Alice boards a spaceship that is headed towards Betelgeuse, a red giant star in the constellation Orion, with a speed of 0.5c After a year Betty, Alice’s twin sister, decides to board a second spaceship that is also headed to Betelgeuse. Betty’s spaceship travels with a speed of 0.9c
i) When Betty catches up with Alice what is the difference in their age.
ii) Who is older ?

Answers

Answer 1

When Betty catches up with Alice, Betty will be younger than Alice by Δt = 0.87 - 0.44 = 0.43 years.
ii) Alice is older than Betty when they meet.


According to the theory of relativity, time dilation occurs when an object moves at high speeds. Therefore, Alice's time will slow down due to her spaceship's high speed of 0.5c, while Betty's time will slow down even more due to her spaceship's higher speed of 0.9c.
i) When Betty catches up with Alice, Betty's clock will have ticked less than Alice's clock. The time difference can be calculated using the equation:
Δt = γΔt₀, where Δt₀ is the time difference measured by a stationary observer, and γ is the Lorentz factor given by γ = 1/√(1 - v²/c²), where v is the relative speed between the two spaceships, and c is the speed of light.
Assuming Alice and Betty are both 20 years old when they leave Earth, and using the Lorentz factor equation, we get:
- Δt for Alice = γΔt₀ = √(1 - 0.5²)/0.866 x 1 year = 0.87 years
- Δt for Betty = γΔt₀ = √(1 - 0.9²)/0.436 x 1 year = 0.44 years
Therefore, when Betty catches up with Alice, Betty will be younger than Alice by Δt = 0.87 - 0.44 = 0.43 years.
ii) Alice is older than Betty when they meet.

To know more about theory of relativity visit:

https://brainly.com/question/31293268

#SPJ11


Related Questions

Ana kicks a stationary 0.2kg soccer ball. The ball leaves her foot at a speed of 20 m/s.
A.What impulse was delivered to the ball?
B. The ball experience 40N of force during the kick. How long were the ball and foot in contact?

Answers

Answer:a. 24 kg m/s

b.  3/5s

Explanation:

a.impulse is the change in momentum so at first the momentum is zero because the ball was at rest and the final momentum is 1.2kg*20m/s=24 kg m/s

so the impulse would be (24-0) kg m/s=24 kg m/s

b. so the impulse equation is impulse is force *delts time

so 24 kg m/s=40N*t

t=24 kg m/s /40N=3/5 s

9. When we see the color of an object it absorbs all of the light colors except? _________________
The color it reflects The color it absorbs White light

Answers

it absorbs all ligj colour except black

An atom y has 11 eleven protons 12 neutrons what is the number of electrons in it

Answers

Answer:

Electrons = 11

Explanation:

The amount of protons is = to the amount of electrons

If you use a hair dryer, what type of electrical transformation is this?
{blank] energy to [blank] energy

Answers

Answer:

I think it electrical energy to kinetic energy

]A net force of 15 N is applied to a cart with a mass of 2.1 kg.How long will it take the cart to travel 2.8 m, starting from rest? Acceleration=7.14m/s²

Answers

we will use one of the kinematic equations :

d = u*t+0.5*a*t²

in which : d : distance

u : initial velocity

a : acceleration

t : time

after substitution :

initial velocity = 0 m/s (from rest)

2.8 = 0*t+0.5*7.14*t²

2.8 = 3.57*t²

t² = 0.7843

after square root

t = 0.885615 s

I hope this answer will help

What does it mean when the
compressions of a longitudinal
wave are far apart?
A. the amplitude is higher
B. the wavelength is longer
C. the wavelength is shorter
D. the amplitude is shorter

Answers

Answer:

it will option B,hope it helps

C. The wavelength is longer.

What is longitudinal wave?

A sound wave is called a longitudinal wave because compressions and rarefactions in the air produce it.

The air particles vibrate parallel to the direction of propagation.

A longitudinal wave consists of a repeating pattern of compressions and rarefactions.

Thus, the wavelength is commonly measured as the distance from one compression to the next adjacent compression or the distance from one rarefaction to the next adjacent rarefaction.

