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A bat moving at 2.3 m/s is chasing a flying insect. The bat emits a 51 kHz chirp and receives back an echo at 51.33 kHz. At what speed is the bat gaining on its prey? Take the speed of sound in air to be 342 m/s.
Answer in units of m/s
Given that the goal is to allow all vehicles to come safely to a stop before reaching the intersection, calculate the maximum desired speed limit
A solenoid has a radius of 1.87 cm and 1080 turns per meter. Over a certain time interval the current varies with time according to the expression I = 2.91e0.2t, Calculate the electric field 4.54 cm from the axis of the solenoid
A point charge with charge is held stationary at the origin. How much work is done by the electrostatic force on the moving point charge
A capacitor is a device used in a variety of electronic circuits. In a simple design a capacitor consists of two parallel metal plates of area A separated by a distance d. When the plates are connected to the positive and negative terminals of a b..
A long, straight wire lies in the plane of a circular coil with a radius of 0.040 m. The wire carries a current of 5.0 A and is placed along a diameter of the coil. What is the net flux through the coil
A series RLC circuit has a resistance of 12 ohms and an impedance of 10 ohms, what average pewer is delieverd to circuit
A steel safe with mass 2200 kg falls onto concrete. Just before hitting the concrete its speed is 40 m/s, and it smashes without rebounding and ends up being 0.06 m shorter than before. What is an approximate magnitude of the force exerted on the ..
A compound microscope has an objective lens with a focal length of 2.0 cm and an eyepiece with a focal length of 5.9 cm. what magnification does this microscope produce
Communications satellites are placed in a circular orbit where they stay directly over a fixed point on the equator as the earth rotates. find the speed of a satellite in a geosynchronous orbit
A solar cell generates a potential difference of 0.0984 V when a 500 ? resistor is connected across it, What is the internal resistance of the solar cell
In Millikan's experiment, an oil drop of radius 2.407 µm and density 0.860 g/cm3 is suspended in chamber C when a downward-pointing electric field of 1.92 105 N/C is applied. Find the charge on the drop
In a diesel engine, the piston compresses air at 309 K to a volume that is 0.0621 of the original volume and a pressure that is 48.3 times the original pressure. What is the temperature of the air after the compression? K
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