An alien spaceship traveling at 0.550c toward the Earth launches a landing craft. The landing craft travels in the same direction with a speed of 0.790c relative to the mother ship (as measured by aliens on the mother ship). As measured on the Earth, the spaceship is 0.160 ly from the Earth when the landing craft is launched.
(a) What speed do the Earth-based observers measure for the approaching landing craft?
c
(b) What is the distance to the Earth at the moment of the landing craft's launch as measured by the aliens (mother ship)?
ly
(c) What travel time is required for the landing craft to reach the Earth as measured by the aliens on the mother ship?
yr
(d*) What travel time is required for the landing craft to reach the Earth as measured by Earth-based observers?
yr
(e*) What travel time is required for the landing craft to reach the Earth as measured by those on the landing craft?
yr

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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Graphs can help to demonstrate the qualitative relationship between a set of data by identifying patterns among these data.

Graphs can allow readers to identify a lot of information among a set of data. The most common information to be evaluated through the graphs is the existence of patterns between the data.

For example, a line graph can show the change in a variable over time, allowing readers to see if there is a consistent increase or decrease.

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The change in angular momentum of the pulley-block system is given as \(\omega = Rm_ogt_o\)

Data;

This is the force that makes object rotate about an axis. The formula is given as the product between the radius about the axis and the force acting upon it.

The torque about point o is given as

\(\tau = R * m_og\)

The change in angular momentum about point 'o' is the product between the torque and time.

\(\omega = \tau * t_o\\\omega = Rm_ogt_o\)

The change in angular momentum of the pulley-block system is given as

\(\omega = Rm_ogt_o\)

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Answer:Since pressure = force/area, the same force on a smaller area means more pressure. When you are walking on sand, the force being applied by your body is spread out over the entire surface of your foot. ... So, more pressure applied on a given area of your foot causes more pain.

Explanation:

Good Question

The work required to move the crate vertically at a constant speed of 5.0 m is approximately 7000 Joules (J).

To determine the work required to move the crate vertically, we need to calculate the gravitational potential energy change. The work done is equal to the change in potential energy.

The formula for gravitational potential energy is given by:

Potential energy = mass * acceleration due to gravity * height

In this case, the mass of the crate is not provided, but we can use the given weight of the crate to find the mass. Weight is equal to mass multiplied by the acceleration due to gravity (W = mg).

Given:

Weight of crate (W) = 1400 N

Acceleration due to gravity (g) = 9.8 m/s^2

Vertical distance (height) = 5.0 m

First, calculate the mass of the crate:

1400 N = m * 9.8 m/s^2

m = 1400 N / 9.8 m/s^2 ≈ 143 kg

Now we can calculate the work:

Work = Potential energy = mass * g * height

Work = 143 kg * 9.8 m/s^2 * 5.0 m ≈ 7000 J

Therefore, the work required to move the crate vertically at a constant speed of 5.0 m is approximately 7000 Joules (J).

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Answer: white light

Explanation:

if you mix red and blue light together, you get magenta and when you mix blue and green light together, you get cyan and when you mix red and green light together, you get yellow but when you mix all three primary colors of light together, you end up with white light or as we see it.

Answer:

yes  I feel you-

Explanation:

Answer:

same bro hard times out here

The diffraction pattern narrows with increasing slit width. The interference pattern is produced by the intersection of the two diffraction patterns.

Despite the fact that light waves typically pass close to barriers, where they tend to bend and spread out, light waves do not always move in straight lines as we traditionally believe. Waves spreading as they move through or around an obstruction is referred to as diffraction.

When waves move from one medium to another, the direction they travel in changes, which is known as refraction. A shift in wavelength and speed always occurs with refraction. Waves bend over gaps and obstructions in a process known as diffraction. When the wavelength gets longer, more diffraction occurs.

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A parallel circuit is an electrical circuit with more than one current path and all circuit components are connected between the same two sets of electrically common points. The current supplied by the source in a parallel circuit is equal to the sum of all branch currents in the circuit.

