Es muy urgente porfavor! ( solo me teneis que ayudar a sacar el apartado d, e y f porfavor!
Un ventilador, de 50 cm de radio, gira a 150 rpm cuando se desconecta de la corriente,
tardando medio minuto en pararse. Calcula:
a) La velocidad angular inicial
b) La aceleración angular
c) El número de vueltas que da hasta pararse
d) El espacio recorrido por el punto del medio y por el extremo de una de sus aspas, mientras se
está parando
e) La velocidad del extremo a los 25 s
f) La aceleración tangencial, normal y total de ese punto en ese instante

Ineed the answers for these promblems i have

Astone is thrown with a speed v0 and returns to earth, as the drawing shows. ignore friction and air resistance, and consider the initial and final locations of the stone. which one of the following correctly describes the change δpe in the gravitational potential energy and the change δke in the kinetic energy of the stone as it moves from its initial to its final location? options a.δpe = 0 j and δke = 0 j b.δpe is positive and δke is negative c.δpe = 0 j and δke is positive d.δpe is negative and δke is positive e.δpe = 0 j and δke is negative

4. now look at the green lines you created by connecting the three boiling point data points and the three melting point data points. for each of these lines, describe any trends you see. 5. locate the elements on your periodic table that you circled in green on your graph. what term or description would you use to identify these elements with respect to the periodic table? 7. using the room temperature line (orange line) and your periodic table, make lists that identify the state of matter (gas, liquid, or solid) in which each element you plotted exists at room temperature. explain your answers.