♥porque las arañas pueden reconocer quien llega a su telaraña?

What are the similarities & differences between a thermistor and a light dependent resistor in physics?

Awave has a wavelength of 7 mm and a frequency of 19 hertz. what is its speed?

A1500 w electric heater is plugged into the outlet of a 120 v circuit that has a 20 a circuit breaker. you plug an electric hair dryer into the same outlet. the hair dryer has power settings of 600 w, 900 w , 1200 w, and 1500 w. you start with the hair dryer on the 600 w setting and increase the power setting until the circuit breaker trips. under what setting does the circuit breaker trip.