Dr. lao has discovered a substance that emits energy in the form of waves. if dr. lao observes that these waves can travel through a perfect vacuum, then

Which statement is true for light passing into a medium that is more optically dense than the first medium through which it past

If vx = 7.00 units and vy = -7.60 units, determine the magnitude of v⃗ . determine the direction of v⃗ .

3. a lunar exploration vehicle was created by a research team. it weighs 3,000 kg on the earth. it needs an acceleration of 10 m/s2 on the moon. in order to have the same acceleration, what will be the net force acting on the vehicle on the earth?