It took 3.5 hours for a train to travel the distance between two cities at a velocity of 120 km/hr how many kilometers lie between the two cities

When you turn on a battery-operated device, an electrical circuit is

Light traveling in water, nwater = 1.33, strikes a plastic block at an angle of incidence of 51.4°; part of the beam is reflected and part is refracted. if the index of refraction of the plastic is 2.0, what is the angle made by the reflected and refracted beams?

Sunidhi made a study chart about changes in states of matter. which headings best complete the chart?