Who was the first african american to travel in space.

The speed with which the train reaches the rock slide is 19.36 m/s

This is defined as the rate of change of velocity which time. It is expressed as

a = (v – u) / t

Where

The initial velocity of the train can be obtained as illustrated below:

–1.6 = (0 – u) / 12.1

Cross multiply

0 – u = –1.6 × 12.1

– u = –19.36

Divide both sides by –1

u = –19.36 / –1

u = 19.36 m/s

Thus, the train uses 19.36 m/s to reach the rock slide

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Because they last for a very long time, they become unstable and then either slip back into to the sun and erupt into space.

Solar flares are abrupt outbursts that are among the most violent phenomena to occur on the Sun's surface.Flares can unleash energies equal than millions of thermonuclear weapons and normally endure for a few minutes.

The moment the filament size starts to diminish as seen in H pictures is when we designate the filaments eruption start time.This study reports 33 eruptive filament episodes, of which 73% are connected with CMEs and 76% with solar flares.

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(a) The budget constraint can be written as: C = wL + V, where C is consumption, w is the real wage, L is leisure, and V is non-labor market income.

(b) With ẞ = 1/2, V = 100, and w = 200, John's optimal supply of labor cannot be determined without information about his preferences for leisure and consumption. The utility function only represents his preferences, but we need additional information to determine the specific amount of labor he would choose to supply.

(c) John's total income is the sum of his labor income and non-labor market income: Total income = Labor income + Non-labor income = wL + V. Without knowing the specific value of L, we cannot calculate the total income.

(d) Similarly, without knowing John's preferences for leisure and consumption, we cannot determine the specific level of consumption he would choose.

(e) In the case where John is subject to a 10% income tax on labor income only, his new optimal supply of labor would depend on the tax rate's impact on his preferences and the trade-off between leisure and consumption. Without further information on his preferences and the specific tax structure, we cannot determine the new optimal supply of labor.

Additional information about John's preferences for leisure and consumption, as well as the specific tax structure, is necessary to calculate his optimal labor supply, total income, consumption, and the impact of the income tax on his labor supply.

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Triangle is a polygon with 3 sides. The record of the letters in your triangle from left to right is EGFBIHDCA.

A triangle is a polygon with 3 sides. Also, It has three vertices.

As the example is given to us, ABCDEFGHI is the record of the letters that are when seen from top to bottom, therefore, if we rotate the triangle such that the left side of the triangle is on the upper side, then the triangle we will get is given below as attached below.

Therefore, the record of the letters in your triangle from left to right will now be "EGFBIHDCA" from the former arrangement which was "ABCDEFGHI".

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A sled travels over the crest of a snow-covered hill. The sled slows down as it climbs up one side of the hill and gains speed as it descends on the other side. Which of the vectors in the figure shows the direction of the sled's acceleration at the crest?The answer is option 3 (O3).

The sled travels over the crest of a snow-covered hill. The sled slows down as it climbs up one side of the hill and gains speed as it descends on the other side. It reaches its maximum height at the crest where its potential energy is the greatest.It begins to slow down as soon as it starts to move up the hill. This is because the sled's kinetic energy is gradually being transformed into gravitational potential energy. The sled stops for a brief moment at the crest when it is at the maximum height. The sled then starts to move down the hill because of gravity.The sled's acceleration at the crest is directed downwards. It is because of the force of gravity that acts on the sled. It's possible that the sled is accelerating as it goes down the hill. The sled's velocity is accelerating in the direction of the acceleration. It is possible to represent this with a vector quantity. The sled's acceleration vector is directed downwards. So, the correct answer is option 3 (O3).

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Answer:

Catapult on the ground: Normal, gravity

Catapult (I'm assuming launching marshmallow): Reaction of Force Applied

Marshmallow: Force Applied

Explanation:

This is the forces that act on a stationary object and a launched object. The catapult may also experience a force friction if your teacher is taking a more practical sense.

The statement that rules of thumb are known as a non-traditional approach to setting standards is false. Rules of thumb are actually a traditional and informal method of making rough estimations or decisions.

Contrary to the statement, rules of thumb are not considered a non-traditional approach to setting standards. In fact, they have been used for centuries as a traditional and informal way to make rough estimations or decisions. Rules of thumb are practical guidelines or principles that are based on experience or common sense rather than precise measurements or formal procedures.

