3 Points
The half-value layer for lead for g rays from 60Co is 12.8 mm. An electrometer gave a count rate of 35 pulses per second when at a
certain distance from a source, with no lead between source and detector. If 6 mm of lead were then inserted between source and
detector, the count rate (in pulses per second) would be nearest to:
A. 16
OB. 8
OC. 20
D. 25
OE. 75
Answers: 2
Physics, 22.06.2019 09:30, anytka21ovxqoa
How would a small bar magnet be oriented when placed at position x?
Answers: 2
Physics, 22.06.2019 12:00, Sariyahhall1
Infrared radiation has wavelengths that are shorter than visible light is part of the visible light spectrum has wavelengths that are longer than visible light has the same wavelengths as ultraviolet radiation
Answers: 1
Physics, 22.06.2019 14:10, nikki4367
Amachinist turns the power on to a grinding wheel, at rest, at time t = 0 s. the wheel accelerates uniformly for 10 s and reaches the operating angular velocity of 96 rad/s. the wheel is run at that angular velocity for 40 s and then power is shut off. the wheel slows down uniformly at 1.5 rad/s2 until the wheel stops. in this situation, the time interval of deceleration is closest to:
Answers: 3
3 Points
The half-value layer for lead for g rays from 60Co is 12.8 mm. An electrometer gave a coun...
Geography, 09.06.2021 19:50
History, 09.06.2021 19:50
Mathematics, 09.06.2021 19:50
Mathematics, 09.06.2021 19:50