Nuclear sizes are expressed in a unit named

A) Fermi
B) Angstrom
C) Newton
D) Tesla

Answer:

Explanation:

The correct option that describes a different evolutionary stage of a star like the sun is:

D) It becomes a white dwarf after exploding as a supernova

This is because a star like the sun does not have enough mass to undergo a supernova explosion. After it has exhausted all the fuel in its core, it will evolve into a red giant and then a planetary nebula, leaving behind a small, hot, dense remnant known as a white dwarf. Supernovae occur in much more massive stars that have cores that can collapse to form a neutron star or black hole.

The particles that are considered nucleons are neutrons and protons. Option B.

Nucleons are particles found in the nucleus of an atom, specifically protons and neutrons.

Protons have a positive charge, while neutrons have no charge, and together they make up the majority of the mass of an atom.

Electrons, on the other hand, are much smaller than protons and neutrons, and they orbit around the nucleus in shells. Since they are not found in the nucleus, electrons are not considered nucleons.

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Answer:

C

Explanation:

it is C because science is an acquiring and defining of knowledge.

The displacement at which the kinetic energy and potential energy of a particle executing SHM will be equal when the amplitude is 3cm is 1.5cm.

The amplitude of simple harmonic motion affects the ratio of kinetic to potential energy at a specific displacement in the following way: as the amplitude increases, the ratio of kinetic to potential energy decreases. This is because the amplitude represents the maximum displacement from the equilibrium position, and as the amplitude increases, the potential energy of the particle increases, while the kinetic energy remains constant. Therefore, at a specific displacement, a particle with a larger amplitude will have a greater proportion of its energy in the form of potential energy, while a particle with a smaller amplitude will have a greater proportion of its energy in the form of kinetic energy.

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Okay, here are the steps to solve this problem:

1) The seesaw is balanced when the sum of moments is 0.

2) The moment created by a force depends on the force and the perpendicular distance from the pivot point.

3) The 20 kg child sits 1 meter from the pivot. So its moment is 20 * 1 = 20 kg*m.

4) We want to find the distance for the 40 kg child to create a moment that balances the 20 kg child's moment.

5) So the moment of the 40 kg child must be 20 kg*m.

6) The moment depends on force and distance. We know the force is 40 kg.

7) So we set: 40 kg * distance = 20 kg*m

8) And solve for the distance: distance = 20 / 40 = 0.5 meters

Therefore, for the seesaw to balance with a 20 kg child 1 meter from the pivot and a 40 kg child on the other side, the 40 kg child should sit 0.5 meters from the pivot point.

Let me know if you have any other questions!

Answer:

25 miles per hour

Explanation:

It was 20 miles per hour the next day.  We don't have enough information to calculate the average speed for the whole trip.

Answer:

pretty sure its B if it isnt im so so sorry

Explanation:

Endarterectomy is used to reduce the risk of stroke and correct the stenosis in the artery.

The primary blood vessels that supply the brain with blood and oxygen are the carotid arteries.

The narrowing of these arteries is referred to as carotid artery disease. Carotid artery stenosis is another name for it. The main factor causing constriction is atherosclerosis.

This fat deposit reduces the blood flow to the brain which cause a stroke.

Carotid endarterectomy is a surgical treatment to remove plaque, an accumulation of fatty deposits that causes a carotid artery to become narrowed.

Hence, an Endarterectomy is used to reduce the risk of stroke, it will correct stenosis in the artery.

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(a) The average speed must you have for the second half of the trip to meet your goal is 8 km/h.

(b) The value obtained (8 km/h) is not reasonable for the second half of the distance since the first half is 48km/h.

Average velocity is defined as the change in position or displacement (∆x) divided by the time intervals (∆t) in which the displacement occurs.

average velocity = total distance / total time

v = (d)/(0.5d/v₁ + 0.5d/v₂)

where;

90 km/h = (d) / (0.5d/48 + 0.5d/v₂)

90(0.5d/48 + 0.5d/v₂) = d

0.9375d + 0.5d/v₂ = d

d(0.9375 + 0.5/v₂) = d

0.9375 + 0.5/v₂ = 1

0.5/v₂ = 0.0625

v₂ = 0.5/0.0625

v₂ = 8 km/h

Thus, the average speed must you have for the second half of the trip to meet your goal is 8 km/h.

The value obtained (8 km/h) is not reasonable for the second half of the distance since the first half is 48km/h.

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Answer:

Change its velocity by 10 m/s in 1s

Explanation:

a. the landing ramp should be placed at 276.298 ft horizontally from the launch point.

(b) the angle of the landing ramp is 30°.

