Physics

The terminal velocity of a 3 10^-5 raindrop is about 9 m/s. Assuming a drag force Fd = bv, determine (a) the value of the constant b and (b) the time required for such a drop, starting from rest, to reach 63% of terminal velocity.
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Topic : Heat1. Why can anyone put their fingers beside the flame of a lit candle without getting burned, but not above the flame?2. What is the purpose of putting holes near the top of a metal lampshade?3. A metal spoon is placed in one of two identical cups of hot coffee. Which cup will be cooler after a few minutes?
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A 120 N accelerates an object 1. 2 m/s? What is the mass of the object?
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Pls help with physics.Question: How does kicking a soccer ball relate to newton's third law?Thank you!
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Martha wants to calculate an object's velocity. What will she need to do?
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The physical meaning of 220 volts
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Helppppp 5) Experimental Design Cavendish's homemade apparatus gave him a calculatedvalue for the Gravitational Constant of 6.74E-11 Nm/kg? The accepted value today(with 200 years more advanced technology) is 6.67E-11 Nm/kg? What sources oferror might Cavendish have had? How might scientists have improved thisexperiment over the years.
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Two identical twins, Sallie and Serena, are playing one December on a large merry-go-round (a disk mounted parallel to the ground on a vertical axle through its center) in their school playground in northern Minnesota. Each twin has a mass of 30.9 kg. The icy coating on the merry-go-round surface makes it frictionless. The merry-go-round revolves at a constant rate as the twins ride on it. Sallie, sitting a distance 1.85 m from the center of the merry-go-round, must hold on to one of the metal posts attached to the merry-go-round with a horizontal force of 59.0 N to keep from sliding off. Serena is sitting at the edge, a distance of 3.64 m m from the center; Serena must also hold on to a metal post on the merry-go-round to keep from sliding off.Required:What is the ratio of Serena?s speed to Sallie's speed (both speeds are measured by a stationary observer watching the spinnning merry-go-round)?
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Matthew drops a cherry pit out the car window 1.0m above the ground while traveling down the road at 18m/s.a) How far, horizontally, from the initial dropping point, will the pit hit the groundb) Draw a picture of the situation. c) If the car continues to travel at the same speed, where will the car be inrelation to the pit when it lands?
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Where is the electric field between a charged balloon and a charged piece of paper 0.04 m away? A. The electric field is in the region around the balloon and paper where there are outside charges that affect them. B. The electric field is in the 0.04 m distance between the balloon and paper and not anywhere else around either the paper or the balloon. C. The electric field is all around the balloon and paper including between them, where, depending on their charge, there would be a force of either attraction or repulsion. D. The electric field is in the region in which the forces come in contact.
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what happens when you put foil in the microwave?
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3 Select the correct answer. Which of the following statements is TRUE? . Children in the US are generally given the opportunity to play sports in school starting at a young age. B. The US is one of the few countries to integrate sports into their school systems.C. Most high schools and colleges in the US have various sport teams. D. All of the above
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Different Betweens in Current Source And Voltage Source.[tex] \\ \\ \\ \\ \\ \\ \\ [/tex]Thanks:')
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What is the ultimate fate of an isolated white dwarf?.
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Why did astronomers suspect an eighth planet beyond uranus? how did they determine where to look for it? construct the correct explanation.drag the terms on the left to the appropriate blanks on the right to complete the sentences.brightness - mass - orbit - position - kepler's third law - value - law of gravityobservation of uranus showed small but significant discrepancy between its predicted ______ and its actual ________ , which could mean that another object perturbed its motion.in the mid-1800s, astronomers used the ________ to predict where a planet would have to be.
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A wave oscillates 4.0 times a second and has a wavelength of 3.0 m.What are the (a) frequency, (b) period, and (c) speed of this wave?
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yeah help me with this one too i have no clue
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What are the conditions necessary for a terrestrial planet to have a strong magnetic field?.
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Two people are having a race pushing equal sized boxes up a hill. joe pushes the box up the hill in 10 seconds and cindy pushes the box up the hill in 5 seconds. who is applying more pressure on the side of the box?
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Plant and animal cells are both eukaryotic cells that share many organelles and cell structures in common. However, each have unique organelles that perform specific functions in each cell type. Examine each of the lists of cell structures. Which of these are found in plant cells? Select ALL that apply.A) nucleus, ribosomes, and chloroplasts B) mitochondria, cell wall, chloroplastsC) nucleus, mitochondria, and centrioles D) cell membrane, ribosomes, small vacuoles E) cell wall, central vacuole, and cell membrane
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What current is required in the windings of a long solenoid that has 1580 turns uniformly distributed over a length of 0.44 m in order to produce a magnetic field of magnitude 0.000394 T at the center of the solenoid
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what property of light is suggested by the formation of shadows
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Help, please Any _____ generates an electric field around itself. This electric field will apply a _____ on any charge in its field. These fields are often represented by electric ______. The diagram represents the electric field lines are two charges. These field lines go away from _____ charges and toward _____ charges. The direction of an electric field is defined as the direction a small positive test charge would move in the field. All charges create electric fields and are ______ by the electric field of other charges. Like charges ______ each other and unlike ______ charges each other.
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How do we use information from earths climate change data in order to engineer soulutions that reduce carbon emissions and impact of human activities?
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