A laser produces a wavelength of 523 nm in pulses whose duration is 3.0X 10-9 s. If the laser produces 0.376 J of energy per pulse, b)Calculate the energy if the pulse it extended to 0.05 seconds.

Before it was launched, a helium-filled balloon had a pressure of 201 kpa at a temperature of 27°c. at an altitude of 15,000 m, the pressure had decreased to 2.5 kpa and the temperature had dropped to -14 °c. the volume of the balloon increased to 59.3 m3. what is the original volume of the balloon? 13 m3 0.85 m3 0.077 m3 1.17 m3