A 0.5 kg block is attached to a horizontally mounted spring with a natural length of 0.6 m and a spring constant k = 40 N/m. The other endpoint of the spring is fixed in a wall. The block is initially sitting at rest on a horizontal surface that offers friction (k = 0.2). Then a hand exerts a constant horizontal pulling force of 20 N to it until the spring is stretched by 0.25 m. At that point, the hand slips off the block. Calculate, using work-energy methods, how close the block gets to the wall upon its first return (or does it bump into the wall?). Make sure to clearly identify your system and the initial and final state you are considering.

Answer:

skateboard mid-ollie is being actively steered. This is exactly what makes doing an ollie so hard. It's not enough to get the skateboard up into the air - you also have to steer it while it's in the air. You should keep your hands up in the hair a bit to help with balance, scrunch your legs a bit down to have a proper and effective jump. wear nee pads incase you dont fix the landing. Practice jumping on ur skate board tho, if u jump at it without knowing much youll just get hurt.

Explanation:

Mass of the saturn = 5.683 × 10^26 Mass of the mercury = 3.285 × 10^23

Answer:

Planet Mass (in kilograms)

Saturn 5.685 · 1026

Planet Mass (in milligrams)

Saturn 5.685 · 1032

Explanation:

The new momentum of the body is four times greater than its original momentum. Therefore, the magnitude of the momentum increases by a factor of 4. Here option D is the correct answer.

A vector quantity, momentum has both a magnitude and a direction. According to Isaac Newton's second equation of motion, the force applied on a particle is equal to the time rate of change of momentum.

The momentum of an object is given by its mass multiplied by its velocity. So, we can express the momentum of the body as P = mv, where m is the mass and v is the velocity. If we double both the mass and speed of the body, the new momentum of the body would be:

P' = (2m)(2v)

= 4mv

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The total magnification of a specimen viewed through the ocular and oil immersion lens on a light microscope can be calculated by multiplying the magnification of the ocular lens (usually 10x) by the magnification of the oil immersion objective lens (typically 100x). In this case, the total magnification would be 10x * 100x = 1000x.

The total magnification of a specimen when viewed through the ocular and oil immersion lens on a light microscope can vary depending on the specific lenses used. However, a common total magnification for this combination is around 1000x. This is because the ocular lens typically has a magnification of 10x, while the oil immersion lens can have a magnification of 100x. When these two lenses are used together, the total magnification is calculated by multiplying their magnifications, resulting in a total magnification of 1000x.

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Voyager 2 is one of NASA's space probes launched in 1977. Its mission was to explore the outer planets of our solar system, including Jupiter, Saturn, Uranus, and Neptune.

After completing this mission, Voyager 2 continued its journey into interstellar space. According to NASA, Voyager 2 is currently traveling at a speed of about 34,000 miles per hour, and it is expected to reach the nearest stars (besides the Sun) in about 500 years.Voyager 2 is one of NASA's space probes launched in 1977. Its mission was to explore the outer planets of our solar system, including Jupiter, Saturn, Uranus, and Neptune.
The nearest star to our Sun is Proxima Centauri, which is about 4.24 light-years away. Voyager 2 will not reach this star, but it will come within 1.7 light-years of another star system called Ross 248. It will take Voyager 2 approximately 296,000 years to get to Ross 248, but it will pass through the Oort Cloud, a vast collection of icy objects that extends out to about 100,000 astronomical units (AU) from the Sun. This region of space is believed to be the source of most long-period comets.
Voyager 2 has already traveled a remarkable distance and continues to send valuable data back to Earth. Its longevity is a testament to the ingenuity and dedication of the scientists and engineers who designed and built it. While it will be centuries before Voyager 2 reaches the nearest stars, its journey is a reminder of the vastness and wonder of our universe.

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The amount of Energy stored in the inductor is calculated as;  0.3125 J

What is the energy stored in the inductor?

We are given;

Inductance; L = 100 mH

Resistance; R = 4.0 Ω

Voltage; V = 15 V

Internal resistance; r = 2.0 Ω

Formula for current with internal resistance is;

I = V/(r + R)

I = 15/(2 +4)

I = 2.5 A

Formula for energy stored in inductor is;

U = ¹/₂LI²

U =  ¹/₂ * 100 * 10⁻³ * 2.5²

U = 0.3125J

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Answer: 115 N

Explanation:

In this case, the ball has a weight of 15 N (force due to gravity) acting on it and the cannon is shooting it with a force of 100 N.

To find the net force on the ball, we add the forces acting on it.

Net force = force due to gravity + force due to the cannon

Net force = 15 N + 100 N

Net force = 115 N

So, the net force on the ball will be 115 N. ✅

PLEASEEEE GIVE BRANLIEST

The ratio of angular momentum, l₁ to l₂ is 64/135.

