subject
Physics, 23.10.2019 18:20 Robyn32

How was the speed of light measured in a precise way?
by timing the speed of falling meteorites
by using rotating mirrors to measure light’s round trip travel to a distant mountain
by timing how long it takes for an assistant far away to turn on a lantern after the
scientist turns one on
by watching for eclipses

ansver
Answers: 3

Another question on Physics

question
Physics, 22.06.2019 12:10
Consider a one meter long horizontal pipe with a constant 100 cm^2 cross sectional area. water flows rightward into the pipe at x = 0 with flow velocity 02m/sec at every point within the pipe intake area. at x=1, the rightward flow rate is 0.192 m/sec. assume the water is a conserved quantity in the pipe, so there must be a leak (a sink) somewhere in the pipe. 1. compute net volumetric flow of the source if the system to be in equilibrium. 2. now assume the pipe in the problem has no leaks. compute the net volumetric rate of change for the system.
Answers: 3
question
Physics, 22.06.2019 13:50
Two students, each riding bicycles, start from the same apartment building and ride to the same building on campus, but each takes a different route. the first student rides 1100 m due east and then turns due north and travels another 1430 m before arriving at the destination. the second student heads due north for 1930 m and then turns and heads directly toward the destination.at the turning point, how far is the second student from the destination?
Answers: 3
question
Physics, 22.06.2019 20:00
Anika asks eva to roll a basketball and then a bowling ball to her. which requires more force to roll, and why?
Answers: 3
question
Physics, 22.06.2019 20:40
Abasketball star covers 2.65 m horizontally in a jump to dunk the ball. his motion through space can be modeled precisely as that of a particle at his center of mass. his center of mass is at elevation 1.02 m when he leaves the floor. it reaches a maximum height of 1.90 m above the floor and is at elevation 0.910 m when he touches down again. (a) determine his time of flight (his "hang time"). (b) determine his horizontal velocity at the instant of takeoff. (c) determine his vertical velocity at the instant of takeoff. (d) determine his takeoff angle. (e) for comparison, determine the hang time of a whitetail deer making a jump with center-of-mass elevations yi = 1.20 m, ymax = 2.45 m, and yf = 0.750 m.
Answers: 1
You know the right answer?
How was the speed of light measured in a precise way?
by timing the speed of falling meteori...
Questions
question
History, 07.05.2021 15:50
question
Mathematics, 07.05.2021 15:50
question
Mathematics, 07.05.2021 15:50
Questions on the website: 13722363