Reference no: EM13963315
1. If the speed of sound is 350 m/s and the wavelength is 10 cm, what is the frequency?
2. Two otherwise identical wires are made of different materials, the second having twice the resistivity of the first. The first wire has a resistance of 2 Ohms, what is the resistance of the second wire?
3. A stretched cord of length 0.90 m and mass of 2.0 g has a fundamental frequency of 144 Hz. What is the tension in the cord?
4. If the effective spring constant of a 2000 kg older car (with poor shocks) is 6.0 x 10^4 N/m, what is the period of its vibration after hitting a bump?
5. What is the frequency of the second harmonic of a 2.00 m long stretched wire if the wave speed is 171.5 m/s?
6. In the figure below (in the attachment), a light ray traveling from air enters an unknown substance. What is the index of refraction for the unknown substance?
7. A parallel plate capacitor has circular plates with radius of 10 cm separated by 1.0 mm. If the capacitor is connected to a 12 V battery, what will the charge on the capacitor?
8. If the power dissipated in the circuit below (in the attachment) is 4.0 W, what is the voltage of the battery?
9. An object is placed 2.0 cm in front of diverging lens, which has a power of -25 diopters. Where is the image located at?
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Traditional mobile banking and mobile money transfer
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Arrange job relationships in organizations
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Find flow velocity assuming duty of engine to be constant
: A motorboat going downstream overcome a raft at a point A; t = 60 min later it turn back and after some time passed the raft at a distance 6.0 km from the point A. Find the flow velocity assuming the duty of the engine to be constant.
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What is the actual speed of the car
: A police officer w/a radar gun is parked 20 feet off of the highway. The radar gun reads 75 mph when the car is 100 feet from the police car (as measured along the highway). what is the actual speed of the car?
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What will the charge on the capacitor
: An object is placed 2.0 cm in front of diverging lens, which has a power of -25 diopters. Where is the image located at?
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Agricultural commodities and causes a recession
: Assume that another drought in Australia this summer sharply reduces Australia's exports of wheat and other agricultural commodities and causes a recession.
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How many degrees from west should the aircraft head
: The pilot of an aircraft wishes to fly due west in a 48.6km/h wind blowing toward the south. The speed of the aircraft in the absence of a wind is 174 km/h. How many degrees from west should the aircraft head? Let clockwise be positive. Answer in d..
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Compare the risk principle and need principle
: Compare and contrast the risk principle and need principle. Determine which offenders probation officers should spend most of their time with, high risk or low risk offenders
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The resistance can be hazardous and cause fire
: An office worker wants to plug in a 3000 watt 110 Volt heater into a standard 15 amp, 110 V electrical outlet. Would this be safe
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