(a)

Launch speed = 55.0 mph * (1.467 ft/s)

= 80.685 ft/s

Horizontal distance = Launch speed * Time of flight

Vertical velocity = Launch speed * sin(30.0°)

Time to reach maximum height = Vertical velocity / g

Vertical distance = (1/2) *g * t²

and Time = √(2 * Vertical distance / g)

Total time of flight = 2 * Time to reach maximum height + Time for descent

Horizontal distance = Launch speed * Total time of flight

The Vertical velocity = 80.685 ft/s * sin(30.0°)

= 40.3425 ft/s

Time to reach maximum height = 40.3425 ft/s / 32.2 ft/s²

Time to reach maximum height  = 1.253 s

Time of descent = √(2 * 25.0 ft / 32.2 ft/s²)

Time of descent  = 0.913 s

Total time of flight = 2 * 1.253 s + 0.913 s

Total time of flight = 3.419 s

In conclusion, the horizontal distance = 80.685 ft/s * 3.419 s

horizontal distance = 276.298 ft

b.

the angle of the landing ramp is  30.0 be the same as the launch angle.

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The electrical force between the two charges can be calculated as +1.8×10⁻² N and its repulsive.

To find the electrical force, distance = 2 meters

charge q1 = 2×10⁻⁶ C

charge q2 = 4×10⁻⁶ C

         The force of attraction or repulsion acting along a straight line between two electric charges is directly proportional to the product of the charges and inversely to the square of the distance between them.

Formula can be written as,

          F = K ( q1q2 / r² )

F - electric force

k - Coulomb constant

q1, q2 - charges

r - distance of separation

Substituting the values in the formula,

         F = 9 × 10⁹ Nm²/C² ( (2×10⁻⁶ C ×  4×10⁻⁶ C) / (2²))

            = 0.0179751

         F = 1.8 × 10 ⁻² N.

As both the charges q1 and q2 are positive, the charges gets repulsive.

SO, the correct answer is Option A.

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One similarity is the use of physical body whereas one difference is that one is exercise and the other is a sport.

One similarity between a set and a bump in volleyball is the movement and use of legs and hands.

Whereas one difference between a set and a bump in volleyball is that completing several reps of a particular exercise in a row is called a set while on the other hand,  the basic pass in volleyball is known as bump.

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Answer:

A

Explanation:

Answer: B

Explanation: I got it right

The magnitude of the electrostatic repulsive force between the larger charge and the smaller charge is 101.25 μN, and the total electric field between Q₁ and Q₂ is  1.3 × 10⁶. directed towards Q₂.

The electrostatic force is the force of attraction or repulsion between two charged particles, which is caused by the interaction of their electric fields. It is proportional to the magnitude of the charges and inversely proportional to the distance between them and is described by Coulomb's law.

(a) The electrostatic force between two point charges is given by Coulomb's law:

F =  k ×  ( q₁  × q₂) / r²

where

F is the magnitude of the force,

k is Coulomb's constant  (k  = 9.0 × 1 0⁹ N  m² / C²),

q₁ and q₂ are the charges of the two particles, and r is the distance between them.

In this case,

q₁ = +15 nC =  +15  ×  10⁻⁹ C

and

q₂ = +3.0nC = +3.0 × 10⁻⁹ C,

and

r = 40 cm = 0.4 m.

Substituting these values into Coulomb's law, we get:

F = (9.0 × 10⁹)  ×  [(+15 × 10⁻⁹) ×  (+3.0 × 10⁻⁹)]  /  (0.4)²

F ≈  101.25 × 10⁻⁶ N

Therefore, the magnitude of the electrostatic repulsive force between the larger charge and the smaller charge is approximately    101.25  μN.

(b)

The electric field due to each charge at the given point is given by Coulomb's law:

E = k × (q / r²)

where

E is the magnitude of the electric field

k is Coulomb's constant  ( k = 9.0 × 10₉ N m² / C²),

q is the charge, and r is the distance between the charge and the point of interest.

For Q₃,

q = +3.0nC = +3.0 × 10⁻⁹ C,

and

r = 10 cm = 0.1 m.

Substituting these values into Coulomb's law, we get:

E₃ = (9.0 × 10⁹) ×  [(+3.0 × 10⁻⁹) / (0.1)²]

E₃ ≈ 2.7 × 10⁶ N/C      (directed towards Q₃)

For Q₂,

q = -4.0nC = -4.0 × 10⁻⁹ C,

and

r = 30 cm = 0.3 m.

