Answers: 3
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 01:30
Afigure skater is rotating at a rate of 200 revolutions per minute. what is the angular speed, in units of rad/s? 20.9 12000 200 3.33
Answers: 2
Physics, 22.06.2019 07:50
2. -/1 pointsserpse10 2.7.p.017.mi. an object moving with uniform acceleration has a velocity of 14.0 cm/s in the positive x direction when its x coordinate is 2.97 cm. if its x coordinate 2.85 s later is -5.00 cm, what is its acceleration? cm/s2 need ? read it master it
Answers: 1
Physics, 22.06.2019 18:00
Directions: count the number of atoms. ar co2 na3po4 so3 nac2h3o2
Answers: 1
Your sliding contact resistor is controlled by a 10-turn dial with each increment of the dial marked...
English, 19.08.2019 11:50
Mathematics, 19.08.2019 11:50
Mathematics, 19.08.2019 11:50
Computers and Technology, 19.08.2019 11:50
History, 19.08.2019 11:50
Mathematics, 19.08.2019 11:50
Mathematics, 19.08.2019 11:50
Mathematics, 19.08.2019 11:50
Chemistry, 19.08.2019 11:50
Mathematics, 19.08.2019 11:50
Mathematics, 19.08.2019 11:50