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The normal human eye has maximum visual acuity with a pupil size of about 3 mm. For larger pupils, acuity decreases due to increasing aberrations; for smaller pupils, acuity decreases due to increasing effects of diffraction. If your pupil diameter is 2.0 mm, as it would be in fairly bright light, what is the smallest diameter circle that you can barely see as a circle, rather than just a dot, if the circle is at your near point, 24.7 cm from your eye? (Assume the light's wavelength in air is 593 nm and the index of refraction inside the eye is 1.33.)
a force of 40.0 n is required to start a 5.0-kg. box moving across a horizontal concrete floor.a what is the
The semiconducting compound CdTe is widely used for infrared light emmiting diodes (LEDs). find the frequency of light emitted by a CdTe LED
What friction torque is necessary to reduce its angular speed from 90.0 {rm rpm} to 45.0 {rm rpm} in a time interval of 32.0 {rm s}.
A ball with a mass of 29.0 g is on a short compressed spring. When aimed vertically and suddenly released, Calculate the horizontal distance the ball would travel
Time standards are now based on atomic clocks. A promising second standard is based on pulsars, what is the associated uncertainty
the mass of the planet neptune is 4.5x10power 26 kg . itsradius of orbit around the sun is 4.5x10power12m. calculate the potential energy of neptune
An observation satellite orbits the planet at a height of 1000 . What is the projectile's speed as it passes the satellite?
If each rock strikes the fixture travelling at 10.0 {rm m}/{rm s} horizontally and rebounds at 2.00 {rm m}/{rm s} backwards, how high above the lowest point does collision make your light fixture swing?
A box with a total surface area of 1.11 m2 and a wall thickness of 3.1 cm is made of an insulating material. A 12.9 W electric heater inside the box maintains the inside temperature at 16.3C above the outside temperature. Find the thermal conductivit..
The intensity of solar radiation at the top of the Earth's atmosphere is 1 272 W/m2. Assuming 60% of the incoming solar energy reaches the Earth's surface and you absorb 50% of the incident energy, find the amount of solar energy you absorb if you su..
Find a Compact Disk. find a white light source and see if you can convince yourself that you are looking at the reflection of the light source as seen in the first order m = 1 maxima, estimate the spacing between the tracks of a CD
A block of mass m = 0.2 kg, in simple harmonic motion, has an amplitude of 3.5 cm and a maximum speed of 70 cm/s. What is the potential energy of the system when the block is 2 cm away from the equilibrium position?
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