1. Calculate angular momentum/kg for the 8 planets 2. What is laser cooling? 3.
ID: 1987939 • Letter: 1
Question
1. Calculate angular momentum/kg for the 8 planets
2. What is laser cooling?
3. A golf ball is hit at 60 m/s at 20 deg above horizontal.
a) How high will it go?
b) How far will it go?
4. A 30 kg sign is hanging from a 10 kg bar 3 meters long. The sign is held by a wire that makes a 40 deg angle with the wall and is attached to the bar at the end. The sign is attached to the bar 2 m from the wall.
a) What is the tension in the wire?
b) What is the horizontal force at the hinge between the bar and the wall?
c) What is the vertical force at the hinge between the bar and the wall?
Explanation / Answer
2)Laser cooling refers to the number of techniques in which atomic and molecular samples are cooled through the interaction with one or more laser light fields. The first example of laser cooling, and also still the most common method of laser cooling (so much so that it is still often referred to as 'laser cooling') is Doppler cooling. 3) a)21.48 b)236.12 4)
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