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Question1
A uniform electric field of magnitude 642 N/C exists between two parallel plates that are 4.06 cm apart. A proton is free from rest at the positive plate at the same instant an electron is released from rest at the negative plate.
(a) Find the distance from the positive plate at which the two pass each other. Overlook the electrical attraction between the proton and electron.
(b) Repeat part (a) for a sodium ion (Na+) and a chloride ion (Cl-).
Question2
Sodium ions (Na+) move at 0.865 m/s through a bloodstream in an arm of a person standing near a large magnet. The magnetic field has strength of 0.255 T and makes an angle of 30.0° with the motion of the sodium ions. The arm contains 150 cm3 of blood with a concentration of 2.50×1020 Na+ ions per cubic centimetre. If no other ions were present in arm, what would be magnetic force on the arm?
If 40 g of hot water at 80°C is poured into a cavity in a very large block of ice at 0°C, what will be the final temperature of the water in the cavity? Explain how much ice must melt in order to cool the hot water down to this temperature?
A silicon rod (at 30 degrees celsius) with a uniform cross section connects to a battery with 9 Volts of terminal voltage and .50 A current flows. what is new resistance of rod
a motor applies a constant tension of 2.5 kN to a cable passing over a pulley, find the work done by gravitaional force action on the crate
A convex lens with f1= 20.3cm is mounted 39.5cm to the left of a concave lens. When an object is placed 29.4cm to the left of the convex lens, What is the focal length f2 of the concave lens
Consider a regular hexagon of side length, L=10cm. A charge, Q=2uc, is located at each vertex(there are 6). find the electostatic potential at the center of the hexagon
What is the size of the smallest vertical plane mirror in which a 10 tall giraffe standing erect can see her full-length image? (Hint: Locate the image by drawing a number of rays from giraffe's body that reflect off the mirror and go to her eye.
A microscope has an objective that has a focal length equal to 6.6 mm. what is the laternal magnification of the objective
Two moles of an ideal monoatomic gas undergo a cyclic process starting from state A at a vol. of 1L and a pressure of 2 atm. Find the total work done by the gas in one cycle
Two sheets of polarizing material are placed with their transmission axes at right angle to one another. What is the intensity of the transmitted light when the middle sheet is removed
What is the velocity of observer B relative to observer A . A diver shines a light up to surface of a flat glass-bottomed boat at an angle of 36 relative to the normal.
A 4.40 kg block is pushed along a floor by a constant applied force that is horizontal and has a magnitude of 40.0 N. it gives the block's speed v versus time t as the block moves along an x axis on the floor. The scale of its vertical axis is set by..
In the days of horse-drawn wagons, iron tires used to be placed on wooden wagon wheels by heating the iron rims, what diameter will the tire have when it is heated to 680 oC
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