The 2.50 kg cube in the figure has edge lengths d = 6.50 cm and is mounted on an axle
through its center. A spring (k = 900 N/m) connects the cube's upper corner to a rigid wall.
Initially the spring is at its rest length. If the cube is rotated 2.00° and released, what is the
period of the resulting SHM?​

Answer:

B) Force = 7.5, Time = 2 is equal to an impulse of 15 units

It totally depends on WHAT the units are.

IF the force is 7.5 Newtons AND the time is 2 seconds, THEN the impulse is 15 newton-seconds or 15 kg-m/sec. (choice-B)

If either of them isn't, then it isn't.

Final answer:

The correct answer is D. 0 m/s. This is because the ball has no initial vertical velocity when launched horizontally from a cliff.

Explanation:

The initial vertical velocity for a ball launched horizontally from a cliff would be 0 m/s. This is because when an object is thrown horizontally, it means that all of its initial velocity is in the horizontal direction, and thus it has no initial vertical velocity.

Looking at our options:

Ek = 6KJ.

In physics, the kinetic energy of a body or object is the one that owns due to its movement and is given by the equation [tex]E_{k} = \frac{1}{2} mv^{2}[/tex], where m is the mass of the object in kilograms and v is the velocity in m/s.

An object that it has a mass of 30 kilograms and moves with a velocity of 20m/s, its kinetic energy is given by:

[tex]E_{k} = \frac{1}{2} (30kg)(20m/s)^{2}=6000J=6KJ[/tex]

Answer:

Work and time needed to the work

Explanation:

Power is defined as follows:

[tex]P=\frac{W}{t}[/tex]

where

P is the power

W is the work done

t is the time needed to do the work

Since the work can also be rewritten as the product between force (F) and displacement (d):

W = F d

The power can be also rewritten as

[tex]W=\frac{Fd}{t}[/tex]

But [tex]\frac{d}{t}[/tex] is equal to the velocity, v; so, power can be rewritten as product between force and velocity:

[tex]P=Fv[/tex]

Answer:

the answer is to safeguard Americans rights took the test

Explanation:

C. To safeguard American's rights

The bill of Rights is the name given to the primary 10 amendments to our constitution. The bill of Rights consists of guarantees of civil liberties and checks on state power; it was introduced in order to convince states to ratify the constitution.

the 3 most important Bill of Rights

The Bill of Rights lists essential rights to be protected

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Answer:

B

Explanation:

A. False.  Their mass does not affect when they reach the water.

B. True.  Daisy will reach the water in 1 second.

C. False.  Damon will reach the water in more than 1 second.

D. False.  Daisy reaches the water first.

Answer:

D. move independently.

Explanation:

To be considered a living thing, an organism must be able to move independently.

Answer:

To be considered a living thing, an organism must be able adapt to change.

Answer:

Earth's spin on its axis causes the equator to bulge

Explanation:

The Earth is not a perfect sphere but an oblate ellipsoid. The force that holds a planet is gravity. The Earth is rotating on its axis at a speed of 460 m/s at the equator. Due to this reason there is a build up of centrifugal force on the Earth which causes it to expand giving it a bulge.

The Sun and the Moon's gravity causes waves on the surface of large water bodies.

No.

Uniform motion means no acceleration ... speed and direction are not changing.

Uniform motion involves moving at a constant velocity, while non-uniform motion entails changes in speed or direction. Uniformly accelerated motion changes velocity over time and is not uniform. Uniform circular motion has a constant speed but changes direction, while non-uniform circular motion changes in speed and possibly acceleration.

Uniform motion occurs when an object moves at a constant velocity, meaning that it covers equal distances in equal intervals of time regardless of the length of the interval. On the other hand, non-uniform motion involves changes in the speed or direction of the object, meaning the object does not cover equal distances in equal time intervals, which can include speeding up, slowing down, or changing direction.

Uniformly accelerated motion is not considered uniform motion because, even though the acceleration is constant, the velocity of the object changes over time. Specifically, in uniformly accelerated motion, the object’s speed increases or decreases at a steady rate, leading to a change in velocity.

Uniform circular motion refers to an object moving along a circular path with a constant speed, which means that the object’s velocity is constant in magnitude, but changing in direction. This is a special type of uniform motion because it involves constant speed but the direction is continually changing, which implies the presence of acceleration. Conversely, non-uniform circular motion refers to when an object is traveling along a circular path but with a changing speed, which can also mean changing acceleration.

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Answer:

Constructive

Explanation:

Superposition of two wave crests produces constructive interference.

Answer:

Superposition of two wave crests produces destructive interference.

