Physics, 06.07.2019 06:30 xdimplesjoon
How many half-lives would have to pass before the radioactivity of an isotope falls to less than 1% of its original value?
Answers: 1
Physics, 21.06.2019 22:00
•• al and bert are jogging side-by-side on a trail in the woods at a speed of 0.75 m/s. suddenly al sees the end of the trail 35 m ahead and decides to speed up to reach it. he accelerates at a constant rate of 0.50 m/s2, while bert continues on at a constant speed. (a) how long does it take al to reach the end of the trail? (b) once he reaches the end of the trail, he immediately turns around and heads back along the trail with a constant speed of 0.85 m/s. how long does it take him to meet up with bert? (c) how far are they from the end of the trail when they meet?
Answers: 3
Physics, 22.06.2019 14:10
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
Physics, 22.06.2019 19:50
What are the dimensions of the cross section that passes through the points a, f, g, and d?
Answers: 2
Physics, 23.06.2019 04:31
Describe the three ray tracing steps used to identify an image for the given situation.
Answers: 1
How many half-lives would have to pass before the radioactivity of an isotope falls to less than 1%...
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