In order to fly horizonatally at a steady speed, which two of the forces shown on the aeroplane must be equal. (The forces shown on the aeroplane are air friction, weight and engine thrust)

In order of decreasing light-transmitting capabilities of materials, which is the correct sequence? a. transparent -> translucent -> opaque b. opaque -> transparent -> translucent c. opaque -> translucent -> transparent d. translucent -> transparent -> opaque

If two students are running down the hall toward each other, trying to get to class, and they have the same mass and acceleration, what will happen when they collide? will their forces cancel out or will each one experience a reaction?

How many neutrons does plutonium -196 with an atomic number of 78.