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A rock is thrown downward into a well that is 8.50 deep a)If the splash is heard 1.20 seconds later, what was the initial speed of the rock? Take the speed of sound in the air to be 343.
A small but measurable current of 1.1 10-10A exists in a copper wire whose diameter is 3.1 mm. Assume the current is uniform. Calculate the current density
A solenoid has a cross-sectional area of 2.20 10-4 m2, consists of 200 turns per meter, and carries a current of 0.56 A. Find the average current induced in the coil
A point charge q1=5microC and is fixed in place. From a horizontal distance of 6cm a small sphere of mass 0.004 kg and charge q2=2microC is fired towards the fixed charge at 40 m/s. What is the acceleration of the sphere when it is traveling 25 m/..
Analyze various philosophical approaches for ethical decision making, and the effectiveness and limits of each approach for making ethical choices and
The rod is held in the horizontal position shown and then released. Compute the initial acceleration of the mass attached to l1. Assume up is positive and down is negative
The aorta in humans has a diameter of about 1.9 cm and at certain times the blood speed through it is about 60 cm/s. find the Reynolds number for blood flow through the aorta
Mr. Physics drops a rock down a 250-meter deep well. Upon impact with the bottom of the well a short burst of sound is produced with a frequency of 250 Hz. How long after he drops the rock does he hear it hit bottom of the well.
When using 690 nm light to perform the double slit experiment, the interference in the middle is a bright fringe, If the slits are 2.48 µm apart, at what angle will we observe the first-order dark fringe
A laser beam is incident on two slits with a separation of 0.175 mm, and a screen is placed 4.85 m from the slits. estimate the wavelength of the laser light
Calculae the flow rate ( in grams per second) of blood in the aorta if the flow speed is 42 cm/s.
Westerly winds coming off the Pacific Ocean rise over the Rocky Mountains, what is the surface temperature and relative humidity on the leeward side of the mountains
Three equal positive charges Q are each fixed at a corner of an equiliateral triangle of side length a, Draw a free body diagram for the negative charge, Find the magnitudes of the net force on the negative charge
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