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Describe the operation of a scanning tunneling microscope and explicitly include how it involves barrier tunneling.
A 51.0-g Super Ball traveling at 27.0 m/s bounces off a brick wall and rebounds at 21.5 m/s. what is the magnitude of the average acceleration of the ball during this time interval
Two charges, -3.5?C and -4.4?C , are located at (-0.70m , 0) and (0.70m , 0), respectively. find the location of the point where the electric field is zero
A skier is gliding along at 2.8m/s on horizontal, frictionless snow. He suddenly starts down a 10?incline. what is the distance of the incline
The period of motion of an object-spring system is T = 0.546 s when an object of mass m = 254 g is attached to the spring, Find the frequency of motion in hertz
You fire a gun horizontally that is 25m off the ground and the bullet goes at 200m/s. What is the time it takes for the bullet to hit ground, how far down range does bullet travel, and what is the resultant velocity (in m/s) and final angle.
A sphere of mass ofm= 1.40 kg is first placed directly on the plate of an electronic scale. The scale shows 13.73 N as the weight of the object. Calculate the density of the sphere
Leigh is doing a knee extension exercise using a 100 N weight strapped to her ankle 40 cm from her knee joint. For this position, what torque is created by the dumbbell about her knee joint axis
An alpha particle (the nucleus of a helium atom) consists of two protons and two neutrons. what is the strength of the magnetic field
Two conductors are made of the same material and have the same length. Conductor A is a solid wire of diameter 1.3 mm. What is the resistance ratio RA/RB , measured between their ends
A mini-fridge needs to maintain a temperature of 277 K. The air outside the mini-fridge has a temperature of 301 K. What is the coefficient of performance of this mini-fridge
An iron tower in is 399 meters tall on a cold day (T = -6.7 degrees Celsius). What is its height of the tower on a hot day while the temperature is 31.5 degrees Celsius.
Calculate the electric field from four point-charge: +q at -d and -q at -d/2; 2q at d and -2q at d/2 on the z-axis, First calculate the electric potential, and then calculate its radient.
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