6.1 The picture shows a balloon containing air.
a Explain how the particles of air inside the balloon create pressure.
b The air in the balloon is heated up by leaving it in a warm place.
Give two effects that this has on the air particles.
Describe one way in which the balloon changes when it is left in a warm place

Avoltaic cell converts chemical energy to

How many atoms of nitrogen are in the chemical formula ni(w on

Suppose a force of 60 n is required to stretch and hold a spring 0.1 m from its equilibrium position. a. assuming the spring obeys hooke's law, find the spring constant k. b. how much work is required to compress the spring 0.5 m from its equilibrium position? c. how much work is required to stretch the spring 0.6 m from its equilibrium position? d. how much additional work is required to stretch the spring 0.1 m if it has already been stretched 0.1 m from its equilibrium? a. kequals 600