Physics, 27.03.2020 02:12 kelseiroll8554
The 2.3-lb piece of putty is dropped 8.7 ft onto the 22.0-lb block initially at rest on the two springs, each with a stiffness k = 4.0 lb/in. Calculate the additional deflection δ of the springs due to the impact of the putty, which adheres to the block upon contact.
Answers: 1
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, 22.06.2019 02:10, allytrujillo20oy0dib
How is coal extracted from mountaintop removal mines? a. dynamite is used to create underground tunnels where miners go to extract the coal. b. dynamite is used to break apart rocks and then draglines are used to remove the broken rock and reach the coal. c. coal in mountaintops is extracted by digging strips in the landscape to reach the coal. d. placer deposits in mountain river bottoms are removed by
Answers: 2
Physics, 22.06.2019 03:00, tylersabin72
1. a net force of 100 newton’s is applied to a wagon for 5 seconds. this causes the wagon to undergo a change in momentum of
Answers: 1
The 2.3-lb piece of putty is dropped 8.7 ft onto the 22.0-lb block initially at rest on the two spri...
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