Longitudinal waves move through a medium from the point of the disturbance in the form of compressions (where particles of the medium are bunched together) followed by rarefactions (where particles of the medium are farther apart).

In longitudinal waves, the distance from one compression to the next is the wavelength.

Therefore,

In longitudinal wave the wavelength is longer.

Learn more about Longitudinal wave here:

https://brainly.com/question/2463407

#SPJ2

Why does mercury have the least gravitational pull?

Answers

Since Mercury has less mass than Earth, the surface gravity on Mercury is less than the surface gravity on Earth. The surface gravity on Mercury is only about 38% of the surface gravity on Earth, so if you weigh 100 pounds on Earth, you would weigh only 38 pounds on Mercury. Yo

Problem 1. A 70-kg person standing on a frictionless platform of ice throws a football
forward with a velocity of 12m/s. If the person moves backward (sliding) with a velocity of
34cm/s, what is the mass of the football?

Problem 2. A car traveling at 8m/s crashes into a car of identical mass stopped at a traffic
light. What is the velocity of the wreckage immediately after the crash, assuming that the
cars stick together?
Problem 3. A 30-kg child stands on a frictionless surface. Th father throws a 0.8-kg football
with a velocity of 15m/s. What velocity will the child have after catching the football?

Problem 4. A billiard ball moving to the left at 30 cm/s collides head with another ball
moving to the right at 20cm/s. The masses of the balls are identical. If the collision is
perfectly elastic, what is the velocity of the first ball after impact if velocity of the second
ball is 4cm/s toward the right?

Problem 5. Two metal balls A and B are suspended, as shown in the figure, so that each
touches the other. The masses are given in the figure. Ball A is pulled to the initial side until it
is 12 cm above its initial position, and then it is released. If it strikes ball B in a completely
elastic collision, find the height h reached by ball B assuming zero friction.

Answers

Answer: The answer is in your heart

Explanation: I don't know, just trust °_°

It depends on the location on the periodic table and if it is easier to loose are gain electrons to fill the valence electron shell.

What is the electron affinity?

The electron affinity of the neutral atom of the element can show indicate whether or not the element is going the make positive or negative ions.  The higher the electron affinity is, the more the neutral atom wants to gain electrons.

The electron affinity for alkali metals and alkaline earth metals are low due to the fact that they are located on the left of the periodic table and only needs to loose 1 or 2 electrons to have a completed valence shell.

That means that they want to form cations (loose electrons).  Halogens have a high electron affinity since they are located on the right of the periodic table and only have to gain 1 electron to get a completed valence electron configuration.  That means that it forms anions.

Therefore, It depends on the location on the periodic table and if it is easier to loose are gain electrons to fill the valence electron shell.

Learn more about periodic table on:

https://brainly.com/question/11155928

#SPJ2

2.2 State the dependent variable.

Answers

Answer:

The dependent variable is the variable being tested and measured in an experiment, and is 'dependent' on the independent variable. An example of a dependent variable is depression symptoms, which depends on the independent variable

Explanation:

I HOPE FOR A GOOD RESPONSE

HAVE A NICE DAY

Two charged particles held close together are released. As they move, the force on each particle increases. Therefore, the particles have _________.

Question 3 options:
A. Opposite Charges
B. Like Charges
C. No Charge

Answers

The two charged particles will have Opposite charge.

What is coulomb's law?

According to Coulomb's law: The magnitude of each of the electric forces with which two point-at-rest charges interact is directly proportional to the product of the magnitude of both charges

And inversely proportional to the square of the distance that separates them and has the direction of the line that joins them.

The formula will be given as:

[tex]F=\dfrac{kq_1q_2}{r^2}[/tex]

If the two charges have the same sign, the electrostatic force between them is repulsive; if they have different signs, the force between them is attractive.

Hence the two charged particles will have Opposite charge.

To know more about the coulomb's law, follow

https://brainly.com/question/66110

please help me on this physics, i got confused​

Answers

Explanation:

this is the answer for your question

Which two charges of a magnet will attract?

