Thanks. Another question though. How would you find the distance in which an object can be seen clearly from by just using the number 2.5 (and possible 2.1 and 2.3)?
Homework Statement
The diagram shows the eye of a person with normal vision looking at an object that is very far away.
a) Determine the focal length of this persons eye.
b) Later in this person's life, the focal length will change to between 2.1 cm and 2.3 cm. Will this person suffer from...
Homework Statement
The index of refraction for a diamond for red light, 656 nm, is 2.410, while that for blue light, 434 nm, is 2.450. Suppose white light is incident on the diamond at 30.0 degrees. Find the angles of refraction for these two colors.
Homework Equations
n1sinangle of...
Homework Statement
Ole Roemer found that the maximum increased delay in the appearance of Io (a moon of Jupiter, I believe) from one orbit to the next was 14 seconds.
a) How far does light travel in 14 seconds?
b) Each orbit of Io is 42.5 h. Earth traveled the distance calculated above...
Homework Statement
The wave speed in a guitar string is 265 m/s. The length of the string is 63 cm. You pluck the center of the string by pulling it up and letting go. Pulses move in both directions and are reflected off the ends of the string.
a) How long does it take for the pulse to...
I got the falling part time to be 5 seconds.
And for the time for the sound to return, how do I figure that out? If the velocity for the sound is wavelength x frequency which I have only the wavelength, how can I find the time?
Homework Statement
1. Water waves in a lake travel 4.4m in 1.8s. The period of oscillation is 1.2 s.
a) What is the speed of the water waves?
b) What is the period of the water waves?
2. A group of swimmers is resting in the sun on an off-shore raft. They estimate that 2.0m separates...
Homework Statement
Someone drops a stone into a mine shaft 122.5 m deep. How soon after she drops the stone does she hear it hit the bottom of the shaft?
Homework Equations
v= wavelength x frequency
The Attempt at a Solution
I changed the equation to be:
d/t=wf
t=d/wf...
Homework Statement
A pendulum with is 2.00 m long makes 84.5 complete oscillations in 4.00 minutes. What is the acceleration of gravity at that spot?
Homework Equations
TG=(4pi^2/T^2)L
The Attempt at a Solution
g=(4pi^2/240s^2)2.00m
g= 0.0013707...
Which doesn't make...
The link wouldn't load for me,(apparently the The network link was interrupted while negotiating a connection. Please try again.) but it did inspire the idea of space being like a vacuum, and that sound cannot travel in it, so the explosion due to sound wouldn't happen. Thanks :)
Homework Statement
In a science fiction movie, when a spaceship explodes, the vibrations from the sound nearly destroy a nearby spaceship. If you were the science consultant for the movie, what would your advice be for the producer?
Homework Equations
I don't think there are any...