Answer: 
Explanation:
Given
The velocities of the protons are 400 m/s and 450 m/s
Mass of the Proton is 
Since they travel in the opposite direction, therefore, their momentum cancels out each other.
Momentum is the product of mass and velocity
The direction of momentum is in the direction of proton having 450 m/s velocity.
Answer: It does not include alpha rays
Explanation: It does not include alpha rays
Answer:
A microchip in the phone modulates (or varies) a radio wave using the electrical signal. The radio wave travels through the air to a nearby cell tower; the tower sends your voice to the person you are calling and the process is reversed so that the person on the other end can hear your voice.
Please Mark Brainliest If This Helped!
Momentum is a product of mass and the velocity thus the momentum will be 5100*12 = 61200 kgm/s
The answer i got was c. gravity and strong
i hope it helps
