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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 21 m. Sitting on the seat before the ride starts, a rider is level and stationary, and the electronic sensor reads 930 N. At the top of the loop, the rider is upside-down and moving, and the sensor reads 380 N. What is the speed of the rider at the top of the loop?
Two satellites, A and B, are in different circular orbits about the earth. Find the ratio (TA/TB) of the periods of the satellites
Find the radius R of the star Rigel, the bright blue star in the constellation Orion, which radiates energy at a rate of 2.7×1032 W
In a college parking lot, the number of ordinary cars is larger than the number of sport utility vehicles by 85.7%, Find the number of SUVs in the lot
Potassium is an essential element that normally comprises about 0.30% of a person's body mass. 0.12% of potassium is the radioactive K-40, What's the potassium activity in a 73kg person
determine the flux of uniform magnetic field B through the curved surface of a right circular cone, show that F through suface 1 = F through surface 2
A motorist travels at a constant speed of 35.5 m/s through a school zone, exceeding the posted speed limit. Find the time required to catch the car from the instant the car passes the policeman
Two bars of identical mass are at 30 °C. One is made from glass and the other from another substance. The specific heat capacity of glass is 840 J / (kg • C°).
A ball rolls across a floor with an acceleration of 0.100 m/s2 in a direction opposite to its velocity. What was the initial speed of the ball
A ball rolls off a table and falls 0.81 m to the floor, landing with a speed of 5.5 m/s. What initial speed must the ball have if it is to land with a speed of 6.3 m/s
Besides the traditional colorimetric acid/base indicators, there is another class that doesn't use color, the olfactory acid-base indicators! These compounds smell or don't smell based on their pH and a lot of them are plant-derived compounds
The meter stick in the drawing can rotate about an axis located at the 20.0-cm mark, Which force, F1 or F2, acts on the meter stick, and what is its magnitude
A circuit consists of two 150.?k? resistors in series with an ideal 12.0?V battery. Calculate the potential drop across one of the resistors
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