2. What are elements made up of?
matter
Hydrogen
substance
atoms
...
Physics, 02.04.2022 14:00 kingbob101
2. What are elements made up of?
matter
Hydrogen
substance
atoms
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 19:00
Ahorizontal force of 400.0 n is required to pull a 1760 n truck across the floor at a constant speed. find the coefficient of sliding friction.
Answers: 1
Physics, 22.06.2019 22:50
What is an electric motor? explain its operation. 2-3 sentence
Answers: 1
Physics, 22.06.2019 23:00
Which of the following will cause an induced current in a coil of wire? the constant field of the earth passing through the coil a magnet resting near the coil a magnet being moved into or out of the coil a wire carrying a constant current near the coil
Answers: 3
Mathematics, 14.04.2021 23:10
Mathematics, 14.04.2021 23:10
Physics, 14.04.2021 23:10
Mathematics, 14.04.2021 23:10
Mathematics, 14.04.2021 23:10
Mathematics, 14.04.2021 23:10
Mathematics, 14.04.2021 23:10
Mathematics, 14.04.2021 23:10
Mathematics, 14.04.2021 23:10
Mathematics, 14.04.2021 23:10
Mathematics, 14.04.2021 23:10