Sometime around 2022, astronomers at the european southern observatory hope to begin using the e-elt(european extremely large telescope), which is planned to have a primary mirror 42 m in diameter. let us assume that the light it focuses has a wavelength of 600 nm. (1 light-year = 9.461×1015 m) note: jupiter's diameter dj=1.43×108 m 1) what is the most distant jupiter-sized planet the telescope could resolve, assuming it operates at the diffraction limit? (express your answer to two significant figures.)
smog is a term used to describe air pollution that is a result of the interaction of sunlight with certain chemicals in the atmosphere. one of the primary components of photochemical smog is ozone. while ozone in the stratosphere protects earth from harmful uv radiation, ozone on the ground is hazardous to human health.
energy transformation does happen when you drop a pencil.
the energy turns from potential energy in your hand to kinetic energy as it drops and back to potential energy when it hits the ground.
the efficiency is 11.1%
define efficiency as (energy stored in the spring) / (kinetic energy of the object before compression)*100%.
the moving object had a kinetic energy
the compressed spring stores a so-called elastic energy, which is given by
so the efficiency is: 11.1
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centripetal acceleration is (speed-squared) / (radius)
ca = (6 m/s)² / (9 m)
ca = (36 m²/s²) / (9 m)
ca = (36/9) (m²/m·s²)
centripetal acceleration = 4 m/s²