A phone is charged and hung by the cord. It stays on the cord but drops after some time. Explain why the phone did not immediately detach from the cord and fall and explain in terms of force why the phone detach and fell after some time

Awave is produced in a rope. the wave has a speed of 33 m/s and a frequency of 22 hz.

An ionic compound can conduct electricity when a it is dissolved in water b its crystals are ground into powder c it is in solid form d it is heated to just below its melting point

What accounts for an increase in the temperature of a gas that is kept at constant volume? a. energy has been removed as heat from the gas. b. energy has been added as heat to the gas. c. energy has been removed as work done by the gas. d. energy has been added as work done by the gas.