Substituting these values into Coulomb's law, we get:

E₂ = (9.0 × 10⁹) * [(-4.0 × 10⁻⁹) / (0.3)²]

E₂ ≈ -4.0 × 10⁶ N/C   (directed towards Q₂)

The total electric field at the point of interest is the vector sum of the electric fields due to each charge:

Etotal = E₃ + E₂

Etotal ≈ -1.3 × 10⁶ N/C

So, the total electric field at the point that is  10 cm from  Q₃  and  30 cm from Q₂ and lies between  Q₁ and  Q₂ is approximately  1.3 × 10⁶ N/C, directed towards  Q₂.

Therefore, The magnitude of the electrostatic repulsive force between the larger charge and the smaller charge is  101.25 μN, and the total electric field between Q₁ and Q₂ is  1.3 × 10⁶. directed towards Q₂.

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Answer:

A. Memory chips are sturdy.

C. It is usually possible to recover data from a memory chip even when the device containing it is broken.

Explanation:

Digital storage of data refers to the process which typically involves saving computer files or documents on magnetic storage devices usually having flash memory. Some examples of digital storage devices are hard drives, memory stick or cards, optical discs, cloud storage, etc.

A reliable storage ensures that computer files or documents are easily accessible and could be retrieved in the event of a loss.

The two statements which help explain why digital storage of data is so reliable are;

A. Memory chips are sturdy: they are designed in such a way that they are compact and firm.

C. It is usually possible to recover data from a memory chip even when the device containing it is broken.

Answer:

A and C

Explanation:

got it right on a p e x

The serve, forehand groundstroke, backhand groundstroke, forehand volley, backhand volley, and overhead smash are the six basic strokes in tennis. The 6 basic "strokes" are the basic actions a tennis player makes to hit the ball.

Stay safe & humble <3

To calculate the electric force between two charges, we can use Coulomb's law:

F = k * |q1 * q2| / r^2

where F is the electric force, k is the electrostatic constant (k ≈ 8.99 × 10^9 N m^2/C^2), q1 and q2 are the magnitudes of the charges, and r is the distance between the charges.

In this case, q1 = 0.0042 C, q2 = -0.0050 C, and r = 0.0030 m.

Substituting these values into the equation:

F = (8.99 × 10^9 N m^2/C^2) * |0.0042 C * (-0.0050 C)| / (0.0030 m)^2

F = (8.99 × 10^9 N m^2/C^2) * 0.000021 C^2 / 0.000009 m^2

F ≈ 1977.78 N

Therefore, the electric force between the two charges is approximately 1977.78 Newtons.

Answer:

Is it suppose to be a question

Explanation:

Answer:

5 m/s2

Explanation:

Acceleration = Change in velocity/ time

Or

a= v2 - v1/ t

a = 20- 0 /4

a = 20÷ 4

a= 5meters per seconds square

The factor that leads to loess deposit is when the wind carries fine sediment. That is option C.

The loess deposits are those deposits that are usually found at the edge of deserts.

The major factor that causes the formation of loess is the wind because they are entrained, transported, and deposited by the wind.

The fine particles carried by wind contains find grained sediments, organic particles that are capable of forming loess.

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Answer:

Density=10.50kg/m³

Explanation:

\(Solution,\\Height(h)=0.5m\\Radius(r)=0.4m\\Now, \\Volume=\pi r^{2} h\\\\Volume=\pi *(0.4m)^{2} *0.5m\\\\Volume=0.251327m^{3} \\\\Again,\\\\Density=\frac{mass}{volume} \\\\Density=\frac{2.640kg}{0.251327} \\\\Density=10.50kg/m^{3}\)

The density of the cylindrical rod is 10.516 kg/m³.

To calculate the density of the cylindrical rod, we can use the formula:

\(\rm \[\text{{Density}} = \frac{{\text{{Mass}}}}{{\text{{Volume}}}}\]\)

The mass of the rod is given as 2.640 kg. To find the volume, we can use the formula for the volume of a cylinder:

\(\rm \[\text{{Volume}} = \pi \times \text{{radius}}^2 \times \text{{height}}\]\)

Substituting the given values:

\(\[\text{{Volume}} = \pi \times (0.4 \, \text{{m}})^2 \times 0.5 \, \text{{m}}\]\)

Calculating the volume:

\(\[\text{{Volume}} = \pi \times 0.16 \, \text{{m}}^2 \times 0.5 \, \text{{m}}\]\\\\text{{Volume}} = 0.251 \, \text{{m}}^3\]\)

Now we can substitute the mass and volume values into the density formula:

\(\[\text{{Density}} = \frac{{2.640 \, \text{{kg}}}}{{0.251 \, \text{{m}}^3}}\]\)

Calculating the density:

\(\[\text{{Density}} = 10.516 \, \text{{kg/m}}^3\]\)

Therefore, the density of the cylindrical rod is 10.516 kg/m³.

