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an ambulance has its sirens on as it travels down the road. the dog in front of the ambulance will hear a sound since the waves are pushed together in front of the car.

What are the factors that affect the resistance of a wire?

True or false when elements combine to form a mixture, the resulting chemical properties may be very different from those of the elements that make it.

What would be the result of an alpha particle coming into a magnetic field? a) the alpha particle will stop moving. b) the alpha particle will reverse its direction. c) the alpha particle will be deflected in a curve path. d) the alpha particle will continue to travel in a straight line.