Before colliding the momentum of block a is +15.0 kg*m/s, and block b is -35.0 kg*m/s. after, block a has a momentum -12.0 kg*m/s. what is the momentum of block b afterwards? (unit=kg*m/s) remember: right is +, left is - me

The diagram shows a series of volcanic island and a hot spot determine the direction of movement of the tectonic plate that for the island

A2.00-m long piano wire with a mass per unit length of 12.0 g/m is under a tension of 8.00 kn. what is the frequency of the fundamental mode of vibration of this wire?

(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?