1. How far will a car travel in 3 seconds at 20 m/s?
a. 30 m
b. 60 m
c. 10 m
d. 1...
Physics, 17.12.2020 14:00, jimissac68
1. How far will a car travel in 3 seconds at 20 m/s?
a. 30 m
b. 60 m
c. 10 m
d. 120 m
Answers: 2
Physics, 21.06.2019 18:10, eweqwoewoji
Scientists use laser range-finding to measure the distance to the moon with great accuracy. a brief laser pulse is fired at the moon, then the time interval is measured until the "echo" is seen by a telescope. a laser beam spreads out as it travels because it diffracts through a circular exit as it leaves the laser. in order for the reflected light to be bright enough to detect, the laser spot on the moon must be no more than 1.0 km in diameter. staying within this diameter is accomplished by using a special large-diameter laser. part a if λ = 540nm , what is the minimum diameter of the circular opening from which the laser beam emerges? the earth-moon distance is 384,000 km. express your answer to two significant figures and include the appropriate units.
Answers: 1
Physics, 21.06.2019 23:00, yourgirlnevaeh
For general projectile motion, when the projectile is at the highest point of its trajectory, its acceleration is zero? a)the horizontal and vertical components of its velocity are zero. b) its velocity is perpendicular to the acceleration. c)the horizontal component of its velocity is zero. d)its velocity and acceleration are both zero.
Answers: 1
Physics, 22.06.2019 03:40, darkdragon67
Science and technology are interdependent. advances in one lead to advances in the other. give an example of this phenomenon.
Answers: 1
Physics, 22.06.2019 05:20, luceridiaaz
Alfred pushes on a heavy box, but cannot move it. the box has a lot of inertia motion friction gravity
Answers: 1
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