Physics, 31.07.2019 19:30 starlightmoon213
Astudent pushes a 40-n block across the floor for a distance 0f 10 m how much work was done to move the block?
Answers: 2
Physics, 21.06.2019 18:10
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, 22.06.2019 01:00
15. give an example for some particles or waves that are moving faster than light in everyday life 16. what is a laser? 17. what is an oscilloscope? 18. what does it means practically that nothing is faster than light in vacuum? 19. what is vacuum?
Answers: 2
Physics, 22.06.2019 11:30
Which accounts for an increase in the temperature of a gas that is kept a constant volume
Answers: 1
Astudent pushes a 40-n block across the floor for a distance 0f 10 m how much work was done to move...
Physics, 25.11.2019 23:31
Computers and Technology, 25.11.2019 23:31