Physics, 13.01.2021 17:10 holaadios222lol
A ball thrown horizontally at 20.0 m/s from the roof of a building lands 30.0 m from the base of the building. How tall is the building?
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, 21.06.2019 19:30
Asun-sized star will spend most of its lifetime as a: white dwarf red giant protostar main-sequence star
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Physics, 22.06.2019 00:30
What is relative velocity? in which condition is relative velocity known by adding the velocity of the first body and that of the second body
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Physics, 22.06.2019 03:00
Lymphocytes known as blastocysts make antibodies that fight infection. select the best answer from the choices provided t f
Answers: 2
A ball thrown horizontally at 20.0 m/s from the roof of a building lands 30.0 m from the base of the...
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