Alaser is used in eye surgery to weld a detached retina back into place. the wavelength of the laser beam is 537 nm, while the power is 2.0 w. during surgery, the laser beam is turned on for 0.050 s. during this time, how many photons are emitted by the laser?

The great sandini is a 60.0-kg circus performer who is shot from a cannon (actually a spring gun). you don’t find many men of his caliber, so you him design a new gun. this new gun has a very large spring with a very small mass and a force constant of 1100 n/m that he will compress with a force of 4400 n. the inside of the gun barrel is coated with teflon, so the average friction force will be only 40.0 n during the 4.00 m he moves in the barrel. at what speed will he emerge from the end of the barrel, 2.50 m above his initial rest position?

Increased ozone in the lower atmosphere near the ground results primarily from

According to research, which of the following statements reflecting the relationship between emotion and the prefrontal cortex is false? select the best answer from the choices provided the prefrontal cortex to regulate one's emotional response. the prefrontal cortex is activated when processing information associated with stress. sensory input indicating emotion first enters the prefrontal cortex before traveling to the amygdala. the prefrontal cortex processes information associated with emotional pleasure.