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A sound wave with a frequenc of 512 Hz and a wavelenth of 2.99 m is directed toward the bottom of a lake to measure its depth. If the echo of the sound from the bottom is heard 0.25 seconds later, how deep is the lake?
question1a small metal sphere carrying a net charge of -3.00 is held in a stationary position by insulating supports.
Ramon has a coherent light source with wavelength 579 nm. What is the minimum width of the screen if Ramon wants to display four interference maxima
The mass of a string is 1.00 10-3 kg, and it is stretched so the tension in it is 120 N. A transverse wave traveling on this string has a frequency of 260 Hz and a wavelength of 0.60 m. What is the length of the string?
Take element Z = 80 from the periodic table. Ionize it 79 times so that there is only one electron left orbiting around the nucleus. What is the ground state energy of the electron
The person in the middle weighs 190 N, and the tensions in each rope are 200-N. What is the weight of the staging.
What volume of space contains an energy equal. A car in stop-and-go traffic starts at rest, moves forward 12m in 8 seconds, then comes to rest again. The velocity-versus-time plot for this car is given.
A laser emits a narrow, circular beam of light. The radius of the beam is 1.37×10-3 m, and the power is 1.44×10-3 W
A 15m length of wire consists of 6.0m of copper followed by 9.0m of aluminum, both diameter 1.4mm. A voltage difference of 70mV is placed across the composite wire, What is the total resistance (sum) of the two wires
At what average rate does the force from the cable. A falling skydiver has a mass of 54.5 kg. What is the magnitude of the skydiver's acceleration when the upward force of air resistance has the magnitude that is equal to one-fourth of his weight.
A 32.0 µF capacitor is connected to a 45.0 omegacap.gif resistor and a generator whose rms output is 30.0 V at 60.0 Hz. compute The phase angle for the circuit
Find out the magnitude and direction of the initial velocity.
A lever uses an effort arm of 4.75 m and has a resistance arm of 21.5 cm. What is the mechanical advantage of the lever
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