Determine how much energy enters your eye per second

Assignment Help Physics

Reference no: EM13516330

You are standing 1.9m from a 130W- lightbulb.

a. If the pupil of your eye is a circle 5.0mm in diameter, how much energy enters your eye per second? (Assume that 5.0% of the lightbulb's power is converted to light.).

b. Repeat part A for the case of a 1.0mm--diameter laser beam with a power of 0.50.

Reference no: EM13516330

Questions Cloud

Compute the cost of oil shipped in the pipeline : The production supervisor estimates that the ending work in process is 70 percent complete on May 31. Compute the cost of oil shipped in the pipeline and the amount in work-in-process ending inventory as of May 31.

What is the focal length of the concave lens : A convex lens with f1= 19.9 is mounted 40.0cm to the left of a concave lens. When an object is placed 30.8cm to the left of the convex lens, What is the focal length of the concave lens

Compute the volume of both solutions needed to buffer : A buffer is created by mixing equal concentration is NH4+ and NH3. Calculate the volume of both solutions needed to create a buffer of pH = 8.75 with a total volume of 100ml

Find where should the fulcrum be so meterstick is balanced : A meterstick of negligible mass has a 0.25 kg mass at its 31 cm mark and a 0.40 kg mass at the 77 cm mark. Where should the fulcrum be so the meterstick is balanced

Determine how much energy enters your eye per second : You are standing 1.9m from a 130W- lightbulb. If the pupil of your eye is a circle 5.0mm in diameter, how much energy enters your eye per second

Explain what is the pka of this weak acid : A 25.00 mL sample of a .1028 M monoprotic weak acid solution has a pH of 3.48 after the addition of 12.45 mL of .1106M NaOH. What is the pka of this weak acid

Explain the solubility of pbcl2 in a 0.15 m solution of hcl : What is the solubility (in M) of PbCl2 in a 0.15 M solution of HCl. The Ksp of PbCl2 is 1.6 x 10^-5

Find how much work was done to accelerate the blade : An electric trimmer blade has rotational inertia 1.85×10^-4 kg*m^2. How much work was done to accelerate the blade

Find the balls speed at the bottom of the ramp : A 1.15 m long ramp is inclined at 19 degrees to the horizontal. A solid ball is released from rest at the top of the ramp. Find the ball's speed at the bottom of the ramp

User Account

All Pages