![ansver](/tpl/images/cats/User.png)
Answers: 1
![](/tpl/images/ask_question.png)
![](/tpl/images/ask_question_mob.png)
Another question on Physics
![question](/tpl/images/cats/fizika.png)
Physics, 21.06.2019 17:10
Space-time metric ds2= -dt2+at2dx2+bt2dy2+ct2dz2 (a)how does the area of a rectangle with vertices at ( x=0, y=0, z=0 ), (1,0,0 ), ( 0,1,0 ) and (1,1,0 ) changes with time? (b) if a photon moving in the x direction starts from the origin at t=1, when does it reach x=l? (ds=0 for the trajectory of a photon.) (c) the proper time for a particle is defined by cd=ds. what is the proper time for a particle to move along the trajectory ( x(t)=t, y(t)=0, z(t)=0 ) from t=0 to 1 ? what is the condition on the parameter a so that the velocity of the particle never exceeds the speed of light ?
Answers: 2
![question](/tpl/images/cats/fizika.png)
Physics, 22.06.2019 03:30
The solar panels used by mark function because of the photoelectric effect. light shines on the cells causing electrons to be ejected from the metal, which produces an electric current. at night on mars, no light will fall on the solar cells and no electric current will be generated. according to your notes, what type of light is typically needed to cause the photoelectric effect? a)visible b)ultraviolet c)infrared
Answers: 1
![question](/tpl/images/cats/fizika.png)
Physics, 22.06.2019 05:30
Imagine that someone pushes one marble toward a motionless marble. would there still be action-reaction forces involved in the collision? how might the marbles’ motions be changed? ?
Answers: 1
![question](/tpl/images/cats/fizika.png)
Physics, 22.06.2019 09:20
Question 11 of 13 (1 point) jump to question: a stairway, ladder, or ramp must be present in excavations in which of the following situations? a. all trenches must have access/egress b. the trench is more than 15 feet wide but only 1 ½ feet deep c. the trench is more than 4 feet deep and the devices must be within 25 feet of all workers
Answers: 1
You know the right answer?
Facts about conolizing into mars?...
Questions
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/istoriya.png)
History, 28.10.2020 22:20
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/en.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 28.10.2020 22:20
![question](/tpl/images/cats/fizika.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 28.10.2020 22:20
![question](/tpl/images/cats/en.png)
![question](/tpl/images/cats/istoriya.png)
![question](/tpl/images/cats/himiya.png)
![question](/tpl/images/cats/mkx.png)
![question](/tpl/images/cats/en.png)
English, 28.10.2020 22:20
![question](/tpl/images/cats/informatica.png)
Computers and Technology, 28.10.2020 22:20
![question](/tpl/images/cats/mat.png)
Mathematics, 28.10.2020 22:20
![question](/tpl/images/cats/biologiya.png)
Biology, 28.10.2020 22:20
![question](/tpl/images/cats/himiya.png)
![question](/tpl/images/cats/en.png)
![question](/tpl/images/cats/himiya.png)
![question](/tpl/images/cats/geografiya.png)
Geography, 28.10.2020 22:20
![question](/tpl/images/cats/istoriya.png)
History, 28.10.2020 22:20