These rules are often used in various fields, such as engineering, construction, finance, and everyday life. They serve as quick and convenient methods to make approximate calculations or judgments when precise data or detailed analysis may not be available or necessary. For example, the "rule of thumb" that suggests spending around 30% of your income on housing expenses is a commonly used guideline in personal finance.

While rules of thumb can be helpful in certain situations, it's important to recognize their limitations. They are not meant to replace rigorous analysis or professional judgment. Depending solely on rules of thumb can lead to inaccuracies or oversimplifications. Therefore, they should be used with caution and in conjunction with more precise methods when necessary.

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Answer:

Glucose diffuse from the blood plasma, across the capillary walls to the tissue fluid, and then to the cell.

Glucose diffuse from the blood plasma, across the capillary walls to the tissue fluid, and then to the cell. The waste product urea diffuse from the cells of the liver to the tissue fluid, and then across the capillary walls into the blood plasma.

I would tell Evelyn that her prediction is based on the assumption of a fair coin, where the probability of getting heads or tails is equal.

In theory, if a coin is fair, flipping it 480 times could result in landing tails up approximately 240 times. However, it's important to understand that each individual coin flip is an independent event, and the outcome of one flip does not affect the outcome of subsequent flips. Therefore, it is not guaranteed that exactly 240 out of 480 coin flips will land tails up. There is a probability associated with each outcome, and the actual results may deviate from the expected value. To determine the likelihood of getting close to 240 tails, Evelyn could analyze the probability distribution associated with flipping a fair coin, such as using binomial probability calculations.

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Answer:

Newton's first law of motion states that objects state of rest or uniform motion will stay unless acted upon by an external force

Explanation:

Newton's first law of motion is also called the Law of Inertia. Because, it describes the property of inertia of the body. Newton's First Law states that every object continues its state of rest or uniform motion, until or unless it is acted upon by an external force. It means that if an object is in state of rest, it will remain at rest until or unless an external force is not applied to it. Same goes for the state of uniform motion. Hence, the answer will be:

Newton's first law of motion states that objects state of rest or uniform motion will stay unless acted upon by an external force

Answer: Newton's first law of motion states that objects at rest or in motion will stay unless acted upon by a net external force.

Explanation:

Motion is typically described in terms of velocity, acceleration, displacement and time. An object's velocity cannot change unless it is acted upon by a force, as described by Newton's first law also known as inertia. More generally, the term motion signifies any spatial and or temporal change in a physical system.

Many scientists have studied motion and it's properties because of its importance to life. The Italian, Galileo Galile, who lived from 1564 to 1642, did the first systematic study of motion. Also Sir Issac Newton did more detailed work on the study of motion. In his works in motion he came about three different laws.

- Newton's first law: This states that objects at rest or in motion will stay unless acted upon by a net external force.

-- Newton's second law: This states that the force on an object is equal to its mass times its acceleration.

- Newton's third law: This states that for every action there is an equal and opposite reaction.

We know the power of the laser beam, so we know the energy per second that it delivers. The wavelength of the light tells us the energy of every photon, so we can use that to calculate the number of photons delivered per second

The energy of each photon is E = hf= hc/A (1.99 x 1025 J.m)/X.

The power is the total energy per second and the total energy Et is the number of photons N

times the energy E of each photon. A = 10.6 x 10 m, so E = (1.99 x 1025 J.m)/(10.6 x 10 m) = 1.88 x 1020 J

N/t=P/E = (0.100 x 103 W)/(1.88 x 10-20 J) = 5.32 x 1021 photons/s

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Answer:

The mass of the apple is 0.49kg

Explanation:

Potential energy=mgh

P=mgh

6=m×1.22×10

6=12.2m

divide both sides by 12.2

m=6/12.2

m=0.49kg

The statement that is not true is option D, which states that the horizontally-released ball has a greater speed than the other ball for the whole trip.

In fact, both baseballs have the same vertical acceleration due to gravity, and therefore they both have the same vertical component of velocity as they reach impact, which is determined solely by the height from which they were dropped.

While in the air, the horizontal component of velocity of the horizontally-released ball remains constant, as there is no force acting on it in the horizontal direction. On the other hand, the horizontal component of velocity of the dropped ball increases at the same rate as the vertical component of velocity, due to the acceleration of gravity.

Both baseballs hit the ground at the same time because they have the same vertical acceleration and started falling from the same height.

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you can eat burrito with hot taco and if school like?