Answers

Answer:

The other end is called the south pole. When two magnets are brought together, the opposite poles will attract one another, but the like poles will repel one another. This is similar to electric charges.

Explanation:

Answer: A magnet has two ends called poles the answer are the poles

North pole and South pole

Explanation:

plz mark brainliest

Balance the equation​

Answers

Answer:

2K + CI2 (arrow) = 2KCI

Explanation:

ZZZZZZZZZ

how much must a woman weigh ( force) if the pressure she exerts while standing on one foot has an area of 0.6m squared exerts a pressure of 16 Pa

Answers

Answer:

W = 9.6 N

Explanation:

Given that,

Area on 1 foot, A = 0.6 m²

Pressure, P = 16 Pa

The pressure is given by force acting per unit area. So,

[tex]P=\dfrac{F}{A}\\\\P=\dfrac{W}{A}\\\\W=16\times 0.6\\\\W=9.6\ N[/tex]

So, the required weight is 9.6 N.

Ana kicks a stationary 0.2 kg soccer ball. The ball leaves her foot at a speed of 20 m/s.
a. What impulse was delivered to the ball?
b. The ball experiences 40N of force during the kick. How long were the ball and
foot in contact?

Answers

Answer:

a. 24 kg m/s

b.  3/5s

Explanation:

a.impulse is the change in momentum so at first the momentum is zero because the ball was at rest and the final momentum is 1.2kg*20m/s=24 kg m/s

so the impulse would be (24-0) kg m/s=24 kg m/s

b. so the impulse equation is impulse is force *delts time

so 24 kg m/s=40N*t

t=24 kg m/s /40N=3/5 s

What is the relationship with gravity and distance?
a. As distance increase - gravity increase
b. As distance decrease - gravity decrease
c. As distance increase - gravity decrease

Answers

Answer:

a

Explanation:

If the distance increase, the gravity increase

What is transmission of sound?​

Answers

Sound is transmitted through gases, plasma or blood, and liquids as longitudinal waves, also called compression waves. It requires a medium to propagate. Through solids, however, it can be transmitted as both longitudinal waves and transverse waves.

For example, when you flick the rim of a glass, the glass will vibrate imperceptibly. These vibrations move through the air and strike the ear drum of anyone within hearing range (click here to find out 'How Our Ears Hear'). In fact, these vibrations, or sound waves, can move through any medium: gas, liquid or solid.

(PLEASE mark as brianliest!)

A vehicle starts to move from the rest gets an acceleration of 5 m/s2 within 2
seconds. Calculate the velocity and distance covered by the vehicle within the given time.

Answers

Answer:

I. Final velocity, V = 10m/s.

II. Distance, S = 10m.

Explanation:

Given the following data:

Acceleration = 5m/s²

Time = 2 seconds

Since the vehicle starts from rest, initial velocity = 0m/s

To find the final velocity, we would use the first equation of motion.

V = U + at

Substituting into the equation, we have

V = 0 + 5*2

V = 0 + 10

V = 10m/s.

Now, to find the distance covered, we would use the second equation of motion.

S = ut + ½at²

S = 0*2 + ½*5*2²

S = ½*5*4

S = 20/2

S = 10m

Lithium (Li) has a charge of +1, and oxygen (O) has a charge of –2. Which is the chemical formula? LiO2 LiO Li2O Li2O2

Answers

Answer:

The results is                  Li₂O

Explanation:

n a chemical reaction, the electron miner in the formula must be balanced, that is, the number of positive and negative charges is the same

In this case, oxygen has a valence of -2 that is, it can give two electrons and lithium has a valence of +1, therefore two lithium atoms are needed for the charges to be neutral, therefore the chemical formula is

The results is                  Li₂O

Answer:

Li2O

Explanation:

just took the test on edge

A stovetop burner on medium reaches 95°C. Which will also receive a flow of heat directly from the burner? the surrounding air a burner at the same temperature a pan heated to 100°C hotter water inside a pan

Answers

Answer:

Option C, a pan heated to 100°C

Explanation:

The pan on the burner will be in direct contact of the heat released by burner and hence the pan will receive the direct flow of heat from the burner.

