Unfortunately, nuclear power isn't a good answer to our need to get loose from our Middle East oil dependency. For all its chrome-plated promise, nuclear power has fallen flat on its face and the worst is yet to come. Nucleafpower plants are now facing a challenge that their designers never anticipated, though they should have-what to do with the power plants after their useful lives are over. Nuclear power plants last 30 years or less. After 30 years, a reactor's pressure vessel becomes brittle and subject to breakage, simply as a result of constant bombardment by nuclear particles. In addition, after 30 years or so, the radioactivity in pipes and valves has accumulated to a point where maintenance workers are receiving unacceptable doses of radioactivity, so more maintenance crews must come in (to reduce the time any one worker spends getting zapped), which makes maintenance expensive. Old nuclear plants cannot simply be abandoned, or demolished with a wrecking ball. They are full of radioactivity, all of which must be kept away from living things. Much of the radioactivity decays away within 50 years, but three million years must pass before a nuclear plant becomes no more radioactive than the original uranium that initially fueled it.
Q:Which of the following can be best inferred from the passage?
Although, a few years ago the fundamental facts about the silky way seemed fairly well ................... now even its mass and its radius have come into question.
Measurement is, like any other human endeavour, a complex activity, subject to error, not always used .................. and frequently misinterpreted and misunderstood.
Is this work of incessant and feverish activity.men have little time to think,much less to consider ideals and objectives yet how are we to act even in the present unless we know which way we are going and what our objectives are?It is only in the peaceful atmosphere of a university that these basic problems can be adequately considered.It is only when the young men and women who are in the university today and on whom the burden of life's problem will fall tomorrow,learn to have clear objectives and standards of values that there is hope for the next generation.The past generation produced some great men but as a generation it led the world repeatedly to disaster.Two world wars are the price that has been paid for the lack of wisdom on men's part in this generation.I think that there is always a close and intimate relationship between the end we aim at and the means adopted to attain it,Even if the end is right but the means are wrong,it will vitiate the end or divert us in a wrong direction.Means and ends are thus intimately and inextricably connected and cannot be separated.That indeed,has been the lesson of old taught us by many great men in the past but unfortunately it is seldom remembered.iii. The two world wars are the price that man paid due to:
