PLEASE HELP ME
1.65 m long broom is being used to sweep away some dirt. The brush is moving the dirt with 4.30 N of force. The person’s hand is 0.55 m from the top of the broom (which is the fulcrum).

a. What force does a person have to apply to sweep the dirt?
b. What is the broom’s ideal mechanical advantage?

(01.02 mc) nicole pushes her bike up a hill. overhead, the sun exerts a gravitational force on earth. which statement is true about the bike and earth? they both experience contact forces. they both experience non-contact forces. the bike experiences a non-contact force and earth experiences a contact force. the bike experiences a contact force and earth experiences a non-contact force. they both experience non-contact forces.

5g of ammonium nitrate was dissolved in 60g of water in an insulated container. the temperature at the start of the reaction was 23.0°c and at the end it was 19.0°c. calculate the energy absorbed by the reaction.

The combining of light nuclei is called blank. blank as in not actually blank. you know what im tryin to say.