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Answer:

Explanation:

Given:

Q = 90 J

W = 60 J

________

ΔU - ?

1 law of thermodynamics:

Q = ΔU + W

Change in internal energy:

ΔU = Q - W = 90 - 30 = 60 J

The elastic potential energy stored in the stretched spring is 1 J.

Hooke's law states that; provided the elastic limit is not exceeded, the extension of the spring is directly proportional to the force on the spring.

Given that;

Force on the spring = 350 Newton

Distance stretched = 7 centimeters or 0.07 m

Hence;

F = ke

k = F/e = 350 Newton/0.07 m = 5000 N/m

Work done in stretching a spring = 1/2ke^2

= 0.5 × 5000 × (2 × 10^-2)^2 =1 J

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Answer:

12.6

Explanation:

trust me I found the core answer

1. Electrons from the earth are attracted by the region of positive charge on the ball and flow onto the ball, giving it a net negative charge.

2. When the rod is removed, this net charge distributes uniformly over the surface of the ball.

The planet serves as a ground with little promise. Therefore, positive charge flows into the ground when a positively charged conductor is linked to it, and as a result, electrons move from the earth to the conductor.

The sphere receives electrons from the ground until it reaches electrical neutrality. As the sphere fills with electrons from the earth, it becomes negatively charged.

The item will have a balanced charge and become neutral by absorbing electrons from the ground. A positively charged item is grounded by transferring electrons from the earth into it, a process known as grounding. Electrons from the ground are drawn to the object's surplus positive charge.

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Answer:

Resistance in circuit = 0.53 ohm (Approx.)

Explanation:

Given:

Flow of current in circuit = 15 amp

Potential difference = 8 Volts

Find:

Resistance in circuit

Computation:

In an electrical system, resistance is a stopper of a material to electric current.

Resistance in circuit = Potential difference / Flow of current in circuit

Resistance in circuit = 8 / 15

Resistance in circuit = 0.53 ohm (Approx.)

Answer:

Force

Explanation:

Answer:

The mass of the water is greater than the combined mass of the two gases

Answer:

F = −10093.41 N

Explanation:

Given that,

Mass of a baseball, m = 143 g = 0.143 kg

Initial speed of the baseball, u = +38.8 m/s

The hitter's bat is in contact with the ball for 1.20 ms and then travels straight back to the pitcher's mound at a speed of 45.9 m/s, v = -45.9 m/s

We need to find the average force exerted on the ball by the bat. So, Force is given by :

\(F=ma\)

a is acceleration

\(F=\dfrac{m(v-u)}{t}\\\\F=\dfrac{0.143\times (-45.9-(38.8))}{1.2\times 10^{-3}}\\\\F=-10093.41\ N\)

So, the average force exerted on the ball by the bat has a magnitude of 10093.41 N.

No, the potential of a non-uniformly charged sphere cannot be the same as that of a point charge.

The potential of a charged sphere depends on the distribution of charge throughout the sphere, whereas the potential of a point charge depends only on its own charge and the distance from it. A non-uniformly charged sphere has different charges distributed at different distances from a point in space, so the potential at that point will vary depending on the distribution.

In contrast, a point charge has all its charge concentrated at a single point, so the potential at any given distance will be the same regardless of the distribution of charge in the surrounding space. Therefore, the potential of a non-uniformly charged sphere cannot be the same as that of a point charge.

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Time:-

\(\\ \rm\hookrightarrow \dfrac{2.998\times 10^9}{96}\)

\(\\ \rm\hookrightarrow 0.0312\times 10^9\)

\(\\ \rm\hookrightarrow 3.12 \times 10^7hrs\)

The person would have died before reaching Uranus .

Answer:

c = 3.00E8 m/s      speed of light

c = f * λ        frequency ^ wavelength

f = c / λ  = 3.00E8 m/s / .01 m = 3.00E10 / sec

f = 30,000,000,000 /sec

Hello!

We can begin by summing the forces acting on the stone when it is at the bottom of its trajectory.

Refer to the free-body diagram in the image below for clarification.

