You did 150 joules of work lifting a 120 - N backpack.

how high did you lift the backpack?

how much did the backpack weigh in pounds

1) Why do the different rocks exposed in the Grand Canyon appear in layers for the most part? Where are the oldest layers of rock found? Where are the youngest rocks found?

A motorbike travels 45 miles in 15 minutes, what is its speed (hint change the minutes to hours!)

Silvia is driving at the speed limit of 25m/s when she sees an ambulance approaching in her rearview mirror. To move out of its way, she accelerates to 32 m/s in 3 seconds. What was her acceleration.

A 0.32 μc particle moves with a speed of 18 m/s through a region where the magnetic field has a strength of 0.95 t. you may want to review (pages 773 - 777). part a at what angle to the field is the particle moving if the force exerted on it is 4.

What is the purpose of the metal core in an electromagnet? It is magnetized and induces a current in the solenoid to decrease the magnetic field strength. It is magnetized and induces a current in the solenoid to increase the magnetic field strength.

A rock with mass m = 3.60 kg falls from rest in a viscous medium. The rock is acted on by a net constant downward force of F = 15.

Two electrons are 2.3nm apart. What is the force between two electrons?

3. In a demonstration learning activity, A. the teacher shows children how something works or how to complete an entire activity. B. each child shows and tells about a favorite toy. C.

A 0.12 kg paper airplane flies in a straight line at a speed of 1.3 m/s. How much kinetic energy does the airplane have?

Each atom is composed of electrons and positive material. The mass of the atom is evenly spread throughout the atom. Neutrons are located in the center of the atom. Positive charge occupies a very small volume in the atom.