Sonar relies mostly on which of the following wave properties

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.

For the car in the picture ,in which direction is the normal force? -into the screen -down -out of the screen -up

Which of the following changes will increase the capacitance of a parallel-plate capacitor? (there could be more than one correct choice.) a) increase the charge on the plates b) decrease the poten5al between the plates c) increase the potential between the plates d) introduce a dielectric material between the plates e) decrease the separation between the plates