When an object moves in a straight line, which statement is true?  A. the object moves at a constant speed, the resultant force is zero

B. the object accelerates , the resultant force is zero

C. the object moves at a constant speed, the forward force is greater than the resistive force

D. The object requires a resultant force in order to move at a constant speed

Why is alchemy not considered to be a science ?

Acertain radio station broadcasts radio waves that have a wavelength of 298cm what is its broadcast frequency?

On a horizontal frictionless surface, a small block with mass 0.200 kg has a collision with a block of mass 0.400 kg. immediately after the collision, the 0.200 kg block is moving at 12.0 m/s in the direction 30° north of east and the 0.400 kg block is moving at 11.2 m/s in the direction 53.1° south of east. use coordinates where the +x-axis is east and the +y-axis is north.(a) what is the total kinetic energy of the two blocks after the collision (in ) what is the x-component of the total momentum of the two blocks after the collision? (indicate the direction with the sign of your ) what is the y-component of the total momentum of the two blocks after the collision? (indicate the direction with the sign of your answer.)