1,000 kg car is travelling at 6.5 m/s to the North. A 3,500 kg truck is also travelling North at the same velocity. What is the total momentum of the two vehicles? Please answer ASAP

Awave is produced in a rope. the wave has a speed of 33 m/s and a frequency of 22 hz. what wavelength is produced?

Ihave a density of 1.61g/cm^3 and a mass of 28g. find the missing value

Acapacitor is storing energy of 3 joules with a voltage of 50 volts across its terminals. a second identical capacitor of the same value is storing energy of 1 joule. what is the voltage across the terminals of the second capacitor?