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(a) What is the magnitude of the attractive force that Bob feels from Stacy? (b) The magnitude of Stacy's charge is twice as much as Bob's. What is the magnitude of Bob's charge?
An electric vehicle starts from rest and accelerates at a rate of 2.3 m/s2 in a straight line until it reaches a speed of 16 m/s. The vehicle then slows at a constant rate of 1.1 m/s2 until it stops
The roller-coaster car is dragged up at the highest point where it is released passing the highest point with speed of 1.7 m/s. If the average force of friction is equal to one-fifth of its weight,
If the first one has a charge of 10 µC, find (a) the most negative possible charge and (b) the most positive possible charge for the other garbage can. Assume that the charges can be represent
A microwave oven generates a sound level of 37.3 dB when consuming 1.6 kW of power. Estimate the fraction of this power that is converted into the energy of sound waves. Assume the dimensions of the
The decibel level of the noise from a jet aircraft is 130 dB when measured 19.8 m from the aircraft. How much sound power would strike the eardrum of an airport worker 19.8 m from the aircraft? (Ass
At what distance is the music just barely audible to a person with a normal threshold of hearing? Disregard absorption.
Assuming each of the remaining pigs squeal at their original level after 73 of their companion have been removed, what is the decibel level of the remaining pigs?
A sinusoidal sound wave is described by the displacement s(x,t) = sm cos(kx - ωt), where sm = 4.89 μm, k = 12.4 rad/m, and ω = 875 rad/s. Determine the maximum speed of the molecules'
A nine-volt battery has two terminals that are 1.0 cm apart. The space between them is filled by air. How much charge flows between the two terminals in 1.0 minutes?
There is no buildup of charge inside the box. After 10 seconds has elapsed, how much charge has flowed out of the box through the blue wire?
If the dart was at the same height as the bull's eye when it was released, how long did it take the dart to strike the dart board?
A cloud that is about to unleash a lightning bolt has a charge of +24 coulombs. In stormy weather, powerful updrafts of air carry electrons from one place in the storm system to another. If the clou
An initially neutral ball bearing is hooked up to a machine that transfers electrons onto it. Afterwards, the ball bearing is analyzed and its charge is -2.81×10-9 C. Find the mass increase du
There are two charges: q1 = +0.00010C and q2 = -0.00010C, both located on the x axis, at (-0.10m, 0.00m) (notation: x position, y position) and (+0.10m, 0.00m) respectively. What is the direction of
A rod of mass M and length L ( L = 3m) is pivoted on a frictionless hinge at the end. The rod is held at rest horizontally and then released. Determine the speed of the rod's tip at this moment. (Ic
A certain vibrating string on a piano has a length of 74cm and forms a standing wave having two antinodes. A) which harmonic does this wave represent? B) determine the wavelength of this wave. C) ho
A mercury barometer reads 749.0 mm on the roof of a building and 764 mm on the ground. Assuming a constant value of 1.29 kg/m3 for the density of air, determine the height of the building.
However, the units of this scale are the same as those on the fahrenheit scale rather than the celsius scale, what is the numerical value of the triple-point temperature of water on the rankine scal
If the rails are originally laid in contact. what is the stress in them on a summer day when their temperature is 33 degrees celsius?
How many space must be left between adjacent rails if they are just to touch on a summer day when their temperature is 33degrees celsius?
You pull a simple pendulum of length 0.240m to the side through an angle of 3.50degree and release it. a.) how much time does it take the pendulum bob to reach its highest speed? b.) how much time d
A Styrofoam cup holding 110 g of hot water at 88°C cools to room temperature, 23.0°C. What is the change in entropy of the room? Neglect the specific heat of the cup and any change in temper
A wrecking ball is hanging at rest from a crane when suddenly the cable breaks. The time it takes for the ball to fall halfway to the ground is 1.3 s. Find the time it takes for the ball to fall fro
A whale swims due east for a distance of 6.0 km, turns around and goes due west for 4.0 km, and finally turns around again and heads 4.9 km due east. (a) What is the total distance traveled by the w