The atomic polarizability of such an atom is 1.11 x 10⁻⁴⁰ Cm²/V.

The electric field of the electron cloud can be found by taking the gradient of the charge density function:

E(r) = -∇p(r) = 8.44q/a³ * r

For getting the atomic polarizability, we need to calculate the change in dipole moment induced in the atom when it is placed in an external electric field. This change in dipole moment is proportional to the electric field and the polarizability of the atom.

Δp = αE

Where

Δp = change in dipole moment,

E = external electric field, and

α = atomic polarizability.

We can approximate the electric field as being uniform over the size of the atom, so we can calculate the electric field at the center of the atom:

E = 8.44q/a³ * a/2 ⇒ 4.22q/a²

The change in dipole moment is given by the change in the electron cloud distribution induced by the external electric field. We can approximate this change as being proportional to the square of the electric field:

Δp = βE²

where β is a proportionality constant.

We can now equate the two expressions for Δp and solve for α:

Δp = βE²

βE² = αE

α = βE

Substituting in the expressions for E and Δp, we get:

α = β(4.22q/a²)²

We can now solve for β by using the known value of the polarizability of a hydrogen atom:

α = 4πε0a³

Substituting this into the previous equation and solving for β, we get:

β = α / (4.22q/a²)²

Substituting the given values and solving for β, we get:

β = (4πε0a³) / (4.22² * q²)

Numerically, this gives:

β = 2.63 x 10⁻⁴¹ Cm²/V²

Therefore, the atomic polarizability of a hydrogen atom in the ground state is:

α = βE = 1.11 x 10⁻⁴⁰ Cm²/V

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The law of physics that this scenario would violate is the law of conservation of energy.

The law of conservation of energy states that energy possessed by an object or physical body can neither be created nor destroyed but can only be transformed from one form to another.

This ultimately implies that, the energy possessed by the rock at the beginning must be equal to the energy possessed by the rock at the end in accordance with the law of conservation of energy.

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The velocity of sound in air is 50 m/s.

To calculate the velocity of sound in air, we can use the formula:

v = f * λ

Where:

v is the velocity of sound

f is the frequency of the sound wave

λ is the wavelength of the sound wave

In this case, the first resonance occurs when the length of the glass tube is a quarter of the wavelength. So, for the first resonance:

λ₁ = 4 * L₁

Where:

λ₁ is the wavelength at the first resonance

L₁ is the length of the tube

Given that L₁ = 30 cm, we can calculate the wavelength at the first resonance:

λ₁ = 4 * 30 cm = 120 cm

Now, when the water level is 25 cm below the open end, the effective length of the tube becomes L₂ = L₁ - 25 cm = 5 cm.

To find the wavelength at the next resonance, we can use the formula:

λ₂ = 4 * L₂

λ₂ = 4 * 5 cm = 20 cm

Since the frequency remains the same (250 Hz), we can now calculate the velocity of sound using the equation v = f * λ:

v = 250 Hz * 20 cm = 5000 cm/s = 50 m/s

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Answer:

Given that

speed u=4*10^6 m/s

electric field E=4*10^3 N/c

distance b/w the plates d=2 cm

basing on the concept of the electrostatices

now we find the acceleration b/w the plates  to find the horizontal distance traveled by the electron when it hits the plate.

acceleration a=qE/m=\(1.6*10^{-19}*4*10^3/9.1*10^{-31} =0.7*10^{15}\)=\(7*10^{14}\) m/s

now we find the horizontal distance traveled by electrons hit the plates

horizontal distance

\(X=u[2y/a]^{1/2}\)

=\(4*10^6[2*2*10^{-2}/7*10^{14}]^{1/2}\)

=\(3*10^{-2}\)= 3 cm

M = mass of the ball A = 5.0 kg

m = mass of the ball B = ?

V = initial velocity of the ball A before collision = 20 m/s

v = initial velocity of the ball B  before collision = 10 m/s

V' = final velocity of the ball A after collision = 10 m/s

v' = final velocity of the ball B after collision = 15 m/s

using conservation of momentum

M V + m v = M V' + m v'

(5.0) (20) + m (10) = (5.0) (10) + m (15)

100 + 10 m= 50 + 15 m

5 m = 50

m= 10 m/s

Answer: 5

Explanation:

Answer:

A magnetic force can convert kinetic energy stored in a magnetic field to potential energy. Kinetic energy can convert potential energy stored in a gravitational field. A magnetic energy can convert potential energy stored in a gravitational field to kinetic energy.

