a 195 g object is attached to a spring that has a force constant of 76.5 n/m. the object is pulled 6.75 cm to the right of equilibrium and released from rest to slide on a horizontal, frictionless table.

The acceleration of the baseball is 500 m/s².

A force is an influence that has the power to alter an object's motion. An object with mass can change its velocity, or accelerate, as a result of a force. An obvious way to describe force is as a push or a pull.

The mass of the baseball, m = 0.2 kg

The force acting on the baseball is 100 N.

By Newton's second law of motion,

F = ma

Substituting the values in the above equation,

100 N = 0.2 kg × a

a = 100 / 0.2

a = 500 m/s²

The total mass when the baseball and baseball bat are in contact is:

m = 0.2 + 0.94 = 1.14 kg

Then the acceleration will be:

F = ma

100 = 1.14 × a

a = 87.7 m/s²

The acceleration of the ball after the contact is 500 m/s².

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Answer:

Explanation:

Well mathematically it would look like this

E = k * I

k is the constant of proportionality.

As the voltage goes up, so does the current.

As the voltage goes down, so does the current.

In physics and engineering,, the formula is written somewhat differently.

E = I * R

The R is a device which limits the current. If R = 0 (like it is just a switch closing) then the first thing you will notice is that the lights go out and you better know where the circuit breakers are and have a flashlight to see which one you shorted out.

So R has a value > 0 in practice.

Answer:

Strong base

Explanation:

A strong base usually has the pH of between 12 to 14

If the pH of a solution is 12.4, the substance is called a Strong base. Hence, option C is correct.

When a substance is dissolved in water, H⁺ hydrogen ions are formed. These substances are called Acids. H⁺ ions are positive ions and hence, they donate protons to other substances.

When a substance is dissolved in water, OH⁻ hydroxyl ions are formed. These substances are called Bases. OH⁻ ions are negative ions that are capable of accepting the protons/hydrogen ions.

Acids are substances having more hydrogen ions than hydroxyl ions and it has a sour taste. Bases are substances having more hydroxyl ions than hydrogen ions and it has a bitter taste.

The acids and bases are differentiated by using the pH scale. pH represents the potential of hydrogen which measures the hydrogen and hydroxyl ions. It is a negative logarithm of H⁺ ion concentration.

The pH scale ranges from 0-14. The neutral power in the pH scale is 7 and the water shows the neutral range. If pH shows less than 7 it is an acidic solution and litmus paper turns red.        

If pH shows greater than 7, it is a base or alkaline solution and the litmus paper turns blue.  Weak bases range from 7.3-10. Strong bases range from 10-14.  

Hence, the pH shows 12.4, which represents a strong base. Thus, the correct solution is C.  

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Answer:

Liquid

Explanation:

Water...

- below 0 degrees Celsius is a solid.

- above 0 degrees Celsius is a liquid.

- above 100 degrees Celsius is a gas.

Given data:

* The total current in the system is I = 2.8 A.

* The resistance of resistors connected in parallel is,

Solution:

The equivalent resistance of the system is,

Substituting the known values,

According to Ohm's law, the voltage across the battery in terms of the current and equivalent resistance is,

Thus, the voltage across the battery is 21.5 volts.

The distance between the dog and the ball's location is 42 meters, and the dog was able to cover this distance in 28 seconds at a speed of 1.5 m/s.

The distance to the ball's location can be determined by using the formula:

distance = speed × time.

To understand this calculation, it is important to remember that speed is the rate at which an object moves, typically measured in meters per second (m/s).

In this scenario, the speed of the dog is given as 1.5 m/s and the time taken to retrieve the ball is 28 seconds. Therefore, the distance she covers to the ball's location is:

distance = speed × time

distance = 1.5 m/s × 28 s

distance = 42 meters

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The horizontal force exerted by air resistance on the bucket is 5,210 N.

The horizontal force exerted by air resistance on the bucket is the parallel force on the cable carrying the bucket.

The magnitude of this force is calculated as follows;

Fx = mg cosθ

where;

Fx = (590 x 9.8) x cos(25.7)

Fx = 5,210 N

Thus, the horizontal force on the bucket is determined from parallel force on the rope.

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Answer:

106.8

Explanation:

If you multiply 6 and 17.8, you'll get 106.8.

If that's wrong, my apology's !

Answer:

positive acceleration.

Explanation:

As its slowing down gradually, its positive acceleration. When the ball slows down, its acceleration vector is in the opposite direction of its motion. Therefore positive acceleration.

Answer:

b. Red light is transmitted through and reflected by the glass

Explanation:

Give me brainliest plz!

All of the wavelengths of the red light are absorbed when it passes through a translucent red glass window, but the red light is transmitted and reflected.

Therefore, the correct answer is option b) Red light is transmitted through and reflected by the glass.

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The optical device that shuts down the machine any time the light field is broken is a(n): a. Photoelectric device.

This device uses light to detect the presence of an object and triggers a response when the light field is interrupted.

