subject
Physics, 21.08.2019 22:10 alex7881

An alien is zipping toward the earth in its shiny new space vehicle. as you watch it approach from the surface of the earth, you measure the speed of the space vehicle to be 0.75c. since this alien is of the friendly type and wants you to know it has come in peace, the alien sends a message to you using radio wave frequencies in the electromagnetic spectrum.
1. if both you and the alien were to measure the speed at which this message is traveling through space, what would each of you conclude?
a) you measure the message to be traveling at 1.75 c and the alien measures it to be traveling at 0.25 c
b) you measure the message to be traveling at 1.75 c and the alien measures it to be traveling at c
c) you both measure the message to be traveling at c.
a is not the correct answ

ansver
Answers: 1

Another question on Physics

question
Physics, 22.06.2019 07:30
Select all of the following that are equal to an impulse of 20 unitsa) force= 5, time= 5.5b) force= 25, time= 0.8c) force= 0.1, time= 200d) force= 10, time= 2(its b, c, and d)(also in order to find answer they have to add to get the unit)ex= 25x.8=20 or .1x200=20
Answers: 1
question
Physics, 22.06.2019 10:00
There are two-speed cameras, one in an are where the speed limit is 30 km/h and another where the speed limit is 50 km/h. in which will there be a smaller time interval between the photographs? explain your answer.
Answers: 1
question
Physics, 22.06.2019 17:50
Which of the following best describes internal energy? a. the difference between the kinetic and potential energies of the particles in a system b. the sum of the kinetic and potential energies of the particles in a system c. the sum of the kinetic and thermal energies of the particles in a system d. the difference between the kinetic and thermal energies of the particles in a system
Answers: 2
question
Physics, 22.06.2019 21:20
Astone is dropped from the upper observation deck of a tower, 250 m above the ground. (assume g = 9.8 m/s2.) (a) find the distance (in meters) of the stone above ground level at time t. h(t) = (b) how long does it take the stone to reach the ground? (round your answer to two decimal places.) s (c) with what velocity does it strike the ground? (round your answer to one decimal place.) m/s (d) if the stone is thrown downward with a speed of 2 m/s, how long does it take to reach the ground? (round your answer to two decimal places.) s
Answers: 3
You know the right answer?
An alien is zipping toward the earth in its shiny new space vehicle. as you watch it approach from t...
Questions
question
Mathematics, 13.02.2021 14:00
question
Mathematics, 13.02.2021 14:00
question
Mathematics, 13.02.2021 14:00
question
Computers and Technology, 13.02.2021 14:00
Questions on the website: 13722360