I think it is d I hope this help you if not let me know if it is not right
Answer:
Waves interact with objects and other waves.
Explanation:
Answer:1.5
Explanation:
Given
mass of first cart
initial Velocity
mass of second cart
In the absence of External Force we can conserve momentum
Final kinetic Energy of two masses
Initial Kinetic Energy
He was the first American to orbit the earth.