Certain light-sensitive materials may emit electrons, modify their capacity to conduct electricity, or produce an electrical potential, or voltage, across two surfaces when light strikes them. Photoelectric devices are those that rely on these effects to function.

Numerous uses can be made for photoelectric devices. A photoelectric device can open doors automatically or start a counter on an assembly line by acting as an optical switch that detects the interruption of a light beam.

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The matter in the accretion disc is heated to extremely high temperatures, which ultimately lead to the emission of photon radiations, as the speed of the infalling particles becomes more random or chaotic.

We are aware that disordered microscopic particle motion, as defined, is thermal motion and is hence directly related to temperature. The most significant features in the universe are accretion discs, which can be found even in tight binary stars, surrounding smaller stars or stellar remnants, in spiral galaxy centers, in quasars, and they can even form in gamma-ray bursts. The shape of the accretion disc might vary. It could be planar or spherical.

They are bumping into other gas particles as they move. As a result, the movement's direction changes, and it now moves randomly. Particles that are travelling at random make up gas.

They are bumping into other gas particles as they move.

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The gas has a higher density of bigger particles. The motions of an accretion disc are easier on smaller particles than on larger ones. The density of the material (also known as its specific mass).

Mass in volume per unit. Although density can also be symbolised by the Latin letter D, the most typical mark is (the lower case Greek letter rho). A essential quality of a body is its mass. It was widely believed to be connected to the volume of matter in a physical body before to the atom's discovery and the development of particle physics. Theoretically, the same chemical might be included in different atoms and elementary particles. A essential quality of a body is its mass.

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If a comet were to orbit the sun with a highly eccentric orbit and an average (semimajor axis) distance of 1 au, we might use Kepler's third law of planetary motion to determine that each orbit would take one year to complete.

To find the answer, we need to know about the Kepler's third law of planetary motion.

                       \(a=1AU\\T=(1)^{3/2}=1 year\)

Thus, we can conclude that, If a comet were to orbit the sun with a highly eccentric orbit and an average (semimajor axis) distance of 1 au, we might use Kepler's third law of planetary motion to determine that each orbit would take one year to complete.

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(a) In a parallel-flow arrangement, the outlet temperature of the water and the air can be determined using the energy balance equation. The heat transfer rate between the water and the air is equal to the product of the water mass flow rate, specific heat capacity of water, and the change in temperature of the water:

Similarly, the heat transfer rate between the air and the water is equal to the product of the air mass flow rate, specific heat capacity of air, and the change in temperature of the air:

Since the heat exchanger is operating under fully-developed flow conditions, the outlet temperature of the water and the air can be found by equating the heat transfer rates:

By substituting the given values, including the specific heat capacities of water and air, and solving the equations, the outlet temperatures of the air and water can be calculated.

(b) In a counter-flow arrangement, the outlet temperatures of the air and water can be determined using a similar energy balance equation. However, in this case, the change in temperature of the air is taken as the difference between the outlet and inlet temperatures of the air:

Again, by equating the heat transfer rates, substituting the given values, and solving the equations, the outlet temperatures of the air and water in a counter-flow arrangement can be calculated.

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Complete question is;

A bicycle and a car start their journey at the same time the cyclist reaches it's top speed of 10m/s in 15 s, the car reaches a speed of 15 m/s in 55 s. which has the greater acceleration the car or the bicycle.

Answer:

The bicycle has the greater acceleration.

Explanation:

Cyclist reaches a top speed of 10m/s in 15 s.

Formula for acceleration here is;

a = v/t

a = 10/15

a = 0.67 m/s²

Car reaches a speed of 15 m/s in 55 s.

Thus;

a = 15/55

a = 0.27 m/s²

From the 2 acceleration values gotten, we can say that;

The bicycle has the greater acceleration.

Answer:

Verdadera.

Explanation:

La caloría se puede definir como una unidad estándar utilizada para medir la cantidad de energía presente en un organismo vivo.

Una caloría (cal) es la cantidad de transferencia de energía necesaria para elevar la temperatura de 1 g de agua de 14,5 °C a 15,5 °C.

Generalmente, es una unidad de medida de energía e igual a 4,1855 julios.

Answer:

M = 1.994 × 10^(30) kg

Explanation:

We are given;

Orbital radius; r = 1.5 × 10^(8) km = 1.5 × 10^(11) m

Gravitational constant; G = 6.67 × 10^(-11) N.m²/kg²

If the orbit is circular, the it means the gravitational force is equal to the centripetal force.

Thus; F_g = F_c

GMm/r² = mv²/r

Simplifying gives;

GM/r = v²

M = v²r/G

Now, v is the speed of the earth around the sun and from online sources it has a value of around 29.78 km/s = 29780 m/s

Thus;

M = (29780^(2) × 1.5 × 10^(11))/6.67 × 10^(-11)

M = 1.994 × 10^(30) kg

Answer:

The Convex Mirror is used.

