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The distance to the nearest large spiral galaxy called Andromeda is 2.4 x 1022 m. How long does it take light to travel from us to Andromeda? Note that the speed of light is 3 x 108 m/s.
A cord of length 1.3 m is fixed at both ends. Its mass per unit length is 1.1 g/m and the tension is 11 N. (a) What is the frequency of the fundamental oscillation? Hz (b) What tension is required if the n = 3 mode has a frequency of 0.60 kHz? N
Tom and Mary are riding a merry-go-round. Tom is on a horse about half way between the center and the outer rim, Which child has the larger angular speed
a hardworking ant must supply 0.00805 n to pull a small piece of fruit at constant velocity over a distance of 8.20 cm
A cat is brought into a vets office you need to find itscenter of gravity. what is the total weight of the cat
A long string is moved up and down with simple harmonic motion with a frequency of 42 Hertz. Determine how long would the string need to be to find the second harmonic standing wave
Sailors use a technique called "hiking out". What purposedoes positioning themselves in this way serve? If the wind werestronger, what would they need to do to keep their craftstable?
A 5,20 g bullet moving at 672 m/s strikes a 700 g wooden block at rest on a frictionless surface. What is the speed of the bullet-block center of mass
A net force of 7 newtons acts on an object that weighs 49 newtons. What is the resulting acceleration
You have four identical resistors, each with a resistance R. You are asked to connect these four together so that the equivalent resistance of the resulting combination is R. How many ways can you do it
An astronomical telescope uses an eyepiece of power +80.000 D. what is the magnification of the telescope
A researcher notices that the frequency of a note is emitted by a car horn appears to drop from 284 Hz to 266 Hz as the car passes him. What value does he obtain for the speed of the car
A refractive index (n) is 1.5 and the radius of curvature (R) is .6m. What it is the appropriate equation to calculate the focal length (f) of the lens.
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