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A retarding force is applied to a body moving in a straight line so that, during an interval of its motion, its speed v decreases with increased position coordinate s according to the relation v2 = k/s, where k is a constant. If the body has a forward speed of 3.2 in./sec and its position coordinate is 8.1 in. at time t = 0, determine the speed v at t = 4.1 sec
The wave function for a wave on a taut string is y(x, t) = 0.335 sin(9?t ? 3?x + ?/4) where x and y are in meters and t is in seconds. What is the energy contained in each cycle of the wave
A heat pump has a coefficient of performance of 3.75 and operates with a power consumption of 7.13 103 W. How much energy does it deliver into a home during 24 h of continuous operation? How much energy does it extract from the outside air?
Two identical objects each hold a net charge of q = 9e. If the gravitational force between the two objects exactly cancels the electrostatic force between the objects, what is the mass of each object
Take the largest image distance and calculate the focal length of the lens used. image distance = 226 mm object distance =100 mm focal length = ??? How do you find the focal length
The pressure in a traveling sound wave is given by: ?p = (1.6 Pa) sin ?[(1.30 m-1)x - (375 s-1)t]. What is the pressure amplitude
A solenoid with a cross-sectional area of 1.70*10^-3 is 0.735m long and has 485 turns per meter. Find the magnitude of induced emf in this solenoid
A 12.0 V battery is connected inseries with a resistor and an inductor. The series circuit has atime constant of 597 µs, and themaximum current is 302 mA. What is thevalue of the inductance
The electric field within the membrane separating the inside and outside of a biological cell is approximately 7.8MV/m, what is the potential difference across the membrane
A river has a steady speed of 0.42m/s. A student swims upstream a distance of 1 km and swims back to the starting point. If the student can swim at a speed of 1.25 m/s in still water, how long does the trip take.
A cylindrical container 1.3 tall contains mercury to a certain depth, d. The rest of the cylinder is filled with water. what is the depth d
An atom is ionized so that it has only one electron. When the electron drops from the n = 3 shell to the n = 1 shell, What is the atomic number
An iron bar of mass, 0.5 kg, slides down a frictionless incline 0.32 m high. What is the speed of the combined masses after collision
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