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While on a geologic expedition, you unearth a large, dark stone with an excellent print of a fossil embedded within the rock. Because of the dark color, your friend automatically assumes that it is an igneous rock. Explain why it is uncommon to find fossils in igneous rock. In what kind of rock are most fossils found?
A radio with a resistance of 40 ohms and a clock with a resistance of 20 ohms are connected in series on a 120V, What is each power supplied to the circuit in the parallel case, How much power is dissipated by each componant
when a mass of 180g is attached to a vertical to a vertical spring and lowered to its equilibrium position, it is found that the spring extends 12cm. what is the period of the resulting oscillations
Prove that any ray coming in parallel to the principal axis of a parabolic surface will reflect towards the focal point of the parabola. Start with the general form of a parabola centered on y axis: y = a x^2. Give the distance of the focal point fro..
A neon sign requires 10000 V for its operation. It operates from a 220 V receptacle. What must be the turns ratio Ns/Np of the transformer
A concave mirror is broken into two parts and these parts are separated by a distance if 1 cm.The focal length of the mirror is 10 cm. Find the location of images(in cm),formed by the 2 parts of the mirror. The object is midway between the two pr..
Hydrogen atoms in highly excited states with a quantum number as large as n=732 have been detected in interstellar space by radio astronomers. what is the orbital radius of the electron in such an atom? what is the energy of the electron?
A basketball player grabbing a rebound jumps 70 cm vertically. How much total time (ascent and descent) does the player spend (a) in the top 11.9 cm of this jump and (b) in the bottom 11.9 cm.
question1a 1.35 kg block is attached to a spring with spring constant 15.0 nm. though the block is sitting at rest a
Some asteroid fragments are large enough to not completely burn up in the atmosphere and they end up on the surface of the Earth. how could you determine which type of radiation was being emitted
An old-style TV set places 50 kV across two plates of a parallel plate capacitor. An electron is released very close to one plate, find the speed of the electron when it exits the hole in the plate
A mass on a string of unknown length oscillates as a pendulum with a period of 6 s. What is the period in the following situations, determine The mass is doubled
A spring-mass system is initially at rest is shown above. A mass m = 1.0 kg traveling at 12ms collides and sticks to the mass that is attached to the spring. Suppose k = 1000N m and M = 3.0 kg. Calculate the speed of the two masses immediately afte..
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