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A 1.1 kg birdfeeder hangs from a horizontal tree branch. The birdfeeder is attached to the branch at a point that is 1.0 m from the trunk. What is the amount of torque exerted by the birdfeeder on the branch? The origin is at the pivot point, where the branch attaches to the trunk.
A 1560kg car is travelling with a speed of 14.20 m/s. What is the magnitude of the horizontal net force that is required to bring car to a halt in a distance of 52.10 m.
A cell membrane is composed of lipid molecules and approximately 11 nm thick, what is the approximate capacitance of a spherical cell that has a diameter of 11mu or micro m
The temperature of 1.5 kg of ethanol is 37c. What would the final temperature be if 80 000J of energy as heat is added to the ethanol.
A guitar string is 90 cm long and has a mass of 3.6g . The distance from the bridge to the support post is L=62cm, What is the fundamental frequency of this string
You can ignore air resistance. Explain how far from the point of firing does the other fragment strike if the terrain is level?
Describe an experiment to measure the molecular weight Mw and the second viral coefficient B of a macromolecules in solution using osmotic pressur. Show how you would plot the experimental data.
A bat flying in a cave emits the sound pulse and receives its echo in 3.5 s. How far away is the cave wall.
Light is an electromagnetic wave and travels at a speed of 3.00 x 10^8 m/s. The human eye is most sensitive to yellow-green light, that has a wavelength of 5.45 x 10^-7m. How you find the frequency of this light.
During this process the arrow's deceleration has a magnitude of 1600 and the block's acceleration has a magnitude of 450. Explain how long does it take for the arrow to stop moving with respect to the block?
A coil consists of 212 turns of wire. Each turn is a square of side d = 18 cm, compute the magnitude of the induced emf in the coil
A transformer on a pole near a factory steps the voltage down from 3600 V (rms) to 120 V (rms). The transformer is to deliver 2000 kW to the factory at 95% efficiency. Find values for the the power delivered to the primary
On a workday the average decibel level of a busy street is 80 dB, with 100 cars passing a given point every minute. If the number of cars is reduced to 45 every minute on a weekend, what is the decibel level of the street.
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