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What is the resistance of a thin tube filled by saline solution that is 2 cm in length and has a cross-sectional area of 1 x 10-5 m2? Suppose the resistivity of saline solution to be 0.1 m.
Compute the number of electrons in a small, electrically neutral silver pin that has a mass of 7.0 g. Silver has 47 electrons per atom, and its molar mass is 107.87 g/mol.
a spelunker is surveying a cave. she follows a passage 130m straight west then 290m in a direction 45degrees east of
As a tennis ball is struck, it departs from the racket horizontally by a speed of 29.0 m/s. The ball hits the court at a horizontal distance of 20.3 m from the racket. How far above the court is the tennis ball when it leaves the racket?
A space traveler moving at a speed of 0.65c with respect to the earth makes a tripto a distant star that is stationary relative to the earth. What would be the length of this same trip
A ball is thrown upward,. At 5.00 m above its launch point, the ball's speed is one-third its launch speed. What maximum height above the launch point does the ball attain
A yo-yo is made from two uniform disks, each with mass m and radius R, connected by a light axle of radius b. Find the angular acceleration of the yo-yo
As a way of determining the inductance of a coil utilized in a research project, a student first connects the coil to a 11.0 V battery and measures a current of 0.650 A. The student then connects the coil to a 24.0V (rms), 60.0 Hz generator and measu..
Two masses, m1 = 20 kg and m2 = 24 kg, are connected by a rope that hangs over a pulley. Find the magnitudes of the velocities of the masses after each of the masses travels a distance d = 1.5 meter
A bullet is shot out of a gun with a 61 cm barrel at a speed of 410 m/s into a block of wood. The bullet enters the wood 13 cm. Illustrate what force does the block exert on the bullet? What is the time it takes?
A power supply that provides a voltage of 30.0V·sin(317·t), where t is in seconds, is connectedacross a resistor R = 199 W. Calculate the average power dissipated in the resistor
Your eye (diameter 2.5 cm) is able to focus the image of a tree on your retina. What is the size of the image of the tree on your retina
A projectile is launched from ground level at an angle of 1.0° above the horizontal. It returns to ground level. To what value should thelaunch angle be adjusted, without changing the launch speed, sothat the range triples?
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