A student uses a spring scale to exert a horizontal force on a block, pulling the block over a smooth floor. The student repeats the procedure several times, each time pulling the block from rest through a distance of 1.0 m. For which of the following graphs of force as a function of distance will the block be moving the fastest at the end of the 1.0m?

I know this (pic attached) is the answer, but I don’t understand why…pls help me out thank you!

Answer:

17.6 m/s²

Explanation:

Given:

\(v_{f}\) = 90 m/s (final velocity)

\(v_{i}\) = 2 m/s (initial velocity)

Δt = 5s (change in time)

The formula for acceleration is:

\(a_{avg}\) = Δv / Δt

We can find Δv by doing

Δv = \(v_{f}\) - \(v_{i}\)

Replace the values

Δv = 90m/s - 2m/s

Δv= 88m/s

Using the equation from earlier, we can find the acceleration by dividing the average velocity by time.

\(a_{avg}\) = Δv / Δt

\(a_{avg}\) = \(\frac{88m/s}{5/s}\)

acceleration = 17.6 \(m/s^{2}\)

Answer:

4.5 m

Explanation:

multiply 0.90 by 5

Answer:

the momentum would be 8629.6kgm/s

Explanation:

mass = 322kg

velocity = 26.8m/s

the formula for momentum is

p = m × v

by substituting into the formula

p = 322kg × 26.8m/s

p = 8629.6kgm/s

In a binary system composed of two main-sequence stars (one is G-type and another is K-type), the K-type star will become a post-main-sequence star first. Option a.

The post-main sequence phase is a phase of stellar evolution during which a star is no longer burning hydrogen in its core, and its outer envelope expands and cools as it ascends the red giant branch. A star that has consumed all of the hydrogen in its core (in the main-sequence phase) will exit the main-sequence phase and become a post-main sequence star. Its outer envelope will expand, cool, and begin to shine more brightly as it ascends the red giant branch.

To put it simply, a K-type star (a cooler and less massive star) has less fuel and burns it more quickly than a G-type star, which is hotter and more massive. Because K-type stars consume their hydrogen fuel faster, they reach the post-main sequence stage faster than G-type stars. Therefore, in a binary system composed of a G-type star and a K-type star, the K-type star will become a post-main sequence star first. Answer: a. the K-type star

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Force(F) = 350 N

Work (W)= 0 J

Apply the formula:

Work = Force x Distance

Isolate distance(d)

Distance = Work/ Force

d = W/F = 0 /350 = 0 m

The distance that the object traveled is 0 (zero)

The time taken by each object to reach the bottom of the incline depends on its moment of inertia. The moment of inertia is a measure of how an object's mass is distributed around its axis of rotation.

The moment of inertia for a solid sphere is higher compared to that of a hollow sphere and a disc. This is because the mass is distributed farther from the axis of rotation in a solid sphere, resulting in a larger moment of inertia.

As a result, the solid sphere will take more time to reach the bottom of the incline compared to the hollow sphere and the disc.

On the other hand, the hollow sphere has the smallest moment of inertia because its mass is concentrated near the surface, closer to the axis of rotation. Therefore, the hollow sphere will take the least time to reach the bottom of the incline.

The disc also has a lower moment of inertia compared to the solid sphere, but it is higher than that of the hollow sphere. Therefore, the disc will take more time than the hollow sphere but less time than the solid sphere to reach the bottom.

The correct answer is (b) the hollow sphere will take the least time to reach the bottom of the incline. The solid sphere will take the most time, and the disc will take a time in between the two.

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Answer:

electrical- mechanical

Explanation:

Smartness 1,000

Friend me too

Answer:

Friction force is the correct answer.

Actually I'm wrong the person who has commented is correct

Answer:

\(418400\ \text{J}\)

Explanation:

m = Mass of water = 2 kg

c = Specific heat of water = \(4184\ \text{J/kg}^{\circ}\text{C}\)

\(\Delta T\) = Change in temperature = \((50-0)^{\circ}\text{C}\)

Change in thermal energy is given by

\(Q=mc\Delta T\\\Rightarrow Q=2\times 4184\times (50-0)\\\Rightarrow Q=418400\ \text{J}\)

Cale's change in thermal energy was \(418400\ \text{J}\).

Sure! Here are the steps for calculating the velocity and distance traveled by the car after 50 seconds :

Step 1: Calculate the velocity using the equation:

\(v = u + at\)

where:

- \(v\) is the final velocity

- \(u\) is the initial velocity (0 m/s, as the car starts from rest)

- \(a\) is the acceleration (3 m/s²)

- \(t\) is the time (50 seconds)

Substituting the values into the equation:

\(v = 0 + (3 \, \text{m/s²}) \times (50 \, \text{s})\)

Step 2: Calculate the distance traveled using the equation:

\(s = ut + \frac{1}{2}at^2\)

where:

- \(s\) is the distance traveled

- \(u\) is the initial velocity (0 m/s)

- \(a\) is the acceleration (3 m/s²)

- \(t\) is the time (50 seconds)

Substituting the values into the equation:

\(s = 0 \times (50 \, \text{s}) + \frac{1}{2} \times (3 \, \text{m/s²}) \times (50 \, \text{s})^2\)

Now, let's simplify these equations:

\(v = 3 \times 50\)

\(s = \frac{1}{2} \times 3 \times 50^2\)

Calculating the results:

\(v = 150\) m/s

\(s = 3750\) meters

Therefore, after 50 seconds, the car will have a velocity of 150 m/s and would have traveled a distance of 3750 meters.