However, the water is the pan will be heated by the heat transferred from the pan to the water in it. Water will not receive heat directly from the burner.

Hence, option C is correct

Answer:

C or 3    a pan heated to 100°C

Explanation:

I have proof that it it most likely right with a side of memes.

(95kg)x(-6.549m/s)
I will give you 23 points if you answer this question

Answers

Answer:

-622.155N

Explanation:

I'm not entirely sure what physics you're doing but uh alright.

A force of 450 N moves a body through 300 cm in the direction of force. Calculate the work
done by the force.

Answers

Answer:

150J

Explanation:

Formula : Work done

Force x distance

work done = force x distance

Distance should be measured in meters

300÷100=3m

work done = 450 x 3

=150J

Consider the differences between a horseshoe magnet and a bar magnet. Is the attraction or repulsion going to be stronger or weaker between two horseshoe magnets or two bar magnets, as shown here? How would that influence the density of magnetic field lines?

Answers

Answer and Explanation:

A horseshoe-shaped magnet, that is, a "U" shape, has stronger attraction and repulsion capacities than that presented by a bar-shaped magnet. This is because the lines of the magnetic field on the "U" magnet are more dense and therefore promote a stronger magnetic field. This strong magnetic field exists because in a "U" shaped magnet, the magnetic poles are on the same plane, allowing a better fluctuation of the lines of the magnetic field.

What is Newton's Second Law?


1.The attraction between objects

2.An object at rest tends to stay at rest and an object in motion tends to stay in motion unless acted upon by an unbalanced force

3.An object's acceleration depends on its mass and on the net force acting on it.

4.For every action there is an equal and opposite reaction

Answers

Answer:

An object's acceleration depends on its mass and on the net force acting on it.

Explanation:

Newton's second law states that the acceleration of an object is directly related to the net force and inversely related to its mass. Acceleration of an object depends on two things, force and mass.

Answer:

3.An object's acceleration depends on its mass and on the net force acting on it.

Calculate the impulse on a baseball hit by a bat with a force of 50N during
a time interval of 0.02s.

(with solution)

Answers

Answer:

1

Explanation:

Impulse = change in momentum = force x change in time

50 x 0.02 = 1

If a baseball is hit by a bat with a force of 50N during a time interval of 0.02s. Then the impulse on the baseball is 1 N s.

What is impulse?

An impulse is a quantity that measures the change in momentum of an object. It is defined as the product of force and time, and it is measured in units of Newton seconds (N s) or kilogram meters per second (kg m/s). The impulse experienced by an object is equal to the change in momentum that occurs when a force is applied to it for a specific period of time.

Impulse is practically applied in various areas of physics and engineering. Here are a few examples:

Sports: Impulse is a crucial factor in many sports, especially those that involve hitting or throwing objects. In sports like baseball, cricket, and golf, the force and time of impact determine the ball's momentum and trajectory.

Transportation: The impulse experienced by vehicles during a collision is used to determine the forces that act on the occupants. This information is used to design safety features such as airbags and crumple zones.

Engineering: In mechanical engineering, impulse is used to design machines that can produce large forces over short periods. For example, hydraulic presses use a large force over a short period to shape metal or other materials.

Physics: Impulse is a fundamental concept in physics, particularly in the study of collisions and the conservation of momentum. The impulse-momentum theorem is a fundamental law of mechanics that relates the change in momentum of an object to the impulse applied to it.

Here in the Question,

The impulse on the baseball can be calculated using the formula:

Impulse = Force x Time

Given that the force is 50 N and the time interval is 0.02 s, the impulse can be calculated as follows:

Impulse = 50 N x 0.02 s

Impulse = 1 N s

Therefore, the impulse on the baseball is 1 N s.

To learn more about kinetic energy click:

brainly.com/question/26472013

#SPJ3

what to do if i am kidnapped right now pls help im screaming pls pls pls alot of points

Answers

Answer:

call the police, or scream on the top of ur lungs. and fight for ur life.