Momentum of the object is, p = mv, where m is the mass and v is the velocity. Since the spheres are identical and traveling with the same velocity v₀, the total momentum of the system before the collision is:

p = m₀v₀ + m₀v₀ = 2m₀v₀

After the collision, the two spheres stick together and move as one object. Let's call the velocity of the combined object v'. Then, we have:

2m₀v₀ = (2*m₀ + 3m₀)*v'

v' = (4/5)*v₀

Moment of inertia is, I = (1/3)mr², where m is the mass and r is the radius of sphere. Let's first consider the short rod. The sphere collides with the end of the rod, so the distance between the pivot and the point of impact is r. The moment of inertia of the rod about the pivot is,

I₁ = (1/3)2m₀(2r)² = (8/3)m₀r²

Let's call the angular velocity of the rod after the collision ω1.

l₁ = I₁ω₁ = (8/3)m₀r²ω₁

Now let's consider the long rod. The sphere collides with the center of the rod, so the distance between the pivot and the point of impact is (3/2)*r. The moment of inertia of the rod about the pivot is,

I₂ = (1/12)3m₀(3r)² = (9/4)m₀r²

Angular momentum is, L= Iω, where I is moment of inertia and ω is angular velocity. Let's call the angular velocity of the rod after the collision ω₂.

L₂ = (9/4)m₀r²ω₂

We can use the fact that the linear velocity of the spheres is the same before and after the collision to relate ω₁ and ω₂,

v₀ = r*ω₁ + (3/2)rω₂

Substituting ω₁ = l₁/[(8/3)m₀r²] and ω₂ = l₂/[(9/4)m₀r²],

v₀ = r*l₁/[(8/3)m₀r³] + (3/2)rl₂/[(9/4)m₀r³]

v₀ = (5/6)r(l₁ + l₂)/(m₀*r³)

Now we can solve for the ratio of l₁ to l₂:

l₁/l₂ = (8/9)(2/5)(4/3) = 64/135

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Answer:

lol

Explanation:

The strength or intensity of the magnetic field at a given place in space is referred to as its magnitude.

It is measured in teslas (T) or gauss (G) units, depending on the measuring technique employed. Because the magnetic field is a vector quantity, it possesses both magnitude and direction.

The size of the magnetic field is governed by several parameters, including the current or magnetic charge that generates the field, the distance from the source of the field, and the field's direction with regard to the measuring device.

Magnetic field magnitude can be determined using mathematical methods that account for these parameters, such as the Biot-Savart law or Ampere's law.

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The acceleration of rate mobile is 30 m/s².

Given - Initial velocity=80m/s , Final Velocity=200m/s , time= 4sec

To find out acceleration.

Principle- Acceleration means rate of change of velocity. Mathematically derivative of velocity with the function of time is acceleration.

a=dv/dt

a=(vₙ-v )/dt

substitute vₙ=200m/s  , v=80m/s , dt=4sec

a= [ 200 -80 ]/4

a= 120/4

acceleration ⇒ a=30 m/s²

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Answer:c

Explanation:

Answer:

In which direction does the current in circuit A flow?

counterclockwise

Explanation:

The current flowing through the circuit A is \(I = \frac{e}{r_1 + r_2}\).

"Your question is not complete, it seems to be missing the following information",

find the the current flowing through the resistors in circuit A;

The given parameters;

The equivalent resistance of the circuit A in series is calculated as follows;

\(R_e = r_1 + r_2\)

The emf of the battery connected to circuit A

emf = e

The current flowing through the circuit A is calculated as follows;

\(V= IR\\\\I = \frac{V}{R} \\\\I = \frac{e}{R_e} \\\\I = \frac{e}{r_1 + r_2}\)

Thus, the current flowing through the circuit A is \(I = \frac{e}{r_1 + r_2}\).

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Answer:

You decide to drop two different objects from a tall building and discover that one of the objects lands on the ground five seconds before the other object. What can you conclude? Newton's second law is not valid because each object should experience the same force of gravity and therefore should land at the same time.

Explanation:

You decide to drop two different objects from a tall building and discover that one of the objects lands on the ground five seconds before the other object. What can you conclude? Newton's second law is not valid because each object should experience the same force of gravity and therefore should land at the same time.

You decide to drop two different objects from a tall building and discover that one of the objects lands on the ground five seconds before the other object. What can you conclude? Newton's second law is not valid because each object should experience the same force of gravity and therefore should land at the same time.

The frequency of the weight's motion is 2 Hz, the period is 0.5 seconds, and the amplitude is 12 cm.

The frequency of the weight's motion is the number of complete cycles or oscillations it undergoes per unit of time. In this case, the weight bobs up and down twice each second, so its frequency is 2 Hz.

