PLEASE HELP ME!! Two train cars with the same mass (30,000 kg) are traveling in the same direction when they collide. Train Car A has a velocity of 10
m/s and Train Car B has a velocity of 5 m/s. What is their total momentum after the collision? Make sure to show all your work and
include proper units.
U Font Family

A2k pendulum has a speed of 1 m/s at a height of 1/2 meter

(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?

You have a resistor and a capacitor of unknown values. first, you charge the capacitor and discharge it through the resistor. by monitoring the capacitor voltage on an oscilloscope, you see that the voltage decays to half its initial value in 2.70 miss . you then use the resistor and capacitor to make a low-pass filter. what is the crossover frequency fc?