Physics, 25.01.2021 03:40 zmirandalove100
A student places a cup of cold water on a counter in a hot room. After a short time, the student notices that the water in the cup is no longer cold. Explain why the water in the cup is no longer cold?
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, 23.06.2019 05:30
Herman is walking his pet fish, leo , back and forth along the canal. suppose the canal is 30 meters long and he goes up and back 25 times. a) what distance has herman walked?
Answers: 3
A student places a cup of cold water on a counter in a hot room. After a short time, the student not...
Biology, 08.03.2021 05:00
Mathematics, 08.03.2021 05:00
English, 08.03.2021 05:00
Mathematics, 08.03.2021 05:00
Biology, 08.03.2021 05:00
Biology, 08.03.2021 05:00
Mathematics, 08.03.2021 05:00
History, 08.03.2021 05:00
Mathematics, 08.03.2021 05:00
Social Studies, 08.03.2021 05:00
Biology, 08.03.2021 05:00