Answer:

b

Explanation:

Two solid spheres with identical charge imbalance of 2 C have radii of 5 cm each. A is an excellent conductor, or sphere A. As an insulator, sphere B's charge is dispersed evenly throughout its volume.

A charge is what?

the sum of money required to purchase something, particularly a service: levy/impose/experience a fee You will be charged if you don't cancel the reservation within the allotted time. the cost of sb/sth Do kids pay anything or are they admitted free minimal or modest charge For this service, we charge a small fee.

What does charge mean in physics and chemistry?

August 8, 2017 update. Charge often refers to electric charge in chemistry and physics, which is a conserved feature of some subatomic particles that governs their electromagnetic interaction. An electromagnetic field exerts a force on matter as a result of the physical attribute of charge.

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Answer:

\(15\:\mathrm{J}\)

Explanation:

The potential energy of an object is given by \(PE=mgh\).

Recall that the weight of an object is equal to the force of gravity on the object. From this, we can set up the following equation and solve for the mass of the object:

\(F=mg,\\5=mg,\\m=\frac{5}{9.81}\approx 0.51\:\mathrm{kg}\)

Now we can plug in values to \(PE=mgh\) and solve:

\(PE=0.51\cdot9.81\cdot3=\fbox{$15\:\mathrm{J}$}\).

Answer:

The potential energy of the body is 15J.

Explanation:

The energy possessed to a body due to position is called Potential energy.

U=mgh

U=mgh

U=5×3=15J

Hence, the potential energy of the body is 15J.

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Maximum heigh: 1.496 m

(This number is not exacte I truncated it)

Explanation:

Data:

mass : m = 0.003 kg

spring constant : k = 220 N/m

amount of compression: x = 2 cm = 0.02 m

heigh : h = ?

accelaratiom due to gravity : g = 9.8ms^-2

Potential Energy : PE = ?

Since you'll be converting the PE to KE, you'll use 2 formulas.

Formulas:

Solution:

In general, the velocity of a galaxy does not depend on its distance from the Earth. However, due to the expansion of the universe, there is a relationship between the distance of a galaxy and its observed velocity known as Hubble's Law.

According to Hubble's Law, the velocity of a galaxy is proportional to its distance from the Earth. This relationship is a consequence of the expansion of the universe. As space itself expands, galaxies located farther away from us are carried away at a faster rate. This means that the recessional velocity of a galaxy, which is the velocity at which it is moving away from us, increases with increasing distance.

However, it's important to note that this relationship holds on large scales and is valid for galaxies that are significantly distant from us. On smaller scales, the motions of galaxies can be influenced by factors such as gravitational interactions with neighboring galaxies or the presence of galaxy clusters.

In summary, while the velocity of a galaxy does not generally depend on its distance from the Earth, there is a correlation between the recessional velocity and the distance due to the expansion of the universe, as described by Hubble's Law.

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Answer:

angular acceleration = change in angular speed / change in time

angular acceleration = 10 rad/s - 6.3 rad/s / 5s

angular acceleration = 3.7 rad/s / 5s

angular acceleration = 0.74 rad/s^2

Answer:

The sun is located in the Milky Way Galaxy.

According to the question the frequency range of visible light is 430 THz to 770 THz.

Frequency is a measure of how often a particular event or phenomenon occurs over a given period of time. It is usually expressed in terms of cycles per unit of time, such as seconds, minutes, hours, days, weeks, months, or years. Frequency can be used to measure anything from the frequency of electrical signals to the frequency of human behavior.

The frequency of visible light is measured in terahertz (THz). The frequency range of visible light is between 430 THz and 770 THz.
This can be calculated by using the formula frequency (f) = speed of light (c) divided by the wavelength (λ).
Therefore, f = 3 * 10⁸ m/s / λ (in meters).
For example, the frequency of light with a wavelength of 700 nm would be calculated as follows:
f = 3 * 10⁸ m/s / (700 * 10⁻⁹ m) = 4.29 * 10¹⁴ Hz = 4.29 THz.
Therefore, the frequency range of visible light is 430 THz to 770 THz.

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480.0 Newtons force is required to lift a 49-newton object with an acceleration of 9.8 m/s2/. The explaination is mentioned below:

To calculate the amount of force required to lift a 49-newton object with an acceleration of 9.8 m/s2, we need to use the formula F = ma, where F is the force required, m is the mass of the object (in this case, 49 newtons), and a is the acceleration (in this case, 9.8 m/s2).
Plugging in the values, we get:
F = 49 x 9.8
F = 480.2 Newtons
Therefore, the amount of force required to lift a 49-newton object with an acceleration of 9.8 m/s2 is 480.2 Newtons.

