Master Physics with Fun Quizzes & Brain Teasers!

If i took physical science in 7thgrade do i get credit for physics
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Which of the following is a chemical property?ReactivityPhase at room temperature (Solid, liquid, or gas)Electrical conductivityLuster (shininess)
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A coal barge with a mass of 2.36 10^4 kg drifts along a river. When it passes under a coal hopper, it is loaded with 9.4 10^3 kg of coal. What is the speed of the unloaded barge if the barge after loading has a speed of 2.7 m/s?
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1.Suppose you place m items in a hash table with an array size of s. What is the correct formula for the load factor?A. s + mB. s - mC. m - sD. m * sE. m / s
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ome telephoto cameras use a mirror rather than a lens to magnify distant objects.T/F
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suppose that v1x and v2x have equal magnitudes. also, v1 is directed to the right and v2 is directed to the left. the velocity of the center of mass is then:
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if electrons did not have spin (intrinsic angular momentum), how many elements would occupy the second row in the periodic table?
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Green light of wavelength 540 nm is incident on two slits that are separated by 0.50 mm.1) Determine the angles of the first two maxima of the interference pattern (not including the central band).2) What can you change (keeping the other parameters constant) in order to double the distance between the 0th order and the first order maximum on the screen? (CHOOSE ALL THAT APPLY)
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what is the alkalinity of exhibit water in mg/l caco3 if a 25 ml sample required 10.66 ml of 0.015 m hydrochloric acid titrant to reach the endpoint
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write down the equation for the orbital angular momentum. express your answer in terms of some, all, or none of the variables ml , l , n , s , and constant .
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write an equation for the width of the box in terms of e, , the reduced planck constant , and the mass of an electron me.
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what is the angular momentum of a 0.450 kgkg ball rotating on the end of a thin string in a circle of radius 1.50 mm at an angular speed of 12.8 rad/srad/s ?
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if x is measured in meters and f(x) is measured in newtons, what are the units for 1000f(x)dx? a. newton/meter b. meter c. newton d. newton-meter
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a 10,000 n vehicle is stalled one-quarter the way across a bridge. calculate the additional reaction forces that are supplied at the supports on both ends of the bridge.
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Which of the following energy sources has the lowest net energy yield?Group of answer choicesCoalNatural gasHydroelectric powerOil shale rockCrude oil
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the mean time period of a simple pendulum is 1.92 s. mean absolute error in the time period is 0.05 s. to express the maximum estimate of error, the time period should be written
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true/false. the greater ability to conduct current the higher of the battery
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our boat is moving at a speed of 15 miles per hour at an angle of 25 upstream on a river flowing at 4 miles per hour as illustrated in the figure to the right. a) Find the vector representing your boat's velocity relative to the ground. Express the vector is terms of i and j.
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a charge of 4.00 10-6 c is located 21 cm from a charge of -4.00 10-6 c. what is the magnitude of the force exerted on each charge?
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The surface of the exit road is horizontal, not banked. (See figure.) If the staticfriction between the tires and the surface of the road is us = 0.688 and themaximum speed with which the car can exit the highway safely without sliding is25.2 m/s, what is the radius of curvature of a highway exit, r?
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The length of a rectangle storage room is 8 feet longer than its width. If the area of the room is 240 ft. feet, find the width and length of the room
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Assume that if the shear stress in steel exceeds about 4.00 108 N/m2, the steel ruptures.(a) Determine the shearing force necessary to shear a steel bolt 1.50 cm in diameter in Newtons.(b) Determine the shearing force necessary to punch a 1.75-cm-diameter hole in a steel plate 0.550 cm thick. In Newtons.
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what is the momentum of a toy car traveling at 9.46m/s if it has a mass of 3.68kg
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what is the benefit of a fluorescent analyte with higher quantum yield? group of answer choices A. larger stokes shift B. higher absorbance C. higher sensitivity fluorescence at longer wavelength
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