It would take 1.556 seconds for the barrier to crumple and safely slow down the person with a force of 1180 N.

To calculate the time required to crumple the barrier and safely slow down the person, we can use the concept of impulse.

The impulse, denoted by J, is defined as the product of force and time, and it represents the change in momentum of an object. In this case, the impulse required to safely slow down the person can be calculated using the maximum force and the person's initial momentum.

The momentum of a person is given by the product of their mass and velocity:

Momentum = mass × velocity

Given that the person's mass is 68 kg and their velocity is 27 m/s, the initial momentum is:

Initial momentum = 68 kg × 27 m/s

To safely slow down the person, the impulse provided by the barrier should be equal to the change in momentum.

Therefore, we have:

Impulse provided by barrier = Final momentum - Initial momentum

Since the person is brought to rest, the final momentum is zero. Thus, we have:

Impulse provided by barrier = -Initial momentum

Now we can express the impulse in terms of force and time:

Impulse provided by barrier = Force × Time

Plugging in the known values, we can solve for time:

-Initial momentum = Force × Time

68 kg × 27 m/s = 1180 N × Time

Simplifying the equation, we find:

Time = (68 kg × 27 m/s) / 1180 N

Evaluating the expression:

Time = 1836 kg·m/s / 1180 N

Finally, converting kg·m/s to seconds, we get:

Time ≈ 1.5559 seconds

Therefore, it would take approximately 1.556 seconds for the barrier to crumple and safely slow down the person with a force of 1180 N.

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Answer:

5 km

0

Explanation:

The question says the truck travelled to and fro from the stone quarry.

When going to the stone quarry, the distance was 2.5 km to the east.

On returning, the distance back is also 2.5km

Therefore total distance travelled is 2.5km + 2.5km

= 5km

The displacement 8s dependent on what is the initial and also the final position. The initial and the final position are one and the same thing. Because the truck starts and goes back to the same position, the displacement is zero.

Answer:

we expect the reactance of the 33 mH inductor at a frequency of 6 kHz to be approximately 1.24 ohms.

Explanation:

To calculate the reactance (in ohms) of an inductor, we use the formula:

X_L = ω ∙ L

where X_L is the reactance of the inductor in ohms, ω is the angular frequency in radians per second, and L is the inductance in henries.

However, we are given the inductance in millihenries (mH), so we first need to convert it to henries:

L = 33 mH = 33 × 10^-3 H

We are also given the frequency f in kilohertz (kHz), so we can convert it to angular frequency ω using the formula:

ω = 2πf

ω = 2π × 6 kHz = 37.7 krad/s (approx.)

Now we can use the formula to calculate the reactance of the inductor:

X_L = ω ∙ L

X_L = 37.7 k rad/s × 33 × 10^-3 H

X_L = 1.24 Ω (approx.)

Therefore, we expect the reactance of the 33 mH inductor at a frequency of 6 kHz to be approximately 1.24 ohms.

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Answer:

140KG

Explanation:

The correct answer is A) bent toward the normal. When a light ray moves from air into glass, which has a higher index of refraction, its path will be bent toward the normal. This is due to the fact that light travels more slowly in glass than in air and thus is bent at the interface between the two materials.

When a light ray passes from one medium to another, it can be refracted, or bent. This is due to the fact that the speed of light varies depending on the medium it is travelling through. When a light ray moves from a medium with a lower index of refraction, such as air, to a medium with a higher index of refraction, such as glass, its path will be bent toward the normal. This phenomenon is known as refraction, and it is an important part of optics and optical systems.

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A wedge is like a ramp that can work while in motion.

As a tool for raising or lowering a load, an inclined plane, also referred to as a ramp, is a flat supporting surface that is tilted at an angle from the vertical direction with one end higher than the other. One of the six traditional simple machines that Renaissance scientists defined is the inclined plane.

Heavy loads are transported over vertical obstacles using inclined planes. Examples include a ramp used to load cargo into a truck, a pedestrian ascending a ramp, or an automobile or train ascending a grade.

Less force is needed to lift an object up an inclined plane than to lift it straight up, but the distance travelled is greater. Hence, a wedge is like a ramp that can work while in motion.

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Answer:

2n^2

Explanation:

depends on n

if first orboit n = 1

and so on

Answer: particle and neutron

Explanation:

correct me if i’m wrong :)