When a person bends an arm a different muscle is used to bring it back to the original position. why can't the same muscle be used to both bend and unbend the arm?

What surprised newton when he started studying at the university?

Convert 32 kilometers to nanometers

What is the SI unit for capacitance?

What charge are electrons

Which is an example of transforming potential energy to kinetic energy? Select two options. a changing thermal energy to electrical energy b changing chemical energy to thermal energy c changing nuclear energy to radiant energy d changing radiant

Two masses are separated by 1 m. suppose the masses are moved so they are 2 m apart how will the gravitational force change

Bob rubs a piece of fur on a hand rubber rod, giving the rod a negative charge. what happens?

The period of a simple pendulum is 3.8 s. the length of the pendulum is doubled. what is the period t of the longer pendulum? t = s

True or false - sound waves can travel across outer space.

In which one of the following locations can a person hear the echo of a sound? a. At least 33.2 meters behind the reflecting surface b. Less than 16.6 meters in front of the reflecting surface c. Less than 33.2 meters behind the reflecting surface d.