Light from a point source located at the origin gets reflected parallel to the x-axis from a large concave mirror. for a constant, a, the equation describing the shape of the mirror on the x-y plane is (a) y2axa (b) y22ax+a ( c) xay+α' (d) x22ay

The us government wants to allocate billions of dollars in the next 10 years to assure our future energy security. the funds will be spread among a variety of possible energy resources. where do you think the government should put the greatest support: solar energy, wind energy, clean coal, oil exploration, gas exploration, or a combination of sources? are there other efforts that should be explored? support your position with cited information for both questions.

Do you agree with scientist’s prediction about the warming of alaska and other polar regions?

Física: un futbolista patea hacia el arco con una velocidad de 15m/ah, calcular: a)el alcance para un ángulo de tiro de 25º, b) el tiempo que el balón permanece en el aire.