Explanation:

You may have already let your phone ring near the speakers of a computer and noticed that they started to sizzle. You must also have heard that, when traveling by plane, the cell phone must be turned off to avoid failures in the communication devices. Both cases have the same reason: wave interference. Waves are energetic pulses that propagate through space periodically. When two waves overlap in the same region of space, interference occurs, which results in another wave with different intensity. These inferences can be either constructive or destructive.

The superposition of two wave crests produces destructive interference. This type of inference occurs when two waves that meet have different phases, so that one annihilates the other. The result is a wave with zero amplitude.

Answer:

A. [tex]0.5 m/s^2[/tex]

Explanation:

The average acceleration is equal to the ratio between the change in velocity and the time elapsed:

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

The change in velocity between t=0 s and t=10 s is the change on the vertical axis:

[tex]\Delta v = 5 -0 = 5 m/s[/tex]

Whule the time interval is

[tex]\Delta t = 10 s[/tex]

So the average acceleration is

[tex]a=\frac{5 m/s}{10 s}=0.5 m/s^2[/tex]

Answer:

A

Explanation:

plato

Hello There!

Relative density is another word for specific gravity. Relative density is comparing the density of one thing to the density of another. Most of the time, you look at the density of water so we look at the density of an object relative to the density of water.

An object's momentum is the product of its mass and its velocity:

p = mv

p is its momentum, m is its mass, and v is its velocity.

Given values:

p = -80kg×m/s

m = 8kg

Plug in these values and solve for v:

-80 = 8v

v = -10m/s

Choice D

The velocity is Option D. -10 m/s

v = p/m

v = velocity

p = momentum

m = mass of the object

An object's momentum exists as the product of its mass and its velocity:

p = mv

p is its momentum, m exists its mass, and v stands for its velocity.

Given values:

p = -80kg×m/s

m = 8kg

Plug in these values and solve for v:

-80 = 8v

v = -10m/s

The velocity is Option D. -10 m/s

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Answer:

Electrons jump between energy levels, absorbing and releasing energy as they are jumping between energy levels. The energy given off corresponds to different frequencies of light. If the light is visible, we see these frequencies as different colors.  

Electrons play a crucial role in producing light. When an electron gains energy, it moves to a higher energy level and quickly returns to its original level, releasing the excess energy as a photon. The energy of the photon determines its color or wavelength, allowing scientists to manipulate light color and intensity by controlling electron energy levels.

Electrons play a crucial role in producing light. When an electron in an atom gains energy, it moves to a higher energy level or orbital. However, this excited state is unstable, so the electron quickly returns to its original energy level, releasing the excess energy in the form of a photon, which is a particle of light.

The energy of the photon determines its color or wavelength. For example, blue light has a higher energy than red light. By controlling the energy levels of electrons in objects such as light bulbs or LEDs, scientists and engineers can manipulate the color and intensity of light produced.

This phenomenon is seen in fluorescent lights, where electricity is used to excite electrons in a gas, causing them to release photons. These photons then strike a material called a phosphor, which emits visible light. So, without electrons and their ability to gain and release energy, we wouldn't have light as we know it.

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Answer:

Hi there!

The answer is: A. True

Initially, the velocity vector is [tex]\langle 38cos(40^{\circ}),38sin(40^{\circ}) \rangle=\langle 29.110, 24.426 \rangle[/tex]. At the same height, the x-value of the vector will be the same, and the y-value will be opposite (assuming no air resistance). Assuming perfect reflection off the ground, the velocity vector is the same. After 0.2 seconds at 9.8 seconds, the y-value has decreased by [tex]4.9(0.2)^2[/tex], so the velocity is [tex]\langle 29.110, 24.426-0.196 \rangle = \langle 29.110, 24.23 \rangle[/tex].

Converting back to direction and magnitude, we get [tex]\langle r,\theta \rangle=\langle \sqrt{29.11^2+24.23^2},tan^{-1}(\frac{29.11}{24.23}) \rangle = \langle 37.87,50.2^{\circ}\rangle[/tex]

Answer:

A. ionic crystal

Explanation:

Crystal lattice is the ordered arrangement of molecules in a crystal. There are different form of arrangement in which molecules of crystals can be put to. When ions in a crystal are arranged in such a way that opposite charges are aligned and are held by an electrostatic force of attraction, an ionic crystal is formed.

Answer:when a wave moves from a dense medium to a less dense medium most of the wave energyis refracyed.

Explanation:

Answer: reflected

Explanation: A P E X

For a wave:

v = fλ

v is the velocity, f is the frequency, and λ is the wavelength.

Assuming the velocity of the wave doesn't change...

If you increase its frequency, its wavelength will shorten.

Answer:

As the frequency of a wave increases, the shorter its wavelength is.

Explanation:

Answer:

(i) 0.121 kg m²

(ii) 0.363 kg m²/s

(iii) 2 rad/s

Explanation:

(i) The moment of inertia of a rod about its end is:

I = 1/3 mr²

where m is the mass and r is the length.

