Porfa respondanme esto lo mas rapido posible 1- Un átomo de fósforo se representa como .
a- ¿Cuáles son sus números másico y atómico?
b- ¿Cuántos protones y cuántos neutrones tiene?
c- ¿Existe algún otro átomo con 15 protones que no sea un átomo de
fósforo? ¿Por qué?
2- Un átomo tiene 16 protones y 18 neutrones.
a- ¿Cuántos electrones tiene? Si gana dos electrones, ¿en qué tipo de ion se
transforma?
b- Si usamos la letra x para representar al elemento, ¿Cómo se representan
el átomo y el ion?

A23 kg log of wood begins from rest, 300 m up a sluice (a water track used to transport logs, think of it as an inclined plane with negligible friction) inclined at 20° to the horizontal. after it reaches the flat waterway at the bottom it collides elastically with a 100 kg block of wood initially at rest near the base of the incline. (a) how long does it take the 23 kg log to travel down the incline? (b) what is the speed of the 23 kg log at the bottom of the incline? (c) what are the velocities of both blocks of wood after the collision? (d) what is the total kinetic energy before the collision? (e) what is the kinetic energy of the 23 kg log after the collision? (f) what is the kinetic energy of the 100 kg block of wood after the collision? (g) what is the total kinetic energy after the collision? (h) compare the total initial and total final kinetic energies. is this consistent with what you would expect for elastic collisions? explain!

Jackson is designing a new heater, and he wants to experiment with different thermally conductive materials. which of these materials would be useful in conducting heat?

Why do astronauts in the space shuttle weigh less?