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A bat moving with a speed of 4.10 m/s and emitting sound of 31.0 kHz approaches a moth at rest on a tree trunk.
(a) What frequency is heard by the moth?
The volume control on a surround-sound amplifier is adjusted so the sound intensity level at the listening position increases from 23 to 61 dB
Does the growth of a plant or animal violate the second low.
A proton moves at constant velocity in the +y direction, by a region in which there is an electric field and a magnetic field. The electric field is in the +x direction, and has magnitude 700 V/m. The magnetic field is in -z direction, and has ma..
Gasoline's thermal expansion coefficient is 9.5 x 10^-4(degree C^-1). A truck's 110 gallon (416.4 L) gas tank is full on a 14 degree C summer morning. How much gasoline spills from the tank due to thermal expansion
0.45 kg of a metal at 90.°C is added to 0.40 kg of water at 20.0°C. If the final temperature of the mixture is 26.°C, what is the specific heat of the metal
When a 9.80 kg mass is placed on top of a vertical spring, the spring compresses 4.00 cm. What would the compression of the spring (in cm) be if the spring-mass system was placed
Helium neon laser light has a wavelength in air of 632.8 nm. What is the energy of a single photon in the beam
The magnetic field in a region of space is specified by its x, y, and z components which are respectively Bx = 0.138 T, By = 0.166 T, find the magnitude and direction of the force acting on the wire
A modem is designed to transmit at 100 kbps over a channel with 15 dB signal to nose ratio. Find the maximum symbols on the constellation of this modem.
Legend has it that, many centuries ago, Archimedes jumped out of his bathtub and ran across town naked screaming "Eureka!" after he solved an especially difficult problem.
A mortar* crew is positioned near the top of a steep hill. Enemy forces are charging up the hill and it is necessary for the crew to spring into action. How long will the mortar shell remain in the air
A police radar gun emits an electromagnetic wave at a frequency of fs = 1.08×1013 Hz. What is the speed of the oncoming car (v)
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