1. Why do certain elements have isotopes?
2. What determines atomic mass?
3. Do electr...
Answers: 1
Physics, 22.06.2019 17:40, cravens511peeelg
The first-order reaction aβ2b+c has rate constant 0.538 sβ1. if the initial concentration of a is 0.867 mol lβ1, what is the half-life of the reaction in seconds? remember to use correct significant figures in your answer (round your answer to the nearest hundredth). do not include units in your response.
Answers: 3
Physics, 22.06.2019 22:20, queenbee2994
One hazard of space travel is debris left by previous missions. there are several thousand masses large enough to detect by radar orbiting the earth, but there are far greater numbers of very small masses such as flakes of paint. calculate the force exerted by a 0.110 mg chip of paint that strikes a space shuttle window at a relative speed of 5.00 β 103 m/s and sticks, given the collision lasts 6.00 β 10-8 s. such a collision chipped the window of the ill-fated challenger in june 1983, causing $50,000 of damage.
Answers: 2
Physics, 23.06.2019 02:40, ayoismeisalex
When doing scientific research ,the sources used should be ?
Answers: 1
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