Given m = 1.2 kg and r = 0.55 m:

I = 1/3 (1.2 kg) (0.55 m)²

I = 0.121 kg m²

(ii) Angular momentum is the moment of inertia times the angular velocity:

L = Iω

L = (0.121 kg m²) (3 rad/s)

L = 0.363 kg m²/s

(iii) This time, the moment of inertia of the putty is included.

I = 1/3 mr² + Mr²

I = 0.121 kg m² + (0.2 kg) (0.55 m)²

I = 0.1815 kg m²

Angular momentum is conserved:

L = Iω

0.363 kg m² = (0.1815 kg m²) ω

ω = 2 rad/s

Answer:

the correct answer is ferromagnetic.

The substance which can get easily magnetized is a ferromagnetic substance.

Explanation:

The magnetic properties of a substance classifies any substance into two kinds of substances or materials. These are ferromagnetic substances or the paramagnetic substances.

These two have been classified on the basis of being magnetized. Ferromagnetic substances gets easily magnetized whereas the paramagnetic substances do not get magnetize easily.

Examples of ferromagnetic substances: Iron, Cobalt or Nickel.

A person riding a bicycle past a tree while wearing a helmet is moving relative to the tree, the bicycle, and the helmet. This is a concept in physics known as frames of reference, implying movement and direction are dependent on the perspective of observation.

When a person rides a bicycle past a tree while wearing a helmet, the person is moving relative to the tree, the bicycle, and the helmet. That is to say, if you were observing from the cyclist's perspective, everything would be moving: the tree as they pass, the bicycle beneath them, and even their helmet.

This is typical of what we discuss in physics as frames of reference, with the notion of relative movement. While the tree appears to move in one direction, the bicycle and helmet in another, everything depends on your perspective or your frame of reference.

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Answer:

The Core, Radiation Zone, Convection Zone, Photosphere, Chromosphere, and the Corona.

Explanation:

The Sun has 6 different region which constitutes it completely which are namely from the outermost part to innermost part as follows,

Corona, Chromosphere, Photosphere, Convection Zone, Radiation Zone, Core.

Explanation:

The innermost part is the core of the Sun which has its 25 percent of presence in respect to the radius of the Sun. Next is the Radiation zone comprising the 45 percent of the radius with another 30 percent covered with the convection zone of the Sun.

The atmosphere of the sun contains the outer three parts as Photosphere, Chromosphere and the Corona. The level of heat increases on the way up in atmosphere.

Answer:

Concentric with the wire

Explanation:

The magnetic field around a long, straight current-carrying wire forms concentric lines around the wire itself. The magnitude of the field is given by:

[tex]B=\frac{\mu_0 I}{2\pi r}[/tex]

where

[tex]\mu_0[/tex] is the magnetic permeability

I is the current in the wire

r is the distance from the wire

The direction of the lines of the field can be determined by using the right-hand rule: the thumb of the right hand points in the same direction as the current, and the other fingers (wrapped around the thumb) gives the direction of the field lines.

Answer:

concentric with the wire

Explanation:

Answer: -194 mph

Explanation:

Taking into account the Sun as the center (origin, point zero) of the reference system, the velocity of the spacecraft relative to the Sun [tex]V_{R-S}[/tex] is:

[tex]V_{R-S}=126mph[/tex]  Note it is positive because the spacecraft is moving away from the Sun

Taking into account the spacecraft as the center of another reference system, the velocity of the asteroid relative to the spacecraft [tex]V_{A-R}[/tex] is:

[tex]V_{A-R}=-68mph[/tex] Note it is negative because the asteroid is moving towards the spacracft.

Now, the velocity of the asteroid relative to the Sun [tex]V_{A-S}[/tex] is:

[tex]V_{A-S}=V_{A-R}-V_{R-S}[/tex]

[tex]V_{A-S}=-68mph-126mph[/tex]

Finally:

[tex]V_{A-S}=-194mph[/tex] This is the velocity of the asteroid relative to the Sun and its negative sign indicates it is moving towards the Sun.

The asteroid's velocity relative to the spacecraft (68 mph) from the spacecraft's velocity relative to the sun (126 mph), resulting in 58 mph.

The question involves calculating the velocity of the asteroid relative to the sun, given its velocity relative to a spacecraft and the spacecraft's velocity relative to the sun. To do this, we need to add the velocities, taking into account the direction each one is moving.

Since the asteroid is moving in the opposite direction to the spacecraft relative to it, we subtract the asteroid's velocity from the spacecraft's velocity. The spacecraft's velocity relative to the sun is 126 mph. Therefore, we subtract the asteroid's relative velocity of 68 mph from this to find the asteroid's velocity relative to the sun.

