A low-power laser used in a physics lab might have a power of 0.30 mW and a beam diameter of 4.0 mm. Part A. Calculate the average light intensity of the laser beam.
Express your answer using two significant figures.
Part B. Compare it to the intensity of a light bulb producing 100-W light viewed from 2.0 m .
Express your answer using two significant figures.

Awave is produced in a rope. the wave has a speed of 33 m/s and a frequency of 22 hz.

A250-n box is at rest on a frictionless horizotal floor. then a person shoves the box with a non-zero force of magnitude p. which statement best describes the relationship betweeen p and the motion of the box after it was shoved? -the box will not move when p< 250n but otherwise will accelerate at a constant rate that is directly proportional to p - the box will begin moving at a speed that is directly proportional to p, then will gradually slow to a halt -the box will move with constant velocity at a speed that is directly proportional to p -box will accelerate across the floor at a constant rate that is directly proportional to p

The temperature at a point (x, y) is t(x, y), measured in degrees celsius. a bug crawls so that its position after t seconds is given by x = 6 + t , y = 8 + 1 3 t, where x and y are measured in centimeters. the temperature function satisfies tx(3, 9) = 5 and ty(3, 9) = 4. how fast is the temperature rising on the bug's path after 3 seconds? (round your answer to two decimal places.)