Asound wave has a wavelength of 0.450 meters . if is a speed in cold air 330 meters / seconds what is waves frequency

A10.0 kg cart and a 15kg cart are locked together with a compressed spring between them. they are then released so that the spring pushes the two carts apart. the 10.0 kg cart is moving at 4.5 m/s afterward. how fast is the 15kg cart moving? 3.0 m/s 2.0 m/s 4.5 m/s 5.0 m/s

Which of the following is not am example of a polymer? protein nylon kevlar concreta

Which is the correct symbol for an isotope of iodine with 53 protons and 78 neutrons?