire, the desired precision dictates certain assumptions like treating finite segments as effectively infinite when they align closely with the wire's length.

Overall, the Biot-Savart law provides a powerful tool for understanding how current-carrying wires influence the magnetic fields in their vicinity, which is a foundational concept in electromagnetism.

Answer:

= 22.5 m/s

Explanation:

The acceleration of a moving body is calculated by the formula;

a = (v-u)/t

Where; a is the acceleration of the body

v is the final velocity of the body

u is the initial velocity of the body and

t is the time taken

In this case;

u = 15 m/s

a = 2.5 m/s²

t = 3 seconds

2.5 m/s² = ( v- 15 m/s)/3 seconds

2.5 × 3 = v - 15

7.5 = v - 15

v = 7.5 + 15

  = 22.5 m/s

Answer:

There is a net force towards the center of the circle that causes the yo-yo to seek the center.

Circular Motion Qualities:

-Constant speed

-Accelerating

-Velocity is changing constantly.

Centripetal acceleration perpendicular to the motion causes the object to change direction

a_c=v^2/r

Tangential acceleration in the direction of the motion causes and increase or decrease in speed.

Tension in the string towards the center provides the centripetal force in a a yo-yo swinging around a person's head.

Centripetal force is the force that keeps an object moving in a circular path. In the case of a yo-yo swung around a person's head, the centripetal force is provided by the tension in the string acting towards the center of the circle. This force allows the yo-yo to maintain its circular motion.

Answer:

1.33 m

Explanation:

Tom weighs 600 N and is 2 meters from the pivot.  So his moment is:

τ = Fr

τ = (600 N) (2 m)

τ = 1200 Nm

To balance the see-saw, Jeremy must create an equal and opposite moment.

τ = Fr

1200 Nm = (900 N) r

r = 1.33 m

So Jeremy must sit 1.33 m from the pivot on the other side.

Final answer:

To find the coefficient of kinetic friction, use the formula μk = a - sinθ / cosθ where a is acceleration and θ is the angle of the incline. By substituting the given values (a = 0.70 m/s², θ = 25°), the coefficient of kinetic friction is approximately 0.285.

Explanation:

The coefficient of kinetic friction can be calculated using the formula:

μk = a - sinθ / cosθ, where a = acceleration and θ = angle of incline.

Plugging in the values given (a = 0.70 m/s², θ = 25°), we get μk ≈ 0.285.

Answer:

2nd statement would be the right answer

Answer: Time and space depend on reference frames, but the speed of light does not.

Explanation: According to Einstein Space and Time are directly related as the way we sense them, in his words space and time is like a fabric in which we cannot affect one without affecting the other as we interact with it, time can be stretched and squeezed depending on your inertial frame of reference (constant speed and mass). However light can travel thru the fabric of space and time and it does not get affected by any reference keeping always the same speed.

Answer:

Every electric circuit, regardless of where it is or how large or small it is, has four basic parts: an energy source (AC or DC), a conductor (wire), an electrical load (device), and at least one controller (switch).

Explanation:

Cell (battery)

Wires

Bulb or motor

Answer:

Friction

Explanation:

Friction is a force that opposes the movement of an object's relative motion. Friction always goes against the attempted movement of the object  when they are in contact. In other words, it is a force that prevents objects from sliding past each other.

The answer is friction.

I took the test and got it right.

Answer:

-4.0 m/s^2

Explanation:

Acceleration is defined as the rate of change in velocity:

[tex]a=\frac{v-u}{t}[/tex]

where

v is the final velocity

u is the final velocity

t is the time elapsed

For the object in this problem,

u = 65 m/s

v = 25 m/s

t = 10 s

So the acceleration is

[tex]a=\frac{25 m/s-65 m/s}{10 s}=-4.0 m/s^2[/tex]

The negative sign tells that the acceleration is opposite (=west) to the velocity (which is towards east).

Answer:

A

Explanation:

I’m gay

Answer:

[H3O+] = 0.00520 M

Explanation:

The dissociation of acetic acid in water is given by the equation;

CH3COOH + H2O<-------> H3O+ + CH3COO-  

ka =  [H+][C2H3O2-]/[HC2H3O2]

Ka = 1.8 x 10^-5

      = x^2 / 0.150-x  

x = [H3O+]= 0.00520 M  

it causes light to slow and refract very little

Answer:

it causes light to slow and refract very little

Explanation:

its on my test

Answer:The property that describes the amount of energy that flows past a given area per unit of time is called energy flux, denoted by S1. It can be calculated by dividing the energy by the area A and the time interval Δ t. The formula for energy flux is S = Energy passing area A in time Δ t A Δ t = u c = ϵ 0 c E 2 = 1 μ 0 E B1. In electromagnetism, current density is the amount of charge per unit time that flows through a unit area of a chosen cross section2.

Explanation:

Mechanical Advantage = (output force) / (input force)

Mechanical Advantage = (1300 N) / (50 N)

Mechanical Advantage = 26

The mechanical advantage of pulley is that with less applied force we can get large amount of work.

To find the answer, we need to know about the pulley system.

A pulley system is a wheel on an axle or shaft which is designed to support the movement and change the direction of a taut cable or belt, or transfer the power between the shaft and cable or belt.

In a pulley system, we get a huge amount of force from a less amount of applied force.

Thus, we can conclude that the mechanical advantage of pulley is that with less applied force we can get large amount of work.

