Physics, 05.04.2020 13:27 kiragor2545
A hydrogen line in a star's spectrum has a frequency of 6.17x10^14 Hz when stationary. In Rigel's spectrum, is it shifted downward by 4.26x10^10 Hz. What is Rigel's velocity relative to us? (Unit=m/s)
Answers: 1
Physics, 21.06.2019 23:30
After a big snowfall, you take your favorite rocket-powered sled out to a wide field. the field is 195 m across, and you know that your sled accelerates at a rate of 3.65 m/s2 when the rocket is on. how much time will it take the sled to cross the field starting from rest, assuming the rocket is on the whole time?
Answers: 1
Physics, 23.06.2019 10:30
Car batteries are often rated in amp-hours. this rating indicates the quantity of charge that can pass through the battery before the battery's chemical energy must be restored by the car's generator or some other source. the amp-hour unit is convenient for simple calculations. for example, a 60-amp-hour battery can supply a current of 1.0 a for 60 h (or 60 a for 1.0 h) before going dead. find the energy stored in the following. (a) a 58 a-h, 10 v car battery(b) a 1.3 a-h, 1.7 v flashlight battery
Answers: 1
A hydrogen line in a star's spectrum has a frequency of 6.17x10^14 Hz when stationary. In Rigel's sp...
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