5) A train travels 120 km in 90 minutes (min). What is its average speed?

1-10. need . physics. circular motion. 35 points

If jerome is swinging on a rope and transferring energy from gravitational potential energy to kinetic energy, is being done.

(2) (a) you have a simple circuit that consists of only a battery (δvbat=1.5v) and two resistors with resistance r1=10ω and r2=5ω, connected in series with each other. what is the current running through the battery? (b) you re-arrange your circuit so now r2 is attached in parallel to r1 rather than in series. what is the current running through the battery? (c) you add an additional resistor r3=7ω on the same branch as r2. what is the current running through the battery? (d) what is the power dissipated in r3?