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A bicycle wheel with radius 35 cm has 73 charges (1.0 µC each) spaced at regular intervals along its edge. A flea with charge -0.010 µC lands in the center of the wheel. (a) What is the net electric force on the flea? (b) One of the charges is removed. Find the magnitude of the new net electric force on the flea.
A certain freely falling object requires 1.7s to travel the last 40m before it hits the ground. From what height above ground did it fall.
the drawings show three charges that have the same magnitude but may have different signs. in all cases the distance d
Find out the change in entropy of the system
A picture is supported by two cords each making an angle of 53degree with the horizontal. If the tension in each cord is 10N what is the weight of the picture
A monochromatic light source emits a wavelength of 490 nm in air. When passing through a liquid, What is the liquid's index of refraction
I put a material on top of it, and it only took one rotation--or crank--to knock the material off from the machine and onto the ground.
The speed of light is 1.10 times as large in material A than in material B. Determine the ratio na/nb of the refractive indices of these materials
When a 5.5 cm long pencil is arranged perpendicular to a convex mirror's optical axis at a distance of 29 cm from the mirror, its image is 2.8 cm tall. (a) What is the mirror's focal length? (b) How tall is the pencil's image if the pencil is move..
question1 two boxes of equal mass m are placed one on top of each other. in case 1 an applied force acts on box b while
A rocket for use in deep space is to be capable of boosting a total load (payload plus the rocket frame and engine) of 3.15 metric tons to a speed of 10 000 m/s. How much fuel plus oxidizer is required
A variable capacitor is connected to a battery of voltage V. The capacitor initially has a capacitance C0 and charge q0. Calculate the power supplied by the battery
Suppose a light bulb is rated for a voltage of 1.8 V. At this voltage is draws a current of 0.054A, Using Ohm's Law, determine the resistance of the bulb
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