The period of the weight's motion is the time it takes for one complete cycle or oscillation. Since the weight bobs up and down twice each second, the time for one complete cycle is 1/2 second, or 0.5 seconds.

The amplitude of the weight's motion is the maximum distance it moves from its equilibrium position. In this case, the weight is seen to bob up and down over a distance of 24 cm.

Since the weight oscillates symmetrically around its equilibrium position, the amplitude is half of this distance, which is 12 cm.

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Answer:

change in temperature is a decrease by 268.734 K

Explanation:

We are given;

Temperature: T1 = 0°C = 273 K

Internal diameter; d1 = 8mm

Final diameter; d2 = 1 mm

To solve this, we will use Charles law formula since pressure is constant.

Thus;

V1/T1 = V2/T2

Where T2 is the final temperature.

Now, V1 and V2 are volume

Volume is given by: V = area x height

We are told the cross section is equal except for the diameter.

Thus;

V1 = A1 × h

V2 = A2 × h

Thus;

(A1 × h)/T1 = (A2 × h)/T2

h will cancel out and making T2 the subject, we have;

T2 = (A2 × T1)/A1

A2 = π(d2)²/4

A1 = π(d1)²/4

Thus;

T2 = [(π(d2)²/4) × T1]/(π(d1)²/4)

π and 4 will cancel out to givw;

T2 = ((d2)²× T1)/(d1)²

T2 = (1² × 273)/8²

T2 = 273/64

T2 = 4.266 K

Thus;

Change in temperature = T2 - T1 = 4.266 - 273 = -268.734 K

Thus, change in temperature is a decrease by 268.734 K

Using Newton's 1st law of motion. In the absence of external force, the isolated object maintains its condition of uniform motion. Thus, the spaceship keeps its constant speed throughout all of time. Option D is correct.

According to Newton's first law, unless pushed to alter its condition by the operation of an external force, every object will continue to be at rest or even in uniform motion along a straight line. Inertia is the propensity to maintain balance in a condition of motion.

The word "inertia" is derived from the Latin word iners, which meaning idle or sluggish. Inertia is the name for any physical object's opposition to a velocity change. Changes in the item's motion's direction or speed fall under this category.

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The activity of the sample after 5 hours is 2.5 * 10^9 dps or 2.5 * 10^9 Bq

The activity of a radioactive sample refers to the rate at which its nuclei decay, and it is typically measured in units of disintegrations per second (dps) or becquerels (Bq).

To determine the activity of the sample after 5 hours, we need to consider the concept of half-life. The half-life of a radioactive substance is the time it takes for half of the nuclei in a sample to decay.

Given that the half-life of the nuclei in the sample is 2.5 hours, we can calculate the number of half-lives that occur within the 5-hour period.

Number of half-lives = (Time elapsed) / (Half-life)

Number of half-lives = 5 hours / 2.5 hours = 2

This means that within the 5-hour period, two half-lives have occurred.

Since each half-life reduces the number of nuclei by half, after one half-life, the number of nuclei remaining is (1/2) * (10^10) = 5 * 10^9 nuclei.

After two half-lives, the number of nuclei remaining is (1/2) * (5 * 10^9) = 2.5 * 10^9 nuclei.

The activity of the sample is directly proportional to the number of remaining nuclei.

Therefore, After 5 hours, the sample has an activity of 2.5 * 109 dps or 2.5 * 109 Bq.

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The operator of a vessel is required to stay at least 100 feet clear of a diver's down flag on a river, inlet, or channel.

When a diver is in the water, a down flag is typically displayed to indicate their presence. This flag serves as a signal to boaters to maintain a safe distance and avoid the area where the diver is located. To ensure the safety of both divers and boaters, regulations often require vessel operators to maintain a specific distance from the diver's down flag.

In this case, the required distance is 100 feet, which allows for an adequate buffer zone to prevent any potential collisions or disturbances that could endanger the diver or disrupt their activities.

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The slice of watermelon weighs 0.84 kg more than the apple. This can be solved by simple arithmetic.

To find out how much more the slice of watermelon weighs than the apple, follow these steps:

1. Note the weight of the apple: 0.16 kg
2. Note the weight of the slice of watermelon: 1 kg
3. Subtract the weight of the apple from the weight of the slice of watermelon.

Calculation: 1 kg (watermelon) - 0.16 kg (apple) = 0.84 kg

The slice of watermelon weighs 0.84 kg more than the apple.

The slice of watermelon weighs 1 kg, whereas the apple weighs 0.16 kg. We may deduct the weight of the apple from the weight of the watermelon slice to find how much more the watermelon slice weighs:

1 kilogramme less 0.16 kg equals 0.84 kg

As a result, the watermelon slice weights 0.84 kg more than an apple.

