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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 ride 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 24 m. Sitting on the seat before the ride starts, a rider is level and stationary, and the electronic sensor reads 830 N. At the top of the loop, the rider is upside down and moving, and the sensor reads 350 N. What is the speed of the rider at the top of the loop?
It is observed that the size of a real image formed by a concavemirror is four times thesize of the object when the object is 32.5 cm in front of the mirror. What is the radius of curvature of this mirror?
A 0.70 kg ball is moving horizontally with a speed of 9.7 m/s when it strikes a vertical wall. What is the magnitude of the change in linear momentum of the ball
A tungsten target is struck by electrons that have been accelerated from rest through a 67.8-kV potential difference. Find the shortest wavelength of the radiation emitted
A highway curve with a radius of 555 m is banked properly for the car travelling 150 km/h. If a 1650 kg Porshe 928 S rounds the curve at 220 km/h, how much sideways force must the tires exert against the road if the car does not skid.
You are driving into St. Louis, Missouri, and in the distance you see the famous Gateway-to-the-West arch. how far (in kilometers) are you from the base of the arch
An incredibly large slingshot is stretched 1.5 meters to launch a 180.0-gram projectile with a speed sufficient to escape from the Earth (11.2 km/s). How many people would be required to stretch the slingshot
The microwave radiation left over from the Big Bang explosion of the universe has an average energy density of 4. 10-14 J/m3. What is the rms value of the electric field of this radiation
The density of ice is 917 kg/m3, and the density of sea water is 1025 kg/m3. What is the weight of the heaviest bear
Two moles of an ideal gas are placed in a container whose volume is 6.9 x 10-3 m3. What is the average translational kinetic energy of a molecule of the gas
A child's toy consists of a piece of plastic attached to a spring. The spring is compressed against the floor a distance of 1.2 cm, and the toy is released. If the spring constant is 103 N/m, what is the magnitude of the spring force acting on the..
A gnat takes off from one end of a pencil and flies around erratically for 18.1 seconds before landing on the other end of the same pencil. find the gnat\'s average speed
A massless spring is compressed between blocks of mass x and 5x on a smooth horizontal frictionless surface. What fraction of the total energy does the small block recieve
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