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Q. As you sit facing your computer screen, electrons are directed from a source at the back of the computer toward you and are deflected by a magnetic field. Which direction must the magnetic field be oriented in order to direct the electrons to the bottom of the screen?
Q. After a tornado, a 0.50 straw was found embedded 3.0 into the trunk of a tree.If the average force exerted on the straw by the tree was 85 , what was the speed of the straw when it hit the tree?
How fast is the roller coaster moving at the top of the loop
A jet is flying horizontally. when the plane is directly overhead at B, A person on the ground hears the sound coming from A. the average temperature of the air is 20 degrees celcius. if the speed of the plane at A is164 meters per second, what is..
A 79.0 kg man is riding in a shopping mall. The escalator moves the man at constant velocity from ground level to the floor above, the vertical height of 4.40m.What is the work completed on the man by the gravitational force and the escalator.
A container of hot water at 50 degrees cools to 49 degrees in how many seconds when it is placed in a room that is t 20 degrees. use newton's law of cooling to find the time it will take for the container to cool from 50 degrees to 49 degrees.
What is the electric field strength at midpoint between two disks.What is the electric field strength a point on axis 5.0 cm from one disk between them.
Light of wavelength 588 nm falls on a double slit. First-order bright bands appear 3.65 cm from the central bright band. The screen is 1.20 m from the slits. How far apart are the slits.
A 95-{rm m}-long train begins uniform acceleration from rest. The front of the train has a speed of 25 {rm m/s} when it passes a railway worker who is standing 120m from where the front of the train started. What would be the speed of last car as ..
A 3.00-g copper penny at 25.0 C drops 50.0 m to the ground. (a) If 60 percent of the initial potential energy of the coin earth system goes increasing internal energy of the coin determine the coin's final temperature (b) does the result depends on m..
A cord of length 1.0m is fixed at both ends. Its mass per unit length is 1.2g/m and the tension is 11N. What is the frequency of fundamental oscillation
An ideal monatomic gas at first has a temperature of 311K and a pressure of 7.57atm. It is to expand from volume 571 cm3 to volume 1390 cm3.
An insulated Thermos contains 131 cm3 of hot coffee at 82 °C. You put a 12g ice cube at its melting point to cool the coffee. By how many degrees has the coffee cooled once the ice has melted and equilibrium is reached? Treat the coffee as though ..
An airplane must reach a speed of 172 mi/h to take off. If the runway is 470 m long, what is the minimum value of the acceleration that would allow the airplane to take off productively.
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