Physics

How long it took for the Moon to revolve once around Earth and how long it took for the Moon to rotate once on its axis?
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what spectral features allow you to differentiate the product from the starting material? (see last page of lab handout)
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a spring has a natural length of 1 meter. if 10 j of work is required to stretch the spring from a length of 1 meter to a length of 1.1 meters, then how much work is required to strech the spring an additional 0.1 meters?
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A 500 lb steel beam is lifted up by a crane to a height of 100 ft and is held there. (a) How much work is being done to hold the beam in place? - More than 5000 lb-ft - 5000 lb- ft - No work is done to hold it in place - Less than 5000 lb-f (b) How much work was done to lift the beam?(c) How much work would it take if the steel beam were raised from 100 ft to 200 ft?
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the cord on a power tool you are planning to use has a split in the cord jacket but the insulated conductor inside appears to be undamaged. you should
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I need help with this question
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calculate the centripetal acceleration, in m/s2, at the tip of a 3.50-meter-long helicopter blade that rotates at 300 rev/min.
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does the propagation speed of the transmitted wave depend on the propagation speed of the incident wave
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q101 is a local radio station operating at 101.7 mhz. a. what is the wavelength of their radio waves?
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Part 1: A cello string vibrates in its fundamental mode with a frequency of 303 1/s. The vibrating segment is 42.7 cm long and has a mass of 1.04 g. Find the tension in the string. Answer in units of N.Part 2: Find the frequency of the string when it vibrates in two segments. Answer in units of 1/s.
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A 208g sample of sodium-24 decays to 13.0g of sodium-24 within 60.0 hours. What is the half life of this radioactivity isotope?
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a little aluminum boat with a mass of 14.5 g has a volume of 450 cm3 . the boat is placed in a small pool of water and carefully filled with pennies. if each penny has a mass of 2.5 g, what is the minimum number of pennies needed to make the boat sink?
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why does hydrogen, which is abundant in the sun's atmosphere, have relatively weak spectral lines, while calcium, which is not abundant, has very strong spectral lines? (assume the spectrum is observed on the surface of the earth.)
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how much work does an ideal battery with a 3.50 v do to an electron that passes through the battery from the positive to the negative terminal?
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what is the kinetic energy, in joules, of each ejected electron when light of 258.0 nm strikes the metal surface?
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a refrigerator with a cop of 3.0 accepts heat from the refrigerated space at a rate of 10 kw. determine the power consumed.
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if you place a positive test charge at the origin, would the test charge be at a point of stable equilibrium?
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In the sport of parasailing, a person is attached to a rope being pulled by a boat while hanging from a parachute-like sail. A rider is towed at a constant speed by a rope that is at an angle of 19 from horizontal. The tension in the rope is 1500 N. The force of the sail on the rider is 30 from horizontal
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star y appears much brighter than star z when viewed from earth, but is found to actually give off much less light. assign a set of possible values for the apparent and absolute magnitudes of these stars that would be consistent with the information given in the previous statement. explain your reasoning.
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Unknown Material AMass of metalMass of water50 g 100gTemp. Of Unknown90 deg * C2 * o deg * c 23. 5 deg * cTemp. Of WaterTemp at EquilibriumC of water4. 18H * g deg * CC meTAL = C wateR M waree Delta T water m neTAL Delta T metALC of unknown metal
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radio waves are diffracted by large objects such as buildings, whereas light is not noticeably diffracted. why is this?
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why the ocean near Christchurch is a different temperature than wed expect for its latitude
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a 5100-pound vehicle is driven at a speed of 30 miles per hour on a circular interchange of radius 100 feet. to keep the vehicle from skidding off course, what frictional force must the road surface exert on the tires?
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Blocks A (mass 3.50 kg) and B (mass 10.00 kg) move on a frictionless, horizontal surface. Initially, block B is at rest and block A is moving toward it at 9.00 m/s. The blocks are equipped with ideal spring bumpers. The collision is head-on, so all motion before and after the collision is along a straight line. Let +x be the direction of the initial motion of A. Find the maximum energy stored in the spring bumpers and the velocity of each block at the time of the collision
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