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? vf* =

What type of relationship exists between the length of a wire and the resistance, if all other factors remain the same? o a. resistance is directly related to length. ob. resistance is directly related to the square of the length. c. resistance is inversely related to the length. d. resistance is inversely related to the square of the length. reset next

The mass of the sun is 1.99×1030kg and its distance to the earth is 1.50×1011m. what is the gravitational force of the sun on the earth?

Emagnitude of the electrical force acting between a +2.4 ×  10–8  c charge and a +1.8 ×  10–6  c charge that are separated by 0.008 m is    n, rounded to the tenths place.