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a person scuffing her feet on a wool rug on a dry day accumulates anet charge of -46.6 microcoulombs. How many excess electrons does this person get?
In a local bar, a customer slides an empty beer mug down the counter for a refill. What was the direction of the mug's velocity just before it hit the floor
A person pushes a 19.7-kg shopping cart at a constant velocity for a distance of 21.3 m on a flat horizontal surface. What is the magnitude of the force that the shopper exerts
A 1.4kg block and a 2.7kg block are attached to opposite ends of a light rope. what is the acceleration of the lighter block
An infinitely long line of charge has a linear charge density of 4.50×10^?12 C/m. How close does the proton get to the line of charge
How various revolutions per minute would a 21 -diameter Ferris wheel need to make for the passengers to feel "weightless" at the topmost point.
When the lights of an automobile are switched on, an ammeter in series with them reads 10.20 A and a voltmeter connected across them reads 12.10 V. What is the current through the starting motor
A box (m1=1.2 kg) is being pulled up an (not necessarily frictionless) incline by another mass (m2=0.85 kg), which is descending straight down. How much energy did the hanging mass lose
An 18-year-old runner can complete a 10.0 km course with an average speed of 4.38 m/s. A 50-year-old runner can cover the same distance with an average speed of 3.88 m/s. How much later (in seconds) should the younger runner start in order to fini..
In an X-ray scattering measurement the first order diffraction peak is observed at ? = 16.5°. What is the angle of the third order peak
A 690-kg elevator starts from rest and moves upward for 3.50 s with constant acceleration until it reaches its cruising speed, 1.85 m/s. What is the average power of the elevator motor during this period
one mole of a monatomic ideal gas is in a fixed volume container and is in thermodynamic equilibrium with its
An inductor that has an inductance of 15.0 H and resistance of 30.0 W is connected across a 100-V battery. Calculate the rate of increase of the current
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