Physics, 23.09.2019 23:00, bskyeb14579
Hey guys! i need about 5 questions answered! i will give out the brainliest answer to the first person to answer these questions! each question is 5 points! total: 25 points.
1. how many stars are in a galaxy?
a. hundreds
b. thousands
c. millions
d. billions
2. which galaxy does not have a distinctive shape?
a. an irregular galaxy
b. an elliptical galaxy
c. a barred-spiral galaxy
d. a clustered galaxy
3. how do galaxies exist in the universe?
a. they exist together with no empty space in between them.
b. they spin within a few miles of each other.
c. they form clusters that are light-years away from other clusters.
d. they are evenly distributed throughout the universe.
4. what is a light-year?
a. the distance light travels from the sun to the earth
b. the distance light travels in one orbit of the moon
c. the time it takes light to travel across the universe
d. the distance light travels in one earth year
5. how long does it take for light to reach earth from a star 8 light-years away?
a. 8 earth minutes
b. 16 earth minutes
c. 8 earth years
d. 16 earth years
! ( science )
Answers: 2
Physics, 21.06.2019 17:10, emilylunaa
What is the radius of the circular path ofa charged particle in a magnetic field?
Answers: 1
Physics, 22.06.2019 15:00, koranbutterton
Astudent throws a water balloon with speed v0 from a height h = 1.76 m at an angle θ = 21° above the horizontal toward a target on the ground. the target is located a horizontal distance d = 9.5 m from the student’s feet. assume that the balloon moves without air resistance. use a cartesian coordinate system with the origin at the balloon's initial position. (a) what is the position vector, rtarge t, that originates from the balloon's original position and terminates at the target? put this in terms of h and d, and represent it as a vector using i and j. (b) in terms of the variables in the problem, determine the time, t, after the launch it takes the balloon to reach the target. your answer should not include h. (c) create an expression for the balloon's vertical position as a function of time, y(t), in terms of t, vo, g, and θ. (d) determine the magnitude of the balloon's initial velocity, v0, in meters per second, by eliminating t from the previous two expressions.
Answers: 3
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