Physics

Marks: 1What is the power of a light that uses 300 joules of energy in 60seconds?18,000 W50 W5 W0.2 W
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A section of a rollercoaster is shown below. If the 17,500 kg rollercoaster momentarily comes to rest at point A, where it is 19 m in the air, how fast is it going at point D?
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desventajas de la friccin cintica
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which of the following are ways in which energy can be transferred to or from a substance?a.) heat and internal energyb.) work and internal energyc.) heat and workd.) heat and kinetic energy
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A log has a density of. 8 g/cm. What will happen to this log in freshwater, which has a density of 1. 0 g/cm? It will sink. It will float. It will move deeper. It will decrease in density.
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As shown in the figure below, a uniform solid sphere rotates about a vertical support on a frictionless bearing. A light cord passes around the equator of the sphere, over a uniform solid disk, and is attached to a hanging mass. The sphere, disk and hanging mass all have equal mass M. The sphere and disk have the same radius R. Find the acceleration of the hanging mass if the string does not slip on the sphere or the disk. Express your answer in terms of M, R and g as needed...
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What is the sum of 130+125+191? A. 335. B. 456. C. 446. D. 426. If we minus 712 from 1500, how much do we get? A. 788. B. 778. C. 768. D. 758.50 times of 8 is equal to: A. 80. B. 400. C. 800. D. 4000. 110 divided by 10 is: A. 11. B. 10. C. 5. D. None of these. FRIEND ME!!!
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pls help me, its just fill in the blank
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help with this please
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During chemical reactions, bonds between atoms break and form. What does this mean in terms of subatomic particles? (1 point)O Electrical fields of charged particles interact, bonding those with the same charge.Electrical fields of neutral particles interact, bonding those with opposite charges.O Electrical fields of neutral particles interact, bonding those with the same charge.o Electrical fields of charged particles interact, bonding those with opposite charges
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A student takes the temperature of a bottle of liquid water and a tub filled with ice. The student then places the bottle of liquid water into the tub of ice. After 15 minutes, which of the following best describes what happens to the temperature of each?
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the distance between two charges q a and q b is r and the force between them is F. What is the force between them if the distance between them is doubled?
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A gas in a closed container is heated with 10J of energy, causing the lid of the container to rise 2m with 3N of force. What is the total change in energy of the system
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PLEASEE IS FOR A TEST!!!Which ionic compound is BOTH correctly written and named?? A mg0 magnesium oxide B Mn02 manganese oxideC N02 nitrogen oxide D SrBr strontium bromide
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The columns in the periodic table are called groups. What do the elements in group 18 have in common A. They are found only in compounds in natureB. They tend to form ions of a -1 Electric chargeC. They tend to form ions with a +1 electric chargeD. They rarely react with any other elements
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What is the relationship between momentum and speed?
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An object, initially at rest, moves 475 m in 19 s. What is its acceleration? *
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You illuminate the surface of some metal with green laser and observe the photocurrent. If you decrease the intensity of laser, the stopping potential will
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Word Bank:ElectricalMechanicalChemicalLightThermalSound
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A baseball player at practice is pushing a tackling dummy across the field. He initially has to push the 130 kg dummy with 600 Newtons of force to get it to start moving and maintain a force of 475 to keep it moving at a steady state. What are the coefficient of friction static and kinetic with the dummy on the ground .
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explain the difference between vector and scalar quantities
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Write any three facts in the support of molecular theory
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[tex] \huge \rm question [/tex]Calculus proof of second equation of motion ~
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A 20 metric ton train moves toward the south at 50 m/s. At what speed must it travel to have four times its original momentum
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