The asteroid's velocity relative to the sun = spacecraft's velocity relative to the sun - asteroid's velocity relative to the spacecraft = 126 mph - 68 mph = 58 mph.

Thus, the asteroid is moving at 58 mph relative to the sun.

Answer:

false

Explanation:

because

scalar quantity :has only magnitude but no direction

vector quantity : has both magnitude and direction

Explanation:

B.

The final thermal energy of the system is the sum of the original internal energy of the system and the change in energy of the system (ΔE). When the piston does work (W), all the thermal energy is transferred to kinetic energy.

The law of conservation of energy states that the total energy of a closed system remains constant over time. This includes both mechanical and thermal energies, where mechanical energy is the sum of kinetic and potential energy, and is conserved in the absence of external forces. The first law of thermodynamics encompasses this principle through the statement that the change in internal energy of a system is equal to the heat added to the system plus the work done on it. So the correct option is A.

The law of conservation of energy in a closed physical system indicates that the total energy within the system remains constant over time. This concept is articulated in the question which concerns how mechanical and thermal energies are conserved within such a system. To clarify, none of the answer choices directly match the principles of energy conservation as generally understood in physics. However, using the information provided, we can explore the principles relevant to the question.

In a closed system, mechanical energy, which includes both kinetic and potential energy, is conserved unless acted upon by external forces. If a piston does work (W), it may convert some of the system's internal energy to kinetic energy, but the total mechanical energy of the system will not change. This aligns with the principle that during any process, the change in a system's mechanical energy will be equal to the work done on the system minus any heat transfer (Q).

According to the first law of thermodynamics, the change in internal energy of a system (ΔE) is equal to the heat added to the system (Q) plus the work done on the system (W). This statement encompasses the conservation of thermal energy as part of the system's total energy. The energy may shift between mechanical and thermal forms, but the total remains the same.

Therefore, the interpretation of the law of conservation of energy should reflect these ideas, and none of the answer choices provided perfectly do so. The closest is perhaps option A, which mentions the transfer of mechanical energy and the work done by the piston, but the phrasing about energy differences is not accurate.

Answer:

(C) 2P

Explanation:

Ideal gas law states:

PV = nRT

n (the number of moles) and R (ideal gas constant) are constant, so we can say:

(PV / T) before = (PV / T) after

Chamber X starts at pressure P, volume V, and temperature T.  At equilibrium, the pressure is Px, the volume is Vx, and temperature 3T.

PV / T = Px Vx / 3T

Chamber Y starts at pressure P, volume V, and temperature T.  At equilibrium, the pressure is Py, the volume is Vy, and temperature T.

PV / T = Py Vy / T

Substituting and simplifying:

Px Vx / 3T = Py Vy / T

Px Vx / 3 = Py Vy

Since the chambers are at equilibrium, Px = Py:

Vx / 3 = Vy

Vx = 3 Vy

The total volume is the same as before, so:

Vx + Vy = 2V

Substituting:

(3 Vy) + Vy = 2V

4 Vy = 2V

Vy = V / 2

Now if we substitute into our equation for chamber Y:

PV / T = Py (V/2) / T

PV = Py (V/2)

Py = 2P

The pressure in chamber Y (and chamber X) doubles at equilibrium.

The gas pressure of chamber Y at the equilibrium after the

heating is 2P.

This is defined as the equation of state of a hypothetical ideal gas and it is depicted by the following below:

PV = nRT

We can infer that the number of moles(n) and R (ideal gas constant) are constant

PV / T (Initial) = PV / T (Final)

We were told that Chamber X starts at pressure P, volume V, and temperature T.  At equilibrium, the pressure is Px, the volume is Vx, and temperature 3T.

PV / T = P V / 3T

We were also told that Chamber Y starts at pressure P, volume V, and temperature T.  At equilibrium, the pressure is Py, the volume is Vy, and temperature T.

PV / T = Py Vy / T

Substitute into the equation:

Px Vx / 3T = Py Vy / T

Px Vx / 3 = Py Vy

At equilibrium, the chambers are : Px = Py:

Vx / 3 = Vy

Vx = 3 Vy

The total volume is the same as before, so:

Vx + Vy = 2V

Substitute into the equation

(3 Vy) + Vy = 2V

4 Vy = 2V

Vy = V / 2

Substitute into our equation for chamber Y:

PV / T = Py (V/2) / T

PV = Py (V/2)

Py = 2P

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Answer:

wrist watch

Explanation:

The energy stored in a spring of a watch is potential energy which is as a result of winding of the string. This energy is used to run the watch as it converts this potential energy to rotational kinetic energy.

"Wrist watch" stores the least electrical potential energy within their capacitors. A further explanation is below.

Thus the response above is appropriate.

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