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Answer: Multiply Both Volume And Density

Explanation: Multiply the volume and density together. Multiply your two numbers together, and you'll know the mass of your object.Keep track of the units as you do this, and you'll see that you end up with units of mass (kilograms or grams).

For this case we have by definition, Newton's second law of motion states that the force is directly proportional to the mass and to the acceleration of a body. That is to say:

[tex]F = m * a[/tex]

Where:

F: It's the strength

m: It's the mass

a: It's the acceleration

ANswer:

[tex]F = m * a[/tex]

Answer:

The answer is C.

Explanation:

I guessed and it was right

Answer:

Work done by the gravity, W = 102 J

Explanation:

It is given that,

Mass of the backpack, m = 8 kg

It is dropped from the height of, h = 1.3 m

We have to find the work done by the gravity as the back pack fall. Work done by the gravity is given by the product of force and distance covered by an object. Mathematically, it is given by :

W = F × d

∵ F = m g

⇒ W = mg h

[tex]W=8\ kg\times 9.8\ m/s^2\times 1.3\ m[/tex]

W = 101.92 Joules

or

W = 102 Joules

So, the work done by the gravity is 102 J. Hence, this is the required solution.

Answer:

73/35 Br

Explanation:

The symbol for a bromine isotope with 35 protons and 38 neutrons corresponds to the acronym used to represent bromine, with the atonic number on the left side of this circle in the upper corner and the mass number on the left side of this acronym in the lower corner.

The number is the number of protons, in this case the atomic number is 35. The number of the mass is the sum between the number of protons and the number of neutrons, which in this case is 35 + 38 = 73. The acronym that corresponds to bromine is "Br".

With that, we can conclude that the correct symbol would be 73/35 Br

Answer:

The angle of reflection is the angle the reflected rays make with a perpendicular line to the reflecting surface.  

Explanation:

Reflection It is the change of direction suffered by a luminous ray when hitting the surface of an object. The angle of reflection is that which is formed by the reflected ray and the normal vector to the study surface

Answer:

Reflected rays make with a perpendicular line

Answer:

When the temperature and pressure of a rock undergoing metamorphism changes. the composition of water allows materials to move more easily, the presence of fluids makes metamorphism more easy.he fluid changes also.

Explanation:

Answer:

It can have elevated concentrations of dissolved substances

Explanation:

Cause I happened to know

The nucleus has most of the atomic mass in an atom. The nucleus is made up of protons and neutrons.

The nucleus of an atom is located at its center and contains most of its mass. The correct answer is C.

It is composed of protons and neutrons, which are collectively known as nucleons. Protons have a positive charge, while neutrons have no charge. Electrons, on the other hand, are negatively charged particles that orbit the nucleus in energy levels or shells.

Although electrons are much lighter than protons and neutrons, they occupy a larger volume around the nucleus due to their lower mass. The mass of an electron is approximately 1/1836th the mass of a proton or neutron.

Therefore, when considering the total mass of an atom, the mass of the electrons is relatively insignificant compared to the mass of the nucleus, which is primarily composed of protons and neutrons. The correct answer is C.

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(a) [tex]-1.46\cdot 10^{-4} m/s^2[/tex]

The average acceleration of the ship is given by

[tex]a=\frac{v-u}{t}[/tex]

where

v is the final velocity

u is the initial velocity

t is the time elapsed

Here we have:

[tex]u=34 km/h =9.44 m/s[/tex] is the initial velocity

v = 0 is the final velocity

[tex]t=18 min =64800 s[/tex] is the time elapsed

Substituting, we find

[tex]a=\frac{0-9.44 m/s}{64800 s}=-1.46\cdot 10^{-4} m/s^2[/tex]

(b) 4.72 m/s

Assuming the acceleration is uniform, the average velocity of the ship is given by:

[tex]v_{avg} = \frac{v+u}{2}[/tex]

where

v is the final velocity

u is the initial velocity

Here we have:

v = 0

u = 9.44 m/s

So the average velocity of the ship is

[tex]v_{avg} = \frac{0+9.44 m/s}{2}=4.72 m/s[/tex]

Answer:

= 10 g

Explanation:

Half life is the time taken by a radioactive substance to decay by half of the original mass or initial amount.

Therefore, to get the new mass after decay;

New mass = Original mass × (1/2)^n ; where n is the number of half lives.

n = 60 seconds/20 seconds

  = 3

Therefore;

New mass = 80 g × (1/2)^3

                   = 80 g × 1/8

                   = 10 g

The square root of LC has the dimension of time. Its reciprocal is frequency.

The dimension of under root LC is calculated by taking square root of the multiplication of the dimensions of L (Inductance) and C (Capacitance). Using the dimensions of L as [M][L][T]-2 [I]-2 and C as [M]-1 [L]-2 [T]4 [I]2, the dimension of under root LC is [M]-1/2 [L]-1 [T]2 [I].

The question asks for the dimension of under root LC where L is Inductance and C is Capacitance. Both of these are primary physical quantities where the dimension of L is [M][L][T]-2 [I]-2 and the dimension of C is [M]-1 [L]-2 [T]4 [I]2. To find the dimension for under root LC, we can square root the multiplication of the dimensions of L and C, which means that the dimension of under root LC is [M]-1/2 [L]-1 [T]2 [I].

Here, M stands for mass, L for length, T for Time, and I for Current.

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In phase for constructive interference and out of phase for destructive

Answer:

The sun rotates more slowly at its poles.

Answer:

The sun rotates more slowly at its poles.