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Centripetal refers to “center-seeking” Quantifies the change in directionof the velocity The acceleration is directed toward the center of the circle of motion.

The magnitude of the centripetal acceleration is given by V^2/r, the direction is toward the center of the circle. The tangential component of the acceleration is due to changing speed. The centripetal component of the acceleration is due to changing direction.

When an object is rotating at a constant angular velocity, the whole object has a constant angular velocity. Therefore, every mint on the turntable has the same, constant angular velocity.

The acceleration which causes the tangential velocity to change direction is called Centripetal acceleration. Centripetal acceleration is always in toward the center of the circle.

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Moving a magnet in and out of a coil will make the needle on the galvanometer move to either side. This phenomenon can be explained in terms of magnetic induction. When the magnet is moved into the coil, the magnetic field lines of the magnet cut across the coil's wire.

This cutting of magnetic field lines induces an electric current in the coil, according to Faraday's law of electromagnetic induction. This induced current flows through the galvanometer, causing the needle to move. The direction of the needle's movement depends on the direction of the current.

When the magnet is moved out of the coil, the magnetic field lines again cut across the coil's wire, inducing a current in the opposite direction. This causes the needle on the galvanometer to move in the opposite direction. In summary, the movement of the magnet in and out of the coil induces an electric current in the coil, which is detected by the galvanometer and causes the needle to move.

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1. Energy ≈ 9.848 × 10^-19 J

2. The N-H bond strength in ammonia is approximately 5.923 kJ/mol.

To calculate the energy required per photon to break the N-H bond in ammonia, we can use the equation:

Energy = (hc) / λ

where:

Energy is the energy per photon

h is Planck's constant (6.62607015 × 10^-34 J·s)

c is the speed of light in a vacuum (2.998 × 10^8 m/s)

λ is the wavelength of light (212 nm = 212 × 10^-9 m)

Let's plug in the values and calculate the energy:

Energy = (6.62607015 × 10^-34 J·s × 2.998 × 10^8 m/s) / (212 × 10^-9 m)

Energy ≈ 9.848 × 10^-19 J

Therefore, the energy required per photon to break the N-H bond in ammonia is approximately 9.848 × 10^-19 J.

To determine the N-H bond strength in terms of kJ per mole, we can convert the energy per photon into energy per mole using Avogadro's constant (6.02214076 × 10^23 mol^-1).

Energy per mole = Energy per photon × Avogadro's constant

Energy per mole = (9.848 × 10^-19 J) × (6.02214076 × 10^23 mol^-1)

Energy per mole ≈ 5.923 kJ/mol

Therefore, the N-H bond strength in ammonia is approximately 5.923 kJ/mol.

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Non-conservative work done is calculated to be = 1.252 kJ. Non-conservative forces are those forces which result in a loss of mechanical energy from the system.

Nonconservative force is when the work depends on the path taken. is An example of a nonconservative force is friction.

Given:

Mass , m = 66.5 kg; Initial speed , u = 1.6 m/s

height of 1.64 m ; Final speed , v = 8.51 m/s

Work done by the non conservative forces is equal to the sum of total change in kinetic and potential energy:

As we know that, W= 1/2*m (v²- u²) + (0 -m*g*h)

=1/2* 66.5 * (8.51²- 1.6²) - (66.5* 9.81 * 1.64)

= 2322.84 -1069.87

= 1252.97 joules

=1.252 kJ

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After the collision, the two cars stick together. Find the final velocity of the two cars would be 0.667 meters per second as per the conservation of the momentum after the collision.

It is the type of collision in which the total momentum as well as the kinetic energy on the system is conserved.

As given in the problem we have to find the velocity of the two cars if, after the collision, the two cars stick together,

As per the conservation of the momentum,

The total initial momentum of the cars before the collision = The total final momentum of the cars after the collision

1 × 2 + 2 × 0  = ( 1 + 2 ) × V

2 + 0 = 3 × V

V = 2 / 3

V = 0.667 meters per second

Thus, after the collision, the two cars stick together, then the final velocity of the two cars would be 0.667 meters per second

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Explanation:

Distance= speed × time

= 6 × 12 m

= 72 m

Answer:

true

Explanation:

the explanation is we would have been roasted if they weren't to weak

No, the object's displacement and distance traveled will be equal; however, because the object's initial position is unknown, the object's position may differ from its displacement and distance traveled.

Because the initial position is not provided, we cannot assert that the displacement or distance equals the position. We might have arrived at a different conclusion if the starting point had been zero, because the distance from zero equals the position.

What precisely do you mean by position, displacement, and distance?

The location of an object (whether a person, a ball, or a particle) at a given point in time is referred to as its position. The displacement of an object is the difference in its position from one time to the next. Distance is the total amount the object has traveled in a certain period of time.

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