The molecules in a gas are often modeled as small balls. if the molecules all have the same mass, infer what happens if 2 molecules traveling at the same speed collide head on.

17. 1 micrometer (1 µm) equals: A. 10-^3 m B. 10-^6 m C. 10^3 m D. 10^6 m

Which part of a flowering plant attracts insects, birds, and small mammals?

Why is hydrogen set apart from the other elements in the periodic table

A 44 kg block lies on a horizontal frictionless surface. A horizontal force of 110 N is applied to the block. (a) Determine the acceleration of the block. (b) Calculate the distance the block will travel is the force is applied for 8 s.

Carrie observes a blue object. Which color (s) of light does this object absorb

Which statement is NOT true? Light travels with or without a medium Light travels faster than sound Sound must have a medium to travel through Both light and sound must have a medium to travel through

When light bends as it enters a different medium the process is known as what?

Work out the kinetic energy of a 2.5 kg remote-controlled car that is moving at 2 m/s.

Suppose a block moves across a rough horizontal surface at constant speed under the action of a horizontal 3-N force. Which statement concerning this situation is not true? a. There is more than the 3-N horizontal force acting on the block. b.

A m = 2.45 kg object hangs in equilibrium at the end of a rope (taken as massless) while a wind pushes the object with a F W = 18.9 N horizontal force. Find the magnitude of the tension in the rope and the rope's angle from the vertical.