What are the two possible explanations for not seeing something glowing brightly along every line-of-sight in the sky? i. the universe is infinite in size and infinitely old, but dust absorbs starlight from far away stars. ii. the universe has a finite number of stars. iii. the universe is changing in some way as to prevent us from seeing an infinite number of stars. a) i and ii
b) i and iii
c) ii and iii
d) i, ii and iii
Answers: 1
Physics, 21.06.2019 16:30, rheamskeorsey33
A12-kg bag of groceries is tossed onto a table at 4.0 m/s and slides to a stop in 2.2 s . modify the equation fδt=δ (mv) to find the force of friction.
Answers: 2
Physics, 22.06.2019 17:00, Gabriel134
Two conductors, a and b, are each in the shape of a tetrahedron. but of different sizes. they are charged in the following manner: 1. tetrahedron a is charged from an electrostatic generator to charge q. 2. tetrahedron a is briefly touched to tetrahedron b. 3. steps 1 and 2 are repeated until the charge on tetrahedron b reaches a maximum value. if the charge on tetrahedron b was q/4 after the first time it touched tetrahedron a. what is the final charge qbmax on tetrahedron b?
Answers: 2
Physics, 22.06.2019 17:50, manou76
Two identical stars with mass m orbit around their center of mass. each orbit is circular and has radius r, so that the two stars are always on opposite sides of the circle. (a) find the gravitational force of one star on the other. (b) find the orbital speed of each star and the period of the orbit. (c) how much energy would be required to separate the two stars to infinity?
Answers: 1
What are the two possible explanations for not seeing something glowing brightly along every line-of...
Physics, 17.05.2021 06:50
Mathematics, 17.05.2021 06:50
Physics, 17.05.2021 06:50
Mathematics, 17.05.2021 06:50
English, 17.05.2021 06:50
Chemistry, 17.05.2021 06:50