We have the force of tension (produced by the string) and the force of gravity acting in opposite directions, so:
\(\Sigma F = T - F_g\)

The net force is equivalent to the centripetal force experienced by the stone. Recall the equation for centripetal force for uniform circular motion:
\(F_c = \frac{mv^2}{r}\)

m = mass of object (1.2 kg)
v = velocity of object (? m/s)
r = radius of circle (0.75 m)

The centripetal force is the resultant of the forces of tension and gravity, and points upward (same direction as the tension force) since the tension force is greater.

Therefore:
\(\frac{mv^2}{r} = T - Mg\)

We can solve the equation for 'v':

\(mv^2 = r(T - Mg) \\\\v^2 = \frac{r(T - Mg)}{m}\\\\v = \sqrt{\frac{r(T - Mg)}{m}}\)

Plug in values and solve.

\(v = \sqrt{\frac{(0.75)(40 - 1.2(9.8))}{1.2}} = \boxed{4.201 \frac{m}{s}}\)

Answer:

Work to move unit charge from one plate to the other separated by d

W = E q d

Electric potential: V = W / q

E = V / d = 100 Volts /  .1 m = 1000 Volts / m

F = E q = 1000 Joule / C m * 2 * 10E-4 C

F = .2 J / m = .2 N

The atomic number of an atom can be said to be defined by the number of protons in an element.

An atom can be said to be the part of an element. It defines a particle of matter that uniquely defines an element.

A proton is a stable subatomic particle which contains a positive charge that forms part of the nucleus of an atom. A proton determines the atomic number of an atom.

Therefore, the number of protons in an element determines the atomic number.

ANSWER:

2) Number of protons.

part a) If Q increases by 5 times its original value, the electrostatic force (F) will increase5 times as well.

part b) If r is halved (reduced by 2), the force will become four times stronger (since 2² = 4).

part c) If Q1 is positive and Q2 is negative, the charges will attract each other.

part d) If the force that Q1 exerts on Q2 is 5 times larger than the force that Q2 exerts on Q1 is same.

The electrostatic force is described as the force of attraction or repulsion between two charged particles.

With regards to Coulomb's Law, we have that the electrostatic force between two charges separated by a distance is :

Force = k * (Q1 * Q2) / r²

Where:

F_ =  electrostatic force

k = electrostatic constant

Q1 and Q2 =  magnitudes of the charges

r = distance

for case a:

If one of the charges, Q1 or Q2, increases by 5 times then the electrostatic force  will also increase by 5 times.

case b)

If the distance between the charges, r, is halved, the electrostatic force   will become four times stronger because (1/r²).

for case c.

if Q1 is positive and Q2 is negative, the charges will attract each other because of magnetic laws.

for case d.)

If the force that Q1 exerts on Q2 is 5 times larger than the force that Q2 exerts on Q1 is same as there is a resulting stronger gravitational or electromagnetic force.

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Answer:

Q = 665 J

Explanation:

Given:

m = 500 g = 0.5 kg

T₁ = 250.0 K

T₂ = 240.0 K

c = 133 J / ( kg*⁰K) - Specific heat capacity of platinum

___________

Q - ?

 Heat is released:

Q = c*m*( T₁ - T₂) = 133*0.5*(250.0 - 240.0) =

= 133*0.5*10 ≈ 665 J

The average speed of the car is calculated as 0.43miles/min.

HOW TO CALCULATE AVERAGE SPEED:

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Answer:

true

Explanation:

Answer:

   ω = ω₀ + α t

      ω² = ω₀² + 2 α  θ

      θ = θ₀ + ω₀ t + ½ α t²

Explanation:

Rotational kinematics can be treated as equivalent to linear kinematics, for this change the displacement will change to the angular displacement, the velocity to the angular velocity and the acceleration to the angular relation, that is

     x → θ

     v → ω

     a → α

with these changes the three linear kinematics relations change to

      ω = ω₀ + α t

      ω² = ω₀² + 2 α  θ

      θ = θ₀ + ω₀ t + ½ α t²

where it should be clarified that to use these equations the angles must be measured in radians