1- Discuss the relationship between the size and weight of an object and the amount of friction that is present 2- How can friction can be both a positive and negative aspect in our everyday lives. Use examples to support your statements.

Determine el momento angular de un rueda de 3000g moviendose a 10m/s con un radio de giro de 400cm

If an astronaut takes an object to the moon the following is true (choose only one). a the mass will change but the weight will be the same. b both the mass and the weight of the object will be the same. c the weight will change but the mass will be the same. d both the mass and the weight of the object will change.

Select all the correct answers. which changes will increase the rate of reaction during combustion? decreasing the area of contact between the reactants adding more oxygen to the reaction removing heat from the reaction changing the reactants from solid form to powdered form lowering the exposure of the reactants to air