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Answer:

S waves are transverse and cannot travel through liquids. P waves are longitudinal and can travel through liquids. When an earthquake happens on one side of the Earth, P and S waves can be detected all around the world.  S waves cannot be detected on the opposite side of the earth but can be detected at angles less than or equal to 90 degrees or slightly more. This is because there is a liquid core in the centre of the earth preventing the S waves from travelling to the direct opposite side of the Earth. P waves can be detected all around the world

Explanation:

Answer:

heat energy

Explanation:

heat is the flow of thermal energy. A whole branch of physics

Answer:

Yes

Explanation:

Because the call can evaporate from the water.

Answer:

A centrifuge is utilized to isolated little sums of strong held in suspension from the fluid. For case, chalk from water. The centrifuge contains test-tubes that are spun around at tall speed that causes the strong to sink to the foot of the tube. The fluid is the tapped (poured off) clearing out the strong behind.

Answer:

V = IR

Explanation:

V = voltage

I = current

R = resistance

Answer:

Kepler's third law:

P^2 = K R^3  the period squared is proportional to the cube of the radius

Ps^2 = K Rs^3

Pe^2 = K Re^3

Ps^2 / Pe^2 = Rs^3 / Re^3        dividing equations

Ps = (Rs / Re)^3/2 * Pe

Ps = (1.4E9 / 1.5E8)3/2 * 1 yr

Ps = 28.5 yrs

(Actual = 10759 da / 365.25 da = 29.5)

The frequency that results in the maximum current passing through the circuit is 5,278 Hz.

The resonance frequency of a series RLC circuit is given by:

f = 1 / (2π√(LC))

f = 1 / (2π√(LC))

f = 1 / (2π√(130 x \(10^{-3}\) x 7 x \(10^{-6}\)))

f = 1 / (2π√(0.910 x \(10^{-9}\)))

f = 1 / (2π x 0.00003018)

f = 5,278 Hz

An RLC circuit is an electrical circuit that consists of a resistor (R), an inductor (L), and a capacitor (C) connected in series or parallel. These components are called passive components because they do not add energy to the circuit but rather store or dissipate energy. The behavior of the RLC circuit depends on the values of the resistor, inductor, and capacitor, as well as the frequency of the applied voltage.

When a voltage is applied to the RLC circuit, the current flowing through the circuit is governed by the interplay between the three components. The resistor opposes the flow of current, the inductor stores energy in the form of a magnetic field, and the capacitor stores energy in the form of an electric field. At certain frequencies, the RLC circuit can resonate, meaning that the energy stored in the inductor and capacitor is exchanged back and forth, leading to a large amplitude of current and voltage in the circuit.

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The presence of a magnetic field does not directly alter the wavelength of electromagnetic radiation. However, magnetic fields can indirectly affect the behavior of charged particles, which can lead to changes in the emitted or absorbed wavelengths of light.

The wavelength of electromagnetic radiation is primarily determined by the frequency of the wave and the speed of light in a vacuum, which are intrinsic properties of the wave itself. The magnetic field, on its own, does not have a direct effect on these fundamental properties. Therefore, in the absence of any other factors, the presence of a magnetic field does not increase or decrease the wavelength of electromagnetic radiation.

However, the behavior of charged particles in the presence of a magnetic field can be influenced, which can indirectly impact the wavelength of light emitted or absorbed by those particles. For example, when charged particles move in a circular path under the influence of a magnetic field, such as in a cyclotron, they emit radiation known as cyclotron radiation. This radiation is characterized by a specific wavelength determined by the properties of the particles and the strength of the magnetic field.

In addition, magnetic fields can cause a phenomenon called Zeeman splitting, which occurs when the energy levels of atoms or molecules are affected by the magnetic field. This splitting results in the emission or absorption of light at slightly different wavelengths, known as the Zeeman effect. This effect can be observed in certain situations, such as in the spectra of stars or in laboratory experiments involving magnetic fields.

In summary, while the magnetic field itself does not directly impact the wavelength of electromagnetic radiation, it can affect the behavior of charged particles and subsequently lead to changes in the emitted or absorbed wavelengths of light.

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The electric field E for the Schottky diode is approximately 3.81 x 10^5 V/m.

To calculate the electric field E, we can use the formula:

E = V / d,

where V is the applied voltage and d is the distance from the interface.

Given:

V = -5 V (negative sign indicates reverse bias)

d = 1.2 μm = 1.2 x 10^-6 m

Substituting these values into the formula, we get:

E = (-5 V) / (1.2 x 10^-6 m)

≈ -4.17 x 10^6 V/m

Since the electric field is a vector quantity and its magnitude is always positive, we take the absolute value of the result:

|E| ≈ 4.17 x 10^6 V/m

≈ 3.81 x 10^5 V/m (rounded to two significant figures)

The electric field for the Schottky diode Au-n-Si at V = -5 V and a distance of 1.2 μm from the interface is approximately 3.81 x 10^5 V/m.

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