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A bat flying at 6.0m/s, chases a bug flying at 3.0m/s. The bat emits a sound frequency of 32kHz. What is the frequency of the echo (sound reflected by the bug back to the bat) that the bat can hear? The speed of sound I'd 343m/s.
What frequency should you set a wave driver to if you want to see the fundamental frequency if you have a 2.8 m total-length string, stretched over a support 1.2 m from the wave driver, and a 0.35 kg mass hanging off the end of the string? The string..
You are pulling a suitcase through an airport at a constant speed. The handle of the suitcase makes an angle of 60 degrees with respect to the horizontal direction, what is the contact force due to the floor acting on the suitcase
What is the resistance of a 1.2m -long copper wire that is 0.40mm in diameter? Please answer in (omega) What is the resistance of a 13cm -long piece of iron with a 1.5mm × 1.5mm square cross section?
When a .22-caliber rifle is fired, the expanding gas from the burning gunpowder creates a pressure behind the bullet. determine the average pressure of the expanding gas
Find out the magnitude and direction of the rockets acceleration. Give the direction as an angle above the horizonal.
What terminal voltage must an ideal battery( no significant internal resistance ) have to produce a 0.50A current through a 2.0 ohms resistor?
a small electric immersion heater is used to heat 100 g of water for a cup of herbal tea. the heater is labeled 200
A syringe has an area of 1.5 cm2 at its barrel and then narrows down to an area of 0.11 mm2 at the needle end. what is the force produced at the tip of the needle
An RL circuit is given below as a resistor and an inductor in series with a battery. When the switch is in position b for t
A train is approaching a highway crossing at a speed of 40 m/s. What frequency would the driver hear if the train stopped
A positive charge of 1.000 C is located in a uniform field of 9.50×104 N/C. A negative charge of -0.500 C is brought near enough to the positive charge that the attractive force among the charges just equals the force on the positive charge due to th..
an explorer is caught in a whiteout in which the snowfall is so thick that the ground cannot be distinguished from the
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