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What is the magnitude of the electric force of attraction between an iron nucleus (q=+26e) and its innermost electron if the distance between them is 1.5 x 10^-12m
A student has built a 20-cm-long pinhole camera for a science fair project. How far should she stand from the Washington Monument
Which of the following factors do not affect the pressure at the bottom of a cup? Explain answer a. Depth of the liquid b. Density of the liquid c. The value of the acceleration of gravity d. The shape of the cup
Charge Q = 10E-8 C is placed in the origin. Location A is -3.00m from the charge while location B is 2.00m from the charge. A) Find the potential difference VB - VA between the two points. B) Which point is at the higher potential? Type either "Po..
After the first spring compresses a distance of 32.1 cm, the second spring acts with the first to increase the force as additional compression occurs. The car comes to rest 47.0 cm after first contacting the two-spring system. Find the car's initi..
It is desired to cool iron parts from 500°F to 100°F by dropping them into water that is initially at 55°F. how many kilograms of water are needed per kilogram of iron
A 10-cm-long nichrome wire is connected across the terminals of a 1.5 V battery. What is the current density inside the wire
A vertical straight wire carrying an upward 30-A current excerts an attractive force per unit length of 8.0*10^-4 N/m on a a second paralled wire 7.0 cm away
It took 1 sec for 1000 coulombs of charge flows through a resistor in circuit. How much current flowed through the rsistor
A small piece of dust of mass m = 1.3 mu or micro g travels horizontally through an electric air cleaner in which the electric field is 478 N/C. What is the charge on the dust particle
a metal plate of mass (m=20kg) slides down a slope of height (h=10 meters) and angle (theta=30Â °). what is the magnitude of the work done by friction
A high-intensity desk lamp is rated at 75 W, but its bulb requires only 9 V. The lamp contains a transformer that converts 110 V household electricity. What is the resistance of the bulb when it is on
A model rocket is launched straight upward with an initial speed of 45.3 m/s. What is the maximum height reached by the rocket
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