Would Democritus recognize the modern atomic model as his own theory? A: Yes, the current atomic model is similar to Democritus's model.
B: Yes, the idea of an atom remains the same even though the
model has changed.
C: No, Democritus thought that atoms were indivisible, but the
current model has subatomic particles.
D: No, Democritus thought that atoms did not have mass, but the
current model can measure atomic mass.

Wo audio speakers are placed on a vertical rail. speaker a is placed at head-level while speaker b is place at some variable height, \delta yδy, above speaker a. both speakers receive simultaneous input from a sine-wave generator so the speakers each produce a pure sinusoidal sound wave with a wavelength of 0.531 meters. calculate the lowest height that speaker b can be placed above speaker a to produce a minimum of sound heard by person standing \delta x = 7.86δx=7.86 meters directly in front of speaker a.

Ababy stroller is a rest on top of a hill which is 10 m high. the stroller and baby have a mass of 20 kg. what is the potential energy of the baby and stroller?

The current in a hair dryer measures 11 amps. the resistance of the hair dryer is 12 ohms. what is the voltage?unit: