Explain how an increase in temperature might affect glacier size and water salinity

According to social exchange theory, altruistic behaviors benefit the individual who performs them. t/f

You have a resistor and a capacitor of unknown values. first, you charge the capacitor and discharge it through the resistor. by monitoring the capacitor voltage on an oscilloscope, you see that the voltage decays to half its initial value in 2.70 miss . you then use the resistor and capacitor to make a low-pass filter. what is the crossover frequency fc?

Awave with a frequency of 500 hz is traveling at a speed of 100 m/s. what is the wavelength?