Master Physics with Fun Quizzes & Brain Teasers!

Grain is pouring into a silo to be stored for later use. Due tothe friction between pieces of grain as they rub against eachother during the pouring process, one piece of grain picks up acharge of E-4.2x 10 C and another piece of grain picks upa charge of 3.8 x 10-15 C. What is the electric force betweenthem if the pieces of grain are2.4 cm apart?
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which object would have magnetic domains like those shown in the image?
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Which part of the cell contains hereditary characteristics
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How high do you need to fall for it to be very very very fatal ???
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4. With respect to a mass of 1kg. (a) How much change in elevation must it undergo to change its potential energy by 1 kJ? (g=9.8 ms)
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2. A car starts from rest at constant acceleration of 2.0 m/s. At the same instant a truck travelling with a constant speed of 10 m/s overtakes and passes the car. (b) After what time will this happen?
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1. (a) What must the charge (sign and magnitude) of a particle of mass 1.43 g be for it to remain stationary when placed in a downward-directed electric field of magnitude 660 N/C? (b) What is the magnitude of an electric field in which the electric force on a proton is equal in magnitude to its weight? 1. ( a ) What must the charge ( sign and magnitude ) of a particle of mass 1.43 g be for it to remain stationary when placed in a downward - directed electric field of magnitude 660 N / C ? ( b ) What is the magnitude of an electric field in which the electric force on a proton is equal in magnitude to its weight ?
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Which element or molecule in the air is useful for freezing?A. Carbon dioxideB. Water vaporC. OxygenD. Nitrogen
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how long does it take for a bicycle traveling 7.0m/s to come to a stop if the brakes provide an acceleration of -3.5m/s?A. 2.0sB.10.5sC.7.0sD.3.5s
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Calculate the gravitational attraction between two objects which masses are: mass A: 2.5kg, mass B: 5kg. The distance between them is 250m.
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a cheetah goes from 0 m/s to 25 m/s in 2.5s. what is the cheetahs rate of acceleration? A. 10m/s2 B. 25m/s2 C. 0.10m/s2 D. 63m/s2
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What happens to digital signals sent wirelessly over long distances?
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is glass a substance homogeneous mixture or heterogeneous mixture?
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A mass of (200 g) of hot water at (75.0C) is mixed with cold water of mass M at (5.0C). The final temperature of the mixture is (25.0C). What is the mass of the cold water (M)?
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In which direction does the electric field point at a position directly west of anegative charge?A. NorthB. WestO C. EastO D. South
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Write an expression for the average velocity of an object in the x direction. (Use the following as necessary: x for the displacement of the object during a time interval, and At for the time interval)
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I'm writing a story about Granny using old-fashioned laundry bluing to freshen dingy yellow clothes. I would like to explain WHY the blue overpowered the yellow to reflect/produce white (at least the appearance of white to the human eye). Blue and yellow are complementary colors that combine to reflect white, but I need a better way of describing the process in sentences.
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Before hoop skirts, women who wanted their gowns to feature large skirts wore many heavy layers of a material called crinoline, which was made from thread and what other material?.
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What is the voltage in a circuit that has a current of 10.0 amps and a resistance of 28.5 ohms?A. 2.85 voltsB. 285 voltsC. 0.35 voltsD. 18.5 volts
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6. How much voltage would be necessary to generate 100.5 amps of current in a circuit thathas 5.7 ohms of resistance?
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Two balloons having the same charge of 1.2 10-6 coulombs each are kept 5.0 10-1 meters apart. What is the magnitude of the repulsive force between them? (k = 9.0 109 newtonmeter2/coulombs2)A. 1.2 10-2 newtonsB. 3.2 10-3 newtonsC. 6.5 10-3 newtonsD. 3.0 10-4 newtonsE. 5.2 10-2 newtons
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Upon seizing a fake id, the alcohol establishment must give the fake id to local law enforcement authorities within.
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What type of cloud is made up of both liquid water droplets & ice crystals
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A current carrying wire is placed in a permanent magnetic field as shown in the diagram below. Determine the direction of the force that the wire experiences.
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