Explanation:

A. Net force equals zero. The net force acting on the Smith car is equal to zero.

This is because the car is traveling in a straight line at a constant speed, meaning that the forces acting on the car are balanced. The car is being propelled forward by an applied force, such as the engine, and this force is counteracted by the force of friction from the ground. The net force is the sum of all these forces, and since they are all balanced, the net force is also equal to zero.

Cruise control helps maintain a constant speed, as it adjusts the engine power to counteract the changing frictional forces on the car. This ensures that the forces on the car remain in balance, so the net force remains equal to zero.

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When a hydrogen atom is placed in an external magnetic field, it causes the energy sublevels to split due to the Zeeman effect.

Here's a scheme of the unfolding of energy sublevels originating from the n=2 level:

Level n=2:

Sublevel n=2, l=0, ml=0: This is the 2s sublevel. The quantum state is (2, 0, 0, ms).

Sublevel n=2, l=1, ml=-1: This is the 2p sublevel with ml=-1. The quantum state is (2, 1, -1, ms).

Sublevel n=2, l=1, ml=0: This is the 2p sublevel with ml=0. The quantum state is (2, 1, 0, ms).

Sublevel n=2, l=1, ml=1: This is the 2p sublevel with ml=1. The quantum state is (2, 1, 1, ms).

In the presence of a magnetic field, each of these sublevels will further split into multiple energy states due to the different orientations of the electron's magnetic moment. The quantum state ms represents the electron's spin orientation, with ms=+1/2 for spin-up and ms=-1/2 for spin-down.

The specific energy values and the number of resulting energy states depend on the strength of the magnetic field.

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Answer:

Explanation:

1, i, π, e, and φ

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

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Let's see

For series connection

\(\\ \rm\Rrightarrow R_{eq}=R_1+R_2+R_3\dots\)

For parallel connection

\(\\ \rm\Rrightarrow \dfrac{1}{R_{eq}}=\dfrac{1}{R_1}+\dfrac{1}{R_2}+\dfrac{1}{R_3}\dots\)

Answer: rarefaction

Explanation: correct answer on a p e x

Rarefaction term describes an area of low density in a longitudinal wave.

Wave is a disturbance in a medium that carries energy as well as momentum . wave is characterized by amplitude, wavelength and phase. Amplitude is the greatest distance that the particles are vibrating. especially a sound or radio wave, moves up and down. Amplitude is a measure of loudness of a sound wave. More amplitude means more loud is the sound wave.

Wavelength is the distance between two points on the wave which are in same phase. Phase is the position of a wave at a point at time t on a waveform.

There are two types of the wave longitudinal wave and transverse wave. Longitudinal wave : in which, vibration of the medium (particle) is parallel to propagation of the wave. Sound wave is a longitudinal wave. Transverse wave : in which, vibration of the medium (particle) is perpendicular to propagation of the wave. Light wave is a transverse in nature wave.  

In Longitudinal wave, wave carries energy and momentum with compression and rarefaction. Compression is region of high density, in this region particles of the medium is compressed. rarefaction is region of expansion and it is low density region of longitudinal wave.

Hence option C is correct.

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Wilam's error is best described as the light with a lower frequency than the threshold of the electron could not eject the electron.

It is a phenomenon in which electrons are ejected from the metal surface when light strick the surface.

The photons of light collide with the electrons in the metal atoms and transfer their energy to electrons. Thus electrons leave the surface of the metal.

The light with a higher frequency has high-energy photons which increase the kinetic energy of the ejected electrons.

The threshold is the minimum energy that a photon must have to eject the electron.

Therefore, Wilam's error is best describes as the light with a lower frequency than the threshold of the electron could not eject the electron.

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Answer: None

Explanation:

    Since the wall did not move, it does not matter how much force you generated. You did no work in the physics sense.

    Work is calculated by multiplying the displacement by the force. Since there was no displacement (no movement) we put the value as 0. 0 times anything is still 0, as shown below.

2500 N * 0 = 0.

    You did no work, or 0 J of work.

Answer:

Since there is no external force overall momentum of the system is constant which is zero.

⇒Mv 1+mv 2 =0

⇒600(v 1 )+15(500)=0

⇒v1≈7500 -- 600

⇒v 1 =−6900m/s

So, cannon will recoil at the speed of 6900m/s

Explanation:

v2 = - 2 m/s

From the above condition, the negative sign demonstrates that the speed of the weapon is inverse to the speed of the projectile. it implies the weapon will pull back

Last speed (v) of an item rises to starting speed (u) of that article in addition to speed increase (a) of the item times the passed time (t) from u to v.

Speed (v) is a vector amount that actions uprooting (or change ready, Δs) over the adjustment of time (Δt), addressed by the situation v = Δs/Δt.

1)

Answer:

d. 12.25J

------------------------

2)

According to the conservation of energy:

Answer:

b. 12.25

-------------------------------

3)

Answer:

d. 0 kg∙m/s

-----------------------------------------

4)

Using conservation of momentum:

Answer:

b. 0 kg•m/s