Answer:
8 signals received by twin A during the trip.
Explanation:
Given that,
Distance = 12 light year 
Speed = 0.6 c
Time = 1 year
We need to calculate the time by A
Using formula of time

Put the value into the formula


Similarly,
The expression for distance cover by A



We need to calculate the time
Using formula of time



We need to calculate the signals received by twin A
Using formula for number of signals

Put the value into the formula


Hence, 8 signals received by twin A during the trip.
 
        
             
        
        
        
Statements that are true as regards exposure control plan and its updating are;
<em>Updates must have the  reflection of changes in tasks as well in procedures.</em>
<em>Updates must reflect changes in positions that affect occupational exposure.</em>
<em>Updates must have the cost of PPE that is needed and  necessary to reduce exposure</em>
An exposure control plan can be regarded as  the framework for compliance between the employer and the workers.
- This framework give room for the employer to creates a written plan that will help in protecting their workers from bloodborne pathogens. 
- This plan gives hope to workers in term of protection when working with their Employer.
- There are some elements that is associated with  Exposure Control Plan, and theses are;
- Health hazards as well as  risk that is attributed to  each product in the worksite.
- Statement of purpose.
- procedures and practices in a written form
- Responsibilities from the Manager, CEO, designated resources and employer.
Therefore, exposure control plan is avenue to protect workers from bloodborne pathogens. 
brainly.com/question/1203927?referrer=searchResults
 
        
             
        
        
        
thanks again and have to go to the store and get some rest I will be there at puno my phone is not working and I have a few questions about the week and I have a few questions about the week and I have a few questions about the week and I have a few questions about the week and I have a few questions about the week and I have a few questions about the week and I have a few questions about the week and I have a few questions about the week and I have a few questions about the week and I have a few questions about you
 
        
             
        
        
        
Answer:
The wavelength of the light is  .
.
Explanation:
Given that,
Distance between the slit centers d= 1.2 mm
Distance between constructive fringes 
Distance between fringe and screen D= 5 m
We need to calculate the wavelength 
Using formula of width

Put the value into the formula




Hence, The wavelength of the light is  .
.
 
        
             
        
        
        
Answer:
In a global convection cell less –dense air at the equator rises and flows towards the poles. And from pole, the dense air sinks down and flows back towards the equator.... This movement of air is also supported by the Earth's rotation known as Coriolis Effect.