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A special electronic sensor is embedded in the seat of a car that takes riders around a circular loop-the-loop at an amusement park. The sensor measures the magnitude of the normal force that the seat exerts on a rider. The loop-the-loop ride is in the vertical plane and its radius is 19 m. Sitting on the seat before the ride starts, a rider is level and stationary, and the electronic sensor reads 660 N. At the top of the loop, the rider is upside-down and moving, and the sensor reads 340 N. What is the speed of the rider at the top of the loop?
The frequency doubled output of a Nd3+ YAG laser has a wavelength of 532nm. If each pulse of light has a total energy of 0.550J and the repetition rate of the laser is 30Hz, how many photons does the laser emit at 532nm in 3 minutes?
Earth has a net charge that produces an electric field of approximately 150 N/C downward at its surface. (a) What is the magnitude and sign of the excess charge.
Two solenoids are used to produce a magnetic field across a cathode-ray tube. Find the field at the center of the CRT
Suppose the coefficient of static friction between the road and the tires on a car is 0.575 and the car has no negative lift. What speed will put the car on the verge of sliding
A light rope 5m long supports a 30kg mass against gravity. What is the mass per unit length of the rope
A tungsten target is struck by electrons that have been accelerated from rest through a 20.0-kV potential difference
If you see the displayed waveform on an oscilloscope screen,given that voltage scale is 50 millivolt/division, and the timescale is 100 milliseconds/div What is the peak-to-peak amplitude for the waveform ?
A surgeon is attempting to correct a detached retina by using a pulsed laser. If the pulses last for 36.0 ms, how many photons are present in each pulse
A laser that emits pulses of UV lasting 3.65 ns has a beam diameter of 1.60 mm. What is the maximum electric field strength in this pulse
In exercise physiology studies, it is sometimes important to determine the location of a person's center of mass. How far from the woman's feet is her center of mass
A laser is used in eye surgery to weld a detached retina back into place. The wavelength of the laser beam is 470 nm, while the power is 2.2 W. how many photons are emitted by the laser
You are given an ideal air-filled parallel plate capacitor with plates of area 45.0 cm2 and separation 2.10 mm. What is the new value of the capacitance
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