What is the intensity, in watts per square meter, of a laser beam that is 90.0% absorbed by a 2.15-mm diameter spot of cancerous tissue and must deposit 525 J of energy to it in a time period of 4.2 s?

Aspaceship starting from a resting position accelerates at a constant rate of 9.8 meters per second per second. how far will the spaceship travel if its final speed is 1 percent the speed of light (300,000,000 m/s)? a. 3.1 × 106 m b. 2.94 × 108 m c. 7.8 × 1010 m d. 4.6 × 1013 m