Ta mission 1 Quelle est la durée maximale d'écoute quotidienne sans risque, dans les conditions décrites pour Louisa ? Donne deux solutions
pour qu'il puisse écouter sa musique plus longtemps sans danger.

Which best represents the law of conservation of mass ?

If the work required to stretch a spring 3 ft beyond its natural length is 15 ft-lb, how much work is needed to stretch it 27 in. beyond its natural length?

The particle p starts from rest at point a at time t = 0 and changes its speed thereafter at a constant rate of 2.8g as it follows the horizontal path shown. determine the magnitude and direction of its total acceleration (a) just before point b, (b) just after point b, and (c) as it passes point c. state your directions relative to the x-axis shown (ccw positive) and choose the angle with the smallest magnitude.