Explanation:

Answer:

Try to put your finger prints over EVERYTHING and try to remember EVERY SURROUNDING YOU SEE, try to put strands of your hair all over wherever you are. Try to poison whoever kidnaped you (ik kind of far but STILL). Just please if you actually ARE being kidnapped, SCREAM AND RUN JUST RUN AS FAST AS YOU CAN IF U AREN'T TIED UP OR WHATEVER. :(

Describe how the sound waves are reflected, absorbed, or transmitted through various materials (liquid, solid, gas).

Answers

Answer:

Sound travels more quickly through solids than through liquids and gases because the molecules of a solid are closer together and, therefore, can transmit the vibrations (energy) faster. Sound travels most slowly through gases because the molecules of a gas are farthest apart.

. ___________ The heat and light move from the core into this layer.

Answers

[tex]\huge{ \star \fcolorbox{magenta}{purple}{ \fcolorbox{magenta}{blue}{ \fcolorbox{magenta}{pink}{ \fcolorbox{magenta}{red}{ \sf{photosphere}}}}}} \star[/tex]

Answer:

PHOTOSPHERE

Explanation:

HOPE IT HELPS YOU

Which orbital is the first to fill with electrons in a given principal energy level?

Answers

Answer:

s orbital

Explanation:

that the answer

Which of the following statements is NOT true about chemical reactions?
A. A chemical reaction produces new substances with different properties.
B. Chemical reactions result in products that have characteristics that are not the same as the reactants.
C. During chemical reactions, chemical bonds break and/or new bonds form.
D. When a chemical reaction releases energy, it is an example of an endothermic reaction.

Answers

Answer:

D. When a chemical reaction releases energy, it is an example of an endothermic reaction.

Explanation:

"Endo" means within. Therefore, an endothermic reaction releasing energy makes no sense.

p.s.

I owe you for your help.

Thank you so much!

The statement that is not true about the chemical reaction is when a chemical reaction releases energy, it is an example of an endothermic reaction, therefore the correct answer is option D.

What is a chemical reaction?

A chemical reaction is a process in which one or more substances, also known as reactants are converted to one or more different substances, known as products.

A chemical reaction rearranges the constituent atoms of the reactants to create different substances as products.

Substances with novel characteristics are created through chemical reactions.

Products of chemical reactions differ from the reactants in terms of their features.

Chemical bonds may break or produce new ones during interactions.

The excess energy is released during an exothermic reaction, making the potential energy of the reactant higher than the potential energy of the product. The right response is D.

To learn more about chemical reactions, refer to the link;