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Answer:

I = 1.38 A

Explanation:

Given that,

Charge, q = 5000 C

Time, t = 1 hour = 3600 s

We need to find the current intensity. The current intensity is equal to the electric charge per unit time. It can be given by :

\(I=\dfrac{q}{t}\)

Substitute all the values in the above formula

\(I=\dfrac{5000\ C}{3600\ s}\\\\=1.38\ A\)

So, the current intensity is 1.38 A.

Answer:

920000

Explanation:

Each kg contains 1,000 grams

The length of the lake is 839.1 ft, if the height of the hot-air balloon is 500 ft.

Angle of depression of the farthest end, θ₁ = 25°

Angle of depression of the nearest end, θ₂ = 65°

Height of the balloon, h = 500 ft

The distance between the bottom of the balloon and the farthest end of the lake, x = 500/tan25 = 1072.25 ft

The distance between the bottom of the balloon and the nearest end of the lake, y = 500/tan65 = 233.2 ft

The length of the lake, l = 1072.25 - 233.2 = 839.1 ft

--The given question is incomplete, the complete question is:

"From a stationary hot-air balloon 500ft above the ground, two sightings of a lake are made. One at the farthest end of the lake at an angle of depression of 25 degrees and another at the nearest end of the lake at an angle of depression of 65 degrees. How long is the lake?"--

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The potential difference across the parallel plate capacitor is 2.26 millivolts

The capacitance of the parallel plate capacitor is given by C = ε₀A/d where

Also, the surface charge on the capacitor Q = σA where

The potential difference across the parallel plate capacitor is V = Q/C

= σA ÷ ε₀A/d

= σd/ε₀

Substituting the values of the variables into the equation, we have

V = σd/ε₀

V = 5.0 × 10⁻¹² C/m² × 4.0 × 10⁻³ m/8.854 × 10⁻¹² F/m

V = 20.0 C/m × 10⁻³/8.854 F/m

V = 2.26 × 10⁻³ Volts

V = 2.26 millivolts

So, the potential difference across the parallel plate capacitor is 2.26 millivolts

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The velocity of the car is 5.5 m/s. Then the centripetal acceleration of the car will be 0.6 m/s².

Acceleration is a physical quantity measuring the rate of change in velocity. It has both magnitude and direction.

Centripetal acceleration is the acceleration of an  object moving through a circular path. Thus its measures the rate of change in velocity of the body moving in the curvature path.

The centripetal acceleration = V²/R.

Where R is the radius of the curvature path.

The car moves 50 m in 9 seconds. Its velocity is 50/9 = 5.5 m/s.

Thus, centripetal acceleration = (5.5 × 5.5) m/s/ 50 m = 0.6 m/s².

Therefore, the centripetal acceleration of the car moving at a speed of 9 m/s through curvature path is 0.6 m/s².

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The most likely  effect on species is D, The shrimp population will increase which will cause an increase in the squid population.

If the number of phytoplankton in the ecosystem doubles due to an increase in dissolved nutrients, this will likely have a cascading effect on the other species in the food web. Phytoplankton are the primary producers in the ecosystem and serve as a food source for many other species.

If the number of phytoplankton doubles, it is possible that the shrimp population will increase, as they will have more food to eat. This may in turn lead to an increase in the squid population, since squid are a primary food source for shrimp.

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The complete question:

Fertilizer runoff causes an increase in the dissolved nutrients of the ecosystem shown in the food web below. This causes the number of phytoplankton to double.

How will this most likely affect the other species in this ecosystem?

A. The shrimp population will decrease which will cause an increase in the squid population.

B. The shrimp population will decrease which will cause an increase in the sperm whale population.

C. The shrimp population will increase which will cause a decrease in the sperm whale population.

D. The shrimp population will increase which will cause an increase in the squid population.

When the two spheres are brought into contact, their charges are redistributed such that they become evenly distributed across the two spheres. after they are separated, each sphere will carry a charge of 15.3 μC.

1. Hollow metal sphere 1 carries a charge of 3.70 μC.
2. Identical hollow metal sphere 2 carries a charge of 26.9 μC.
When the two spheres are brought into contact, they will share their charges until they reach an equilibrium. Since the spheres are identical, they will equally distribute the total charge between them.
Step 1: Calculate the total charge.
Total charge = Charge on sphere 1 + Charge on sphere 2
Total charge = 3.70 μC + 26.9 μC
Total charge = 30.6 μC
Step 2: Distribute the total charge equally between the two spheres.
Charge on each sphere = Total charge / 2
Charge on each sphere = 30.6 μC / 2
Charge on each sphere = 15.3 μC
After the two spheres are brought into contact and then separated, each sphere will carry a charge of 15.3 μC.

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