Acart with mass m1 = 3.2 kg and initial velocity of v1,i = 2.1 m/s collides with another cart of mass m2 = 4.3 kg which is initially at rest in the lab frame. the collision is completely elastic, and the wheels on the carts can be treated as massless and frictionless. what is the velocity of m1 in the center of mass frame after the collision?

The total amount of energy contained in an object

The magnitude of the magnetic field at a certain distance from a long, straight conductor is represented by b. what is the magnitude of the magnetic field at twice the distance from the conductor? a. at twice the distance, the magnitude of the field is 4b.b. at twice the distance, the magnitude of the field is 2b.c. at twice the distance, the magnitude of the field is b/2.d. at twice the distance, the magnitude of the field is b/4.e. at twice the distance, the magnitude of the field remains equal to b.

An airplane is flying with a velocity of 240 m/s at an angle of 30.0∘ with the horizontal, as the drawing shows. when the altitude of the plane is 2.4km,a flare is released from the plane. the flare hits the target on the ground. what is the angle θ?