brainly.com/question/22817140

#SPJ2

Other Questions
New Orleans is particularly vulnerable to hurricane damage because? its levee walls are made of steel instead of earthen it is a shoreline unlikely to have hurricanes so it has no history of preparing for these storms the Mississippi River will be forced backwards during a storm resulting in additional water O its elevation is below sea level which four countries initially voted against adopting the declaration on the rights of indigenous peoples in 2007? Remove all non-alphabetic charactersWrite a program that removes all non-alphabetic characters from the given input. Assume the input string will not exceed 50 characters.Ex: If the input is:-Hello, 1 world$!the output is:HelloworldThe program must define and call a function named RemoveNonAlpha that takes two strings as parameters: userString and userStringAlphaOnly. userString is the user specified string from the program input. Function RemoveNonAlpha() then assigns userStringAlphaOnly with the user specified string without any non-alphabetic characters. void RemoveNonAlpha(char userString[], char userStringAlphaOnly[]) Scientists can measure the depths of craters on the moon by looking at photos of shadows. The length of the shadow cast by the edge of a crater is about 500 meters. The suns angle of elevation is 55. Estimate the depth of the crater d? Solve the following IVPs using Laplace transform: a. y' + 2y' + y = 0, y(0) = 2, y'(0) = 2. Asap !!!given a scatter plot, what do you need to do to find the line of best fit?a) draw a line that goes through the middle of the data points and follows the trend of the data b) take a wild guessc) start at the origin and draw a line in any directiond) draw a line that only goes through 1 point of the data points Graph of triangle ABC in quadrant 3 with point A at negative 8 comma negative 4. A second polygon A prime B prime C prime in quadrant 4 with point A prime at 4 comma negative 8. 90 clockwise rotation 180 clockwise rotation 180 counterclockwise rotation Determining an organization's objectives and deciding how to accomplish them is a management function known as:A) Near-shoring.B) Staffing.C) Crowdsourcing.D) Planning.E) Factoring. Find the derivative of the function. f(x) = ((2x ? 6)^4) * ((x^2 + x + 1)^5) at 300 kelvin what is the speed of sound though the noble gas krypton. krypton has a molar mass of 83.8 g/mol. show all your calculations. if b a f ( x ) d x = 2 6 f ( x ) d x 7 2 f ( x ) d x 6 4 f ( x ) d x , what are the bounds of integration for the first integral? an individual who is 40 years old with a resting heart rate of 63 would have a calculated maximum heart rate of FILL THE BLANK. ____ prevention attempts to prevent further illegal acts among offenders once such An answering service staffed with one operator takes phone calls from patients for a clinic after hours. Patient phone calls arrive at a rate of 15 per hour. The interarrival time of the arrival process can be approximated with an exponential distribution. Patient phone calls can be processed at a rate of u 25 per hour. The processing time for the patient phone calls can also be approximated with an exponential distribution. Determine the probability that the operator is idle, i.e., no patient call is waiting or being answered. Three discrete spectral lines occur at angles of 10.4, 13.9, and 14.9, respectively, in the first-order spectrum of a diffraction grating spectrometer. (a) If the grating has 3710 slits/cm, what are the wavelengths of the light?1= nm (10.4)2= nm (13.9)3= nm (14.9)(b) At what angles are these lines found in the second-order spectra?= (1)= (2)= (3) Daniel would like to hold more effective team meetings with his team. What are two important factors he should consider?Multiple Choicea. Communicate with his supervisors about the meeting.b. Schedule a location and time to meet.c. Use an agenda and provide pertinent materials in advance.d. Meet with his followers in advance. Which of the following statements best describes the political situation after the Pax Romana?OA. The senate regained political power and ensured that republicanism would survive in theOB. Inexperienced political leaders were in control of Rome leading up to its fall, generals dorOC. Strong emperors were able to ensure political peace, but bad economic policies and naturOD. The emperors were only figureheads during the years leading up to the fall of Rome, and it spower. In an audit, the valuation of year-end accounts payable is most likely addressed by:a. Confirmation.b. Examination of cash disbursements immediately prior to year-end.c. Examination of cash disbursements immediately subsequent to year-end.d. Analytical procedures applied to vouchers payable at year-end. Alicia: Um, let me think. I'm having trouble with my "friends,"too. That's really hard for me, to keep people as friends long-term .find someone who doesn't let me down. I want a "best friend" in imy life, someone I can go to with anything and share everything with So when I meet someone I have something in common with or who wants to hang out with me, I get really excited that this person will be that "best friend" I've been looking for. So I hang out with her all the time and try to iget close, learn her story right away. But it never works out, and then I'm all alone again. Like, one time in high school, there was this girl that I knew was going to be my best friend. We had really been bonding for like a whole week, so I gave her a "best friends" necklace. She just walks away. She started ignoring me, acting like she didn't see me after that. (pauses, then with more intensity) Bit really, really sucks. It hurts so bad when people turn on you, reject you like that ... but it keeps happening to me. [brief pause; suddenly brightening] I'm glad I came to see you. Talking to you is totally going to help - I can tell. The behaviors Alicia exhibits appear to be long-standing and persistent rather than short- term or transient. In light of this information and based on the symptoms you identified, Alicia's disorder likely falls under which personality disorder cluster? To review each personality disorder cluster, select the cluster name. Cluster A: Odd Personality Disorders (Definition) Cluster B: Dramatic Personality Disorders (Definition) Cluster C: Anxious Personality Disorders (Definition) None of these answers is correct. wage differentials occur for all the following reasons except: group of answer choices homogeneous workers. labor market imperfections. noncompeting groups of workers. compensation differences to offset non monetary differences in jobs.